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| author | Sehong Na <sehong.na@samsung.com> | 2014-05-31 13:21:44 +0900 |
|---|---|---|
| committer | Sehong Na <sehong.na@samsung.com> | 2014-05-31 13:21:44 +0900 |
| commit | ea0d53a749fd8772ccd68ab84132b791d1754475 (patch) | |
| tree | 027aef01301693ff84ecadd5200bffce32450a88 /doc | |
| download | zeromq-ea0d53a749fd8772ccd68ab84132b791d1754475.tar.gz zeromq-ea0d53a749fd8772ccd68ab84132b791d1754475.tar.bz2 zeromq-ea0d53a749fd8772ccd68ab84132b791d1754475.zip | |
Initialize Tizen 2.3submit/tizen_2.3/20140531.1157412.3a_releasetizen_2.3
Diffstat (limited to 'doc')
132 files changed, 56084 insertions, 0 deletions
diff --git a/doc/Makefile.am b/doc/Makefile.am new file mode 100644 index 0000000..2a19124 --- /dev/null +++ b/doc/Makefile.am @@ -0,0 +1,51 @@ +MAN3 = zmq_bind.3 zmq_unbind.3 zmq_connect.3 zmq_disconnect.3 zmq_close.3 \ + zmq_ctx_new.3 zmq_ctx_destroy.3 zmq_ctx_get.3 zmq_ctx_set.3 \ + zmq_msg_init.3 zmq_msg_init_data.3 zmq_msg_init_size.3 \ + zmq_msg_move.3 zmq_msg_copy.3 zmq_msg_size.3 zmq_msg_data.3 zmq_msg_close.3 \ + zmq_msg_send.3 zmq_msg_recv.3 \ + zmq_send.3 zmq_recv.3 \ + zmq_msg_get.3 zmq_msg_set.3 zmq_msg_more.3 \ + zmq_getsockopt.3 zmq_setsockopt.3 \ + zmq_socket.3 zmq_socket_monitor.3 zmq_poll.3 \ + zmq_errno.3 zmq_strerror.3 zmq_version.3 zmq_proxy.3 \ + zmq_sendmsg.3 zmq_recvmsg.3 zmq_init.3 zmq_term.3 + +MAN7 = zmq.7 zmq_tcp.7 zmq_pgm.7 zmq_epgm.7 zmq_inproc.7 zmq_ipc.7 + +MAN_DOC = $(MAN1) $(MAN3) $(MAN7) + +MAN_TXT = $(MAN3:%.3=%.txt) +MAN_TXT += $(MAN7:%.7=%.txt) +MAN_HTML = $(MAN_TXT:%.txt=%.html) + +if INSTALL_MAN +dist_man_MANS = $(MAN_DOC) +endif + +EXTRA_DIST = asciidoc.conf $(MAN_TXT) +if BUILD_DOC +EXTRA_DIST += $(MAN_HTML) +endif + +MAINTAINERCLEANFILES = $(MAN_DOC) $(MAN_HTML) + +dist-hook : $(MAN_DOC) $(MAN_HTML) + +if BUILD_DOC +SUFFIXES=.html .txt .xml .3 .7 + +.txt.html: + asciidoc -d manpage -b xhtml11 -f $(srcdir)/asciidoc.conf \ + -azmq_version=@PACKAGE_VERSION@ -o$@ $< +.txt.xml: + asciidoc -d manpage -b docbook -f $(srcdir)/asciidoc.conf \ + -azmq_version=@PACKAGE_VERSION@ -o$@ $< +.xml.1: + xmlto man $< +.xml.3: + xmlto man $< +.xml.7: + xmlto man $< +zmq_epgm.7: zmq_pgm.7 + cp zmq_pgm.7 $@ +endif diff --git a/doc/Makefile.in b/doc/Makefile.in new file mode 100644 index 0000000..9400bd8 --- /dev/null +++ b/doc/Makefile.in @@ -0,0 +1,557 @@ +# Makefile.in generated by automake 1.11.3 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software +# Foundation, Inc. +# This Makefile.in is free software; the Free 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uninstall-am \ + uninstall-man uninstall-man3 uninstall-man7 + + +dist-hook : $(MAN_DOC) $(MAN_HTML) + +@BUILD_DOC_TRUE@.txt.html: +@BUILD_DOC_TRUE@ asciidoc -d manpage -b xhtml11 -f $(srcdir)/asciidoc.conf \ +@BUILD_DOC_TRUE@ -azmq_version=@PACKAGE_VERSION@ -o$@ $< +@BUILD_DOC_TRUE@.txt.xml: +@BUILD_DOC_TRUE@ asciidoc -d manpage -b docbook -f $(srcdir)/asciidoc.conf \ +@BUILD_DOC_TRUE@ -azmq_version=@PACKAGE_VERSION@ -o$@ $< +@BUILD_DOC_TRUE@.xml.1: +@BUILD_DOC_TRUE@ xmlto man $< +@BUILD_DOC_TRUE@.xml.3: +@BUILD_DOC_TRUE@ xmlto man $< +@BUILD_DOC_TRUE@.xml.7: +@BUILD_DOC_TRUE@ xmlto man $< +@BUILD_DOC_TRUE@zmq_epgm.7: zmq_pgm.7 +@BUILD_DOC_TRUE@ cp zmq_pgm.7 $@ + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/doc/asciidoc.conf b/doc/asciidoc.conf new file mode 100644 index 0000000..d73d711 --- /dev/null +++ b/doc/asciidoc.conf @@ -0,0 +1,56 @@ +[paradef-default] +literal-style=template="literalparagraph" + +[macros] +(?su)[\\]?(?P<name>linkzmq):(?P<target>\S*?)\[(?P<attrlist>.*?)\]= + +ifdef::backend-docbook[] +[linkzmq-inlinemacro] +{0%{target}} +{0#<citerefentry>} +{0#<refentrytitle>{target}</refentrytitle><manvolnum>{0}</manvolnum>} +{0#</citerefentry>} +endif::backend-docbook[] + +ifdef::backend-xhtml11[] +[linkzmq-inlinemacro] +<a href="{target}.html">{target}{0?({0})}</a> +endif::backend-xhtml11[] + +ifdef::doctype-manpage[] +ifdef::backend-docbook[] +[header] +template::[header-declarations] +<refentry> +<refmeta> +<refentrytitle>{mantitle}</refentrytitle> +<manvolnum>{manvolnum}</manvolnum> +<refmiscinfo class="source">0MQ</refmiscinfo> +<refmiscinfo class="version">{zmq_version}</refmiscinfo> +<refmiscinfo class="manual">0MQ Manual</refmiscinfo> +</refmeta> +<refnamediv> + <refname>{manname}</refname> + <refpurpose>{manpurpose}</refpurpose> +</refnamediv> +endif::backend-docbook[] +endif::doctype-manpage[] + +ifdef::backend-xhtml11[] +[footer] +</div> +{disable-javascript%<div id="footnotes"><hr /></div>} +<div id="footer"> +<div id="footer-text"> +ØMQ {zmq_version}<br /> +Last updated {docdate} {doctime} +</div> +</div> +</body> +</html> +endif::backend-xhtml11[] + +[replacements] +ifdef::backend-xhtml11[] +0MQ=ØMQ +endif::backend-xhtml11[] diff --git a/doc/zmq.7 b/doc/zmq.7 new file mode 100644 index 0000000..06859cf --- /dev/null +++ b/doc/zmq.7 @@ -0,0 +1,285 @@ +'\" t +.\" Title: zmq +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ" "7" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq \- 0MQ lightweight messaging kernel +.SH "SYNOPSIS" +.sp +\fB#include <zmq\&.h>\fR +.sp +\fBcc\fR [\fIflags\fR] \fIfiles\fR \fB\-lzmq\fR [\fIlibraries\fR] +.SH "DESCRIPTION" +.sp +The 0MQ lightweight messaging kernel is a library which extends the standard socket interfaces with features traditionally provided by specialised \fImessaging middleware\fR products\&. 0MQ sockets provide an abstraction of asynchronous \fImessage queues\fR, multiple \fImessaging patterns\fR, message filtering (\fIsubscriptions\fR), seamless access to multiple \fItransport protocols\fR and more\&. +.sp +This documentation presents an overview of 0MQ concepts, describes how 0MQ abstracts standard sockets and provides a reference manual for the functions provided by the 0MQ library\&. +.SS "Context" +.sp +Before using any 0MQ library functions you must create a 0MQ \fIcontext\fR\&. When you exit your application you must destroy the \fIcontext\fR\&. These functions let you work with \fIcontexts\fR: +.PP +Create a new 0MQ context +.RS 4 + +\fBzmq_ctx_new\fR(3) +.RE +.PP +Work with context properties +.RS 4 + +\fBzmq_ctx_set\fR(3) +\fBzmq_ctx_get\fR(3) +.RE +.PP +Destroy a 0MQ context +.RS 4 + +\fBzmq_ctx_destroy\fR(3) +.RE +.PP +Monitor a 0MQ context +.RS 4 + +\fBzmq_ctx_set_monitor\fR(3) +.RE +.sp +These deprecated functions let you create and destroy \fIcontexts\fR: +.PP +Initialise 0MQ context +.RS 4 + +\fBzmq_init\fR(3) +.RE +.PP +Terminate 0MQ context +.RS 4 + +\fBzmq_term\fR(3) +.RE +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBThread safety\fR +.RS 4 +.sp +A 0MQ \fIcontext\fR is thread safe and may be shared among as many application threads as necessary, without any additional locking required on the part of the caller\&. +.sp +Individual 0MQ \fIsockets\fR are \fInot\fR thread safe except in the case where full memory barriers are issued when migrating a socket from one thread to another\&. In practice this means applications can create a socket in one thread with \fIzmq_socket()\fR and then pass it to a \fInewly created\fR thread as part of thread initialization, for example via a structure passed as an argument to \fIpthread_create()\fR\&. +.RE +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBMultiple contexts\fR +.RS 4 +.sp +Multiple \fIcontexts\fR may coexist within a single application\&. Thus, an application can use 0MQ directly and at the same time make use of any number of additional libraries or components which themselves make use of 0MQ as long as the above guidelines regarding thread safety are adhered to\&. +.RE +.SS "Messages" +.sp +A 0MQ message is a discrete unit of data passed between applications or components of the same application\&. 0MQ messages have no internal structure and from the point of view of 0MQ itself they are considered to be opaque binary data\&. +.sp +The following functions are provided to work with messages: +.PP +Initialise a message +.RS 4 + +\fBzmq_msg_init\fR(3) +\fBzmq_msg_init_size\fR(3) +\fBzmq_msg_init_data\fR(3) +.RE +.PP +Sending and receiving a message +.RS 4 + +\fBzmq_msg_send\fR(3) +\fBzmq_msg_recv\fR(3) +.RE +.PP +Release a message +.RS 4 + +\fBzmq_msg_close\fR(3) +.RE +.PP +Access message content +.RS 4 + +\fBzmq_msg_data\fR(3) +\fBzmq_msg_size\fR(3) +\fBzmq_msg_more\fR(3) +.RE +.PP +Work with message properties +.RS 4 + +\fBzmq_msg_get\fR(3) +\fBzmq_msg_set\fR(3) +.RE +.PP +Message manipulation +.RS 4 + +\fBzmq_msg_copy\fR(3) +\fBzmq_msg_move\fR(3) +.RE +.SS "Sockets" +.sp +0MQ sockets present an abstraction of a asynchronous \fImessage queue\fR, with the exact queueing semantics depending on the socket type in use\&. See \fBzmq_socket\fR(3) for the socket types provided\&. +.sp +The following functions are provided to work with sockets: +.PP +Creating a socket +.RS 4 + +\fBzmq_socket\fR(3) +.RE +.PP +Closing a socket +.RS 4 + +\fBzmq_close\fR(3) +.RE +.PP +Manipulating socket options +.RS 4 + +\fBzmq_getsockopt\fR(3) +\fBzmq_setsockopt\fR(3) +.RE +.PP +Establishing a message flow +.RS 4 + +\fBzmq_bind\fR(3) +\fBzmq_connect\fR(3) +.RE +.PP +Sending and receiving messages +.RS 4 + +\fBzmq_msg_send\fR(3) +\fBzmq_msg_recv\fR(3) +\fBzmq_send\fR(3) +\fBzmq_recv\fR(3) +.RE +.PP +\fBInput/output multiplexing\fR. 0MQ provides a mechanism for applications to multiplex input/output events over a set containing both 0MQ sockets and standard sockets\&. This mechanism mirrors the standard +\fIpoll()\fR +system call, and is described in detail in +\fBzmq_poll\fR(3)\&. +.SS "Transports" +.sp +A 0MQ socket can use multiple different underlying transport mechanisms\&. Each transport mechanism is suited to a particular purpose and has its own advantages and drawbacks\&. +.sp +The following transport mechanisms are provided: +.PP +Unicast transport using TCP +.RS 4 + +\fBzmq_tcp\fR(7) +.RE +.PP +Reliable multicast transport using PGM +.RS 4 + +\fBzmq_pgm\fR(7) +.RE +.PP +Local inter\-process communication transport +.RS 4 + +\fBzmq_ipc\fR(7) +.RE +.PP +Local in\-process (inter\-thread) communication transport +.RS 4 + +\fBzmq_inproc\fR(7) +.RE +.SS "Proxies" +.sp +0MQ provides \fIproxies\fR to create fanout and fan\-in topologies\&. A proxy connects a \fIfrontend\fR socket to a \fIbackend\fR socket and switches all messages between the two sockets, opaquely\&. A proxy may optionally capture all traffic to a third socket\&. To start a proxy in an application thread, use \fBzmq_proxy\fR(3)\&. +.SH "ERROR HANDLING" +.sp +The 0MQ library functions handle errors using the standard conventions found on POSIX systems\&. Generally, this means that upon failure a 0MQ library function shall return either a NULL value (if returning a pointer) or a negative value (if returning an integer), and the actual error code shall be stored in the \fIerrno\fR variable\&. +.sp +On non\-POSIX systems some users may experience issues with retrieving the correct value of the \fIerrno\fR variable\&. The \fIzmq_errno()\fR function is provided to assist in these cases; for details refer to \fBzmq_errno\fR(3)\&. +.sp +The \fIzmq_strerror()\fR function is provided to translate 0MQ\-specific error codes into error message strings; for details refer to \fBzmq_strerror\fR(3)\&. +.SH "MISCELLANEOUS" +.sp +The following miscellaneous functions are provided: +.PP +Report 0MQ library version +.RS 4 + +\fBzmq_version\fR(3) +.RE +.SH "LANGUAGE BINDINGS" +.sp +The 0MQ library provides interfaces suitable for calling from programs in any language; this documentation documents those interfaces as they would be used by C programmers\&. The intent is that programmers using 0MQ from other languages shall refer to this documentation alongside any documentation provided by the vendor of their language binding\&. +.sp +Language bindings (C++, Python, PHP, Ruby, Java and more) are provided by members of the 0MQ community and pointers can be found on the 0MQ website\&. +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Lucina <\m[blue]\fBmartin@lucina\&.net\fR\m[]\&\s-2\u[2]\d\s+2>, and Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "RESOURCES" +.sp +Main web site: \m[blue]\fBhttp://www\&.zeromq\&.org/\fR\m[] +.sp +Report bugs to the 0MQ development mailing list: <\m[blue]\fBzeromq\-dev@lists\&.zeromq\&.org\fR\m[]\&\s-2\u[4]\d\s+2> +.SH "COPYING" +.sp +Free use of this software is granted under the terms of the GNU Lesser General Public License (LGPL)\&. For details see the files COPYING and COPYING\&.LESSER included with the 0MQ distribution\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +martin@lucina.net +.RS 4 +\%mailto:martin@lucina.net +.RE +.IP " 3." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE +.IP " 4." 4 +zeromq-dev@lists.zeromq.org +.RS 4 +\%mailto:zeromq-dev@lists.zeromq.org +.RE diff --git a/doc/zmq.html b/doc/zmq.html new file mode 100644 index 0000000..6cdee33 --- /dev/null +++ b/doc/zmq.html @@ -0,0 +1,1094 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq(7) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq -
+ 0MQ lightweight messaging kernel
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>#include <zmq.h></strong></p></div>
+<div class="paragraph"><p><strong>cc</strong> [<em>flags</em>] <em>files</em> <strong>-lzmq</strong> [<em>libraries</em>]</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The ØMQ lightweight messaging kernel is a library which extends the standard
+socket interfaces with features traditionally provided by specialised
+<em>messaging middleware</em> products. ØMQ sockets provide an abstraction of
+asynchronous <em>message queues</em>, multiple <em>messaging patterns</em>, message
+filtering (<em>subscriptions</em>), seamless access to multiple <em>transport protocols</em>
+and more.</p></div>
+<div class="paragraph"><p>This documentation presents an overview of ØMQ concepts, describes how ØMQ
+abstracts standard sockets and provides a reference manual for the functions
+provided by the ØMQ library.</p></div>
+<div class="sect2">
+<h3 id="_context">Context</h3>
+<div class="paragraph"><p>Before using any ØMQ library functions you must create a ØMQ <em>context</em>. When
+you exit your application you must destroy the <em>context</em>. These functions let
+you work with <em>contexts</em>:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+Create a new ØMQ context
+</dt>
+<dd>
+<p>
+ <a href="zmq_ctx_new.html">zmq_ctx_new(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Work with context properties
+</dt>
+<dd>
+<p>
+ <a href="zmq_ctx_set.html">zmq_ctx_set(3)</a>
+ <a href="zmq_ctx_get.html">zmq_ctx_get(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Destroy a ØMQ context
+</dt>
+<dd>
+<p>
+ <a href="zmq_ctx_destroy.html">zmq_ctx_destroy(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Monitor a ØMQ context
+</dt>
+<dd>
+<p>
+ <a href="zmq_ctx_set_monitor.html">zmq_ctx_set_monitor(3)</a>
+</p>
+</dd>
+</dl></div>
+<div class="paragraph"><p>These deprecated functions let you create and destroy <em>contexts</em>:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+Initialise ØMQ context
+</dt>
+<dd>
+<p>
+ <a href="zmq_init.html">zmq_init(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Terminate ØMQ context
+</dt>
+<dd>
+<p>
+ <a href="zmq_term.html">zmq_term(3)</a>
+</p>
+</dd>
+</dl></div>
+<div class="sect3">
+<h4 id="_thread_safety">Thread safety</h4>
+<div class="paragraph"><p>A ØMQ <em>context</em> is thread safe and may be shared among as many application
+threads as necessary, without any additional locking required on the part of
+the caller.</p></div>
+<div class="paragraph"><p>Individual ØMQ <em>sockets</em> are <em>not</em> thread safe except in the case where full
+memory barriers are issued when migrating a socket from one thread to another.
+In practice this means applications can create a socket in one thread with
+<em>zmq_socket()</em> and then pass it to a <em>newly created</em> thread as part of thread
+initialization, for example via a structure passed as an argument to
+<em>pthread_create()</em>.</p></div>
+</div>
+<div class="sect3">
+<h4 id="_multiple_contexts">Multiple contexts</h4>
+<div class="paragraph"><p>Multiple <em>contexts</em> may coexist within a single application. Thus, an
+application can use ØMQ directly and at the same time make use of any number of
+additional libraries or components which themselves make use of ØMQ as long as
+the above guidelines regarding thread safety are adhered to.</p></div>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_messages">Messages</h3>
+<div class="paragraph"><p>A ØMQ message is a discrete unit of data passed between applications or
+components of the same application. ØMQ messages have no internal structure and
+from the point of view of ØMQ itself they are considered to be opaque binary
+data.</p></div>
+<div class="paragraph"><p>The following functions are provided to work with messages:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+Initialise a message
+</dt>
+<dd>
+<p>
+ <a href="zmq_msg_init.html">zmq_msg_init(3)</a>
+ <a href="zmq_msg_init_size.html">zmq_msg_init_size(3)</a>
+ <a href="zmq_msg_init_data.html">zmq_msg_init_data(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Sending and receiving a message
+</dt>
+<dd>
+<p>
+ <a href="zmq_msg_send.html">zmq_msg_send(3)</a>
+ <a href="zmq_msg_recv.html">zmq_msg_recv(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Release a message
+</dt>
+<dd>
+<p>
+ <a href="zmq_msg_close.html">zmq_msg_close(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Access message content
+</dt>
+<dd>
+<p>
+ <a href="zmq_msg_data.html">zmq_msg_data(3)</a>
+ <a href="zmq_msg_size.html">zmq_msg_size(3)</a>
+ <a href="zmq_msg_more.html">zmq_msg_more(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Work with message properties
+</dt>
+<dd>
+<p>
+ <a href="zmq_msg_get.html">zmq_msg_get(3)</a>
+ <a href="zmq_msg_set.html">zmq_msg_set(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Message manipulation
+</dt>
+<dd>
+<p>
+ <a href="zmq_msg_copy.html">zmq_msg_copy(3)</a>
+ <a href="zmq_msg_move.html">zmq_msg_move(3)</a>
+</p>
+</dd>
+</dl></div>
+</div>
+<div class="sect2">
+<h3 id="_sockets">Sockets</h3>
+<div class="paragraph"><p>ØMQ sockets present an abstraction of a asynchronous <em>message queue</em>, with the
+exact queueing semantics depending on the socket type in use. See
+<a href="zmq_socket.html">zmq_socket(3)</a> for the socket types provided.</p></div>
+<div class="paragraph"><p>The following functions are provided to work with sockets:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+Creating a socket
+</dt>
+<dd>
+<p>
+ <a href="zmq_socket.html">zmq_socket(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Closing a socket
+</dt>
+<dd>
+<p>
+ <a href="zmq_close.html">zmq_close(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Manipulating socket options
+</dt>
+<dd>
+<p>
+ <a href="zmq_getsockopt.html">zmq_getsockopt(3)</a>
+ <a href="zmq_setsockopt.html">zmq_setsockopt(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Establishing a message flow
+</dt>
+<dd>
+<p>
+ <a href="zmq_bind.html">zmq_bind(3)</a>
+ <a href="zmq_connect.html">zmq_connect(3)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Sending and receiving messages
+</dt>
+<dd>
+<p>
+ <a href="zmq_msg_send.html">zmq_msg_send(3)</a>
+ <a href="zmq_msg_recv.html">zmq_msg_recv(3)</a>
+ <a href="zmq_send.html">zmq_send(3)</a>
+ <a href="zmq_recv.html">zmq_recv(3)</a>
+</p>
+</dd>
+</dl></div>
+<div class="paragraph"><div class="title">Input/output multiplexing</div><p>ØMQ provides a mechanism for applications to multiplex input/output events over
+a set containing both ØMQ sockets and standard sockets. This mechanism mirrors
+the standard <em>poll()</em> system call, and is described in detail in
+<a href="zmq_poll.html">zmq_poll(3)</a>.</p></div>
+</div>
+<div class="sect2">
+<h3 id="_transports">Transports</h3>
+<div class="paragraph"><p>A ØMQ socket can use multiple different underlying transport mechanisms.
+Each transport mechanism is suited to a particular purpose and has its own
+advantages and drawbacks.</p></div>
+<div class="paragraph"><p>The following transport mechanisms are provided:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+Unicast transport using TCP
+</dt>
+<dd>
+<p>
+ <a href="zmq_tcp.html">zmq_tcp(7)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Reliable multicast transport using PGM
+</dt>
+<dd>
+<p>
+ <a href="zmq_pgm.html">zmq_pgm(7)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Local inter-process communication transport
+</dt>
+<dd>
+<p>
+ <a href="zmq_ipc.html">zmq_ipc(7)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+Local in-process (inter-thread) communication transport
+</dt>
+<dd>
+<p>
+ <a href="zmq_inproc.html">zmq_inproc(7)</a>
+</p>
+</dd>
+</dl></div>
+</div>
+<div class="sect2">
+<h3 id="_proxies">Proxies</h3>
+<div class="paragraph"><p>ØMQ provides <em>proxies</em> to create fanout and fan-in topologies. A proxy connects
+a <em>frontend</em> socket to a <em>backend</em> socket and switches all messages between the
+two sockets, opaquely. A proxy may optionally capture all traffic to a third
+socket. To start a proxy in an application thread, use <a href="zmq_proxy.html">zmq_proxy(3)</a>.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_error_handling">ERROR HANDLING</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The ØMQ library functions handle errors using the standard conventions found on
+POSIX systems. Generally, this means that upon failure a ØMQ library function
+shall return either a NULL value (if returning a pointer) or a negative value
+(if returning an integer), and the actual error code shall be stored in the
+<em>errno</em> variable.</p></div>
+<div class="paragraph"><p>On non-POSIX systems some users may experience issues with retrieving the
+correct value of the <em>errno</em> variable. The <em>zmq_errno()</em> function is provided
+to assist in these cases; for details refer to <a href="zmq_errno.html">zmq_errno(3)</a>.</p></div>
+<div class="paragraph"><p>The <em>zmq_strerror()</em> function is provided to translate ØMQ-specific error codes
+into error message strings; for details refer to <a href="zmq_strerror.html">zmq_strerror(3)</a>.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_miscellaneous">MISCELLANEOUS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The following miscellaneous functions are provided:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+Report ØMQ library version
+</dt>
+<dd>
+<p>
+ <a href="zmq_version.html">zmq_version(3)</a>
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_language_bindings">LANGUAGE BINDINGS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The ØMQ library provides interfaces suitable for calling from programs in any
+language; this documentation documents those interfaces as they would be used
+by C programmers. The intent is that programmers using ØMQ from other languages
+shall refer to this documentation alongside any documentation provided by the
+vendor of their language binding.</p></div>
+<div class="paragraph"><p>Language bindings (C++, Python, PHP, Ruby, Java and more) are provided by
+members of the ØMQ community and pointers can be found on the ØMQ website.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>>,
+Martin Lucina <<a href="mailto:martin@lucina.net">martin@lucina.net</a>>, and Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_resources">RESOURCES</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Main web site: <a href="http://www.zeromq.org/">http://www.zeromq.org/</a></p></div>
+<div class="paragraph"><p>Report bugs to the ØMQ development mailing list: <<a href="mailto:zeromq-dev@lists.zeromq.org">zeromq-dev@lists.zeromq.org</a>></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_copying">COPYING</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Free use of this software is granted under the terms of the GNU Lesser General
+Public License (LGPL). For details see the files <tt>COPYING</tt> and <tt>COPYING.LESSER</tt>
+included with the ØMQ distribution.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq.txt b/doc/zmq.txt new file mode 100644 index 0000000..4c79e4d --- /dev/null +++ b/doc/zmq.txt @@ -0,0 +1,233 @@ +zmq(7) +====== + + +NAME +---- +zmq - 0MQ lightweight messaging kernel + + +SYNOPSIS +-------- +*#include <zmq.h>* + +*cc* ['flags'] 'files' *-lzmq* ['libraries'] + + +DESCRIPTION +----------- +The 0MQ lightweight messaging kernel is a library which extends the standard +socket interfaces with features traditionally provided by specialised +_messaging middleware_ products. 0MQ sockets provide an abstraction of +asynchronous _message queues_, multiple _messaging patterns_, message +filtering (_subscriptions_), seamless access to multiple _transport protocols_ +and more. + +This documentation presents an overview of 0MQ concepts, describes how 0MQ +abstracts standard sockets and provides a reference manual for the functions +provided by the 0MQ library. + + +Context +~~~~~~~ +Before using any 0MQ library functions you must create a 0MQ 'context'. When +you exit your application you must destroy the 'context'. These functions let +you work with 'contexts': + +Create a new 0MQ context:: + linkzmq:zmq_ctx_new[3] + +Work with context properties:: + linkzmq:zmq_ctx_set[3] + linkzmq:zmq_ctx_get[3] + +Destroy a 0MQ context:: + linkzmq:zmq_ctx_destroy[3] + +Monitor a 0MQ context:: + linkzmq:zmq_ctx_set_monitor[3] + +These deprecated functions let you create and destroy 'contexts': + +Initialise 0MQ context:: + linkzmq:zmq_init[3] + +Terminate 0MQ context:: + linkzmq:zmq_term[3] + + +Thread safety +^^^^^^^^^^^^^ +A 0MQ 'context' is thread safe and may be shared among as many application +threads as necessary, without any additional locking required on the part of +the caller. + +Individual 0MQ 'sockets' are _not_ thread safe except in the case where full +memory barriers are issued when migrating a socket from one thread to another. +In practice this means applications can create a socket in one thread with +_zmq_socket()_ and then pass it to a _newly created_ thread as part of thread +initialization, for example via a structure passed as an argument to +_pthread_create()_. + + +Multiple contexts +^^^^^^^^^^^^^^^^^ +Multiple 'contexts' may coexist within a single application. Thus, an +application can use 0MQ directly and at the same time make use of any number of +additional libraries or components which themselves make use of 0MQ as long as +the above guidelines regarding thread safety are adhered to. + + +Messages +~~~~~~~~ +A 0MQ message is a discrete unit of data passed between applications or +components of the same application. 0MQ messages have no internal structure and +from the point of view of 0MQ itself they are considered to be opaque binary +data. + +The following functions are provided to work with messages: + +Initialise a message:: + linkzmq:zmq_msg_init[3] + linkzmq:zmq_msg_init_size[3] + linkzmq:zmq_msg_init_data[3] + +Sending and receiving a message:: + linkzmq:zmq_msg_send[3] + linkzmq:zmq_msg_recv[3] + +Release a message:: + linkzmq:zmq_msg_close[3] + +Access message content:: + linkzmq:zmq_msg_data[3] + linkzmq:zmq_msg_size[3] + linkzmq:zmq_msg_more[3] + +Work with message properties:: + linkzmq:zmq_msg_get[3] + linkzmq:zmq_msg_set[3] + +Message manipulation:: + linkzmq:zmq_msg_copy[3] + linkzmq:zmq_msg_move[3] + + +Sockets +~~~~~~~ +0MQ sockets present an abstraction of a asynchronous _message queue_, with the +exact queueing semantics depending on the socket type in use. See +linkzmq:zmq_socket[3] for the socket types provided. + +The following functions are provided to work with sockets: + +Creating a socket:: + linkzmq:zmq_socket[3] + +Closing a socket:: + linkzmq:zmq_close[3] + +Manipulating socket options:: + linkzmq:zmq_getsockopt[3] + linkzmq:zmq_setsockopt[3] + +Establishing a message flow:: + linkzmq:zmq_bind[3] + linkzmq:zmq_connect[3] + +Sending and receiving messages:: + linkzmq:zmq_msg_send[3] + linkzmq:zmq_msg_recv[3] + linkzmq:zmq_send[3] + linkzmq:zmq_recv[3] + +.Input/output multiplexing +0MQ provides a mechanism for applications to multiplex input/output events over +a set containing both 0MQ sockets and standard sockets. This mechanism mirrors +the standard _poll()_ system call, and is described in detail in +linkzmq:zmq_poll[3]. + + +Transports +~~~~~~~~~~ +A 0MQ socket can use multiple different underlying transport mechanisms. +Each transport mechanism is suited to a particular purpose and has its own +advantages and drawbacks. + +The following transport mechanisms are provided: + +Unicast transport using TCP:: + linkzmq:zmq_tcp[7] + +Reliable multicast transport using PGM:: + linkzmq:zmq_pgm[7] + +Local inter-process communication transport:: + linkzmq:zmq_ipc[7] + +Local in-process (inter-thread) communication transport:: + linkzmq:zmq_inproc[7] + + +Proxies +~~~~~~~ +0MQ provides 'proxies' to create fanout and fan-in topologies. A proxy connects +a 'frontend' socket to a 'backend' socket and switches all messages between the +two sockets, opaquely. A proxy may optionally capture all traffic to a third +socket. To start a proxy in an application thread, use linkzmq:zmq_proxy[3]. + + +ERROR HANDLING +-------------- +The 0MQ library functions handle errors using the standard conventions found on +POSIX systems. Generally, this means that upon failure a 0MQ library function +shall return either a NULL value (if returning a pointer) or a negative value +(if returning an integer), and the actual error code shall be stored in the +'errno' variable. + +On non-POSIX systems some users may experience issues with retrieving the +correct value of the 'errno' variable. The _zmq_errno()_ function is provided +to assist in these cases; for details refer to linkzmq:zmq_errno[3]. + +The _zmq_strerror()_ function is provided to translate 0MQ-specific error codes +into error message strings; for details refer to linkzmq:zmq_strerror[3]. + + +MISCELLANEOUS +------------- +The following miscellaneous functions are provided: + +Report 0MQ library version:: + linkzmq:zmq_version[3] + + +LANGUAGE BINDINGS +----------------- +The 0MQ library provides interfaces suitable for calling from programs in any +language; this documentation documents those interfaces as they would be used +by C programmers. The intent is that programmers using 0MQ from other languages +shall refer to this documentation alongside any documentation provided by the +vendor of their language binding. + +Language bindings ($$C++$$, Python, PHP, Ruby, Java and more) are provided by +members of the 0MQ community and pointers can be found on the 0MQ website. + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com>, +Martin Lucina <martin@lucina.net>, and Pieter Hintjens <ph@imatix.com>. + + +RESOURCES +--------- +Main web site: <http://www.zeromq.org/> + +Report bugs to the 0MQ development mailing list: <zeromq-dev@lists.zeromq.org> + + +COPYING +------- +Free use of this software is granted under the terms of the GNU Lesser General +Public License (LGPL). For details see the files `COPYING` and `COPYING.LESSER` +included with the 0MQ distribution. diff --git a/doc/zmq_bind.3 b/doc/zmq_bind.3 new file mode 100644 index 0000000..018ce2f --- /dev/null +++ b/doc/zmq_bind.3 @@ -0,0 +1,210 @@ +'\" t +.\" Title: zmq_bind +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_BIND" "3" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_bind \- accept incoming connections on a socket +.SH "SYNOPSIS" +.sp +\fBint zmq_bind (void \fR\fB\fI*socket\fR\fR\fB, const char \fR\fB\fI*endpoint\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_bind()\fR function binds the \fIsocket\fR to a local \fIendpoint\fR and then accepts incoming connections on that endpoint\&. +.sp +The \fIendpoint\fR is a string consisting of a \fItransport\fR:// followed by an \fIaddress\fR\&. The \fItransport\fR specifies the underlying protocol to use\&. The \fIaddress\fR specifies the transport\-specific address to bind to\&. +.sp +0MQ provides the the following transports: +.PP +\fItcp\fR +.RS 4 +unicast transport using TCP, see +\fBzmq_tcp\fR(7) +.RE +.PP +\fIipc\fR +.RS 4 +local inter\-process communication transport, see +\fBzmq_ipc\fR(7) +.RE +.PP +\fIinproc\fR +.RS 4 +local in\-process (inter\-thread) communication transport, see +\fBzmq_inproc\fR(7) +.RE +.PP +\fIpgm\fR, \fIepgm\fR +.RS 4 +reliable multicast transport using PGM, see +\fBzmq_pgm\fR(7) +.RE +.sp +Every 0MQ socket type except \fIZMQ_PAIR\fR supports one\-to\-many and many\-to\-one semantics\&. The precise semantics depend on the socket type and are defined in \fBzmq_socket\fR(3)\&. +.sp +The \fIipc\fR and \fItcp\fR transports accept wildcard addresses: see \fBzmq_ipc\fR(7) and \fBzmq_tcp\fR(7) for details\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +the address syntax may be different for \fIzmq_bind()\fR and \fIzmq_connect()\fR especially for the \fItcp\fR, \fIpgm\fR and \fIepgm\fR transports\&. +.sp .5v +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +following a \fIzmq_bind()\fR, the socket enters a \fImute\fR state unless or until at least one incoming or outgoing connection is made, at which point the socket enters a \fIready\fR state\&. In the mute state, the socket blocks or drops messages according to the socket type, as defined in \fBzmq_socket\fR(3)\&. By contrast, following a libzmq:zmq_connect[3], the socket enters the \fIready\fR state\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_bind()\fR function returns zero if successful\&. Otherwise it returns \-1 and sets \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +The endpoint supplied is invalid\&. +.RE +.PP +\fBEPROTONOSUPPORT\fR +.RS 4 +The requested +\fItransport\fR +protocol is not supported\&. +.RE +.PP +\fBENOCOMPATPROTO\fR +.RS 4 +The requested +\fItransport\fR +protocol is not compatible with the socket type\&. +.RE +.PP +\fBEADDRINUSE\fR +.RS 4 +The requested +\fIaddress\fR +is already in use\&. +.RE +.PP +\fBEADDRNOTAVAIL\fR +.RS 4 +The requested +\fIaddress\fR +was not local\&. +.RE +.PP +\fBENODEV\fR +.RS 4 +The requested +\fIaddress\fR +specifies a nonexistent interface\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.PP +\fBEMTHREAD\fR +.RS 4 +No I/O thread is available to accomplish the task\&. +.RE +.SH "EXAMPLE" +.PP +\fBBinding a publisher socket to an in-process and a TCP transport\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Create a ZMQ_PUB socket */ +void *socket = zmq_socket (context, ZMQ_PUB); +assert (socket); +/* Bind it to a in\-process transport with the address \*(Aqmy_publisher\*(Aq */ +int rc = zmq_bind (socket, "inproc://my_publisher"); +assert (rc == 0); +/* Bind it to a TCP transport on port 5555 of the \*(Aqeth0\*(Aq interface */ +rc = zmq_bind (socket, "tcp://eth0:5555"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_connect\fR(3) \fBzmq_socket\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[2]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE +.IP " 2." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 3." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_bind.html b/doc/zmq_bind.html new file mode 100644 index 0000000..366146d --- /dev/null +++ b/doc/zmq_bind.html @@ -0,0 +1,954 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_bind(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_bind -
+ accept incoming connections on a socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_bind (void <em>*socket</em>, const char <em>*endpoint</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_bind()</em> function binds the <em>socket</em> to a local <em>endpoint</em> and then
+accepts incoming connections on that endpoint.</p></div>
+<div class="paragraph"><p>The <em>endpoint</em> is a string consisting of a <em>transport</em><tt>://</tt> followed by an
+<em>address</em>. The <em>transport</em> specifies the underlying protocol to use. The
+<em>address</em> specifies the transport-specific address to bind to.</p></div>
+<div class="paragraph"><p>ØMQ provides the the following transports:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<em>tcp</em>
+</dt>
+<dd>
+<p>
+unicast transport using TCP, see <a href="zmq_tcp.html">zmq_tcp(7)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+<em>ipc</em>
+</dt>
+<dd>
+<p>
+local inter-process communication transport, see <a href="zmq_ipc.html">zmq_ipc(7)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+<em>inproc</em>
+</dt>
+<dd>
+<p>
+local in-process (inter-thread) communication transport, see <a href="zmq_inproc.html">zmq_inproc(7)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+<em>pgm</em>, <em>epgm</em>
+</dt>
+<dd>
+<p>
+reliable multicast transport using PGM, see <a href="zmq_pgm.html">zmq_pgm(7)</a>
+</p>
+</dd>
+</dl></div>
+<div class="paragraph"><p>Every ØMQ socket type except <em>ZMQ_PAIR</em> supports one-to-many and many-to-one
+semantics. The precise semantics depend on the socket type and are defined in
+<a href="zmq_socket.html">zmq_socket(3)</a>.</p></div>
+<div class="paragraph"><p>The <em>ipc</em> and <em>tcp</em> transports accept wildcard addresses: see <a href="zmq_ipc.html">zmq_ipc(7)</a>
+and <a href="zmq_tcp.html">zmq_tcp(7)</a> for details.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">the address syntax may be different for <em>zmq_bind()</em> and <em>zmq_connect()</em>
+especially for the <em>tcp</em>, <em>pgm</em> and <em>epgm</em> transports.</td>
+</tr></table>
+</div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">following a <em>zmq_bind()</em>, the socket enters a <em>mute</em> state unless or
+until at least one incoming or outgoing connection is made, at which point
+the socket enters a <em>ready</em> state. In the mute state, the socket blocks or
+drops messages according to the socket type, as defined in <a href="zmq_socket.html">zmq_socket(3)</a>.
+By contrast, following a libzmq:zmq_connect[3], the socket enters the <em>ready</em> state.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_bind()</em> function returns zero if successful. Otherwise it returns
+<tt>-1</tt> and sets <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The endpoint supplied is invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EPROTONOSUPPORT</strong>
+</dt>
+<dd>
+<p>
+The requested <em>transport</em> protocol is not supported.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOCOMPATPROTO</strong>
+</dt>
+<dd>
+<p>
+The requested <em>transport</em> protocol is not compatible with the socket type.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EADDRINUSE</strong>
+</dt>
+<dd>
+<p>
+The requested <em>address</em> is already in use.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EADDRNOTAVAIL</strong>
+</dt>
+<dd>
+<p>
+The requested <em>address</em> was not local.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENODEV</strong>
+</dt>
+<dd>
+<p>
+The requested <em>address</em> specifies a nonexistent interface.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EMTHREAD</strong>
+</dt>
+<dd>
+<p>
+No I/O thread is available to accomplish the task.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Binding a publisher socket to an in-process and a TCP transport</div>
+<div class="content">
+<pre><tt>/* Create a ZMQ_PUB socket */
+void *socket = zmq_socket (context, ZMQ_PUB);
+assert (socket);
+/* Bind it to a in-process transport with the address 'my_publisher' */
+int rc = zmq_bind (socket, "inproc://my_publisher");
+assert (rc == 0);
+/* Bind it to a TCP transport on port 5555 of the 'eth0' interface */
+rc = zmq_bind (socket, "tcp://eth0:5555");
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_connect.html">zmq_connect(3)</a>
+<a href="zmq_socket.html">zmq_socket(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>,
+Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-11-14 10:09:14 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_bind.txt b/doc/zmq_bind.txt new file mode 100644 index 0000000..d45ba8c --- /dev/null +++ b/doc/zmq_bind.txt @@ -0,0 +1,102 @@ +zmq_bind(3) +=========== + + +NAME +---- +zmq_bind - accept incoming connections on a socket + + +SYNOPSIS +-------- +*int zmq_bind (void '*socket', const char '*endpoint');* + + +DESCRIPTION +----------- +The _zmq_bind()_ function binds the 'socket' to a local 'endpoint' and then +accepts incoming connections on that endpoint. + +The 'endpoint' is a string consisting of a 'transport'`://` followed by an +'address'. The 'transport' specifies the underlying protocol to use. The +'address' specifies the transport-specific address to bind to. + +0MQ provides the the following transports: + +'tcp':: unicast transport using TCP, see linkzmq:zmq_tcp[7] +'ipc':: local inter-process communication transport, see linkzmq:zmq_ipc[7] +'inproc':: local in-process (inter-thread) communication transport, see linkzmq:zmq_inproc[7] +'pgm', 'epgm':: reliable multicast transport using PGM, see linkzmq:zmq_pgm[7] + +Every 0MQ socket type except 'ZMQ_PAIR' supports one-to-many and many-to-one +semantics. The precise semantics depend on the socket type and are defined in +linkzmq:zmq_socket[3]. + +The 'ipc' and 'tcp' transports accept wildcard addresses: see linkzmq:zmq_ipc[7] +and linkzmq:zmq_tcp[7] for details. + +NOTE: the address syntax may be different for _zmq_bind()_ and _zmq_connect()_ +especially for the 'tcp', 'pgm' and 'epgm' transports. + +NOTE: following a _zmq_bind()_, the socket enters a 'mute' state unless or +until at least one incoming or outgoing connection is made, at which point +the socket enters a 'ready' state. In the mute state, the socket blocks or +drops messages according to the socket type, as defined in linkzmq:zmq_socket[3]. +By contrast, following a libzmq:zmq_connect[3], the socket enters the 'ready' state. + + +RETURN VALUE +------------ +The _zmq_bind()_ function returns zero if successful. Otherwise it returns +`-1` and sets 'errno' to one of the values defined below. + + +ERRORS +------ +*EINVAL*:: +The endpoint supplied is invalid. +*EPROTONOSUPPORT*:: +The requested 'transport' protocol is not supported. +*ENOCOMPATPROTO*:: +The requested 'transport' protocol is not compatible with the socket type. +*EADDRINUSE*:: +The requested 'address' is already in use. +*EADDRNOTAVAIL*:: +The requested 'address' was not local. +*ENODEV*:: +The requested 'address' specifies a nonexistent interface. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. +*EMTHREAD*:: +No I/O thread is available to accomplish the task. + + +EXAMPLE +------- +.Binding a publisher socket to an in-process and a TCP transport +---- +/* Create a ZMQ_PUB socket */ +void *socket = zmq_socket (context, ZMQ_PUB); +assert (socket); +/* Bind it to a in-process transport with the address 'my_publisher' */ +int rc = zmq_bind (socket, "inproc://my_publisher"); +assert (rc == 0); +/* Bind it to a TCP transport on port 5555 of the 'eth0' interface */ +rc = zmq_bind (socket, "tcp://eth0:5555"); +assert (rc == 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_connect[3] +linkzmq:zmq_socket[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com>, +Martin Sustrik <sustrik@250bpm.com> and Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_close.3 b/doc/zmq_close.3 new file mode 100644 index 0000000..63bbbf9 --- /dev/null +++ b/doc/zmq_close.3 @@ -0,0 +1,81 @@ +'\" t +.\" Title: zmq_close +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_CLOSE" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_close \- close 0MQ socket +.SH "SYNOPSIS" +.sp +\fBint zmq_close (void \fR\fB\fI*socket\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_close()\fR function shall destroy the socket referenced by the \fIsocket\fR argument\&. Any outstanding messages physically received from the network but not yet received by the application with \fIzmq_recv()\fR shall be discarded\&. The behaviour for discarding messages sent by the application with \fIzmq_send()\fR but not yet physically transferred to the network depends on the value of the \fIZMQ_LINGER\fR socket option for the specified \fIsocket\fR\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +The default setting of \fIZMQ_LINGER\fR does not discard unsent messages; this behaviour may cause the application to block when calling \fIzmq_term()\fR\&. For details refer to \fBzmq_setsockopt\fR(3) and \fBzmq_term\fR(3)\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_close()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.SH "SEE ALSO" +.sp +\fBzmq_socket\fR(3) \fBzmq_term\fR(3) \fBzmq_setsockopt\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_close.html b/doc/zmq_close.html new file mode 100644 index 0000000..9e41f61 --- /dev/null +++ b/doc/zmq_close.html @@ -0,0 +1,823 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_close(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_close -
+ close 0MQ socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_close (void <em>*socket</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_close()</em> function shall destroy the socket referenced by the <em>socket</em>
+argument. Any outstanding messages physically received from the network but not
+yet received by the application with <em>zmq_recv()</em> shall be discarded. The
+behaviour for discarding messages sent by the application with <em>zmq_send()</em> but
+not yet physically transferred to the network depends on the value of the
+<em>ZMQ_LINGER</em> socket option for the specified <em>socket</em>.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">The default setting of <em>ZMQ_LINGER</em> does not discard unsent messages;
+this behaviour may cause the application to block when calling <em>zmq_term()</em>.
+For details refer to <a href="zmq_setsockopt.html">zmq_setsockopt(3)</a> and <a href="zmq_term.html">zmq_term(3)</a>.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_close()</em> function shall return zero if successful. Otherwise it shall
+return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_socket.html">zmq_socket(3)</a>
+<a href="zmq_term.html">zmq_term(3)</a>
+<a href="zmq_setsockopt.html">zmq_setsockopt(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_close.txt b/doc/zmq_close.txt new file mode 100644 index 0000000..47f9bb2 --- /dev/null +++ b/doc/zmq_close.txt @@ -0,0 +1,52 @@ +zmq_close(3) +============ + + +NAME +---- +zmq_close - close 0MQ socket + + +SYNOPSIS +-------- +*int zmq_close (void '*socket');* + + +DESCRIPTION +----------- +The _zmq_close()_ function shall destroy the socket referenced by the 'socket' +argument. Any outstanding messages physically received from the network but not +yet received by the application with _zmq_recv()_ shall be discarded. The +behaviour for discarding messages sent by the application with _zmq_send()_ but +not yet physically transferred to the network depends on the value of the +_ZMQ_LINGER_ socket option for the specified 'socket'. + +NOTE: The default setting of _ZMQ_LINGER_ does not discard unsent messages; +this behaviour may cause the application to block when calling _zmq_term()_. +For details refer to linkzmq:zmq_setsockopt[3] and linkzmq:zmq_term[3]. + + +RETURN VALUE +------------ +The _zmq_close()_ function shall return zero if successful. Otherwise it shall +return `-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +*ENOTSOCK*:: +The provided 'socket' was invalid. + + +SEE ALSO +-------- +linkzmq:zmq_socket[3] +linkzmq:zmq_term[3] +linkzmq:zmq_setsockopt[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_connect.3 b/doc/zmq_connect.3 new file mode 100644 index 0000000..6c0a832 --- /dev/null +++ b/doc/zmq_connect.3 @@ -0,0 +1,187 @@ +'\" t +.\" Title: zmq_connect +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_CONNECT" "3" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_connect \- create outgoing connection from socket +.SH "SYNOPSIS" +.sp +\fBint zmq_connect (void \fR\fB\fI*socket\fR\fR\fB, const char \fR\fB\fI*endpoint\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_connect()\fR function connects the \fIsocket\fR to an \fIendpoint\fR and then accepts incoming connections on that endpoint\&. +.sp +The \fIendpoint\fR is a string consisting of a \fItransport\fR:// followed by an \fIaddress\fR\&. The \fItransport\fR specifies the underlying protocol to use\&. The \fIaddress\fR specifies the transport\-specific address to connect to\&. +.sp +0MQ provides the the following transports: +.PP +\fItcp\fR +.RS 4 +unicast transport using TCP, see +\fBzmq_tcp\fR(7) +.RE +.PP +\fIipc\fR +.RS 4 +local inter\-process communication transport, see +\fBzmq_ipc\fR(7) +.RE +.PP +\fIinproc\fR +.RS 4 +local in\-process (inter\-thread) communication transport, see +\fBzmq_inproc\fR(7) +.RE +.PP +\fIpgm\fR, \fIepgm\fR +.RS 4 +reliable multicast transport using PGM, see +\fBzmq_pgm\fR(7) +.RE +.sp +Every 0MQ socket type except \fIZMQ_PAIR\fR supports one\-to\-many and many\-to\-one semantics\&. The precise semantics depend on the socket type and are defined in \fBzmq_socket\fR(3)\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +for most transports and socket types the connection is not performed immediately but as needed by 0MQ\&. Thus a successful call to \fIzmq_connect()\fR does not mean that the connection was or could actually be established\&. Because of this, for most transports and socket types the order in which a \fIserver\fR socket is bound and a \fIclient\fR socket is connected to it does not matter\&. The first exception is when using the inproc:// transport: you must call \fIzmq_bind()\fR before calling \fIzmq_connect()\fR\&. The second exception are \fIZMQ_PAIR\fR sockets, which do not automatically reconnect to endpoints\&. +.sp .5v +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +following a \fIzmq_connect()\fR, the socket enters its normal \fIready\fR state\&. By contrast, following a \fIzmq_bind()\fR alone, the socket enters a \fImute\fR state in which the socket blocks or drops messages according to the socket type, as defined in \fBzmq_socket\fR(3)\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_connect()\fR function returns zero if successful\&. Otherwise it returns \-1 and sets \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +The endpoint supplied is invalid\&. +.RE +.PP +\fBEPROTONOSUPPORT\fR +.RS 4 +The requested +\fItransport\fR +protocol is not supported\&. +.RE +.PP +\fBENOCOMPATPROTO\fR +.RS 4 +The requested +\fItransport\fR +protocol is not compatible with the socket type\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.PP +\fBEMTHREAD\fR +.RS 4 +No I/O thread is available to accomplish the task\&. +.RE +.SH "EXAMPLE" +.PP +\fBConnecting a subscriber socket to an in-process and a TCP transport\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Create a ZMQ_SUB socket */ +void *socket = zmq_socket (context, ZMQ_SUB); +assert (socket); +/* Connect it to an in\-process transport with the address \*(Aqmy_publisher\*(Aq */ +int rc = zmq_connect (socket, "inproc://my_publisher"); +assert (rc == 0); +/* Connect it to the host server001, port 5555 using a TCP transport */ +rc = zmq_connect (socket, "tcp://server001:5555"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_bind\fR(3) \fBzmq_socket\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[2]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE +.IP " 2." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 3." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_connect.html b/doc/zmq_connect.html new file mode 100644 index 0000000..1ab0da0 --- /dev/null +++ b/doc/zmq_connect.html @@ -0,0 +1,933 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_connect(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_connect -
+ create outgoing connection from socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_connect (void <em>*socket</em>, const char <em>*endpoint</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_connect()</em> function connects the <em>socket</em> to an <em>endpoint</em> and then
+accepts incoming connections on that endpoint.</p></div>
+<div class="paragraph"><p>The <em>endpoint</em> is a string consisting of a <em>transport</em><tt>://</tt> followed by an
+<em>address</em>. The <em>transport</em> specifies the underlying protocol to use. The
+<em>address</em> specifies the transport-specific address to connect to.</p></div>
+<div class="paragraph"><p>ØMQ provides the the following transports:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<em>tcp</em>
+</dt>
+<dd>
+<p>
+unicast transport using TCP, see <a href="zmq_tcp.html">zmq_tcp(7)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+<em>ipc</em>
+</dt>
+<dd>
+<p>
+local inter-process communication transport, see <a href="zmq_ipc.html">zmq_ipc(7)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+<em>inproc</em>
+</dt>
+<dd>
+<p>
+local in-process (inter-thread) communication transport, see <a href="zmq_inproc.html">zmq_inproc(7)</a>
+</p>
+</dd>
+<dt class="hdlist1">
+<em>pgm</em>, <em>epgm</em>
+</dt>
+<dd>
+<p>
+reliable multicast transport using PGM, see <a href="zmq_pgm.html">zmq_pgm(7)</a>
+</p>
+</dd>
+</dl></div>
+<div class="paragraph"><p>Every ØMQ socket type except <em>ZMQ_PAIR</em> supports one-to-many and many-to-one
+semantics. The precise semantics depend on the socket type and are defined in
+<a href="zmq_socket.html">zmq_socket(3)</a>.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">for most transports and socket types the connection is not performed
+immediately but as needed by ØMQ. Thus a successful call to <em>zmq_connect()</em>
+does not mean that the connection was or could actually be established.
+Because of this, for most transports and socket types the order in which
+a <em>server</em> socket is bound and a <em>client</em> socket is connected to it does not
+matter. The first exception is when using the inproc:// transport: you must
+call <em>zmq_bind()</em> before calling <em>zmq_connect()</em>. The second exception are
+<em>ZMQ_PAIR</em> sockets, which do not automatically reconnect to endpoints.</td>
+</tr></table>
+</div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">following a <em>zmq_connect()</em>, the socket enters its normal <em>ready</em> state.
+By contrast, following a <em>zmq_bind()</em> alone, the socket enters a <em>mute</em> state
+in which the socket blocks or drops messages according to the socket type, as
+defined in <a href="zmq_socket.html">zmq_socket(3)</a>.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_connect()</em> function returns zero if successful. Otherwise it returns
+<tt>-1</tt> and sets <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The endpoint supplied is invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EPROTONOSUPPORT</strong>
+</dt>
+<dd>
+<p>
+The requested <em>transport</em> protocol is not supported.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOCOMPATPROTO</strong>
+</dt>
+<dd>
+<p>
+The requested <em>transport</em> protocol is not compatible with the socket type.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EMTHREAD</strong>
+</dt>
+<dd>
+<p>
+No I/O thread is available to accomplish the task.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Connecting a subscriber socket to an in-process and a TCP transport</div>
+<div class="content">
+<pre><tt>/* Create a ZMQ_SUB socket */
+void *socket = zmq_socket (context, ZMQ_SUB);
+assert (socket);
+/* Connect it to an in-process transport with the address 'my_publisher' */
+int rc = zmq_connect (socket, "inproc://my_publisher");
+assert (rc == 0);
+/* Connect it to the host server001, port 5555 using a TCP transport */
+rc = zmq_connect (socket, "tcp://server001:5555");
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_bind.html">zmq_bind(3)</a>
+<a href="zmq_socket.html">zmq_socket(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>,
+Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-11-14 10:09:14 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_connect.txt b/doc/zmq_connect.txt new file mode 100644 index 0000000..8028e38 --- /dev/null +++ b/doc/zmq_connect.txt @@ -0,0 +1,98 @@ +zmq_connect(3) +============== + + +NAME +---- +zmq_connect - create outgoing connection from socket + + +SYNOPSIS +-------- +*int zmq_connect (void '*socket', const char '*endpoint');* + + +DESCRIPTION +----------- +The _zmq_connect()_ function connects the 'socket' to an 'endpoint' and then +accepts incoming connections on that endpoint. + +The 'endpoint' is a string consisting of a 'transport'`://` followed by an +'address'. The 'transport' specifies the underlying protocol to use. The +'address' specifies the transport-specific address to connect to. + +0MQ provides the the following transports: + +'tcp':: unicast transport using TCP, see linkzmq:zmq_tcp[7] +'ipc':: local inter-process communication transport, see linkzmq:zmq_ipc[7] +'inproc':: local in-process (inter-thread) communication transport, see linkzmq:zmq_inproc[7] +'pgm', 'epgm':: reliable multicast transport using PGM, see linkzmq:zmq_pgm[7] + +Every 0MQ socket type except 'ZMQ_PAIR' supports one-to-many and many-to-one +semantics. The precise semantics depend on the socket type and are defined in +linkzmq:zmq_socket[3]. + +NOTE: for most transports and socket types the connection is not performed +immediately but as needed by 0MQ. Thus a successful call to _zmq_connect()_ +does not mean that the connection was or could actually be established. +Because of this, for most transports and socket types the order in which +a 'server' socket is bound and a 'client' socket is connected to it does not +matter. The first exception is when using the inproc:// transport: you must +call _zmq_bind()_ before calling _zmq_connect()_. The second exception are +_ZMQ_PAIR_ sockets, which do not automatically reconnect to endpoints. + +NOTE: following a _zmq_connect()_, the socket enters its normal 'ready' state. +By contrast, following a _zmq_bind()_ alone, the socket enters a 'mute' state +in which the socket blocks or drops messages according to the socket type, as +defined in linkzmq:zmq_socket[3]. + + +RETURN VALUE +------------ +The _zmq_connect()_ function returns zero if successful. Otherwise it returns +`-1` and sets 'errno' to one of the values defined below. + + +ERRORS +------ +*EINVAL*:: +The endpoint supplied is invalid. +*EPROTONOSUPPORT*:: +The requested 'transport' protocol is not supported. +*ENOCOMPATPROTO*:: +The requested 'transport' protocol is not compatible with the socket type. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. +*EMTHREAD*:: +No I/O thread is available to accomplish the task. + + +EXAMPLE +------- +.Connecting a subscriber socket to an in-process and a TCP transport +---- +/* Create a ZMQ_SUB socket */ +void *socket = zmq_socket (context, ZMQ_SUB); +assert (socket); +/* Connect it to an in-process transport with the address 'my_publisher' */ +int rc = zmq_connect (socket, "inproc://my_publisher"); +assert (rc == 0); +/* Connect it to the host server001, port 5555 using a TCP transport */ +rc = zmq_connect (socket, "tcp://server001:5555"); +assert (rc == 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_bind[3] +linkzmq:zmq_socket[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com>, +Martin Sustrik <sustrik@250bpm.com> and Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_ctx_destroy.3 b/doc/zmq_ctx_destroy.3 new file mode 100644 index 0000000..e869bb0 --- /dev/null +++ b/doc/zmq_ctx_destroy.3 @@ -0,0 +1,132 @@ +'\" t +.\" Title: zmq_ctx_destroy +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_CTX_DESTROY" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_ctx_destroy \- destroy a 0MQ context +.SH "SYNOPSIS" +.sp +\fBint zmq_ctx_destroy (void \fR\fB\fI*context\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_ctx_destroy()\fR function shall destroy the 0MQ context \fIcontext\fR\&. +.sp +Context termination is performed in the following steps: +.sp +.RS 4 +.ie n \{\ +\h'-04' 1.\h'+01'\c +.\} +.el \{\ +.sp -1 +.IP " 1." 4.2 +.\} +Any blocking operations currently in progress on sockets open within +\fIcontext\fR +shall return immediately with an error code of ETERM\&. With the exception of +\fIzmq_close()\fR, any further operations on sockets open within +\fIcontext\fR +shall fail with an error code of ETERM\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04' 2.\h'+01'\c +.\} +.el \{\ +.sp -1 +.IP " 2." 4.2 +.\} +After interrupting all blocking calls, +\fIzmq_ctx_destroy()\fR +shall +\fIblock\fR +until the following conditions are satisfied: +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +All sockets open within +\fIcontext\fR +have been closed with +\fIzmq_close()\fR\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +For each socket within +\fIcontext\fR, all messages sent by the application with +\fIzmq_send()\fR +have either been physically transferred to a network peer, or the socket\(cqs linger period set with the +\fIZMQ_LINGER\fR +socket option has expired\&. +.RE +.RE +.sp +For further details regarding socket linger behavior refer to the \fIZMQ_LINGER\fR option in \fBzmq_setsockopt\fR(3)\&. +.sp +This function replaces the deprecated function \fBzmq_term\fR(3)\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_ctx_destroy()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEFAULT\fR +.RS 4 +The provided +\fIcontext\fR +was invalid\&. +.RE +.PP +\fBEINTR\fR +.RS 4 +Termination was interrupted by a signal\&. It can be restarted if needed\&. +.RE +.SH "SEE ALSO" +.sp +\fBzmq\fR(7) \fBzmq_init\fR(3) \fBzmq_close\fR(3) \fBzmq_setsockopt\fR(3) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2> +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_ctx_destroy.html b/doc/zmq_ctx_destroy.html new file mode 100644 index 0000000..910e8d2 --- /dev/null +++ b/doc/zmq_ctx_destroy.html @@ -0,0 +1,850 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_ctx_destroy(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_ctx_destroy -
+ destroy a 0MQ context
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_ctx_destroy (void <em>*context</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_ctx_destroy()</em> function shall destroy the ØMQ context <em>context</em>.</p></div>
+<div class="paragraph"><p>Context termination is performed in the following steps:</p></div>
+<div class="olist arabic"><ol class="arabic">
+<li>
+<p>
+Any blocking operations currently in progress on sockets open within
+ <em>context</em> shall return immediately with an error code of ETERM. With the
+ exception of <em>zmq_close()</em>, any further operations on sockets open within
+ <em>context</em> shall fail with an error code of ETERM.
+</p>
+</li>
+<li>
+<p>
+After interrupting all blocking calls, <em>zmq_ctx_destroy()</em> shall <em>block</em> until the
+ following conditions are satisfied:
+</p>
+<div class="ulist"><ul>
+<li>
+<p>
+All sockets open within <em>context</em> have been closed with <em>zmq_close()</em>.
+</p>
+</li>
+<li>
+<p>
+For each socket within <em>context</em>, all messages sent by the application
+ with <em>zmq_send()</em> have either been physically transferred to a network
+ peer, or the socket’s linger period set with the <em>ZMQ_LINGER</em> socket
+ option has expired.
+</p>
+</li>
+</ul></div>
+</li>
+</ol></div>
+<div class="paragraph"><p>For further details regarding socket linger behavior refer to the <em>ZMQ_LINGER</em>
+option in <a href="zmq_setsockopt.html">zmq_setsockopt(3)</a>.</p></div>
+<div class="paragraph"><p>This function replaces the deprecated function <a href="zmq_term.html">zmq_term(3)</a>.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_ctx_destroy()</em> function shall return zero if successful. Otherwise
+it shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EFAULT</strong>
+</dt>
+<dd>
+<p>
+The provided <em>context</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINTR</strong>
+</dt>
+<dd>
+<p>
+Termination was interrupted by a signal. It can be restarted if needed.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq.html">zmq(7)</a>
+<a href="zmq_init.html">zmq_init(3)</a>
+<a href="zmq_close.html">zmq_close(3)</a>
+<a href="zmq_setsockopt.html">zmq_setsockopt(3)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>></p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_ctx_destroy.txt b/doc/zmq_ctx_destroy.txt new file mode 100644 index 0000000..640b6b8 --- /dev/null +++ b/doc/zmq_ctx_destroy.txt @@ -0,0 +1,66 @@ +zmq_ctx_destroy(3) +================== + + +NAME +---- +zmq_ctx_destroy - destroy a 0MQ context + + +SYNOPSIS +-------- +*int zmq_ctx_destroy (void '*context');* + + +DESCRIPTION +----------- +The _zmq_ctx_destroy()_ function shall destroy the 0MQ context 'context'. + +Context termination is performed in the following steps: + +1. Any blocking operations currently in progress on sockets open within + 'context' shall return immediately with an error code of ETERM. With the + exception of _zmq_close()_, any further operations on sockets open within + 'context' shall fail with an error code of ETERM. + +2. After interrupting all blocking calls, _zmq_ctx_destroy()_ shall _block_ until the + following conditions are satisfied: + + * All sockets open within 'context' have been closed with _zmq_close()_. + + * For each socket within 'context', all messages sent by the application + with _zmq_send()_ have either been physically transferred to a network + peer, or the socket's linger period set with the _ZMQ_LINGER_ socket + option has expired. + +For further details regarding socket linger behavior refer to the _ZMQ_LINGER_ +option in linkzmq:zmq_setsockopt[3]. + +This function replaces the deprecated function linkzmq:zmq_term[3]. + + +RETURN VALUE +------------ +The _zmq_ctx_destroy()_ function shall return zero if successful. Otherwise +it shall return `-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +*EFAULT*:: +The provided 'context' was invalid. +*EINTR*:: +Termination was interrupted by a signal. It can be restarted if needed. + + +SEE ALSO +-------- +linkzmq:zmq[7] +linkzmq:zmq_init[3] +linkzmq:zmq_close[3] +linkzmq:zmq_setsockopt[3] + + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com> diff --git a/doc/zmq_ctx_get.3 b/doc/zmq_ctx_get.3 new file mode 100644 index 0000000..7da96f3 --- /dev/null +++ b/doc/zmq_ctx_get.3 @@ -0,0 +1,85 @@ +'\" t +.\" Title: zmq_ctx_get +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_CTX_GET" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_ctx_get \- get context options +.SH "SYNOPSIS" +.sp +\fBint zmq_ctx_get (void \fR\fB\fI*context\fR\fR\fB, int \fR\fB\fIoption_name\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_ctx_get()\fR function shall return the option specified by the \fIoption_name\fR argument\&. +.sp +The \fIzmq_ctx_get()\fR function accepts the following option names: +.SS "ZMQ_IO_THREADS: Get number of I/O threads" +.sp +The \fIZMQ_IO_THREADS\fR argument returns the size of the 0MQ thread pool for this context\&. +.SS "ZMQ_MAX_SOCKETS: Set maximum number of sockets" +.sp +The \fIZMQ_MAX_SOCKETS\fR argument returns the maximum number of sockets allowed for this context\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_ctx_get()\fR function returns a value of 0 or greater if successful\&. Otherwise it returns \-1 and sets \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +The requested option +\fIoption_name\fR +is unknown\&. +.RE +.SH "EXAMPLE" +.PP +\fBSetting a limit on the number of sockets\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +void *context = zmq_ctx_new (); +zmq_ctx_get (context, ZMQ_MAX_SOCKETS, 256); +int max_sockets = zmq_ctx_get (context, ZMQ_MAX_SOCKETS); +assert (max_sockets == 256); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_ctx_set\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2> +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_ctx_get.html b/doc/zmq_ctx_get.html new file mode 100644 index 0000000..9d8da10 --- /dev/null +++ b/doc/zmq_ctx_get.html @@ -0,0 +1,831 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<div id="header">
+<h1>
+zmq_ctx_get(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_ctx_get -
+ get context options
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_ctx_get (void <em>*context</em>, int <em>option_name</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_ctx_get()</em> function shall return the option specified by the
+<em>option_name</em> argument.</p></div>
+<div class="paragraph"><p>The <em>zmq_ctx_get()</em> function accepts the following option names:</p></div>
+<div class="sect2">
+<h3 id="_zmq_io_threads_get_number_of_i_o_threads">ZMQ_IO_THREADS: Get number of I/O threads</h3>
+<div class="paragraph"><p>The <em>ZMQ_IO_THREADS</em> argument returns the size of the ØMQ thread pool
+for this context.</p></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_max_sockets_set_maximum_number_of_sockets">ZMQ_MAX_SOCKETS: Set maximum number of sockets</h3>
+<div class="paragraph"><p>The <em>ZMQ_MAX_SOCKETS</em> argument returns the maximum number of sockets
+allowed for this context.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_ctx_get()</em> function returns a value of 0 or greater if successful.
+Otherwise it returns <tt>-1</tt> and sets <em>errno</em> to one of the values defined
+below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The requested option <em>option_name</em> is unknown.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Setting a limit on the number of sockets</div>
+<div class="content">
+<pre><tt>void *context = zmq_ctx_new ();
+zmq_ctx_get (context, ZMQ_MAX_SOCKETS, 256);
+int max_sockets = zmq_ctx_get (context, ZMQ_MAX_SOCKETS);
+assert (max_sockets == 256);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_ctx_set.html">zmq_ctx_set(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>></p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_ctx_get.txt b/doc/zmq_ctx_get.txt new file mode 100644 index 0000000..a6b3614 --- /dev/null +++ b/doc/zmq_ctx_get.txt @@ -0,0 +1,67 @@ +zmq_ctx_get(3) +============== + + +NAME +---- + +zmq_ctx_get - get context options + + +SYNOPSIS +-------- +*int zmq_ctx_get (void '*context', int 'option_name');* + + +DESCRIPTION +----------- +The _zmq_ctx_get()_ function shall return the option specified by the +'option_name' argument. + +The _zmq_ctx_get()_ function accepts the following option names: + + +ZMQ_IO_THREADS: Get number of I/O threads +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_IO_THREADS' argument returns the size of the 0MQ thread pool +for this context. + +ZMQ_MAX_SOCKETS: Set maximum number of sockets +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_MAX_SOCKETS' argument returns the maximum number of sockets +allowed for this context. + + +RETURN VALUE +------------ +The _zmq_ctx_get()_ function returns a value of 0 or greater if successful. +Otherwise it returns `-1` and sets 'errno' to one of the values defined +below. + + +ERRORS +------ +*EINVAL*:: +The requested option _option_name_ is unknown. + + +EXAMPLE +------- +.Setting a limit on the number of sockets +---- +void *context = zmq_ctx_new (); +zmq_ctx_get (context, ZMQ_MAX_SOCKETS, 256); +int max_sockets = zmq_ctx_get (context, ZMQ_MAX_SOCKETS); +assert (max_sockets == 256); +---- + + +SEE ALSO +-------- +linkzmq:zmq_ctx_set[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com> diff --git a/doc/zmq_ctx_new.3 b/doc/zmq_ctx_new.3 new file mode 100644 index 0000000..4a80ff4 --- /dev/null +++ b/doc/zmq_ctx_new.3 @@ -0,0 +1,61 @@ +'\" t +.\" Title: zmq_ctx_new +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_CTX_NEW" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_ctx_new \- create new 0MQ context +.SH "SYNOPSIS" +.sp +\fBvoid *zmq_ctx_new ();\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_ctx_new()\fR function creates a new 0MQ \fIcontext\fR\&. +.sp +This function replaces the deprecated function \fBzmq_init\fR(3)\&. +.PP +\fBThread safety\fR. A 0MQ +\fIcontext\fR +is thread safe and may be shared among as many application threads as necessary, without any additional locking required on the part of the caller\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_ctx_new()\fR function shall return an opaque handle to the newly created \fIcontext\fR if successful\&. Otherwise it shall return NULL and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.sp +No error values are defined for this function\&. +.SH "SEE ALSO" +.sp +\fBzmq\fR(7) \fBzmq_ctx_set\fR(3) \fBzmq_ctx_get\fR(3) \fBzmq_ctx_destroy\fR(3) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2> +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_ctx_new.html b/doc/zmq_ctx_new.html new file mode 100644 index 0000000..589081a --- /dev/null +++ b/doc/zmq_ctx_new.html @@ -0,0 +1,803 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_ctx_new(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_ctx_new -
+ create new 0MQ context
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>void *zmq_ctx_new ();</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_ctx_new()</em> function creates a new ØMQ <em>context</em>.</p></div>
+<div class="paragraph"><p>This function replaces the deprecated function <a href="zmq_init.html">zmq_init(3)</a>.</p></div>
+<div class="paragraph"><div class="title">Thread safety</div><p>A ØMQ <em>context</em> is thread safe and may be shared among as many application
+threads as necessary, without any additional locking required on the part of
+the caller.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_ctx_new()</em> function shall return an opaque handle to the newly created
+<em>context</em> if successful. Otherwise it shall return NULL and set <em>errno</em> to one
+of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>No error values are defined for this function.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq.html">zmq(7)</a>
+<a href="zmq_ctx_set.html">zmq_ctx_set(3)</a>
+<a href="zmq_ctx_get.html">zmq_ctx_get(3)</a>
+<a href="zmq_ctx_destroy.html">zmq_ctx_destroy(3)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>></p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_ctx_new.txt b/doc/zmq_ctx_new.txt new file mode 100644 index 0000000..cd1bbca --- /dev/null +++ b/doc/zmq_ctx_new.txt @@ -0,0 +1,49 @@ +zmq_ctx_new(3) +============== + + +NAME +---- +zmq_ctx_new - create new 0MQ context + + +SYNOPSIS +-------- +*void *zmq_ctx_new ();* + + +DESCRIPTION +----------- +The _zmq_ctx_new()_ function creates a new 0MQ 'context'. + +This function replaces the deprecated function linkzmq:zmq_init[3]. + +.Thread safety +A 0MQ 'context' is thread safe and may be shared among as many application +threads as necessary, without any additional locking required on the part of +the caller. + + +RETURN VALUE +------------ +The _zmq_ctx_new()_ function shall return an opaque handle to the newly created +'context' if successful. Otherwise it shall return NULL and set 'errno' to one +of the values defined below. + + +ERRORS +------ +No error values are defined for this function. + + +SEE ALSO +-------- +linkzmq:zmq[7] +linkzmq:zmq_ctx_set[3] +linkzmq:zmq_ctx_get[3] +linkzmq:zmq_ctx_destroy[3] + + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com> diff --git a/doc/zmq_ctx_set.3 b/doc/zmq_ctx_set.3 new file mode 100644 index 0000000..aba87f7 --- /dev/null +++ b/doc/zmq_ctx_set.3 @@ -0,0 +1,109 @@ +'\" t +.\" Title: zmq_ctx_set +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_CTX_SET" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_ctx_set \- set context options +.SH "SYNOPSIS" +.sp +\fBint zmq_ctx_set (void \fR\fB\fI*context\fR\fR\fB, int \fR\fB\fIoption_name\fR\fR\fB, int \fR\fB\fIoption_value\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_ctx_set()\fR function shall set the option specified by the \fIoption_name\fR argument to the value of the \fIoption_value\fR argument\&. +.sp +The \fIzmq_ctx_set()\fR function accepts the following options: +.SS "ZMQ_IO_THREADS: Set number of I/O threads" +.sp +The \fIZMQ_IO_THREADS\fR argument specifies the size of the 0MQ thread pool to handle I/O operations\&. If your application is using only the \fIinproc\fR transport for messaging you may set this to zero, otherwise set it to at least one\&. This option only applies before creating any sockets on the context\&. +.TS +tab(:); +lt lt. +T{ +.sp +Default value +T}:T{ +.sp +1 +T} +.TE +.sp 1 +.SS "ZMQ_MAX_SOCKETS: Set maximum number of sockets" +.sp +The \fIZMQ_MAX_SOCKETS\fR argument sets the maximum number of sockets allowed on the context\&. +.TS +tab(:); +lt lt. +T{ +.sp +Default value +T}:T{ +.sp +1024 +T} +.TE +.sp 1 +.SH "RETURN VALUE" +.sp +The \fIzmq_ctx_set()\fR function returns zero if successful\&. Otherwise it returns \-1 and sets \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +The requested option +\fIoption_name\fR +is unknown\&. +.RE +.SH "EXAMPLE" +.PP +\fBSetting a limit on the number of sockets\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +void *context = zmq_ctx_new (); +zmq_ctx_set (context, ZMQ_MAX_SOCKETS, 256); +int max_sockets = zmq_ctx_get (context, ZMQ_MAX_SOCKETS); +assert (max_sockets == 256); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_ctx_get\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2> +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_ctx_set.html b/doc/zmq_ctx_set.html new file mode 100644 index 0000000..c596dd7 --- /dev/null +++ b/doc/zmq_ctx_set.html @@ -0,0 +1,859 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<h1>
+zmq_ctx_set(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_ctx_set -
+ set context options
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_ctx_set (void <em>*context</em>, int <em>option_name</em>, int <em>option_value</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_ctx_set()</em> function shall set the option specified by the
+<em>option_name</em> argument to the value of the <em>option_value</em> argument.</p></div>
+<div class="paragraph"><p>The <em>zmq_ctx_set()</em> function accepts the following options:</p></div>
+<div class="sect2">
+<h3 id="_zmq_io_threads_set_number_of_i_o_threads">ZMQ_IO_THREADS: Set number of I/O threads</h3>
+<div class="paragraph"><p>The <em>ZMQ_IO_THREADS</em> argument specifies the size of the ØMQ thread pool to
+handle I/O operations. If your application is using only the <em>inproc</em>
+transport for messaging you may set this to zero, otherwise set it to at
+least one. This option only applies before creating any sockets on the
+context.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+1
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_max_sockets_set_maximum_number_of_sockets">ZMQ_MAX_SOCKETS: Set maximum number of sockets</h3>
+<div class="paragraph"><p>The <em>ZMQ_MAX_SOCKETS</em> argument sets the maximum number of sockets allowed
+on the context.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+1024
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_ctx_set()</em> function returns zero if successful. Otherwise it
+returns <tt>-1</tt> and sets <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The requested option <em>option_name</em> is unknown.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Setting a limit on the number of sockets</div>
+<div class="content">
+<pre><tt>void *context = zmq_ctx_new ();
+zmq_ctx_set (context, ZMQ_MAX_SOCKETS, 256);
+int max_sockets = zmq_ctx_get (context, ZMQ_MAX_SOCKETS);
+assert (max_sockets == 256);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_ctx_get.html">zmq_ctx_get(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>></p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_ctx_set.txt b/doc/zmq_ctx_set.txt new file mode 100644 index 0000000..88fcc1e --- /dev/null +++ b/doc/zmq_ctx_set.txt @@ -0,0 +1,75 @@ +zmq_ctx_set(3) +============== + + +NAME +---- + +zmq_ctx_set - set context options + + +SYNOPSIS +-------- +*int zmq_ctx_set (void '*context', int 'option_name', int 'option_value');* + + +DESCRIPTION +----------- +The _zmq_ctx_set()_ function shall set the option specified by the +'option_name' argument to the value of the 'option_value' argument. + +The _zmq_ctx_set()_ function accepts the following options: + + +ZMQ_IO_THREADS: Set number of I/O threads +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_IO_THREADS' argument specifies the size of the 0MQ thread pool to +handle I/O operations. If your application is using only the 'inproc' +transport for messaging you may set this to zero, otherwise set it to at +least one. This option only applies before creating any sockets on the +context. + +[horizontal] +Default value:: 1 + +ZMQ_MAX_SOCKETS: Set maximum number of sockets +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_MAX_SOCKETS' argument sets the maximum number of sockets allowed +on the context. + +[horizontal] +Default value:: 1024 + + +RETURN VALUE +------------ +The _zmq_ctx_set()_ function returns zero if successful. Otherwise it +returns `-1` and sets 'errno' to one of the values defined below. + + +ERRORS +------ +*EINVAL*:: +The requested option _option_name_ is unknown. + + +EXAMPLE +------- +.Setting a limit on the number of sockets +---- +void *context = zmq_ctx_new (); +zmq_ctx_set (context, ZMQ_MAX_SOCKETS, 256); +int max_sockets = zmq_ctx_get (context, ZMQ_MAX_SOCKETS); +assert (max_sockets == 256); +---- + + +SEE ALSO +-------- +linkzmq:zmq_ctx_get[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com> diff --git a/doc/zmq_disconnect.3 b/doc/zmq_disconnect.3 new file mode 100644 index 0000000..d42dfbb --- /dev/null +++ b/doc/zmq_disconnect.3 @@ -0,0 +1,108 @@ +'\" t +.\" Title: zmq_disconnect +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_DISCONNECT" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_disconnect \- Disconnect a socket +.SH "SYNOPSIS" +.sp +int zmq_disconnect (void \fI*socket\fR, const char \fI*endpoint\fR); +.SH "DESCRIPTION" +.sp +The \fIzmq_disconnect()\fR function shall disconnect a socket specified by the \fIsocket\fR argument from the endpoint specified by the \fIendpoint\fR argument\&. +.sp +The \fIendpoint\fR argument is as described in \fBzmq_connect\fR(3) +.SH "RETURN VALUE" +.sp +The \fIzmq_disconnect()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +The endpoint supplied is invalid\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.SH "EXAMPLE" +.PP +\fBConnecting a subscriber socket to an in-process and a TCP transport\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Create a ZMQ_SUB socket */ +void *socket = zmq_socket (context, ZMQ_SUB); +assert (socket); +/* Connect it to the host server001, port 5555 using a TCP transport */ +rc = zmq_connect (socket, "tcp://server001:5555"); +assert (rc == 0); +/* Disconnect from the previously connected endpoint */ +rc = zmq_disconnect (socket, "tcp://server001:5555"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_connect\fR(3) \fBzmq_socket\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2> and Ian Barber <\m[blue]\fBian\&.barber@gmail\&.com\fR\m[]\&\s-2\u[3]\d\s+2> +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE +.IP " 3." 4 +ian.barber@gmail.com +.RS 4 +\%mailto:ian.barber@gmail.com +.RE diff --git a/doc/zmq_disconnect.html b/doc/zmq_disconnect.html new file mode 100644 index 0000000..96f860f --- /dev/null +++ b/doc/zmq_disconnect.html @@ -0,0 +1,844 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_disconnect(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_disconnect -
+ Disconnect a socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>int zmq_disconnect (void <em>*socket</em>, const char <em>*endpoint</em>);</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_disconnect()</em> function shall disconnect a socket specified
+by the <em>socket</em> argument from the endpoint specified by the <em>endpoint</em>
+argument.</p></div>
+<div class="paragraph"><p>The <em>endpoint</em> argument is as described in <a href="zmq_connect.html">zmq_connect(3)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_disconnect()</em> function shall return zero if successful. Otherwise it
+shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The endpoint supplied is invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Connecting a subscriber socket to an in-process and a TCP transport</div>
+<div class="content">
+<pre><tt>/* Create a ZMQ_SUB socket */
+void *socket = zmq_socket (context, ZMQ_SUB);
+assert (socket);
+/* Connect it to the host server001, port 5555 using a TCP transport */
+rc = zmq_connect (socket, "tcp://server001:5555");
+assert (rc == 0);
+/* Disconnect from the previously connected endpoint */
+rc = zmq_disconnect (socket, "tcp://server001:5555");
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_connect.html">zmq_connect(3)</a>
+<a href="zmq_socket.html">zmq_socket(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>>,
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>> and Ian Barber <<a href="mailto:ian.barber@gmail.com">ian.barber@gmail.com</a>></p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_disconnect.txt b/doc/zmq_disconnect.txt new file mode 100644 index 0000000..7c8ca4d --- /dev/null +++ b/doc/zmq_disconnect.txt @@ -0,0 +1,65 @@ +zmq_disconnect(3) +================= + + +NAME +---- +zmq_disconnect - Disconnect a socket + + +SYNOPSIS +-------- +int zmq_disconnect (void '*socket', const char '*endpoint'); + + +DESCRIPTION +----------- +The _zmq_disconnect()_ function shall disconnect a socket specified +by the 'socket' argument from the endpoint specified by the 'endpoint' +argument. + +The 'endpoint' argument is as described in linkzmq:zmq_connect[3] + + +RETURN VALUE +------------ +The _zmq_disconnect()_ function shall return zero if successful. Otherwise it +shall return `-1` and set 'errno' to one of the values defined below. + +ERRORS +------ +*EINVAL*:: +The endpoint supplied is invalid. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. + + +EXAMPLE +------- +.Connecting a subscriber socket to an in-process and a TCP transport +---- +/* Create a ZMQ_SUB socket */ +void *socket = zmq_socket (context, ZMQ_SUB); +assert (socket); +/* Connect it to the host server001, port 5555 using a TCP transport */ +rc = zmq_connect (socket, "tcp://server001:5555"); +assert (rc == 0); +/* Disconnect from the previously connected endpoint */ +rc = zmq_disconnect (socket, "tcp://server001:5555"); +assert (rc == 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_connect[3] +linkzmq:zmq_socket[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com>, +Martin Lucina <mato@kotelna.sk> and Ian Barber <ian.barber@gmail.com> diff --git a/doc/zmq_epgm.7 b/doc/zmq_epgm.7 new file mode 100644 index 0000000..57d1d05 --- /dev/null +++ b/doc/zmq_epgm.7 @@ -0,0 +1,216 @@ +'\" t +.\" Title: zmq_pgm +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_PGM" "7" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_pgm \- 0MQ reliable multicast transport using PGM +.SH "SYNOPSIS" +.sp +PGM (Pragmatic General Multicast) is a protocol for reliable multicast transport of data over IP networks\&. +.SH "DESCRIPTION" +.sp +0MQ implements two variants of PGM, the standard protocol where PGM datagrams are layered directly on top of IP datagrams as defined by RFC 3208 (the \fIpgm\fR transport) and "Encapsulated PGM" or EPGM where PGM datagrams are encapsulated inside UDP datagrams (the \fIepgm\fR transport)\&. +.sp +The \fIpgm\fR and \fIepgm\fR transports can only be used with the \fIZMQ_PUB\fR and \fIZMQ_SUB\fR socket types\&. +.sp +Further, PGM sockets are rate limited by default\&. For details, refer to the \fIZMQ_RATE\fR, and \fIZMQ_RECOVERY_IVL\fR options documented in \fBzmq_setsockopt\fR(3)\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +The \fIpgm\fR transport implementation requires access to raw IP sockets\&. Additional privileges may be required on some operating systems for this operation\&. Applications not requiring direct interoperability with other PGM implementations are encouraged to use the \fIepgm\fR transport instead which does not require any special privileges\&. +.sp .5v +.RE +.SH "ADDRESSING" +.sp +A 0MQ endpoint is a string consisting of a \fItransport\fR:// followed by an \fIaddress\fR\&. The \fItransport\fR specifies the underlying protocol to use\&. The \fIaddress\fR specifies the transport\-specific address to connect to\&. +.sp +For the PGM transport, the transport is pgm, and for the EPGM protocol the transport is epgm\&. The meaning of the \fIaddress\fR part is defined below\&. +.SS "Connecting a socket" +.sp +When connecting a socket to a peer address using \fIzmq_connect()\fR with the \fIpgm\fR or \fIepgm\fR transport, the \fIendpoint\fR shall be interpreted as an \fIinterface\fR followed by a semicolon, followed by a \fImulticast address\fR, followed by a colon and a port number\&. +.sp +An \fIinterface\fR may be specified by either of the following: +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The interface name as defined by the operating system\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The primary IPv4 address assigned to the interface, in it\(cqs numeric representation\&. +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +Interface names are not standardised in any way and should be assumed to be arbitrary and platform dependent\&. On Win32 platforms no short interface names exist, thus only the primary IPv4 address may be used to specify an \fIinterface\fR\&. The \fIinterface\fR part can be omitted, in that case the default one will be selected\&. +.sp .5v +.RE +.sp +A \fImulticast address\fR is specified by an IPv4 multicast address in it\(cqs numeric representation\&. +.SH "WIRE FORMAT" +.sp +Consecutive PGM datagrams are interpreted by 0MQ as a single continuous stream of data where 0MQ messages are not necessarily aligned with PGM datagram boundaries and a single 0MQ message may span several PGM datagrams\&. This stream of data consists of 0MQ messages encapsulated in \fIframes\fR as described in \fBzmq_tcp\fR(7)\&. +.SS "PGM datagram payload" +.sp +The following ABNF grammar represents the payload of a single PGM datagram as used by 0MQ: +.sp +.if n \{\ +.RS 4 +.\} +.nf +datagram = (offset data) +offset = 2OCTET +data = *OCTET +.fi +.if n \{\ +.RE +.\} +.sp +In order for late joining consumers to be able to identify message boundaries, each PGM datagram payload starts with a 16\-bit unsigned integer in network byte order specifying either the offset of the first message \fIframe\fR in the datagram or containing the value 0xFFFF if the datagram contains solely an intermediate part of a larger message\&. +.sp +Note that offset specifies where the first message begins rather than the first message part\&. Thus, if there are trailing message parts at the beginning of the packet the offset ignores them and points to first initial message part in the packet\&. +.sp +The following diagram illustrates the layout of a single PGM datagram payload: +.sp +.if n \{\ +.RS 4 +.\} +.nf ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ +| offset (16 bits) | data | ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ +.fi +.if n \{\ +.RE +.\} +.sp +The following diagram further illustrates how three example 0MQ frames are laid out in consecutive PGM datagram payloads: +.sp +.if n \{\ +.RS 4 +.\} +.nf +First datagram payload ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ +| Frame offset | Frame 1 | Frame 2, part 1 | +| 0x0000 | (Message 1) | (Message 2, part 1) | ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ + +Second datagram payload ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ +| Frame offset | Frame 2, part 2 | +| 0xFFFF | (Message 2, part 2) | ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ + +Third datagram payload ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-+ +| Frame offset | Frame 2, final 8 bytes | Frame 3 | +| 0x0008 | (Message 2, final 8 bytes) | (Message 3) | ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-+ +.fi +.if n \{\ +.RE +.\} +.SH "EXAMPLE" +.PP +\fBConnecting a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +// Connecting to the multicast address 239\&.192\&.1\&.1, port 5555, +// using the first Ethernet network interface on Linux +// and the Encapsulated PGM protocol +rc = zmq_connect(socket, "epgm://eth0;239\&.192\&.1\&.1:5555"); +assert (rc == 0); +// Connecting to the multicast address 239\&.192\&.1\&.1, port 5555, +// using the network interface with the address 192\&.168\&.1\&.1 +// and the standard PGM protocol +rc = zmq_connect(socket, "pgm://192\&.168\&.1\&.1;239\&.192\&.1\&.1:5555"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_connect\fR(3) \fBzmq_setsockopt\fR(3) \fBzmq_tcp\fR(7) \fBzmq_ipc\fR(7) \fBzmq_inproc\fR(7) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[2]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE +.IP " 2." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 3." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_epgm.html b/doc/zmq_epgm.html new file mode 100644 index 0000000..849e31a --- /dev/null +++ b/doc/zmq_epgm.html @@ -0,0 +1,932 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_pgm(7) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_pgm -
+ 0MQ reliable multicast transport using PGM
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>PGM (Pragmatic General Multicast) is a protocol for reliable multicast
+transport of data over IP networks.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>ØMQ implements two variants of PGM, the standard protocol where PGM datagrams
+are layered directly on top of IP datagrams as defined by RFC 3208 (the <em>pgm</em>
+transport) and "Encapsulated PGM" or EPGM where PGM datagrams are encapsulated
+inside UDP datagrams (the <em>epgm</em> transport).</p></div>
+<div class="paragraph"><p>The <em>pgm</em> and <em>epgm</em> transports can only be used with the <em>ZMQ_PUB</em> and
+<em>ZMQ_SUB</em> socket types.</p></div>
+<div class="paragraph"><p>Further, PGM sockets are rate limited by default. For details, refer to the
+<em>ZMQ_RATE</em>, and <em>ZMQ_RECOVERY_IVL</em> options documented in
+<a href="zmq_setsockopt.html">zmq_setsockopt(3)</a>.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">The <em>pgm</em> transport implementation requires access to raw IP sockets.
+Additional privileges may be required on some operating systems for this
+operation. Applications not requiring direct interoperability with other PGM
+implementations are encouraged to use the <em>epgm</em> transport instead which does
+not require any special privileges.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_addressing">ADDRESSING</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>A ØMQ endpoint is a string consisting of a <em>transport</em><tt>://</tt> followed by an
+<em>address</em>. The <em>transport</em> specifies the underlying protocol to use. The
+<em>address</em> specifies the transport-specific address to connect to.</p></div>
+<div class="paragraph"><p>For the PGM transport, the transport is <tt>pgm</tt>, and for the EPGM protocol the
+transport is <tt>epgm</tt>. The meaning of the <em>address</em> part is defined below.</p></div>
+<div class="sect2">
+<h3 id="_connecting_a_socket">Connecting a socket</h3>
+<div class="paragraph"><p>When connecting a socket to a peer address using <em>zmq_connect()</em> with the <em>pgm</em>
+or <em>epgm</em> transport, the <em>endpoint</em> shall be interpreted as an <em>interface</em>
+followed by a semicolon, followed by a <em>multicast address</em>, followed by a colon
+and a port number.</p></div>
+<div class="paragraph"><p>An <em>interface</em> may be specified by either of the following:</p></div>
+<div class="ulist"><ul>
+<li>
+<p>
+The interface name as defined by the operating system.
+</p>
+</li>
+<li>
+<p>
+The primary IPv4 address assigned to the interface, in it’s numeric
+ representation.
+</p>
+</li>
+</ul></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">Interface names are not standardised in any way and should be assumed to
+be arbitrary and platform dependent. On Win32 platforms no short interface
+names exist, thus only the primary IPv4 address may be used to specify an
+<em>interface</em>. The <em>interface</em> part can be omitted, in that case the default one
+will be selected.</td>
+</tr></table>
+</div>
+<div class="paragraph"><p>A <em>multicast address</em> is specified by an IPv4 multicast address in it’s numeric
+representation.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_wire_format">WIRE FORMAT</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Consecutive PGM datagrams are interpreted by ØMQ as a single continuous stream
+of data where ØMQ messages are not necessarily aligned with PGM datagram
+boundaries and a single ØMQ message may span several PGM datagrams. This stream
+of data consists of ØMQ messages encapsulated in <em>frames</em> as described in
+<a href="zmq_tcp.html">zmq_tcp(7)</a>.</p></div>
+<div class="sect2">
+<h3 id="_pgm_datagram_payload">PGM datagram payload</h3>
+<div class="paragraph"><p>The following ABNF grammar represents the payload of a single PGM datagram as
+used by ØMQ:</p></div>
+<div class="literalblock">
+<div class="content">
+<pre><tt>datagram = (offset data)
+offset = 2OCTET
+data = *OCTET</tt></pre>
+</div></div>
+<div class="paragraph"><p>In order for late joining consumers to be able to identify message boundaries,
+each PGM datagram payload starts with a 16-bit unsigned integer in network byte
+order specifying either the offset of the first message <em>frame</em> in the datagram
+or containing the value <tt>0xFFFF</tt> if the datagram contains solely an
+intermediate part of a larger message.</p></div>
+<div class="paragraph"><p>Note that offset specifies where the first message begins rather than the first
+message part. Thus, if there are trailing message parts at the beginning of
+the packet the offset ignores them and points to first initial message part
+in the packet.</p></div>
+<div class="paragraph"><p>The following diagram illustrates the layout of a single PGM datagram payload:</p></div>
+<div class="literalblock">
+<div class="content">
+<pre><tt>+------------------+----------------------+
+| offset (16 bits) | data |
++------------------+----------------------+</tt></pre>
+</div></div>
+<div class="paragraph"><p>The following diagram further illustrates how three example ØMQ frames are laid
+out in consecutive PGM datagram payloads:</p></div>
+<div class="literalblock">
+<div class="content">
+<pre><tt>First datagram payload
++--------------+-------------+---------------------+
+| Frame offset | Frame 1 | Frame 2, part 1 |
+| 0x0000 | (Message 1) | (Message 2, part 1) |
++--------------+-------------+---------------------+
+
+Second datagram payload
++--------------+---------------------+
+| Frame offset | Frame 2, part 2 |
+| 0xFFFF | (Message 2, part 2) |
++--------------+---------------------+
+
+Third datagram payload
++--------------+----------------------------+-------------+
+| Frame offset | Frame 2, final 8 bytes | Frame 3 |
+| 0x0008 | (Message 2, final 8 bytes) | (Message 3) |
++--------------+----------------------------+-------------+</tt></pre>
+</div></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Connecting a socket</div>
+<div class="content">
+<pre><tt>// Connecting to the multicast address 239.192.1.1, port 5555,
+// using the first Ethernet network interface on Linux
+// and the Encapsulated PGM protocol
+rc = zmq_connect(socket, "epgm://eth0;239.192.1.1:5555");
+assert (rc == 0);
+// Connecting to the multicast address 239.192.1.1, port 5555,
+// using the network interface with the address 192.168.1.1
+// and the standard PGM protocol
+rc = zmq_connect(socket, "pgm://192.168.1.1;239.192.1.1:5555");
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_connect.html">zmq_connect(3)</a>
+<a href="zmq_setsockopt.html">zmq_setsockopt(3)</a>
+<a href="zmq_tcp.html">zmq_tcp(7)</a>
+<a href="zmq_ipc.html">zmq_ipc(7)</a>
+<a href="zmq_inproc.html">zmq_inproc(7)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>,
+Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-11-14 10:09:14 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_epgm.txt b/doc/zmq_epgm.txt new file mode 100644 index 0000000..7b6b985 --- /dev/null +++ b/doc/zmq_epgm.txt @@ -0,0 +1,162 @@ +zmq_pgm(7) +========== + + +NAME +---- +zmq_pgm - 0MQ reliable multicast transport using PGM + + +SYNOPSIS +-------- +PGM (Pragmatic General Multicast) is a protocol for reliable multicast +transport of data over IP networks. + + +DESCRIPTION +----------- +0MQ implements two variants of PGM, the standard protocol where PGM datagrams +are layered directly on top of IP datagrams as defined by RFC 3208 (the 'pgm' +transport) and "Encapsulated PGM" or EPGM where PGM datagrams are encapsulated +inside UDP datagrams (the 'epgm' transport). + +The 'pgm' and 'epgm' transports can only be used with the 'ZMQ_PUB' and +'ZMQ_SUB' socket types. + +Further, PGM sockets are rate limited by default. For details, refer to the +'ZMQ_RATE', and 'ZMQ_RECOVERY_IVL' options documented in +linkzmq:zmq_setsockopt[3]. + +CAUTION: The 'pgm' transport implementation requires access to raw IP sockets. +Additional privileges may be required on some operating systems for this +operation. Applications not requiring direct interoperability with other PGM +implementations are encouraged to use the 'epgm' transport instead which does +not require any special privileges. + + +ADDRESSING +---------- +A 0MQ endpoint is a string consisting of a 'transport'`://` followed by an +'address'. The 'transport' specifies the underlying protocol to use. The +'address' specifies the transport-specific address to connect to. + +For the PGM transport, the transport is `pgm`, and for the EPGM protocol the +transport is `epgm`. The meaning of the 'address' part is defined below. + + +Connecting a socket +~~~~~~~~~~~~~~~~~~~ +When connecting a socket to a peer address using _zmq_connect()_ with the 'pgm' +or 'epgm' transport, the 'endpoint' shall be interpreted as an 'interface' +followed by a semicolon, followed by a 'multicast address', followed by a colon +and a port number. + +An 'interface' may be specified by either of the following: + +* The interface name as defined by the operating system. +* The primary IPv4 address assigned to the interface, in it's numeric + representation. + +NOTE: Interface names are not standardised in any way and should be assumed to +be arbitrary and platform dependent. On Win32 platforms no short interface +names exist, thus only the primary IPv4 address may be used to specify an +'interface'. The 'interface' part can be omitted, in that case the default one +will be selected. + +A 'multicast address' is specified by an IPv4 multicast address in it's numeric +representation. + + +WIRE FORMAT +----------- +Consecutive PGM datagrams are interpreted by 0MQ as a single continuous stream +of data where 0MQ messages are not necessarily aligned with PGM datagram +boundaries and a single 0MQ message may span several PGM datagrams. This stream +of data consists of 0MQ messages encapsulated in 'frames' as described in +linkzmq:zmq_tcp[7]. + + +PGM datagram payload +~~~~~~~~~~~~~~~~~~~~ +The following ABNF grammar represents the payload of a single PGM datagram as +used by 0MQ: + +.... +datagram = (offset data) +offset = 2OCTET +data = *OCTET +.... + +In order for late joining consumers to be able to identify message boundaries, +each PGM datagram payload starts with a 16-bit unsigned integer in network byte +order specifying either the offset of the first message 'frame' in the datagram +or containing the value `0xFFFF` if the datagram contains solely an +intermediate part of a larger message. + +Note that offset specifies where the first message begins rather than the first +message part. Thus, if there are trailing message parts at the beginning of +the packet the offset ignores them and points to first initial message part +in the packet. + +The following diagram illustrates the layout of a single PGM datagram payload: + +.... ++------------------+----------------------+ +| offset (16 bits) | data | ++------------------+----------------------+ +.... + +The following diagram further illustrates how three example 0MQ frames are laid +out in consecutive PGM datagram payloads: + +.... +First datagram payload ++--------------+-------------+---------------------+ +| Frame offset | Frame 1 | Frame 2, part 1 | +| 0x0000 | (Message 1) | (Message 2, part 1) | ++--------------+-------------+---------------------+ + +Second datagram payload ++--------------+---------------------+ +| Frame offset | Frame 2, part 2 | +| 0xFFFF | (Message 2, part 2) | ++--------------+---------------------+ + +Third datagram payload ++--------------+----------------------------+-------------+ +| Frame offset | Frame 2, final 8 bytes | Frame 3 | +| 0x0008 | (Message 2, final 8 bytes) | (Message 3) | ++--------------+----------------------------+-------------+ +.... + + +EXAMPLE +------- +.Connecting a socket +---- +// Connecting to the multicast address 239.192.1.1, port 5555, +// using the first Ethernet network interface on Linux +// and the Encapsulated PGM protocol +rc = zmq_connect(socket, "epgm://eth0;239.192.1.1:5555"); +assert (rc == 0); +// Connecting to the multicast address 239.192.1.1, port 5555, +// using the network interface with the address 192.168.1.1 +// and the standard PGM protocol +rc = zmq_connect(socket, "pgm://192.168.1.1;239.192.1.1:5555"); +assert (rc == 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_connect[3] +linkzmq:zmq_setsockopt[3] +linkzmq:zmq_tcp[7] +linkzmq:zmq_ipc[7] +linkzmq:zmq_inproc[7] +linkzmq:zmq[7] + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com>, +Martin Sustrik <sustrik@250bpm.com> and Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_errno.3 b/doc/zmq_errno.3 new file mode 100644 index 0000000..6d7d0e0 --- /dev/null +++ b/doc/zmq_errno.3 @@ -0,0 +1,78 @@ +'\" t +.\" Title: zmq_errno +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_ERRNO" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_errno \- retrieve value of errno for the calling thread +.SH "SYNOPSIS" +.sp +\fBint zmq_errno (void);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_errno()\fR function shall retrieve the value of the \fIerrno\fR variable for the calling thread\&. +.sp +The \fIzmq_errno()\fR function is provided to assist users on non\-POSIX systems who are experiencing issues with retrieving the correct value of \fIerrno\fR directly\&. Specifically, users on Win32 systems whose application is using a different C run\-time library from the C run\-time library in use by 0MQ will need to use \fIzmq_errno()\fR for correct operation\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBImportant\fR +.ps -1 +.br +.sp +Users not experiencing issues with retrieving the correct value of \fIerrno\fR should not use this function and should instead access the \fIerrno\fR variable directly\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_errno()\fR function shall return the value of the \fIerrno\fR variable for the calling thread\&. +.SH "ERRORS" +.sp +No errors are defined\&. +.SH "SEE ALSO" +.sp +\fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_errno.html b/doc/zmq_errno.html new file mode 100644 index 0000000..4ad27af --- /dev/null +++ b/doc/zmq_errno.html @@ -0,0 +1,812 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+ }
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+asciidoc.install();
+/*]]>*/
+</script>
+</head>
+<body class="manpage">
+<div id="header">
+<h1>
+zmq_errno(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_errno -
+ retrieve value of errno for the calling thread
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_errno (void);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_errno()</em> function shall retrieve the value of the <em>errno</em> variable for
+the calling thread.</p></div>
+<div class="paragraph"><p>The <em>zmq_errno()</em> function is provided to assist users on non-POSIX systems who
+are experiencing issues with retrieving the correct value of <em>errno</em> directly.
+Specifically, users on Win32 systems whose application is using a different C
+run-time library from the C run-time library in use by ØMQ will need to use
+<em>zmq_errno()</em> for correct operation.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Important</div>
+</td>
+<td class="content">Users not experiencing issues with retrieving the correct value of
+<em>errno</em> should not use this function and should instead access the <em>errno</em>
+variable directly.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_errno()</em> function shall return the value of the <em>errno</em> variable for
+the calling thread.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>No errors are defined.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_errno.txt b/doc/zmq_errno.txt new file mode 100644 index 0000000..f9cf6cb --- /dev/null +++ b/doc/zmq_errno.txt @@ -0,0 +1,50 @@ +zmq_errno(3) +============ + + +NAME +---- +zmq_errno - retrieve value of errno for the calling thread + + +SYNOPSIS +-------- +*int zmq_errno (void);* + + +DESCRIPTION +----------- +The _zmq_errno()_ function shall retrieve the value of the 'errno' variable for +the calling thread. + +The _zmq_errno()_ function is provided to assist users on non-POSIX systems who +are experiencing issues with retrieving the correct value of 'errno' directly. +Specifically, users on Win32 systems whose application is using a different C +run-time library from the C run-time library in use by 0MQ will need to use +_zmq_errno()_ for correct operation. + +IMPORTANT: Users not experiencing issues with retrieving the correct value of +'errno' should not use this function and should instead access the 'errno' +variable directly. + + +RETURN VALUE +------------ +The _zmq_errno()_ function shall return the value of the 'errno' variable for +the calling thread. + + +ERRORS +------ +No errors are defined. + + +SEE ALSO +-------- +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_getsockopt.3 b/doc/zmq_getsockopt.3 new file mode 100644 index 0000000..8445dbc --- /dev/null +++ b/doc/zmq_getsockopt.3 @@ -0,0 +1,1305 @@ +'\" t +.\" Title: zmq_getsockopt +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_GETSOCKOPT" "3" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_getsockopt \- get 0MQ socket options +.SH "SYNOPSIS" +.sp +\fBint zmq_getsockopt (void \fR\fB\fI*socket\fR\fR\fB, int \fR\fB\fIoption_name\fR\fR\fB, void \fR\fB\fI*option_value\fR\fR\fB, size_t \fR\fB\fI*option_len\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_getsockopt()\fR function shall retrieve the value for the option specified by the \fIoption_name\fR argument for the 0MQ socket pointed to by the \fIsocket\fR argument, and store it in the buffer pointed to by the \fIoption_value\fR argument\&. The \fIoption_len\fR argument is the size in bytes of the buffer pointed to by \fIoption_value\fR; upon successful completion \fIzmq_getsockopt()\fR shall modify the \fIoption_len\fR argument to indicate the actual size of the option value stored in the buffer\&. +.sp +The following options can be retrieved with the \fIzmq_getsockopt()\fR function: +.SS "ZMQ_TYPE: Retrieve socket type" +.sp +The \fIZMQ_TYPE\fR option shall retrieve the socket type for the specified \fIsocket\fR\&. The socket type is specified at socket creation time and cannot be modified afterwards\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +N/A +T} +T{ +.sp +Default value +T}:T{ +.sp +N/A +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_RCVMORE: More message data parts to follow" +.sp +The \fIZMQ_RCVMORE\fR option shall return True (1) if the message part last received from the \fIsocket\fR was a data part with more parts to follow\&. If there are no data parts to follow, this option shall return False (0)\&. +.sp +Refer to \fBzmq_send\fR(3) and \fBzmq_recv\fR(3) for a detailed description of multi\-part messages\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +boolean +T} +T{ +.sp +Default value +T}:T{ +.sp +N/A +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_SNDHWM: Retrieves high water mark for outbound messages" +.sp +The \fIZMQ_SNDHWM\fR option shall return the high water mark for outbound messages on the specified \fIsocket\fR\&. The high water mark is a hard limit on the maximum number of outstanding messages 0MQ shall queue in memory for any single peer that the specified \fIsocket\fR is communicating with\&. +.sp +If this limit has been reached the socket shall enter an exceptional state and depending on the socket type, 0MQ shall take appropriate action such as blocking or dropping sent messages\&. Refer to the individual socket descriptions in \fBzmq_socket\fR(3) for details on the exact action taken for each socket type\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +messages +T} +T{ +.sp +Default value +T}:T{ +.sp +1000 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_RCVHWM: Retrieve high water mark for inbound messages" +.sp +The \fIZMQ_RCVHWM\fR option shall return the high water mark for inbound messages on the specified \fIsocket\fR\&. The high water mark is a hard limit on the maximum number of outstanding messages 0MQ shall queue in memory for any single peer that the specified \fIsocket\fR is communicating with\&. +.sp +If this limit has been reached the socket shall enter an exceptional state and depending on the socket type, 0MQ shall take appropriate action such as blocking or dropping sent messages\&. Refer to the individual socket descriptions in \fBzmq_socket\fR(3) for details on the exact action taken for each socket type\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +messages +T} +T{ +.sp +Default value +T}:T{ +.sp +1000 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_AFFINITY: Retrieve I/O thread affinity" +.sp +The \fIZMQ_AFFINITY\fR option shall retrieve the I/O thread affinity for newly created connections on the specified \fIsocket\fR\&. +.sp +Affinity determines which threads from the 0MQ I/O thread pool associated with the socket\(cqs \fIcontext\fR shall handle newly created connections\&. A value of zero specifies no affinity, meaning that work shall be distributed fairly among all 0MQ I/O threads in the thread pool\&. For non\-zero values, the lowest bit corresponds to thread 1, second lowest bit to thread 2 and so on\&. For example, a value of 3 specifies that subsequent connections on \fIsocket\fR shall be handled exclusively by I/O threads 1 and 2\&. +.sp +See also \fBzmq_init\fR(3) for details on allocating the number of I/O threads for a specific \fIcontext\fR\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +uint64_t +T} +T{ +.sp +Option value unit +T}:T{ +.sp +N/A (bitmap) +T} +T{ +.sp +Default value +T}:T{ +.sp +0 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +N/A +T} +.TE +.sp 1 +.SS "ZMQ_IDENTITY: Set socket identity" +.sp +The \fIZMQ_IDENTITY\fR option shall retrieve the identity of the specified \fIsocket\fR\&. Socket identity is used only by request/reply pattern\&. Namely, it can be used in tandem with ROUTER socket to route messages to the peer with specific identity\&. +.sp +Identity should be at least one byte and at most 255 bytes long\&. Identities starting with binary zero are reserved for use by 0MQ infrastructure\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +binary data +T} +T{ +.sp +Option value unit +T}:T{ +.sp +N/A +T} +T{ +.sp +Default value +T}:T{ +.sp +NULL +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_RATE: Retrieve multicast data rate" +.sp +The \fIZMQ_RATE\fR option shall retrieve the maximum send or receive data rate for multicast transports using the specified \fIsocket\fR\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +kilobits per second +T} +T{ +.sp +Default value +T}:T{ +.sp +100 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, when using multicast transports +T} +.TE +.sp 1 +.SS "ZMQ_RECOVERY_IVL: Get multicast recovery interval" +.sp +The \fIZMQ_RECOVERY_IVL\fR option shall retrieve the recovery interval for multicast transports using the specified \fIsocket\fR\&. The recovery interval determines the maximum time in milliseconds that a receiver can be absent from a multicast group before unrecoverable data loss will occur\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +milliseconds +T} +T{ +.sp +Default value +T}:T{ +.sp +10000 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, when using multicast transports +T} +.TE +.sp 1 +.SS "ZMQ_SNDBUF: Retrieve kernel transmit buffer size" +.sp +The \fIZMQ_SNDBUF\fR option shall retrieve the underlying kernel transmit buffer size for the specified \fIsocket\fR\&. A value of zero means that the OS default is in effect\&. For details refer to your operating system documentation for the \fISO_SNDBUF\fR socket option\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +bytes +T} +T{ +.sp +Default value +T}:T{ +.sp +0 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_RCVBUF: Retrieve kernel receive buffer size" +.sp +The \fIZMQ_RCVBUF\fR option shall retrieve the underlying kernel receive buffer size for the specified \fIsocket\fR\&. A value of zero means that the OS default is in effect\&. For details refer to your operating system documentation for the \fISO_RCVBUF\fR socket option\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +bytes +T} +T{ +.sp +Default value +T}:T{ +.sp +0 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_LINGER: Retrieve linger period for socket shutdown" +.sp +The \fIZMQ_LINGER\fR option shall retrieve the linger period for the specified \fIsocket\fR\&. The linger period determines how long pending messages which have yet to be sent to a peer shall linger in memory after a socket is closed with \fBzmq_close\fR(3), and further affects the termination of the socket\(cqs context with \fBzmq_term\fR(3)\&. The following outlines the different behaviours: +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The default value of +\fI\-1\fR +specifies an infinite linger period\&. Pending messages shall not be discarded after a call to +\fIzmq_close()\fR; attempting to terminate the socket\(cqs context with +\fIzmq_term()\fR +shall block until all pending messages have been sent to a peer\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The value of +\fI0\fR +specifies no linger period\&. Pending messages shall be discarded immediately when the socket is closed with +\fIzmq_close()\fR\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +Positive values specify an upper bound for the linger period in milliseconds\&. Pending messages shall not be discarded after a call to +\fIzmq_close()\fR; attempting to terminate the socket\(cqs context with +\fIzmq_term()\fR +shall block until either all pending messages have been sent to a peer, or the linger period expires, after which any pending messages shall be discarded\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +Option value type +T}:T{ +int +T} +T{ +Option value unit +T}:T{ +milliseconds +T} +T{ +Default value +T}:T{ +\-1 (infinite) +T} +T{ +Applicable socket types +T}:T{ +all +T} +.TE +.sp 1 +.RE +.SS "ZMQ_RECONNECT_IVL: Retrieve reconnection interval" +.sp +The \fIZMQ_RECONNECT_IVL\fR option shall retrieve the initial reconnection interval for the specified \fIsocket\fR\&. The reconnection interval is the period 0MQ shall wait between attempts to reconnect disconnected peers when using connection\-oriented transports\&. The value \-1 means no reconnection\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +The reconnection interval may be randomized by 0MQ to prevent reconnection storms in topologies with a large number of peers per socket\&. +.sp .5v +.RE +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +milliseconds +T} +T{ +.sp +Default value +T}:T{ +.sp +100 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, only for connection\-oriented transports +T} +.TE +.sp 1 +.SS "ZMQ_RECONNECT_IVL_MAX: Retrieve maximum reconnection interval" +.sp +The \fIZMQ_RECONNECT_IVL_MAX\fR option shall retrieve the maximum reconnection interval for the specified \fIsocket\fR\&. This is the maximum period 0MQ shall wait between attempts to reconnect\&. On each reconnect attempt, the previous interval shall be doubled untill ZMQ_RECONNECT_IVL_MAX is reached\&. This allows for exponential backoff strategy\&. Default value means no exponential backoff is performed and reconnect interval calculations are only based on ZMQ_RECONNECT_IVL\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +Values less than ZMQ_RECONNECT_IVL will be ignored\&. +.sp .5v +.RE +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +milliseconds +T} +T{ +.sp +Default value +T}:T{ +.sp +0 (only use ZMQ_RECONNECT_IVL) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, only for connection\-oriented transport +T} +.TE +.sp 1 +.SS "ZMQ_BACKLOG: Retrieve maximum length of the queue of outstanding connections" +.sp +The \fIZMQ_BACKLOG\fR option shall retrieve the maximum length of the queue of outstanding peer connections for the specified \fIsocket\fR; this only applies to connection\-oriented transports\&. For details refer to your operating system documentation for the \fIlisten\fR function\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +connections +T} +T{ +.sp +Default value +T}:T{ +.sp +100 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, only for connection\-oriented transports +T} +.TE +.sp 1 +.SS "ZMQ_MAXMSGSIZE: Maximum acceptable inbound message size" +.sp +The option shall retrieve limit for the inbound messages\&. If a peer sends a message larger than ZMQ_MAXMSGSIZE it is disconnected\&. Value of \-1 means \fIno limit\fR\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int64_t +T} +T{ +.sp +Option value unit +T}:T{ +.sp +bytes +T} +T{ +.sp +Default value +T}:T{ +.sp +\-1 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_MULTICAST_HOPS: Maximum network hops for multicast packets" +.sp +The option shall retrieve time\-to\-live used for outbound multicast packets\&. The default of 1 means that the multicast packets don\(cqt leave the local network\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +network hops +T} +T{ +.sp +Default value +T}:T{ +.sp +1 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, when using multicast transports +T} +.TE +.sp 1 +.SS "ZMQ_RCVTIMEO: Maximum time before a socket operation returns with EAGAIN" +.sp +Retrieve the timeout for recv operation on the socket\&. If the value is 0, \fIzmq_recv(3)\fR will return immediately, with a EAGAIN error if there is no message to receive\&. If the value is \-1, it will block until a message is available\&. For all other values, it will wait for a message for that amount of time before returning with an EAGAIN error\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +milliseconds +T} +T{ +.sp +Default value +T}:T{ +.sp +\-1 (infinite) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_SNDTIMEO: Maximum time before a socket operation returns with EAGAIN" +.sp +Retrieve the timeout for send operation on the socket\&. If the value is 0, \fIzmq_send(3)\fR will return immediately, with a EAGAIN error if the message cannot be sent\&. If the value is \-1, it will block until the message is sent\&. For all other values, it will try to send the message for that amount of time before returning with an EAGAIN error\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +milliseconds +T} +T{ +.sp +Default value +T}:T{ +.sp +\-1 (infinite) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_IPV4ONLY: Retrieve IPv4\-only socket override status" +.sp +Retrieve the underlying native socket type\&. A value of 1 will use IPv4 sockets, while the value of 0 will use IPv6 sockets\&. An IPv6 socket lets applications connect to and accept connections from both IPv4 and IPv6 hosts\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +boolean +T} +T{ +.sp +Default value +T}:T{ +.sp +1 (true) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, when using TCP transports\&. +T} +.TE +.sp 1 +.SS "ZMQ_DELAY_ATTACH_ON_CONNECT: Retrieve attach\-on\-connect value" +.sp +Retrieve the state of the attach on connect value\&. If set to 1, will delay the attachment of a pipe on connect until the underlying connection has completed\&. This will cause the socket to block if there are no other connections, but will prevent queues from filling on pipes awaiting connection\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +boolean +T} +T{ +.sp +Default value +T}:T{ +.sp +0 (false) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, primarily when using TCP/IPC transports\&. +T} +.TE +.sp 1 +.SS "ZMQ_FD: Retrieve file descriptor associated with the socket" +.sp +The \fIZMQ_FD\fR option shall retrieve the file descriptor associated with the specified \fIsocket\fR\&. The returned file descriptor can be used to integrate the socket into an existing event loop; the 0MQ library shall signal any pending events on the socket in an \fIedge\-triggered\fR fashion by making the file descriptor become ready for reading\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +The ability to read from the returned file descriptor does not necessarily indicate that messages are available to be read from, or can be written to, the underlying socket; applications must retrieve the actual event state with a subsequent retrieval of the \fIZMQ_EVENTS\fR option\&. +.sp .5v +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +The returned file descriptor is also used internally by the \fIzmq_send\fR and \fIzmq_recv\fR functions\&. 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The default value of \-1 means to skip any overrides and leave it to OS default\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +\-1,>0 +T} +T{ +.sp +Default value +T}:T{ +.sp +\-1 (leave to OS default) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, when using TCP transports\&. +T} +.TE +.sp 1 +.SS "ZMQ_TCP_KEEPALIVE_INTVL: Override TCP_KEEPINTVL socket option" +.sp +Override \fITCP_KEEPINTVL\fR socket option(where supported by OS)\&. The default value of \-1 means to skip any overrides and leave it to OS default\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +\-1,>0 +T} +T{ +.sp +Default value +T}:T{ +.sp +\-1 (leave to OS default) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, when using TCP transports\&. +T} +.TE +.sp 1 +.SH "RETURN VALUE" +.sp +The \fIzmq_getsockopt()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +The requested option +\fIoption_name\fR +is unknown, or the requested +\fIoption_len\fR +or +\fIoption_value\fR +is invalid, or the size of the buffer pointed to by +\fIoption_value\fR, as specified by +\fIoption_len\fR, is insufficient for storing the option value\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.PP +\fBEINTR\fR +.RS 4 +The operation was interrupted by delivery of a signal\&. +.RE +.SH "EXAMPLE" +.PP +\fBRetrieving the high water mark for outgoing messages\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Retrieve high water mark into sndhwm */ +int sndhwm; +size_t sndhwm_size = sizeof (sndhwm); +rc = zmq_getsockopt (socket, ZMQ_SNDHWM, &sndhwm, &sndhwm_size); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_setsockopt\fR(3) \fBzmq_socket\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_getsockopt.html b/doc/zmq_getsockopt.html new file mode 100644 index 0000000..d46b0e3 --- /dev/null +++ b/doc/zmq_getsockopt.html @@ -0,0 +1,2399 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_getsockopt(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_getsockopt -
+ get 0MQ socket options
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_getsockopt (void <em>*socket</em>, int <em>option_name</em>, void <em>*option_value</em>, size_t <em>*option_len</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_getsockopt()</em> function shall retrieve the value for the option
+specified by the <em>option_name</em> argument for the ØMQ socket pointed to by the
+<em>socket</em> argument, and store it in the buffer pointed to by the <em>option_value</em>
+argument. The <em>option_len</em> argument is the size in bytes of the buffer pointed
+to by <em>option_value</em>; upon successful completion <em>zmq_getsockopt()</em> shall
+modify the <em>option_len</em> argument to indicate the actual size of the option
+value stored in the buffer.</p></div>
+<div class="paragraph"><p>The following options can be retrieved with the <em>zmq_getsockopt()</em> function:</p></div>
+<div class="sect2">
+<h3 id="_zmq_type_retrieve_socket_type">ZMQ_TYPE: Retrieve socket type</h3>
+<div class="paragraph"><p>The <em>ZMQ_TYPE</em> option shall retrieve the socket type for the specified
+<em>socket</em>. The socket type is specified at socket creation time and
+cannot be modified afterwards.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rcvmore_more_message_data_parts_to_follow">ZMQ_RCVMORE: More message data parts to follow</h3>
+<div class="paragraph"><p>The <em>ZMQ_RCVMORE</em> option shall return True (1) if the message part last
+received from the <em>socket</em> was a data part with more parts to follow. If there
+are no data parts to follow, this option shall return False (0).</p></div>
+<div class="paragraph"><p>Refer to <a href="zmq_send.html">zmq_send(3)</a> and <a href="zmq_recv.html">zmq_recv(3)</a> for a detailed description
+of multi-part messages.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+boolean
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_sndhwm_retrieves_high_water_mark_for_outbound_messages">ZMQ_SNDHWM: Retrieves high water mark for outbound messages</h3>
+<div class="paragraph"><p>The <em>ZMQ_SNDHWM</em> option shall return the high water mark for outbound messages
+on the specified <em>socket</em>. The high water mark is a hard limit on the maximum
+number of outstanding messages ØMQ shall queue in memory for any single peer
+that the specified <em>socket</em> is communicating with.</p></div>
+<div class="paragraph"><p>If this limit has been reached the socket shall enter an exceptional state and
+depending on the socket type, ØMQ shall take appropriate action such as
+blocking or dropping sent messages. Refer to the individual socket descriptions
+in <a href="zmq_socket.html">zmq_socket(3)</a> for details on the exact action taken for each socket
+type.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+messages
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+1000
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rcvhwm_retrieve_high_water_mark_for_inbound_messages">ZMQ_RCVHWM: Retrieve high water mark for inbound messages</h3>
+<div class="paragraph"><p>The <em>ZMQ_RCVHWM</em> option shall return the high water mark for inbound messages on
+the specified <em>socket</em>. The high water mark is a hard limit on the maximum
+number of outstanding messages ØMQ shall queue in memory for any single peer
+that the specified <em>socket</em> is communicating with.</p></div>
+<div class="paragraph"><p>If this limit has been reached the socket shall enter an exceptional state and
+depending on the socket type, ØMQ shall take appropriate action such as
+blocking or dropping sent messages. Refer to the individual socket descriptions
+in <a href="zmq_socket.html">zmq_socket(3)</a> for details on the exact action taken for each socket
+type.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+messages
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+1000
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_affinity_retrieve_i_o_thread_affinity">ZMQ_AFFINITY: Retrieve I/O thread affinity</h3>
+<div class="paragraph"><p>The <em>ZMQ_AFFINITY</em> option shall retrieve the I/O thread affinity for newly
+created connections on the specified <em>socket</em>.</p></div>
+<div class="paragraph"><p>Affinity determines which threads from the ØMQ I/O thread pool associated with
+the socket’s <em>context</em> shall handle newly created connections. A value of zero
+specifies no affinity, meaning that work shall be distributed fairly among all
+ØMQ I/O threads in the thread pool. For non-zero values, the lowest bit
+corresponds to thread 1, second lowest bit to thread 2 and so on. For example,
+a value of 3 specifies that subsequent connections on <em>socket</em> shall be handled
+exclusively by I/O threads 1 and 2.</p></div>
+<div class="paragraph"><p>See also <a href="zmq_init.html">zmq_init(3)</a> for details on allocating the number of I/O
+threads for a specific <em>context</em>.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+uint64_t
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A (bitmap)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_identity_set_socket_identity">ZMQ_IDENTITY: Set socket identity</h3>
+<div class="paragraph"><p>The <em>ZMQ_IDENTITY</em> option shall retrieve the identity of the specified <em>socket</em>.
+Socket identity is used only by request/reply pattern. Namely, it can be used
+in tandem with ROUTER socket to route messages to the peer with specific
+identity.</p></div>
+<div class="paragraph"><p>Identity should be at least one byte and at most 255 bytes long. Identities
+starting with binary zero are reserved for use by ØMQ infrastructure.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+binary data
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+NULL
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rate_retrieve_multicast_data_rate">ZMQ_RATE: Retrieve multicast data rate</h3>
+<div class="paragraph"><p>The <em>ZMQ_RATE</em> option shall retrieve the maximum send or receive data rate for
+multicast transports using the specified <em>socket</em>.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+kilobits per second
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+100
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using multicast transports
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_recovery_ivl_get_multicast_recovery_interval">ZMQ_RECOVERY_IVL: Get multicast recovery interval</h3>
+<div class="paragraph"><p>The <em>ZMQ_RECOVERY_IVL</em> option shall retrieve the recovery interval for
+multicast transports using the specified <em>socket</em>. The recovery interval
+determines the maximum time in milliseconds that a receiver can be absent from a
+multicast group before unrecoverable data loss will occur.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+10000
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using multicast transports
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_sndbuf_retrieve_kernel_transmit_buffer_size">ZMQ_SNDBUF: Retrieve kernel transmit buffer size</h3>
+<div class="paragraph"><p>The <em>ZMQ_SNDBUF</em> option shall retrieve the underlying kernel transmit buffer
+size for the specified <em>socket</em>. A value of zero means that the OS default is
+in effect. For details refer to your operating system documentation for the
+<em>SO_SNDBUF</em> socket option.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+bytes
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rcvbuf_retrieve_kernel_receive_buffer_size">ZMQ_RCVBUF: Retrieve kernel receive buffer size</h3>
+<div class="paragraph"><p>The <em>ZMQ_RCVBUF</em> option shall retrieve the underlying kernel receive buffer
+size for the specified <em>socket</em>. A value of zero means that the OS default is
+in effect. For details refer to your operating system documentation for the
+<em>SO_RCVBUF</em> socket option.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+bytes
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_linger_retrieve_linger_period_for_socket_shutdown">ZMQ_LINGER: Retrieve linger period for socket shutdown</h3>
+<div class="paragraph"><p>The <em>ZMQ_LINGER</em> option shall retrieve the linger period for the specified
+<em>socket</em>. The linger period determines how long pending messages which have
+yet to be sent to a peer shall linger in memory after a socket is closed with
+<a href="zmq_close.html">zmq_close(3)</a>, and further affects the termination of the socket’s
+context with <a href="zmq_term.html">zmq_term(3)</a>. The following outlines the different
+behaviours:</p></div>
+<div class="ulist"><ul>
+<li>
+<p>
+The default value of <em>-1</em> specifies an infinite linger period. Pending
+ messages shall not be discarded after a call to <em>zmq_close()</em>; attempting to
+ terminate the socket’s context with <em>zmq_term()</em> shall block until all
+ pending messages have been sent to a peer.
+</p>
+</li>
+<li>
+<p>
+The value of <em>0</em> specifies no linger period. Pending messages shall be
+ discarded immediately when the socket is closed with <em>zmq_close()</em>.
+</p>
+</li>
+<li>
+<p>
+Positive values specify an upper bound for the linger period in milliseconds.
+ Pending messages shall not be discarded after a call to <em>zmq_close()</em>;
+ attempting to terminate the socket’s context with <em>zmq_term()</em> shall block
+ until either all pending messages have been sent to a peer, or the linger
+ period expires, after which any pending messages shall be discarded.
+</p>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (infinite)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_reconnect_ivl_retrieve_reconnection_interval">ZMQ_RECONNECT_IVL: Retrieve reconnection interval</h3>
+<div class="paragraph"><p>The <em>ZMQ_RECONNECT_IVL</em> option shall retrieve the initial reconnection interval
+for the specified <em>socket</em>. The reconnection interval is the period ØMQ shall
+wait between attempts to reconnect disconnected peers when using
+connection-oriented transports. The value -1 means no reconnection.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">The reconnection interval may be randomized by ØMQ to prevent
+reconnection storms in topologies with a large number of peers per socket.</td>
+</tr></table>
+</div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+100
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, only for connection-oriented transports
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_reconnect_ivl_max_retrieve_maximum_reconnection_interval">ZMQ_RECONNECT_IVL_MAX: Retrieve maximum reconnection interval</h3>
+<div class="paragraph"><p>The <em>ZMQ_RECONNECT_IVL_MAX</em> option shall retrieve the maximum reconnection
+interval for the specified <em>socket</em>. This is the maximum period ØMQ shall wait
+between attempts to reconnect. On each reconnect attempt, the previous interval
+shall be doubled untill ZMQ_RECONNECT_IVL_MAX is reached. This allows for
+exponential backoff strategy. Default value means no exponential backoff is
+performed and reconnect interval calculations are only based on
+ZMQ_RECONNECT_IVL.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">Values less than ZMQ_RECONNECT_IVL will be ignored.</td>
+</tr></table>
+</div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0 (only use ZMQ_RECONNECT_IVL)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, only for connection-oriented transport
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_backlog_retrieve_maximum_length_of_the_queue_of_outstanding_connections">ZMQ_BACKLOG: Retrieve maximum length of the queue of outstanding connections</h3>
+<div class="paragraph"><p>The <em>ZMQ_BACKLOG</em> option shall retrieve the maximum length of the queue of
+outstanding peer connections for the specified <em>socket</em>; this only applies to
+connection-oriented transports. For details refer to your operating system
+documentation for the <em>listen</em> function.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+connections
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+100
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, only for connection-oriented transports
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_maxmsgsize_maximum_acceptable_inbound_message_size">ZMQ_MAXMSGSIZE: Maximum acceptable inbound message size</h3>
+<div class="paragraph"><p>The option shall retrieve limit for the inbound messages. If a peer sends
+a message larger than ZMQ_MAXMSGSIZE it is disconnected. Value of -1 means
+<em>no limit</em>.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int64_t
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+bytes
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_multicast_hops_maximum_network_hops_for_multicast_packets">ZMQ_MULTICAST_HOPS: Maximum network hops for multicast packets</h3>
+<div class="paragraph"><p>The option shall retrieve time-to-live used for outbound multicast packets.
+The default of 1 means that the multicast packets don’t leave the local network.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+network hops
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+1
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using multicast transports
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rcvtimeo_maximum_time_before_a_socket_operation_returns_with_eagain">ZMQ_RCVTIMEO: Maximum time before a socket operation returns with EAGAIN</h3>
+<div class="paragraph"><p>Retrieve the timeout for recv operation on the socket. If the value is <tt>0</tt>,
+<em>zmq_recv(3)</em> will return immediately, with a EAGAIN error if there is no
+message to receive. If the value is <tt>-1</tt>, it will block until a message is
+available. For all other values, it will wait for a message for that amount
+of time before returning with an EAGAIN error.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (infinite)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_sndtimeo_maximum_time_before_a_socket_operation_returns_with_eagain">ZMQ_SNDTIMEO: Maximum time before a socket operation returns with EAGAIN</h3>
+<div class="paragraph"><p>Retrieve the timeout for send operation on the socket. If the value is <tt>0</tt>,
+<em>zmq_send(3)</em> will return immediately, with a EAGAIN error if the message
+cannot be sent. If the value is <tt>-1</tt>, it will block until the message is sent.
+For all other values, it will try to send the message for that amount of time
+before returning with an EAGAIN error.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (infinite)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_ipv4only_retrieve_ipv4_only_socket_override_status">ZMQ_IPV4ONLY: Retrieve IPv4-only socket override status</h3>
+<div class="paragraph"><p>Retrieve the underlying native socket type. A value of <tt>1</tt> will use IPv4
+sockets, while the value of <tt>0</tt> will use IPv6 sockets. An IPv6 socket
+lets applications connect to and accept connections from both IPv4 and IPv6
+hosts.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+boolean
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+1 (true)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using TCP transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_delay_attach_on_connect_retrieve_attach_on_connect_value">ZMQ_DELAY_ATTACH_ON_CONNECT: Retrieve attach-on-connect value</h3>
+<div class="paragraph"><p>Retrieve the state of the attach on connect value. If set to <tt>1</tt>, will delay the
+attachment of a pipe on connect until the underlying connection has completed.
+This will cause the socket to block if there are no other connections, but will
+prevent queues from filling on pipes awaiting connection.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+boolean
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0 (false)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, primarily when using TCP/IPC transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_fd_retrieve_file_descriptor_associated_with_the_socket">ZMQ_FD: Retrieve file descriptor associated with the socket</h3>
+<div class="paragraph"><p>The <em>ZMQ_FD</em> option shall retrieve the file descriptor associated with the
+specified <em>socket</em>. The returned file descriptor can be used to integrate the
+socket into an existing event loop; the ØMQ library shall signal any pending
+events on the socket in an <em>edge-triggered</em> fashion by making the file
+descriptor become ready for reading.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">The ability to read from the returned file descriptor does not
+necessarily indicate that messages are available to be read from, or can be
+written to, the underlying socket; applications must retrieve the actual event
+state with a subsequent retrieval of the <em>ZMQ_EVENTS</em> option.</td>
+</tr></table>
+</div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">The returned file descriptor is also used internally by the <em>zmq_send</em>
+and <em>zmq_recv</em> functions. As the descriptor is edge triggered, applications
+must update the state of <em>ZMQ_EVENTS</em> after each invocation of <em>zmq_send</em>
+or <em>zmq_recv</em>.To be more explicit: after calling <em>zmq_send</em> the socket may
+become readable (and vice versa) without triggering a read event on the
+file descriptor.</td>
+</tr></table>
+</div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">The returned file descriptor is intended for use with a <em>poll</em> or
+similar system call only. Applications must never attempt to read or write data
+to it directly, neither should they try to close it.</td>
+</tr></table>
+</div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int on POSIX systems, SOCKET on Windows
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_events_retrieve_socket_event_state">ZMQ_EVENTS: Retrieve socket event state</h3>
+<div class="paragraph"><p>The <em>ZMQ_EVENTS</em> option shall retrieve the event state for the specified
+<em>socket</em>. The returned value is a bit mask constructed by OR’ing a combination
+of the following event flags:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ZMQ_POLLIN</strong>
+</dt>
+<dd>
+<p>
+Indicates that at least one message may be received from the specified socket
+without blocking.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ZMQ_POLLOUT</strong>
+</dt>
+<dd>
+<p>
+Indicates that at least one message may be sent to the specified socket without
+blocking.
+</p>
+</dd>
+</dl></div>
+<div class="paragraph"><p>The combination of a file descriptor returned by the <em>ZMQ_FD</em> option being
+ready for reading but no actual events returned by a subsequent retrieval of
+the <em>ZMQ_EVENTS</em> option is valid; applications should simply ignore this case
+and restart their polling operation/event loop.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A (flags)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_last_endpoint_retrieve_the_last_endpoint_set">ZMQ_LAST_ENDPOINT: Retrieve the last endpoint set</h3>
+<div class="paragraph"><p>The <em>ZMQ_LAST_ENDPOINT</em> option shall retrieve the last endpoint bound for
+TCP and IPC transports. The returned value will be a string in the form of
+a ZMQ DSN. Note that if the TCP host is INADDR_ANY, indicated by a *, then
+the returned address will be 0.0.0.0 (for IPv4).</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+character string
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+NULL
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when binding TCP or IPC transports
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_tcp_keepalive_override_so_keepalive_socket_option">ZMQ_TCP_KEEPALIVE: Override SO_KEEPALIVE socket option</h3>
+<div class="paragraph"><p>Override <em>SO_KEEPALIVE</em> socket option(where supported by OS).
+The default value of <tt>-1</tt> means to skip any overrides and leave it to OS default.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1,0,1
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (leave to OS default)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using TCP transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_tcp_keepalive_idle_override_tcp_keepcnt_or_tcp_keepalive_on_some_os">ZMQ_TCP_KEEPALIVE_IDLE: Override TCP_KEEPCNT(or TCP_KEEPALIVE on some OS)</h3>
+<div class="paragraph"><p>Override <em>TCP_KEEPCNT</em>(or <em>TCP_KEEPALIVE</em> on some OS) socket option(where supported by OS).
+The default value of <tt>-1</tt> means to skip any overrides and leave it to OS default.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1,>0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (leave to OS default)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using TCP transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_tcp_keepalive_cnt_override_tcp_keepcnt_socket_option">ZMQ_TCP_KEEPALIVE_CNT: Override TCP_KEEPCNT socket option</h3>
+<div class="paragraph"><p>Override <em>TCP_KEEPCNT</em> socket option(where supported by OS).
+The default value of <tt>-1</tt> means to skip any overrides and leave it to OS default.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1,>0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (leave to OS default)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using TCP transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_tcp_keepalive_intvl_override_tcp_keepintvl_socket_option">ZMQ_TCP_KEEPALIVE_INTVL: Override TCP_KEEPINTVL socket option</h3>
+<div class="paragraph"><p>Override <em>TCP_KEEPINTVL</em> socket option(where supported by OS).
+The default value of <tt>-1</tt> means to skip any overrides and leave it to OS default.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1,>0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (leave to OS default)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using TCP transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_getsockopt()</em> function shall return zero if successful. Otherwise it
+shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The requested option <em>option_name</em> is unknown, or the requested <em>option_len</em> or
+<em>option_value</em> is invalid, or the size of the buffer pointed to by
+<em>option_value</em>, as specified by <em>option_len</em>, is insufficient for storing the
+option value.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINTR</strong>
+</dt>
+<dd>
+<p>
+The operation was interrupted by delivery of a signal.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Retrieving the high water mark for outgoing messages</div>
+<div class="content">
+<pre><tt>/* Retrieve high water mark into sndhwm */
+int sndhwm;
+size_t sndhwm_size = sizeof (sndhwm);
+rc = zmq_getsockopt (socket, ZMQ_SNDHWM, &sndhwm, &sndhwm_size);
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_setsockopt.html">zmq_setsockopt(3)</a>
+<a href="zmq_socket.html">zmq_socket(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-11-14 10:09:14 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_getsockopt.txt b/doc/zmq_getsockopt.txt new file mode 100644 index 0000000..0876ac8 --- /dev/null +++ b/doc/zmq_getsockopt.txt @@ -0,0 +1,516 @@ +zmq_getsockopt(3) +================= + + +NAME +---- + +zmq_getsockopt - get 0MQ socket options + + +SYNOPSIS +-------- +*int zmq_getsockopt (void '*socket', int 'option_name', void '*option_value', size_t '*option_len');* + + +DESCRIPTION +----------- +The _zmq_getsockopt()_ function shall retrieve the value for the option +specified by the 'option_name' argument for the 0MQ socket pointed to by the +'socket' argument, and store it in the buffer pointed to by the 'option_value' +argument. The 'option_len' argument is the size in bytes of the buffer pointed +to by 'option_value'; upon successful completion _zmq_getsockopt()_ shall +modify the 'option_len' argument to indicate the actual size of the option +value stored in the buffer. + +The following options can be retrieved with the _zmq_getsockopt()_ function: + + +ZMQ_TYPE: Retrieve socket type +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_TYPE' option shall retrieve the socket type for the specified +'socket'. The socket type is specified at socket creation time and +cannot be modified afterwards. + +[horizontal] +Option value type:: int +Option value unit:: N/A +Default value:: N/A +Applicable socket types:: all + + +ZMQ_RCVMORE: More message data parts to follow +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RCVMORE' option shall return True (1) if the message part last +received from the 'socket' was a data part with more parts to follow. If there +are no data parts to follow, this option shall return False (0). + +Refer to linkzmq:zmq_send[3] and linkzmq:zmq_recv[3] for a detailed description +of multi-part messages. + +[horizontal] +Option value type:: int +Option value unit:: boolean +Default value:: N/A +Applicable socket types:: all + + +ZMQ_SNDHWM: Retrieves high water mark for outbound messages +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_SNDHWM' option shall return the high water mark for outbound messages +on the specified 'socket'. The high water mark is a hard limit on the maximum +number of outstanding messages 0MQ shall queue in memory for any single peer +that the specified 'socket' is communicating with. + +If this limit has been reached the socket shall enter an exceptional state and +depending on the socket type, 0MQ shall take appropriate action such as +blocking or dropping sent messages. Refer to the individual socket descriptions +in linkzmq:zmq_socket[3] for details on the exact action taken for each socket +type. + +[horizontal] +Option value type:: int +Option value unit:: messages +Default value:: 1000 +Applicable socket types:: all + + +ZMQ_RCVHWM: Retrieve high water mark for inbound messages +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RCVHWM' option shall return the high water mark for inbound messages on +the specified 'socket'. The high water mark is a hard limit on the maximum +number of outstanding messages 0MQ shall queue in memory for any single peer +that the specified 'socket' is communicating with. + +If this limit has been reached the socket shall enter an exceptional state and +depending on the socket type, 0MQ shall take appropriate action such as +blocking or dropping sent messages. Refer to the individual socket descriptions +in linkzmq:zmq_socket[3] for details on the exact action taken for each socket +type. + +[horizontal] +Option value type:: int +Option value unit:: messages +Default value:: 1000 +Applicable socket types:: all + + +ZMQ_AFFINITY: Retrieve I/O thread affinity +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_AFFINITY' option shall retrieve the I/O thread affinity for newly +created connections on the specified 'socket'. + +Affinity determines which threads from the 0MQ I/O thread pool associated with +the socket's _context_ shall handle newly created connections. A value of zero +specifies no affinity, meaning that work shall be distributed fairly among all +0MQ I/O threads in the thread pool. For non-zero values, the lowest bit +corresponds to thread 1, second lowest bit to thread 2 and so on. For example, +a value of 3 specifies that subsequent connections on 'socket' shall be handled +exclusively by I/O threads 1 and 2. + +See also linkzmq:zmq_init[3] for details on allocating the number of I/O +threads for a specific _context_. + +[horizontal] +Option value type:: uint64_t +Option value unit:: N/A (bitmap) +Default value:: 0 +Applicable socket types:: N/A + + +ZMQ_IDENTITY: Set socket identity +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_IDENTITY' option shall retrieve the identity of the specified 'socket'. +Socket identity is used only by request/reply pattern. Namely, it can be used +in tandem with ROUTER socket to route messages to the peer with specific +identity. + +Identity should be at least one byte and at most 255 bytes long. Identities +starting with binary zero are reserved for use by 0MQ infrastructure. + +[horizontal] +Option value type:: binary data +Option value unit:: N/A +Default value:: NULL +Applicable socket types:: all + + +ZMQ_RATE: Retrieve multicast data rate +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RATE' option shall retrieve the maximum send or receive data rate for +multicast transports using the specified 'socket'. + +[horizontal] +Option value type:: int +Option value unit:: kilobits per second +Default value:: 100 +Applicable socket types:: all, when using multicast transports + + +ZMQ_RECOVERY_IVL: Get multicast recovery interval +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RECOVERY_IVL' option shall retrieve the recovery interval for +multicast transports using the specified 'socket'. The recovery interval +determines the maximum time in milliseconds that a receiver can be absent from a +multicast group before unrecoverable data loss will occur. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: 10000 +Applicable socket types:: all, when using multicast transports + + +ZMQ_SNDBUF: Retrieve kernel transmit buffer size +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_SNDBUF' option shall retrieve the underlying kernel transmit buffer +size for the specified 'socket'. A value of zero means that the OS default is +in effect. For details refer to your operating system documentation for the +'SO_SNDBUF' socket option. + +[horizontal] +Option value type:: int +Option value unit:: bytes +Default value:: 0 +Applicable socket types:: all + + +ZMQ_RCVBUF: Retrieve kernel receive buffer size +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RCVBUF' option shall retrieve the underlying kernel receive buffer +size for the specified 'socket'. A value of zero means that the OS default is +in effect. For details refer to your operating system documentation for the +'SO_RCVBUF' socket option. + +[horizontal] +Option value type:: int +Option value unit:: bytes +Default value:: 0 +Applicable socket types:: all + + +ZMQ_LINGER: Retrieve linger period for socket shutdown +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_LINGER' option shall retrieve the linger period for the specified +'socket'. The linger period determines how long pending messages which have +yet to be sent to a peer shall linger in memory after a socket is closed with +linkzmq:zmq_close[3], and further affects the termination of the socket's +context with linkzmq:zmq_term[3]. The following outlines the different +behaviours: + +* The default value of '-1' specifies an infinite linger period. Pending + messages shall not be discarded after a call to _zmq_close()_; attempting to + terminate the socket's context with _zmq_term()_ shall block until all + pending messages have been sent to a peer. + +* The value of '0' specifies no linger period. Pending messages shall be + discarded immediately when the socket is closed with _zmq_close()_. + +* Positive values specify an upper bound for the linger period in milliseconds. + Pending messages shall not be discarded after a call to _zmq_close()_; + attempting to terminate the socket's context with _zmq_term()_ shall block + until either all pending messages have been sent to a peer, or the linger + period expires, after which any pending messages shall be discarded. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: -1 (infinite) +Applicable socket types:: all + + +ZMQ_RECONNECT_IVL: Retrieve reconnection interval +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RECONNECT_IVL' option shall retrieve the initial reconnection interval +for the specified 'socket'. The reconnection interval is the period 0MQ shall +wait between attempts to reconnect disconnected peers when using +connection-oriented transports. The value -1 means no reconnection. + +NOTE: The reconnection interval may be randomized by 0MQ to prevent +reconnection storms in topologies with a large number of peers per socket. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: 100 +Applicable socket types:: all, only for connection-oriented transports + + +ZMQ_RECONNECT_IVL_MAX: Retrieve maximum reconnection interval +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RECONNECT_IVL_MAX' option shall retrieve the maximum reconnection +interval for the specified 'socket'. This is the maximum period 0MQ shall wait +between attempts to reconnect. On each reconnect attempt, the previous interval +shall be doubled untill ZMQ_RECONNECT_IVL_MAX is reached. This allows for +exponential backoff strategy. Default value means no exponential backoff is +performed and reconnect interval calculations are only based on +ZMQ_RECONNECT_IVL. + +NOTE: Values less than ZMQ_RECONNECT_IVL will be ignored. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: 0 (only use ZMQ_RECONNECT_IVL) +Applicable socket types:: all, only for connection-oriented transport + + +ZMQ_BACKLOG: Retrieve maximum length of the queue of outstanding connections +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_BACKLOG' option shall retrieve the maximum length of the queue of +outstanding peer connections for the specified 'socket'; this only applies to +connection-oriented transports. For details refer to your operating system +documentation for the 'listen' function. + +[horizontal] +Option value type:: int +Option value unit:: connections +Default value:: 100 +Applicable socket types:: all, only for connection-oriented transports + + +ZMQ_MAXMSGSIZE: Maximum acceptable inbound message size +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The option shall retrieve limit for the inbound messages. If a peer sends +a message larger than ZMQ_MAXMSGSIZE it is disconnected. Value of -1 means +'no limit'. + +[horizontal] +Option value type:: int64_t +Option value unit:: bytes +Default value:: -1 +Applicable socket types:: all + + +ZMQ_MULTICAST_HOPS: Maximum network hops for multicast packets +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The option shall retrieve time-to-live used for outbound multicast packets. +The default of 1 means that the multicast packets don't leave the local network. + +[horizontal] +Option value type:: int +Option value unit:: network hops +Default value:: 1 +Applicable socket types:: all, when using multicast transports + + +ZMQ_RCVTIMEO: Maximum time before a socket operation returns with EAGAIN +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Retrieve the timeout for recv operation on the socket. If the value is `0`, +_zmq_recv(3)_ will return immediately, with a EAGAIN error if there is no +message to receive. If the value is `-1`, it will block until a message is +available. For all other values, it will wait for a message for that amount +of time before returning with an EAGAIN error. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: -1 (infinite) +Applicable socket types:: all + + +ZMQ_SNDTIMEO: Maximum time before a socket operation returns with EAGAIN +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Retrieve the timeout for send operation on the socket. If the value is `0`, +_zmq_send(3)_ will return immediately, with a EAGAIN error if the message +cannot be sent. If the value is `-1`, it will block until the message is sent. +For all other values, it will try to send the message for that amount of time +before returning with an EAGAIN error. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: -1 (infinite) +Applicable socket types:: all + + +ZMQ_IPV4ONLY: Retrieve IPv4-only socket override status +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Retrieve the underlying native socket type. A value of `1` will use IPv4 +sockets, while the value of `0` will use IPv6 sockets. An IPv6 socket +lets applications connect to and accept connections from both IPv4 and IPv6 +hosts. + +[horizontal] +Option value type:: int +Option value unit:: boolean +Default value:: 1 (true) +Applicable socket types:: all, when using TCP transports. + + +ZMQ_DELAY_ATTACH_ON_CONNECT: Retrieve attach-on-connect value +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Retrieve the state of the attach on connect value. If set to `1`, will delay the +attachment of a pipe on connect until the underlying connection has completed. +This will cause the socket to block if there are no other connections, but will +prevent queues from filling on pipes awaiting connection. + +[horizontal] +Option value type:: int +Option value unit:: boolean +Default value:: 0 (false) +Applicable socket types:: all, primarily when using TCP/IPC transports. + + +ZMQ_FD: Retrieve file descriptor associated with the socket +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_FD' option shall retrieve the file descriptor associated with the +specified 'socket'. The returned file descriptor can be used to integrate the +socket into an existing event loop; the 0MQ library shall signal any pending +events on the socket in an _edge-triggered_ fashion by making the file +descriptor become ready for reading. + +NOTE: The ability to read from the returned file descriptor does not +necessarily indicate that messages are available to be read from, or can be +written to, the underlying socket; applications must retrieve the actual event +state with a subsequent retrieval of the 'ZMQ_EVENTS' option. + +NOTE: The returned file descriptor is also used internally by the 'zmq_send' +and 'zmq_recv' functions. As the descriptor is edge triggered, applications +must update the state of 'ZMQ_EVENTS' after each invocation of 'zmq_send' +or 'zmq_recv'.To be more explicit: after calling 'zmq_send' the socket may +become readable (and vice versa) without triggering a read event on the +file descriptor. + +CAUTION: The returned file descriptor is intended for use with a 'poll' or +similar system call only. Applications must never attempt to read or write data +to it directly, neither should they try to close it. + +[horizontal] +Option value type:: int on POSIX systems, SOCKET on Windows +Option value unit:: N/A +Default value:: N/A +Applicable socket types:: all + + +ZMQ_EVENTS: Retrieve socket event state +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENTS' option shall retrieve the event state for the specified +'socket'. The returned value is a bit mask constructed by OR'ing a combination +of the following event flags: + +*ZMQ_POLLIN*:: +Indicates that at least one message may be received from the specified socket +without blocking. + +*ZMQ_POLLOUT*:: +Indicates that at least one message may be sent to the specified socket without +blocking. + +The combination of a file descriptor returned by the 'ZMQ_FD' option being +ready for reading but no actual events returned by a subsequent retrieval of +the 'ZMQ_EVENTS' option is valid; applications should simply ignore this case +and restart their polling operation/event loop. + +[horizontal] +Option value type:: int +Option value unit:: N/A (flags) +Default value:: N/A +Applicable socket types:: all + + +ZMQ_LAST_ENDPOINT: Retrieve the last endpoint set +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_LAST_ENDPOINT' option shall retrieve the last endpoint bound for +TCP and IPC transports. The returned value will be a string in the form of +a ZMQ DSN. Note that if the TCP host is INADDR_ANY, indicated by a *, then +the returned address will be 0.0.0.0 (for IPv4). + +[horizontal] +Option value type:: character string +Option value unit:: N/A +Default value:: NULL +Applicable socket types:: all, when binding TCP or IPC transports + + +ZMQ_TCP_KEEPALIVE: Override SO_KEEPALIVE socket option +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Override 'SO_KEEPALIVE' socket option(where supported by OS). +The default value of `-1` means to skip any overrides and leave it to OS default. + +[horizontal] +Option value type:: int +Option value unit:: -1,0,1 +Default value:: -1 (leave to OS default) +Applicable socket types:: all, when using TCP transports. + + +ZMQ_TCP_KEEPALIVE_IDLE: Override TCP_KEEPCNT(or TCP_KEEPALIVE on some OS) +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Override 'TCP_KEEPCNT'(or 'TCP_KEEPALIVE' on some OS) socket option(where supported by OS). +The default value of `-1` means to skip any overrides and leave it to OS default. + +[horizontal] +Option value type:: int +Option value unit:: -1,>0 +Default value:: -1 (leave to OS default) +Applicable socket types:: all, when using TCP transports. + + +ZMQ_TCP_KEEPALIVE_CNT: Override TCP_KEEPCNT socket option +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Override 'TCP_KEEPCNT' socket option(where supported by OS). +The default value of `-1` means to skip any overrides and leave it to OS default. + +[horizontal] +Option value type:: int +Option value unit:: -1,>0 +Default value:: -1 (leave to OS default) +Applicable socket types:: all, when using TCP transports. + + +ZMQ_TCP_KEEPALIVE_INTVL: Override TCP_KEEPINTVL socket option +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Override 'TCP_KEEPINTVL' socket option(where supported by OS). +The default value of `-1` means to skip any overrides and leave it to OS default. + +[horizontal] +Option value type:: int +Option value unit:: -1,>0 +Default value:: -1 (leave to OS default) +Applicable socket types:: all, when using TCP transports. + +RETURN VALUE +------------ +The _zmq_getsockopt()_ function shall return zero if successful. Otherwise it +shall return `-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +*EINVAL*:: +The requested option _option_name_ is unknown, or the requested _option_len_ or +_option_value_ is invalid, or the size of the buffer pointed to by +_option_value_, as specified by _option_len_, is insufficient for storing the +option value. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. +*EINTR*:: +The operation was interrupted by delivery of a signal. + + +EXAMPLE +------- +.Retrieving the high water mark for outgoing messages +---- +/* Retrieve high water mark into sndhwm */ +int sndhwm; +size_t sndhwm_size = sizeof (sndhwm); +rc = zmq_getsockopt (socket, ZMQ_SNDHWM, &sndhwm, &sndhwm_size); +assert (rc == 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_setsockopt[3] +linkzmq:zmq_socket[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_init.3 b/doc/zmq_init.3 new file mode 100644 index 0000000..0c2f39f --- /dev/null +++ b/doc/zmq_init.3 @@ -0,0 +1,73 @@ +'\" t +.\" Title: zmq_init +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_INIT" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_init \- initialise 0MQ context +.SH "SYNOPSIS" +.sp +\fBvoid *zmq_init (int \fR\fB\fIio_threads\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_init()\fR function initialises a 0MQ \fIcontext\fR\&. +.sp +The \fIio_threads\fR argument specifies the size of the 0MQ thread pool to handle I/O operations\&. If your application is using only the \fIinproc\fR transport for messaging you may set this to zero, otherwise set it to at least one\&. +.PP +\fBThread safety\fR. A 0MQ +\fIcontext\fR +is thread safe and may be shared among as many application threads as necessary, without any additional locking required on the part of the caller\&. +.sp +This function is deprecated by \fBzmq_ctx_new\fR(3)\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_init()\fR function shall return an opaque handle to the initialised \fIcontext\fR if successful\&. Otherwise it shall return NULL and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +An invalid number of +\fIio_threads\fR +was requested\&. +.RE +.SH "SEE ALSO" +.sp +\fBzmq\fR(7) \fBzmq_term\fR(3) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_init.html b/doc/zmq_init.html new file mode 100644 index 0000000..10c69c4 --- /dev/null +++ b/doc/zmq_init.html @@ -0,0 +1,814 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
+ "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_init(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_init -
+ initialise 0MQ context
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>void *zmq_init (int <em>io_threads</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_init()</em> function initialises a ØMQ <em>context</em>.</p></div>
+<div class="paragraph"><p>The <em>io_threads</em> argument specifies the size of the ØMQ thread pool to handle
+I/O operations. If your application is using only the <em>inproc</em> transport for
+messaging you may set this to zero, otherwise set it to at least one.</p></div>
+<div class="paragraph"><div class="title">Thread safety</div><p>A ØMQ <em>context</em> is thread safe and may be shared among as many application
+threads as necessary, without any additional locking required on the part of
+the caller.</p></div>
+<div class="paragraph"><p>This function is deprecated by <a href="zmq_ctx_new.html">zmq_ctx_new(3)</a>.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_init()</em> function shall return an opaque handle to the initialised
+<em>context</em> if successful. Otherwise it shall return NULL and set <em>errno</em> to one
+of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+An invalid number of <em>io_threads</em> was requested.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq.html">zmq(7)</a>
+<a href="zmq_term.html">zmq_term(3)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_init.txt b/doc/zmq_init.txt new file mode 100644 index 0000000..94795bf --- /dev/null +++ b/doc/zmq_init.txt @@ -0,0 +1,52 @@ +zmq_init(3) +=========== + + +NAME +---- +zmq_init - initialise 0MQ context + + +SYNOPSIS +-------- +*void *zmq_init (int 'io_threads');* + + +DESCRIPTION +----------- +The _zmq_init()_ function initialises a 0MQ 'context'. + +The 'io_threads' argument specifies the size of the 0MQ thread pool to handle +I/O operations. If your application is using only the 'inproc' transport for +messaging you may set this to zero, otherwise set it to at least one. + +.Thread safety +A 0MQ 'context' is thread safe and may be shared among as many application +threads as necessary, without any additional locking required on the part of +the caller. + +This function is deprecated by linkzmq:zmq_ctx_new[3]. + +RETURN VALUE +------------ +The _zmq_init()_ function shall return an opaque handle to the initialised +'context' if successful. Otherwise it shall return NULL and set 'errno' to one +of the values defined below. + + +ERRORS +------ +*EINVAL*:: +An invalid number of 'io_threads' was requested. + + +SEE ALSO +-------- +linkzmq:zmq[7] +linkzmq:zmq_term[3] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_inproc.7 b/doc/zmq_inproc.7 new file mode 100644 index 0000000..fc47cc0 --- /dev/null +++ b/doc/zmq_inproc.7 @@ -0,0 +1,119 @@ +'\" t +.\" Title: zmq_inproc +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_INPROC" "7" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_inproc \- 0MQ local in\-process (inter\-thread) communication transport +.SH "SYNOPSIS" +.sp +The in\-process transport passes messages via memory directly between threads sharing a single 0MQ \fIcontext\fR\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +No I/O threads are involved in passing messages using the \fIinproc\fR transport\&. Therefore, if you are using a 0MQ \fIcontext\fR for in\-process messaging only you can initialise the \fIcontext\fR with zero I/O threads\&. See \fBzmq_init\fR(3) for details\&. +.sp .5v +.RE +.SH "ADDRESSING" +.sp +A 0MQ endpoint is a string consisting of a \fItransport\fR:// followed by an \fIaddress\fR\&. The \fItransport\fR specifies the underlying protocol to use\&. The \fIaddress\fR specifies the transport\-specific address to connect to\&. +.sp +For the in\-process transport, the transport is inproc, and the meaning of the \fIaddress\fR part is defined below\&. +.SS "Assigning a local address to a socket" +.sp +When assigning a local address to a \fIsocket\fR using \fIzmq_bind()\fR with the \fIinproc\fR transport, the \fIendpoint\fR shall be interpreted as an arbitrary string identifying the \fIname\fR to create\&. The \fIname\fR must be unique within the 0MQ \fIcontext\fR associated with the \fIsocket\fR and may be up to 256 characters in length\&. No other restrictions are placed on the format of the \fIname\fR\&. +.SS "Connecting a socket" +.sp +When connecting a \fIsocket\fR to a peer address using \fIzmq_connect()\fR with the \fIinproc\fR transport, the \fIendpoint\fR shall be interpreted as an arbitrary string identifying the \fIname\fR to connect to\&. The \fIname\fR must have been previously created by assigning it to at least one \fIsocket\fR within the same 0MQ \fIcontext\fR as the \fIsocket\fR being connected\&. +.SH "EXAMPLES" +.PP +\fBAssigning a local address to a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +// Assign the in\-process name "#1" +rc = zmq_bind(socket, "inproc://#1"); +assert (rc == 0); +// Assign the in\-process name "my\-endpoint" +rc = zmq_bind(socket, "inproc://my\-endpoint"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.PP +\fBConnecting a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +// Connect to the in\-process name "#1" +rc = zmq_connect(socket, "inproc://#1"); +assert (rc == 0); +// Connect to the in\-process name "my\-endpoint" +rc = zmq_connect(socket, "inproc://my\-endpoint"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_bind\fR(3) \fBzmq_connect\fR(3) \fBzmq_ipc\fR(7) \fBzmq_tcp\fR(7) \fBzmq_pgm\fR(7) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[2]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE +.IP " 2." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 3." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_inproc.html b/doc/zmq_inproc.html new file mode 100644 index 0000000..bf3f9d2 --- /dev/null +++ b/doc/zmq_inproc.html @@ -0,0 +1,845 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_inproc(7) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_inproc -
+ 0MQ local in-process (inter-thread) communication transport
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The in-process transport passes messages via memory directly between threads
+sharing a single ØMQ <em>context</em>.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">No I/O threads are involved in passing messages using the <em>inproc</em>
+transport. Therefore, if you are using a ØMQ <em>context</em> for in-process messaging
+only you can initialise the <em>context</em> with zero I/O threads. See
+<a href="zmq_init.html">zmq_init(3)</a> for details.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_addressing">ADDRESSING</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>A ØMQ endpoint is a string consisting of a <em>transport</em><tt>://</tt> followed by an
+<em>address</em>. The <em>transport</em> specifies the underlying protocol to use. The
+<em>address</em> specifies the transport-specific address to connect to.</p></div>
+<div class="paragraph"><p>For the in-process transport, the transport is <tt>inproc</tt>, and the meaning of
+the <em>address</em> part is defined below.</p></div>
+<div class="sect2">
+<h3 id="_assigning_a_local_address_to_a_socket">Assigning a local address to a socket</h3>
+<div class="paragraph"><p>When assigning a local address to a <em>socket</em> using <em>zmq_bind()</em> with the
+<em>inproc</em> transport, the <em>endpoint</em> shall be interpreted as an arbitrary string
+identifying the <em>name</em> to create. The <em>name</em> must be unique within the ØMQ
+<em>context</em> associated with the <em>socket</em> and may be up to 256 characters in
+length. No other restrictions are placed on the format of the <em>name</em>.</p></div>
+</div>
+<div class="sect2">
+<h3 id="_connecting_a_socket">Connecting a socket</h3>
+<div class="paragraph"><p>When connecting a <em>socket</em> to a peer address using <em>zmq_connect()</em> with the
+<em>inproc</em> transport, the <em>endpoint</em> shall be interpreted as an arbitrary string
+identifying the <em>name</em> to connect to. The <em>name</em> must have been previously
+created by assigning it to at least one <em>socket</em> within the same ØMQ <em>context</em>
+as the <em>socket</em> being connected.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_examples">EXAMPLES</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Assigning a local address to a socket</div>
+<div class="content">
+<pre><tt>// Assign the in-process name "#1"
+rc = zmq_bind(socket, "inproc://#1");
+assert (rc == 0);
+// Assign the in-process name "my-endpoint"
+rc = zmq_bind(socket, "inproc://my-endpoint");
+assert (rc == 0);</tt></pre>
+</div></div>
+<div class="listingblock">
+<div class="title">Connecting a socket</div>
+<div class="content">
+<pre><tt>// Connect to the in-process name "#1"
+rc = zmq_connect(socket, "inproc://#1");
+assert (rc == 0);
+// Connect to the in-process name "my-endpoint"
+rc = zmq_connect(socket, "inproc://my-endpoint");
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_bind.html">zmq_bind(3)</a>
+<a href="zmq_connect.html">zmq_connect(3)</a>
+<a href="zmq_ipc.html">zmq_ipc(7)</a>
+<a href="zmq_tcp.html">zmq_tcp(7)</a>
+<a href="zmq_pgm.html">zmq_pgm(7)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>,
+Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-11-14 10:09:14 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_inproc.txt b/doc/zmq_inproc.txt new file mode 100644 index 0000000..c6e3ea8 --- /dev/null +++ b/doc/zmq_inproc.txt @@ -0,0 +1,85 @@ +zmq_inproc(7) +============= + + +NAME +---- +zmq_inproc - 0MQ local in-process (inter-thread) communication transport + + +SYNOPSIS +-------- +The in-process transport passes messages via memory directly between threads +sharing a single 0MQ 'context'. + +NOTE: No I/O threads are involved in passing messages using the 'inproc' +transport. Therefore, if you are using a 0MQ 'context' for in-process messaging +only you can initialise the 'context' with zero I/O threads. See +linkzmq:zmq_init[3] for details. + + +ADDRESSING +---------- +A 0MQ endpoint is a string consisting of a 'transport'`://` followed by an +'address'. The 'transport' specifies the underlying protocol to use. The +'address' specifies the transport-specific address to connect to. + +For the in-process transport, the transport is `inproc`, and the meaning of +the 'address' part is defined below. + + +Assigning a local address to a socket +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +When assigning a local address to a 'socket' using _zmq_bind()_ with the +'inproc' transport, the 'endpoint' shall be interpreted as an arbitrary string +identifying the 'name' to create. The 'name' must be unique within the 0MQ +'context' associated with the 'socket' and may be up to 256 characters in +length. No other restrictions are placed on the format of the 'name'. + + +Connecting a socket +~~~~~~~~~~~~~~~~~~~ +When connecting a 'socket' to a peer address using _zmq_connect()_ with the +'inproc' transport, the 'endpoint' shall be interpreted as an arbitrary string +identifying the 'name' to connect to. The 'name' must have been previously +created by assigning it to at least one 'socket' within the same 0MQ 'context' +as the 'socket' being connected. + + +EXAMPLES +-------- +.Assigning a local address to a socket +---- +// Assign the in-process name "#1" +rc = zmq_bind(socket, "inproc://#1"); +assert (rc == 0); +// Assign the in-process name "my-endpoint" +rc = zmq_bind(socket, "inproc://my-endpoint"); +assert (rc == 0); +---- + +.Connecting a socket +---- +// Connect to the in-process name "#1" +rc = zmq_connect(socket, "inproc://#1"); +assert (rc == 0); +// Connect to the in-process name "my-endpoint" +rc = zmq_connect(socket, "inproc://my-endpoint"); +assert (rc == 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_bind[3] +linkzmq:zmq_connect[3] +linkzmq:zmq_ipc[7] +linkzmq:zmq_tcp[7] +linkzmq:zmq_pgm[7] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com>, +Martin Sustrik <sustrik@250bpm.com> and Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_ipc.7 b/doc/zmq_ipc.7 new file mode 100644 index 0000000..5a64250 --- /dev/null +++ b/doc/zmq_ipc.7 @@ -0,0 +1,131 @@ +'\" t +.\" Title: zmq_ipc +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_IPC" "7" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_ipc \- 0MQ local inter\-process communication transport +.SH "SYNOPSIS" +.sp +The inter\-process transport passes messages between local processes using a system\-dependent IPC mechanism\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +The inter\-process transport is currently only implemented on operating systems that provide UNIX domain sockets\&. +.sp .5v +.RE +.SH "ADDRESSING" +.sp +A 0MQ endpoint is a string consisting of a \fItransport\fR:// followed by an \fIaddress\fR\&. The \fItransport\fR specifies the underlying protocol to use\&. The \fIaddress\fR specifies the transport\-specific address to connect to\&. +.sp +For the inter\-process transport, the transport is ipc, and the meaning of the \fIaddress\fR part is defined below\&. +.SS "Binding a socket" +.sp +When binding a \fIsocket\fR to a local address using \fIzmq_bind()\fR with the \fIipc\fR transport, the \fIendpoint\fR shall be interpreted as an arbitrary string identifying the \fIpathname\fR to create\&. The \fIpathname\fR must be unique within the operating system namespace used by the \fIipc\fR implementation, and must fulfill any restrictions placed by the operating system on the format and length of a \fIpathname\fR\&. +.sp +When the address is *, \fIzmq_bind()\fR shall generate a unique temporary pathname\&. The caller should retrieve this pathname using the ZMQ_LAST_ENDPOINT socket option\&. See \fBzmq_getsockopt\fR(3) for details\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +any existing binding to the same endpoint shall be overridden\&. In this behavior, the \fIipc\fR transport is not consistent with the \fItcp\fR or \fIinproc\fR transports\&. +.sp .5v +.RE +.SS "Connecting a socket" +.sp +When connecting a \fIsocket\fR to a peer address using \fIzmq_connect()\fR with the \fIipc\fR transport, the \fIendpoint\fR shall be interpreted as an arbitrary string identifying the \fIpathname\fR to connect to\&. The \fIpathname\fR must have been previously created within the operating system namespace by assigning it to a \fIsocket\fR with \fIzmq_bind()\fR\&. +.SH "EXAMPLES" +.PP +\fBAssigning a local address to a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +// Assign the pathname "/tmp/feeds/0" +rc = zmq_bind(socket, "ipc:///tmp/feeds/0"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.PP +\fBConnecting a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +// Connect to the pathname "/tmp/feeds/0" +rc = zmq_connect(socket, "ipc:///tmp/feeds/0"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_bind\fR(3) \fBzmq_connect\fR(3) \fBzmq_inproc\fR(7) \fBzmq_tcp\fR(7) \fBzmq_pgm\fR(7) \fBzmq_getsockopt\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[2]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE +.IP " 2." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 3." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_ipc.html b/doc/zmq_ipc.html new file mode 100644 index 0000000..cbb55c1 --- /dev/null +++ b/doc/zmq_ipc.html @@ -0,0 +1,852 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<div id="header">
+<h1>
+zmq_ipc(7) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_ipc -
+ 0MQ local inter-process communication transport
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The inter-process transport passes messages between local processes using a
+system-dependent IPC mechanism.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">The inter-process transport is currently only implemented on operating
+systems that provide UNIX domain sockets.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_addressing">ADDRESSING</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>A ØMQ endpoint is a string consisting of a <em>transport</em><tt>://</tt> followed by an
+<em>address</em>. The <em>transport</em> specifies the underlying protocol to use. The
+<em>address</em> specifies the transport-specific address to connect to.</p></div>
+<div class="paragraph"><p>For the inter-process transport, the transport is <tt>ipc</tt>, and the meaning of
+the <em>address</em> part is defined below.</p></div>
+<div class="sect2">
+<h3 id="_binding_a_socket">Binding a socket</h3>
+<div class="paragraph"><p>When binding a <em>socket</em> to a local address using <em>zmq_bind()</em> with the <em>ipc</em>
+transport, the <em>endpoint</em> shall be interpreted as an arbitrary string
+identifying the <em>pathname</em> to create. The <em>pathname</em> must be unique within the
+operating system namespace used by the <em>ipc</em> implementation, and must fulfill
+any restrictions placed by the operating system on the format and length of a
+<em>pathname</em>.</p></div>
+<div class="paragraph"><p>When the address is <tt>*</tt>, <em>zmq_bind()</em> shall generate a unique temporary
+pathname. The caller should retrieve this pathname using the ZMQ_LAST_ENDPOINT
+socket option. See <a href="zmq_getsockopt.html">zmq_getsockopt(3)</a> for details.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">any existing binding to the same endpoint shall be overridden. In this
+behavior, the <em>ipc</em> transport is not consistent with the <em>tcp</em> or <em>inproc</em>
+transports.</td>
+</tr></table>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_connecting_a_socket">Connecting a socket</h3>
+<div class="paragraph"><p>When connecting a <em>socket</em> to a peer address using <em>zmq_connect()</em> with the
+<em>ipc</em> transport, the <em>endpoint</em> shall be interpreted as an arbitrary string
+identifying the <em>pathname</em> to connect to. The <em>pathname</em> must have been
+previously created within the operating system namespace by assigning it to a
+<em>socket</em> with <em>zmq_bind()</em>.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_examples">EXAMPLES</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Assigning a local address to a socket</div>
+<div class="content">
+<pre><tt>// Assign the pathname "/tmp/feeds/0"
+rc = zmq_bind(socket, "ipc:///tmp/feeds/0");
+assert (rc == 0);</tt></pre>
+</div></div>
+<div class="listingblock">
+<div class="title">Connecting a socket</div>
+<div class="content">
+<pre><tt>// Connect to the pathname "/tmp/feeds/0"
+rc = zmq_connect(socket, "ipc:///tmp/feeds/0");
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_bind.html">zmq_bind(3)</a>
+<a href="zmq_connect.html">zmq_connect(3)</a>
+<a href="zmq_inproc.html">zmq_inproc(7)</a>
+<a href="zmq_tcp.html">zmq_tcp(7)</a>
+<a href="zmq_pgm.html">zmq_pgm(7)</a>
+<a href="zmq_getsockopt.html">zmq_getsockopt(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>,
+Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-11-14 10:09:14 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_ipc.txt b/doc/zmq_ipc.txt new file mode 100644 index 0000000..4d9f6f1 --- /dev/null +++ b/doc/zmq_ipc.txt @@ -0,0 +1,85 @@ +zmq_ipc(7) +========== + + +NAME +---- +zmq_ipc - 0MQ local inter-process communication transport + + +SYNOPSIS +-------- +The inter-process transport passes messages between local processes using a +system-dependent IPC mechanism. + +NOTE: The inter-process transport is currently only implemented on operating +systems that provide UNIX domain sockets. + + +ADDRESSING +---------- +A 0MQ endpoint is a string consisting of a 'transport'`://` followed by an +'address'. The 'transport' specifies the underlying protocol to use. The +'address' specifies the transport-specific address to connect to. + +For the inter-process transport, the transport is `ipc`, and the meaning of +the 'address' part is defined below. + + +Binding a socket +~~~~~~~~~~~~~~~~ +When binding a 'socket' to a local address using _zmq_bind()_ with the 'ipc' +transport, the 'endpoint' shall be interpreted as an arbitrary string +identifying the 'pathname' to create. The 'pathname' must be unique within the +operating system namespace used by the 'ipc' implementation, and must fulfill +any restrictions placed by the operating system on the format and length of a +'pathname'. + +When the address is `*`, _zmq_bind()_ shall generate a unique temporary +pathname. The caller should retrieve this pathname using the ZMQ_LAST_ENDPOINT +socket option. See linkzmq:zmq_getsockopt[3] for details. + +NOTE: any existing binding to the same endpoint shall be overridden. In this +behavior, the 'ipc' transport is not consistent with the 'tcp' or 'inproc' +transports. + +Connecting a socket +~~~~~~~~~~~~~~~~~~~ +When connecting a 'socket' to a peer address using _zmq_connect()_ with the +'ipc' transport, the 'endpoint' shall be interpreted as an arbitrary string +identifying the 'pathname' to connect to. The 'pathname' must have been +previously created within the operating system namespace by assigning it to a +'socket' with _zmq_bind()_. + + +EXAMPLES +-------- +.Assigning a local address to a socket +---- +// Assign the pathname "/tmp/feeds/0" +rc = zmq_bind(socket, "ipc:///tmp/feeds/0"); +assert (rc == 0); +---- + +.Connecting a socket +---- +// Connect to the pathname "/tmp/feeds/0" +rc = zmq_connect(socket, "ipc:///tmp/feeds/0"); +assert (rc == 0); +---- + +SEE ALSO +-------- +linkzmq:zmq_bind[3] +linkzmq:zmq_connect[3] +linkzmq:zmq_inproc[7] +linkzmq:zmq_tcp[7] +linkzmq:zmq_pgm[7] +linkzmq:zmq_getsockopt[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com>, +Martin Sustrik <sustrik@250bpm.com> and Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_msg_close.3 b/doc/zmq_msg_close.3 new file mode 100644 index 0000000..7d134a5 --- /dev/null +++ b/doc/zmq_msg_close.3 @@ -0,0 +1,81 @@ +'\" t +.\" Title: zmq_msg_close +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_CLOSE" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_close \- release 0MQ message +.SH "SYNOPSIS" +.sp +\fBint zmq_msg_close (zmq_msg_t \fR\fB\fI*msg\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_close()\fR function shall inform the 0MQ infrastructure that any resources associated with the message object referenced by \fImsg\fR are no longer required and may be released\&. Actual release of resources associated with the message object shall be postponed by 0MQ until all users of the message or underlying data buffer have indicated it is no longer required\&. +.sp +Applications should ensure that \fIzmq_msg_close()\fR is called once a message is no longer required, otherwise memory leaks may occur\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +Never access \fIzmq_msg_t\fR members directly, instead always use the \fIzmq_msg\fR family of functions\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_msg_close()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEFAULT\fR +.RS 4 +Invalid message\&. +.RE +.SH "SEE ALSO" +.sp +\fBzmq_msg_init\fR(3) \fBzmq_msg_init_size\fR(3) \fBzmq_msg_init_data\fR(3) \fBzmq_msg_data\fR(3) \fBzmq_msg_size\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_msg_close.html b/doc/zmq_msg_close.html new file mode 100644 index 0000000..4d410f9 --- /dev/null +++ b/doc/zmq_msg_close.html @@ -0,0 +1,825 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_msg_close(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_close -
+ release 0MQ message
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_msg_close (zmq_msg_t <em>*msg</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_close()</em> function shall inform the ØMQ infrastructure that any
+resources associated with the message object referenced by <em>msg</em> are no longer
+required and may be released. Actual release of resources associated with the
+message object shall be postponed by ØMQ until all users of the message or
+underlying data buffer have indicated it is no longer required.</p></div>
+<div class="paragraph"><p>Applications should ensure that <em>zmq_msg_close()</em> is called once a message is
+no longer required, otherwise memory leaks may occur.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">Never access <em>zmq_msg_t</em> members directly, instead always use the
+<em>zmq_msg</em> family of functions.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_close()</em> function shall return zero if successful. Otherwise
+it shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EFAULT</strong>
+</dt>
+<dd>
+<p>
+Invalid message.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_msg_init.html">zmq_msg_init(3)</a>
+<a href="zmq_msg_init_size.html">zmq_msg_init_size(3)</a>
+<a href="zmq_msg_init_data.html">zmq_msg_init_data(3)</a>
+<a href="zmq_msg_data.html">zmq_msg_data(3)</a>
+<a href="zmq_msg_size.html">zmq_msg_size(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_close.txt b/doc/zmq_msg_close.txt new file mode 100644 index 0000000..025302b --- /dev/null +++ b/doc/zmq_msg_close.txt @@ -0,0 +1,55 @@ +zmq_msg_close(3) +================ + + +NAME +---- +zmq_msg_close - release 0MQ message + + +SYNOPSIS +-------- +*int zmq_msg_close (zmq_msg_t '*msg');* + + +DESCRIPTION +----------- +The _zmq_msg_close()_ function shall inform the 0MQ infrastructure that any +resources associated with the message object referenced by 'msg' are no longer +required and may be released. Actual release of resources associated with the +message object shall be postponed by 0MQ until all users of the message or +underlying data buffer have indicated it is no longer required. + +Applications should ensure that _zmq_msg_close()_ is called once a message is +no longer required, otherwise memory leaks may occur. + +CAUTION: Never access 'zmq_msg_t' members directly, instead always use the +_zmq_msg_ family of functions. + + +RETURN VALUE +------------ +The _zmq_msg_close()_ function shall return zero if successful. Otherwise +it shall return `-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +*EFAULT*:: +Invalid message. + + +SEE ALSO +-------- +linkzmq:zmq_msg_init[3] +linkzmq:zmq_msg_init_size[3] +linkzmq:zmq_msg_init_data[3] +linkzmq:zmq_msg_data[3] +linkzmq:zmq_msg_size[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_msg_copy.3 b/doc/zmq_msg_copy.3 new file mode 100644 index 0000000..dac3f71 --- /dev/null +++ b/doc/zmq_msg_copy.3 @@ -0,0 +1,95 @@ +'\" t +.\" Title: zmq_msg_copy +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_COPY" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_copy \- copy content of a message to another message +.SH "SYNOPSIS" +.sp +\fBint zmq_msg_copy (zmq_msg_t \fR\fB\fI*dest\fR\fR\fB, zmq_msg_t \fR\fB\fI*src\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_copy()\fR function shall copy the message object referenced by \fIsrc\fR to the message object referenced by \fIdest\fR\&. The original content of \fIdest\fR, if any, shall be released\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +The implementation may choose not to physically copy the message content, rather to share the underlying buffer between \fIsrc\fR and \fIdest\fR\&. Avoid modifying message content after a message has been copied with \fIzmq_msg_copy()\fR, doing so can result in undefined behaviour\&. If what you need is an actual hard copy, allocate a new message using \fIzmq_msg_init_size()\fR and copy the message content using \fImemcpy()\fR\&. +.sp .5v +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +Never access \fIzmq_msg_t\fR members directly, instead always use the \fIzmq_msg\fR family of functions\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_msg_copy()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEFAULT\fR +.RS 4 +Invalid message\&. +.RE +.SH "SEE ALSO" +.sp +\fBzmq_msg_move\fR(3) \fBzmq_msg_init\fR(3) \fBzmq_msg_init_size\fR(3) \fBzmq_msg_init_data\fR(3) \fBzmq_msg_close\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_msg_copy.html b/doc/zmq_msg_copy.html new file mode 100644 index 0000000..8734d53 --- /dev/null +++ b/doc/zmq_msg_copy.html @@ -0,0 +1,834 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_msg_copy(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_copy -
+ copy content of a message to another message
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_msg_copy (zmq_msg_t <em>*dest</em>, zmq_msg_t <em>*src</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_copy()</em> function shall copy the message object referenced by <em>src</em>
+to the message object referenced by <em>dest</em>. The original content of <em>dest</em>, if
+any, shall be released.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">The implementation may choose not to physically copy the message
+content, rather to share the underlying buffer between <em>src</em> and <em>dest</em>. Avoid
+modifying message content after a message has been copied with
+<em>zmq_msg_copy()</em>, doing so can result in undefined behaviour. If what you need
+is an actual hard copy, allocate a new message using <em>zmq_msg_init_size()</em> and
+copy the message content using <em>memcpy()</em>.</td>
+</tr></table>
+</div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">Never access <em>zmq_msg_t</em> members directly, instead always use the
+<em>zmq_msg</em> family of functions.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_copy()</em> function shall return zero if successful. Otherwise it
+shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EFAULT</strong>
+</dt>
+<dd>
+<p>
+Invalid message.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_msg_move.html">zmq_msg_move(3)</a>
+<a href="zmq_msg_init.html">zmq_msg_init(3)</a>
+<a href="zmq_msg_init_size.html">zmq_msg_init_size(3)</a>
+<a href="zmq_msg_init_data.html">zmq_msg_init_data(3)</a>
+<a href="zmq_msg_close.html">zmq_msg_close(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_copy.txt b/doc/zmq_msg_copy.txt new file mode 100644 index 0000000..d6ce1b9 --- /dev/null +++ b/doc/zmq_msg_copy.txt @@ -0,0 +1,57 @@ +zmq_msg_copy(3) +=============== + + +NAME +---- +zmq_msg_copy - copy content of a message to another message + + +SYNOPSIS +-------- +*int zmq_msg_copy (zmq_msg_t '*dest', zmq_msg_t '*src');* + + +DESCRIPTION +----------- +The _zmq_msg_copy()_ function shall copy the message object referenced by 'src' +to the message object referenced by 'dest'. The original content of 'dest', if +any, shall be released. + +CAUTION: The implementation may choose not to physically copy the message +content, rather to share the underlying buffer between 'src' and 'dest'. Avoid +modifying message content after a message has been copied with +_zmq_msg_copy()_, doing so can result in undefined behaviour. If what you need +is an actual hard copy, allocate a new message using _zmq_msg_init_size()_ and +copy the message content using _memcpy()_. + +CAUTION: Never access 'zmq_msg_t' members directly, instead always use the +_zmq_msg_ family of functions. + + +RETURN VALUE +------------ +The _zmq_msg_copy()_ function shall return zero if successful. Otherwise it +shall return `-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +*EFAULT*:: +Invalid message. + + +SEE ALSO +-------- +linkzmq:zmq_msg_move[3] +linkzmq:zmq_msg_init[3] +linkzmq:zmq_msg_init_size[3] +linkzmq:zmq_msg_init_data[3] +linkzmq:zmq_msg_close[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_msg_data.3 b/doc/zmq_msg_data.3 new file mode 100644 index 0000000..f25d420 --- /dev/null +++ b/doc/zmq_msg_data.3 @@ -0,0 +1,76 @@ +'\" t +.\" Title: zmq_msg_data +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_DATA" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_data \- retrieve pointer to message content +.SH "SYNOPSIS" +.sp +\fBvoid *zmq_msg_data (zmq_msg_t \fR\fB\fI*msg\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_data()\fR function shall return a pointer to the message content of the message object referenced by \fImsg\fR\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +Never access \fIzmq_msg_t\fR members directly, instead always use the \fIzmq_msg\fR family of functions\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +Upon successful completion, \fIzmq_msg_data()\fR shall return a pointer to the message content\&. +.SH "ERRORS" +.sp +No errors are defined\&. +.SH "SEE ALSO" +.sp +\fBzmq_msg_size\fR(3) \fBzmq_msg_init\fR(3) \fBzmq_msg_init_size\fR(3) \fBzmq_msg_init_data\fR(3) \fBzmq_msg_close\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_msg_data.html b/doc/zmq_msg_data.html new file mode 100644 index 0000000..cc0009d --- /dev/null +++ b/doc/zmq_msg_data.html @@ -0,0 +1,811 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<h1>
+zmq_msg_data(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_data -
+ retrieve pointer to message content
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>void *zmq_msg_data (zmq_msg_t <em>*msg</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_data()</em> function shall return a pointer to the message content of
+the message object referenced by <em>msg</em>.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">Never access <em>zmq_msg_t</em> members directly, instead always use the
+<em>zmq_msg</em> family of functions.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Upon successful completion, <em>zmq_msg_data()</em> shall return a pointer to the
+message content.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>No errors are defined.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_msg_size.html">zmq_msg_size(3)</a>
+<a href="zmq_msg_init.html">zmq_msg_init(3)</a>
+<a href="zmq_msg_init_size.html">zmq_msg_init_size(3)</a>
+<a href="zmq_msg_init_data.html">zmq_msg_init_data(3)</a>
+<a href="zmq_msg_close.html">zmq_msg_close(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_data.txt b/doc/zmq_msg_data.txt new file mode 100644 index 0000000..36a3ce3 --- /dev/null +++ b/doc/zmq_msg_data.txt @@ -0,0 +1,48 @@ +zmq_msg_data(3) +=============== + + +NAME +---- +zmq_msg_data - retrieve pointer to message content + + +SYNOPSIS +-------- +*void *zmq_msg_data (zmq_msg_t '*msg');* + + +DESCRIPTION +----------- +The _zmq_msg_data()_ function shall return a pointer to the message content of +the message object referenced by 'msg'. + +CAUTION: Never access 'zmq_msg_t' members directly, instead always use the +_zmq_msg_ family of functions. + + +RETURN VALUE +------------ +Upon successful completion, _zmq_msg_data()_ shall return a pointer to the +message content. + + +ERRORS +------ +No errors are defined. + + +SEE ALSO +-------- +linkzmq:zmq_msg_size[3] +linkzmq:zmq_msg_init[3] +linkzmq:zmq_msg_init_size[3] +linkzmq:zmq_msg_init_data[3] +linkzmq:zmq_msg_close[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_msg_get.3 b/doc/zmq_msg_get.3 new file mode 100644 index 0000000..99c0826 --- /dev/null +++ b/doc/zmq_msg_get.3 @@ -0,0 +1,101 @@ +'\" t +.\" Title: zmq_msg_get +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_GET" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_get \- get message property +.SH "SYNOPSIS" +.sp +\fBint zmq_msg_get (zmq_msg_t \fR\fB\fI*message\fR\fR\fB, int \fR\fB\fIproperty\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_get()\fR function shall return the value for the property specified by the \fIproperty\fR argument for the message pointed to by the \fImessage\fR argument\&. +.sp +The following properties can be retrieved with the \fIzmq_msg_get()\fR function: +.PP +\fBZMQ_MORE\fR +.RS 4 +Indicates that there are more message frames to follow after the +\fImessage\fR\&. +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_msg_get()\fR function shall return the value for the property if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +The requested +\fIproperty\fR +is unknown\&. +.RE +.SH "EXAMPLE" +.PP +\fBReceiving a multi-frame message\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +while (true) { + // Create an empty 0MQ message to hold the message frame + int rc = zmq_msg_init (&frame); + assert (rc == 0); + // Block until a message is available to be received from socket + rc = zmq_recvmsg (socket, &frame, 0); + assert (rc != \-1); + if (zmq_msg_get (&frame, ZMQ_MORE)) + fprintf (stderr, "more\en"); + else { + fprintf (stderr, "end\en"); + break; + } + zmq_msg_close (frame); +} +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_msg_set\fR(3) \fBzmq_msg_init\fR(3) \fBzmq_msg_close\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Chuck Remes <\m[blue]\fBcremes@mac\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +cremes@mac.com +.RS 4 +\%mailto:cremes@mac.com +.RE +.IP " 2." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_msg_get.html b/doc/zmq_msg_get.html new file mode 100644 index 0000000..96faa25 --- /dev/null +++ b/doc/zmq_msg_get.html @@ -0,0 +1,846 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_msg_get(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_get -
+ get message property
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_msg_get (zmq_msg_t <em>*message</em>, int <em>property</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_get()</em> function shall return the value for the property
+specified by the <em>property</em> argument for the message pointed to by the
+<em>message</em> argument.</p></div>
+<div class="paragraph"><p>The following properties can be retrieved with the <em>zmq_msg_get()</em> function:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ZMQ_MORE</strong>
+</dt>
+<dd>
+<p>
+Indicates that there are more message frames to follow after the <em>message</em>.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_get()</em> function shall return the value for the property if
+successful. Otherwise it shall return <tt>-1</tt> and set <em>errno</em> to one of the
+values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The requested <em>property</em> is unknown.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Receiving a multi-frame message</div>
+<div class="content">
+<pre><tt>while (true) {
+ // Create an empty 0MQ message to hold the message frame
+ int rc = zmq_msg_init (&frame);
+ assert (rc == 0);
+ // Block until a message is available to be received from socket
+ rc = zmq_recvmsg (socket, &frame, 0);
+ assert (rc != -1);
+ if (zmq_msg_get (&frame, ZMQ_MORE))
+ fprintf (stderr, "more\n");
+ else {
+ fprintf (stderr, "end\n");
+ break;
+ }
+ zmq_msg_close (frame);
+}</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_msg_set.html">zmq_msg_set(3)</a>
+<a href="zmq_msg_init.html">zmq_msg_init(3)</a>
+<a href="zmq_msg_close.html">zmq_msg_close(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Chuck Remes <<a href="mailto:cremes@mac.com">cremes@mac.com</a>> and Pieter
+Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_get.txt b/doc/zmq_msg_get.txt new file mode 100644 index 0000000..d5fd918 --- /dev/null +++ b/doc/zmq_msg_get.txt @@ -0,0 +1,72 @@ +zmq_msg_get(3) +============== + + +NAME +---- +zmq_msg_get - get message property + + +SYNOPSIS +-------- +*int zmq_msg_get (zmq_msg_t '*message', int 'property');* + + +DESCRIPTION +----------- +The _zmq_msg_get()_ function shall return the value for the property +specified by the 'property' argument for the message pointed to by the +'message' argument. + +The following properties can be retrieved with the _zmq_msg_get()_ function: + +*ZMQ_MORE*:: +Indicates that there are more message frames to follow after the 'message'. + +RETURN VALUE +------------ +The _zmq_msg_get()_ function shall return the value for the property if +successful. Otherwise it shall return `-1` and set 'errno' to one of the +values defined below. + + +ERRORS +------ +*EINVAL*:: +The requested _property_ is unknown. + + +EXAMPLE +------- +.Receiving a multi-frame message +---- +while (true) { + // Create an empty 0MQ message to hold the message frame + int rc = zmq_msg_init (&frame); + assert (rc == 0); + // Block until a message is available to be received from socket + rc = zmq_recvmsg (socket, &frame, 0); + assert (rc != -1); + if (zmq_msg_get (&frame, ZMQ_MORE)) + fprintf (stderr, "more\n"); + else { + fprintf (stderr, "end\n"); + break; + } + zmq_msg_close (frame); +} +---- + + +SEE ALSO +-------- +linkzmq:zmq_msg_set[3] +linkzmq:zmq_msg_init[3] +linkzmq:zmq_msg_close[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Chuck Remes <cremes@mac.com> and Pieter +Hintjens <ph@imatix.com>. diff --git a/doc/zmq_msg_init.3 b/doc/zmq_msg_init.3 new file mode 100644 index 0000000..b81f0ea --- /dev/null +++ b/doc/zmq_msg_init.3 @@ -0,0 +1,110 @@ +'\" t +.\" Title: zmq_msg_init +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_INIT" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_init \- initialise empty 0MQ message +.SH "SYNOPSIS" +.sp +\fBint zmq_msg_init (zmq_msg_t \fR\fB\fI*msg\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_init()\fR function shall initialise the message object referenced by \fImsg\fR to represent an empty message\&. This function is most useful when called before receiving a message with \fIzmq_recv()\fR\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +Never access \fIzmq_msg_t\fR members directly, instead always use the \fIzmq_msg\fR family of functions\&. +.sp .5v +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +The functions \fIzmq_msg_init()\fR, \fIzmq_msg_init_data()\fR and \fIzmq_msg_init_size()\fR are mutually exclusive\&. Never initialize the same \fIzmq_msg_t\fR twice\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_msg_init()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.sp +No errors are defined\&. +.SH "EXAMPLE" +.PP +\fBReceiving a message from a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +zmq_msg_t msg; +rc = zmq_msg_init (&msg); +assert (rc == 0); +rc = zmq_recv (socket, &msg, 0); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_msg_init_size\fR(3) \fBzmq_msg_init_data\fR(3) \fBzmq_msg_close\fR(3) \fBzmq_msg_data\fR(3) \fBzmq_msg_size\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_msg_init.html b/doc/zmq_msg_init.html new file mode 100644 index 0000000..1138754 --- /dev/null +++ b/doc/zmq_msg_init.html @@ -0,0 +1,836 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_msg_init(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_init -
+ initialise empty 0MQ message
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_msg_init (zmq_msg_t <em>*msg</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_init()</em> function shall initialise the message object referenced by
+<em>msg</em> to represent an empty message. This function is most useful when called
+before receiving a message with <em>zmq_recv()</em>.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">Never access <em>zmq_msg_t</em> members directly, instead always use the
+<em>zmq_msg</em> family of functions.</td>
+</tr></table>
+</div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">The functions <em>zmq_msg_init()</em>, <em>zmq_msg_init_data()</em> and
+<em>zmq_msg_init_size()</em> are mutually exclusive. Never initialize the same
+<em>zmq_msg_t</em> twice.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_init()</em> function shall return zero if successful. Otherwise it
+shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>No errors are defined.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Receiving a message from a socket</div>
+<div class="content">
+<pre><tt>zmq_msg_t msg;
+rc = zmq_msg_init (&msg);
+assert (rc == 0);
+rc = zmq_recv (socket, &msg, 0);
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_msg_init_size.html">zmq_msg_init_size(3)</a>
+<a href="zmq_msg_init_data.html">zmq_msg_init_data(3)</a>
+<a href="zmq_msg_close.html">zmq_msg_close(3)</a>
+<a href="zmq_msg_data.html">zmq_msg_data(3)</a>
+<a href="zmq_msg_size.html">zmq_msg_size(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_init.txt b/doc/zmq_msg_init.txt new file mode 100644 index 0000000..1c2577d --- /dev/null +++ b/doc/zmq_msg_init.txt @@ -0,0 +1,65 @@ +zmq_msg_init(3) +=============== + + +NAME +---- +zmq_msg_init - initialise empty 0MQ message + + +SYNOPSIS +-------- +*int zmq_msg_init (zmq_msg_t '*msg');* + + +DESCRIPTION +----------- +The _zmq_msg_init()_ function shall initialise the message object referenced by +'msg' to represent an empty message. This function is most useful when called +before receiving a message with _zmq_recv()_. + +CAUTION: Never access 'zmq_msg_t' members directly, instead always use the +_zmq_msg_ family of functions. + +CAUTION: The functions _zmq_msg_init()_, _zmq_msg_init_data()_ and +_zmq_msg_init_size()_ are mutually exclusive. Never initialize the same +'zmq_msg_t' twice. + + +RETURN VALUE +------------ +The _zmq_msg_init()_ function shall return zero if successful. Otherwise it +shall return `-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +No errors are defined. + + +EXAMPLE +------- +.Receiving a message from a socket +---- +zmq_msg_t msg; +rc = zmq_msg_init (&msg); +assert (rc == 0); +rc = zmq_recv (socket, &msg, 0); +assert (rc == 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_msg_init_size[3] +linkzmq:zmq_msg_init_data[3] +linkzmq:zmq_msg_close[3] +linkzmq:zmq_msg_data[3] +linkzmq:zmq_msg_size[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_msg_init_data.3 b/doc/zmq_msg_init_data.3 new file mode 100644 index 0000000..9c36441 --- /dev/null +++ b/doc/zmq_msg_init_data.3 @@ -0,0 +1,141 @@ +'\" t +.\" Title: zmq_msg_init_data +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_INIT_DATA" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_init_data \- initialise 0MQ message from a supplied buffer +.SH "SYNOPSIS" +.sp +\fBtypedef void (zmq_free_fn) (void \fR\fB\fI*data\fR\fR\fB, void \fR\fB\fI*hint\fR\fR\fB);\fR +.sp +\fBint zmq_msg_init_data (zmq_msg_t \fR\fB\fI*msg\fR\fR\fB, void \fR\fB\fI*data\fR\fR\fB, size_t \fR\fB\fIsize\fR\fR\fB, zmq_free_fn \fR\fB\fI*ffn\fR\fR\fB, void \fR\fB\fI*hint\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_init_data()\fR function shall initialise the message object referenced by \fImsg\fR to represent the content referenced by the buffer located at address \fIdata\fR, \fIsize\fR bytes long\&. No copy of \fIdata\fR shall be performed and 0MQ shall take ownership of the supplied buffer\&. +.sp +If provided, the deallocation function \fIffn\fR shall be called once the data buffer is no longer required by 0MQ, with the \fIdata\fR and \fIhint\fR arguments supplied to \fIzmq_msg_init_data()\fR\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +Never access \fIzmq_msg_t\fR members directly, instead always use the \fIzmq_msg\fR family of functions\&. +.sp .5v +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +The deallocation function \fIffn\fR needs to be thread\-safe, since it will be called from an arbitrary thread\&. +.sp .5v +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +The functions \fIzmq_msg_init()\fR, \fIzmq_msg_init_data()\fR and \fIzmq_msg_init_size()\fR are mutually exclusive\&. Never initialize the same \fIzmq_msg_t\fR twice\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_msg_init_data()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBENOMEM\fR +.RS 4 +Insufficient storage space is available\&. +.RE +.SH "EXAMPLE" +.PP +\fBInitialising a message from a supplied buffer\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +void my_free (void *data, void *hint) +{ + free (data); +} + + /* \&.\&.\&. */ + +void *data = malloc (6); +assert (data); +memcpy (data, "ABCDEF", 6); +zmq_msg_t msg; +rc = zmq_msg_init_data (&msg, data, 6, my_free, NULL); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_msg_init_size\fR(3) \fBzmq_msg_init\fR(3) \fBzmq_msg_close\fR(3) \fBzmq_msg_data\fR(3) \fBzmq_msg_size\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_msg_init_data.html b/doc/zmq_msg_init_data.html new file mode 100644 index 0000000..24e84fd --- /dev/null +++ b/doc/zmq_msg_init_data.html @@ -0,0 +1,867 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<h1>
+zmq_msg_init_data(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_init_data -
+ initialise 0MQ message from a supplied buffer
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>typedef void (zmq_free_fn) (void <em>*data</em>, void <em>*hint</em>);</strong></p></div>
+<div class="paragraph"><p><strong>int zmq_msg_init_data (zmq_msg_t <em>*msg</em>, void <em>*data</em>, size_t <em>size</em>, zmq_free_fn <em>*ffn</em>, void <em>*hint</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_init_data()</em> function shall initialise the message object
+referenced by <em>msg</em> to represent the content referenced by the buffer located
+at address <em>data</em>, <em>size</em> bytes long. No copy of <em>data</em> shall be performed and
+ØMQ shall take ownership of the supplied buffer.</p></div>
+<div class="paragraph"><p>If provided, the deallocation function <em>ffn</em> shall be called once the data
+buffer is no longer required by ØMQ, with the <em>data</em> and <em>hint</em> arguments
+supplied to <em>zmq_msg_init_data()</em>.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">Never access <em>zmq_msg_t</em> members directly, instead always use the
+<em>zmq_msg</em> family of functions.</td>
+</tr></table>
+</div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">The deallocation function <em>ffn</em> needs to be thread-safe, since it
+will be called from an arbitrary thread.</td>
+</tr></table>
+</div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">The functions <em>zmq_msg_init()</em>, <em>zmq_msg_init_data()</em> and
+<em>zmq_msg_init_size()</em> are mutually exclusive. Never initialize the same
+<em>zmq_msg_t</em> twice.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_init_data()</em> function shall return zero if successful. Otherwise
+it shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ENOMEM</strong>
+</dt>
+<dd>
+<p>
+Insufficient storage space is available.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Initialising a message from a supplied buffer</div>
+<div class="content">
+<pre><tt>void my_free (void *data, void *hint)
+{
+ free (data);
+}
+
+ /* ... */
+
+void *data = malloc (6);
+assert (data);
+memcpy (data, "ABCDEF", 6);
+zmq_msg_t msg;
+rc = zmq_msg_init_data (&msg, data, 6, my_free, NULL);
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_msg_init_size.html">zmq_msg_init_size(3)</a>
+<a href="zmq_msg_init.html">zmq_msg_init(3)</a>
+<a href="zmq_msg_close.html">zmq_msg_close(3)</a>
+<a href="zmq_msg_data.html">zmq_msg_data(3)</a>
+<a href="zmq_msg_size.html">zmq_msg_size(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_init_data.txt b/doc/zmq_msg_init_data.txt new file mode 100644 index 0000000..48bcbe9 --- /dev/null +++ b/doc/zmq_msg_init_data.txt @@ -0,0 +1,85 @@ +zmq_msg_init_data(3) +==================== + + +NAME +---- +zmq_msg_init_data - initialise 0MQ message from a supplied buffer + + +SYNOPSIS +-------- +*typedef void (zmq_free_fn) (void '*data', void '*hint');* + +*int zmq_msg_init_data (zmq_msg_t '*msg', void '*data', size_t 'size', zmq_free_fn '*ffn', void '*hint');* + + +DESCRIPTION +----------- +The _zmq_msg_init_data()_ function shall initialise the message object +referenced by 'msg' to represent the content referenced by the buffer located +at address 'data', 'size' bytes long. No copy of 'data' shall be performed and +0MQ shall take ownership of the supplied buffer. + +If provided, the deallocation function 'ffn' shall be called once the data +buffer is no longer required by 0MQ, with the 'data' and 'hint' arguments +supplied to _zmq_msg_init_data()_. + +CAUTION: Never access 'zmq_msg_t' members directly, instead always use the +_zmq_msg_ family of functions. + +CAUTION: The deallocation function 'ffn' needs to be thread-safe, since it +will be called from an arbitrary thread. + +CAUTION: The functions _zmq_msg_init()_, _zmq_msg_init_data()_ and +_zmq_msg_init_size()_ are mutually exclusive. Never initialize the same +'zmq_msg_t' twice. + + +RETURN VALUE +------------ +The _zmq_msg_init_data()_ function shall return zero if successful. Otherwise +it shall return `-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +*ENOMEM*:: +Insufficient storage space is available. + + + +EXAMPLE +------- +.Initialising a message from a supplied buffer +---- +void my_free (void *data, void *hint) +{ + free (data); +} + + /* ... */ + +void *data = malloc (6); +assert (data); +memcpy (data, "ABCDEF", 6); +zmq_msg_t msg; +rc = zmq_msg_init_data (&msg, data, 6, my_free, NULL); +assert (rc == 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_msg_init_size[3] +linkzmq:zmq_msg_init[3] +linkzmq:zmq_msg_close[3] +linkzmq:zmq_msg_data[3] +linkzmq:zmq_msg_size[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_msg_init_size.3 b/doc/zmq_msg_init_size.3 new file mode 100644 index 0000000..504a9fc --- /dev/null +++ b/doc/zmq_msg_init_size.3 @@ -0,0 +1,97 @@ +'\" t +.\" Title: zmq_msg_init_size +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_INIT_SIZE" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_init_size \- initialise 0MQ message of a specified size +.SH "SYNOPSIS" +.sp +\fBint zmq_msg_init_size (zmq_msg_t \fR\fB\fI*msg\fR\fR\fB, size_t \fR\fB\fIsize\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_init_size()\fR function shall allocate any resources required to store a message \fIsize\fR bytes long and initialise the message object referenced by \fImsg\fR to represent the newly allocated message\&. +.sp +The implementation shall choose whether to store message content on the stack (small messages) or on the heap (large messages)\&. For performance reasons \fIzmq_msg_init_size()\fR shall not clear the message data\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +Never access \fIzmq_msg_t\fR members directly, instead always use the \fIzmq_msg\fR family of functions\&. +.sp .5v +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +The functions \fIzmq_msg_init()\fR, \fIzmq_msg_init_data()\fR and \fIzmq_msg_init_size()\fR are mutually exclusive\&. Never initialize the same \fIzmq_msg_t\fR twice\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_msg_init_size()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBENOMEM\fR +.RS 4 +Insufficient storage space is available\&. +.RE +.SH "SEE ALSO" +.sp +\fBzmq_msg_init_data\fR(3) \fBzmq_msg_init\fR(3) \fBzmq_msg_close\fR(3) \fBzmq_msg_data\fR(3) \fBzmq_msg_size\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_msg_init_size.html b/doc/zmq_msg_init_size.html new file mode 100644 index 0000000..c2fc7d6 --- /dev/null +++ b/doc/zmq_msg_init_size.html @@ -0,0 +1,834 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_msg_init_size(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_init_size -
+ initialise 0MQ message of a specified size
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_msg_init_size (zmq_msg_t <em>*msg</em>, size_t <em>size</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_init_size()</em> function shall allocate any resources required to
+store a message <em>size</em> bytes long and initialise the message object referenced
+by <em>msg</em> to represent the newly allocated message.</p></div>
+<div class="paragraph"><p>The implementation shall choose whether to store message content on the stack
+(small messages) or on the heap (large messages). For performance reasons
+<em>zmq_msg_init_size()</em> shall not clear the message data.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">Never access <em>zmq_msg_t</em> members directly, instead always use the
+<em>zmq_msg</em> family of functions.</td>
+</tr></table>
+</div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">The functions <em>zmq_msg_init()</em>, <em>zmq_msg_init_data()</em> and
+<em>zmq_msg_init_size()</em> are mutually exclusive. Never initialize the same
+<em>zmq_msg_t</em> twice.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_init_size()</em> function shall return zero if successful. Otherwise
+it shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ENOMEM</strong>
+</dt>
+<dd>
+<p>
+Insufficient storage space is available.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_msg_init_data.html">zmq_msg_init_data(3)</a>
+<a href="zmq_msg_init.html">zmq_msg_init(3)</a>
+<a href="zmq_msg_close.html">zmq_msg_close(3)</a>
+<a href="zmq_msg_data.html">zmq_msg_data(3)</a>
+<a href="zmq_msg_size.html">zmq_msg_size(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_init_size.txt b/doc/zmq_msg_init_size.txt new file mode 100644 index 0000000..9be6263 --- /dev/null +++ b/doc/zmq_msg_init_size.txt @@ -0,0 +1,58 @@ +zmq_msg_init_size(3) +==================== + + +NAME +---- +zmq_msg_init_size - initialise 0MQ message of a specified size + + +SYNOPSIS +-------- +*int zmq_msg_init_size (zmq_msg_t '*msg', size_t 'size');* + + +DESCRIPTION +----------- +The _zmq_msg_init_size()_ function shall allocate any resources required to +store a message 'size' bytes long and initialise the message object referenced +by 'msg' to represent the newly allocated message. + +The implementation shall choose whether to store message content on the stack +(small messages) or on the heap (large messages). For performance reasons +_zmq_msg_init_size()_ shall not clear the message data. + +CAUTION: Never access 'zmq_msg_t' members directly, instead always use the +_zmq_msg_ family of functions. + +CAUTION: The functions _zmq_msg_init()_, _zmq_msg_init_data()_ and +_zmq_msg_init_size()_ are mutually exclusive. Never initialize the same +'zmq_msg_t' twice. + + +RETURN VALUE +------------ +The _zmq_msg_init_size()_ function shall return zero if successful. Otherwise +it shall return `-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +*ENOMEM*:: +Insufficient storage space is available. + + +SEE ALSO +-------- +linkzmq:zmq_msg_init_data[3] +linkzmq:zmq_msg_init[3] +linkzmq:zmq_msg_close[3] +linkzmq:zmq_msg_data[3] +linkzmq:zmq_msg_size[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_msg_more.3 b/doc/zmq_msg_more.3 new file mode 100644 index 0000000..d084afc --- /dev/null +++ b/doc/zmq_msg_more.3 @@ -0,0 +1,86 @@ +'\" t +.\" Title: zmq_msg_more +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_MORE" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_more \- indicate if there are more message parts to receive +.SH "SYNOPSIS" +.sp +\fBint zmq_msg_more (zmq_msg_t \fR\fB\fI*message\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_more()\fR function indicates whether this is part of a multi\-part message, and there are further parts to receive\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_msg_more()\fR function shall return zero if this is the final part of a multi\-part message, or the only part of a single\-part message\&. It shall return 1 if there are further parts to receive\&. +.SH "EXAMPLE" +.PP +\fBReceiving a multi-part message\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +zmq_msg_t part; +while (true) { + // Create an empty 0MQ message to hold the message part + int rc = zmq_msg_init (&part); + assert (rc == 0); + // Block until a message is available to be received from socket + rc = zmq_recvmsg (socket, &part, 0); + assert (rc != \-1); + if (zmq_msg_more (&part)) + fprintf (stderr, "more\en"); + else { + fprintf (stderr, "end\en"); + break; + } + zmq_msg_close (part); +} +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_msg_get\fR(3) \fBzmq_msg_set\fR(3) \fBzmq_msg_init\fR(3) \fBzmq_msg_close\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Chuck Remes <\m[blue]\fBcremes@mac\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +cremes@mac.com +.RS 4 +\%mailto:cremes@mac.com +.RE +.IP " 2." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_msg_more.html b/doc/zmq_msg_more.html new file mode 100644 index 0000000..7f29a41 --- /dev/null +++ b/doc/zmq_msg_more.html @@ -0,0 +1,821 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<div id="header">
+<h1>
+zmq_msg_more(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_more -
+ indicate if there are more message parts to receive
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_msg_more (zmq_msg_t <em>*message</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_more()</em> function indicates whether this is part of a multi-part
+message, and there are further parts to receive.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_more()</em> function shall return zero if this is the final part of
+a multi-part message, or the only part of a single-part message. It shall
+return 1 if there are further parts to receive.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Receiving a multi-part message</div>
+<div class="content">
+<pre><tt>zmq_msg_t part;
+while (true) {
+ // Create an empty 0MQ message to hold the message part
+ int rc = zmq_msg_init (&part);
+ assert (rc == 0);
+ // Block until a message is available to be received from socket
+ rc = zmq_recvmsg (socket, &part, 0);
+ assert (rc != -1);
+ if (zmq_msg_more (&part))
+ fprintf (stderr, "more\n");
+ else {
+ fprintf (stderr, "end\n");
+ break;
+ }
+ zmq_msg_close (part);
+}</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_msg_get.html">zmq_msg_get(3)</a>
+<a href="zmq_msg_set.html">zmq_msg_set(3)</a>
+<a href="zmq_msg_init.html">zmq_msg_init(3)</a>
+<a href="zmq_msg_close.html">zmq_msg_close(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Chuck Remes <<a href="mailto:cremes@mac.com">cremes@mac.com</a>> and Pieter
+Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_more.txt b/doc/zmq_msg_more.txt new file mode 100644 index 0000000..7836872 --- /dev/null +++ b/doc/zmq_msg_more.txt @@ -0,0 +1,63 @@ +zmq_msg_more(3) +=============== + + +NAME +---- +zmq_msg_more - indicate if there are more message parts to receive + + +SYNOPSIS +-------- +*int zmq_msg_more (zmq_msg_t '*message');* + + +DESCRIPTION +----------- +The _zmq_msg_more()_ function indicates whether this is part of a multi-part +message, and there are further parts to receive. + + +RETURN VALUE +------------ +The _zmq_msg_more()_ function shall return zero if this is the final part of +a multi-part message, or the only part of a single-part message. It shall +return 1 if there are further parts to receive. + + +EXAMPLE +------- +.Receiving a multi-part message +---- +zmq_msg_t part; +while (true) { + // Create an empty 0MQ message to hold the message part + int rc = zmq_msg_init (&part); + assert (rc == 0); + // Block until a message is available to be received from socket + rc = zmq_recvmsg (socket, &part, 0); + assert (rc != -1); + if (zmq_msg_more (&part)) + fprintf (stderr, "more\n"); + else { + fprintf (stderr, "end\n"); + break; + } + zmq_msg_close (part); +} +---- + + +SEE ALSO +-------- +linkzmq:zmq_msg_get[3] +linkzmq:zmq_msg_set[3] +linkzmq:zmq_msg_init[3] +linkzmq:zmq_msg_close[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Chuck Remes <cremes@mac.com> and Pieter +Hintjens <ph@imatix.com>. diff --git a/doc/zmq_msg_move.3 b/doc/zmq_msg_move.3 new file mode 100644 index 0000000..7eebab1 --- /dev/null +++ b/doc/zmq_msg_move.3 @@ -0,0 +1,79 @@ +'\" t +.\" Title: zmq_msg_move +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_MOVE" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_move \- move content of a message to another message +.SH "SYNOPSIS" +.sp +\fBint zmq_msg_move (zmq_msg_t \fR\fB\fI*dest\fR\fR\fB, zmq_msg_t \fR\fB\fI*src\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_move()\fR function shall move the content of the message object referenced by \fIsrc\fR to the message object referenced by \fIdest\fR\&. No actual copying of message content is performed, \fIdest\fR is simply updated to reference the new content\&. \fIsrc\fR becomes an empty message after calling \fIzmq_msg_move()\fR\&. The original content of \fIdest\fR, if any, shall be released\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +Never access \fIzmq_msg_t\fR members directly, instead always use the \fIzmq_msg\fR family of functions\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_msg_move()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEFAULT\fR +.RS 4 +Invalid message\&. +.RE +.SH "SEE ALSO" +.sp +\fBzmq_msg_copy\fR(3) \fBzmq_msg_init\fR(3) \fBzmq_msg_init_size\fR(3) \fBzmq_msg_init_data\fR(3) \fBzmq_msg_close\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_msg_move.html b/doc/zmq_msg_move.html new file mode 100644 index 0000000..25c8575 --- /dev/null +++ b/doc/zmq_msg_move.html @@ -0,0 +1,823 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_msg_move(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_move -
+ move content of a message to another message
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_msg_move (zmq_msg_t <em>*dest</em>, zmq_msg_t <em>*src</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_move()</em> function shall move the content of the message object
+referenced by <em>src</em> to the message object referenced by <em>dest</em>. No actual
+copying of message content is performed, <em>dest</em> is simply updated to reference
+the new content. <em>src</em> becomes an empty message after calling <em>zmq_msg_move()</em>.
+The original content of <em>dest</em>, if any, shall be released.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">Never access <em>zmq_msg_t</em> members directly, instead always use the
+<em>zmq_msg</em> family of functions.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_move()</em> function shall return zero if successful. Otherwise it
+shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EFAULT</strong>
+</dt>
+<dd>
+<p>
+Invalid message.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_msg_copy.html">zmq_msg_copy(3)</a>
+<a href="zmq_msg_init.html">zmq_msg_init(3)</a>
+<a href="zmq_msg_init_size.html">zmq_msg_init_size(3)</a>
+<a href="zmq_msg_init_data.html">zmq_msg_init_data(3)</a>
+<a href="zmq_msg_close.html">zmq_msg_close(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_move.txt b/doc/zmq_msg_move.txt new file mode 100644 index 0000000..6ab6eab --- /dev/null +++ b/doc/zmq_msg_move.txt @@ -0,0 +1,52 @@ +zmq_msg_move(3) +=============== + + +NAME +---- +zmq_msg_move - move content of a message to another message + + +SYNOPSIS +-------- +*int zmq_msg_move (zmq_msg_t '*dest', zmq_msg_t '*src');* + + +DESCRIPTION +----------- +The _zmq_msg_move()_ function shall move the content of the message object +referenced by 'src' to the message object referenced by 'dest'. No actual +copying of message content is performed, 'dest' is simply updated to reference +the new content. 'src' becomes an empty message after calling _zmq_msg_move()_. +The original content of 'dest', if any, shall be released. + +CAUTION: Never access 'zmq_msg_t' members directly, instead always use the +_zmq_msg_ family of functions. + + +RETURN VALUE +------------ +The _zmq_msg_move()_ function shall return zero if successful. Otherwise it +shall return `-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +*EFAULT*:: +Invalid message. + + +SEE ALSO +-------- +linkzmq:zmq_msg_copy[3] +linkzmq:zmq_msg_init[3] +linkzmq:zmq_msg_init_size[3] +linkzmq:zmq_msg_init_data[3] +linkzmq:zmq_msg_close[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_msg_recv.3 b/doc/zmq_msg_recv.3 new file mode 100644 index 0000000..3f47a8b --- /dev/null +++ b/doc/zmq_msg_recv.3 @@ -0,0 +1,177 @@ +'\" t +.\" Title: zmq_msg_recv +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_RECV" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_recv \- receive a message part from a socket +.SH "SYNOPSIS" +.sp +\fBint zmq_msg_recv (zmq_msg_t \fR\fB\fI*msg\fR\fR\fB, void \fR\fB\fI*socket\fR\fR\fB, int \fR\fB\fIflags\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_recv()\fR function is identical to \fBzmq_recvmsg\fR(3), which shall be deprecated in future versions\&. \fIzmq_msg_recv()\fR is more consistent with other message manipulation functions\&. +.sp +The \fIzmq_msg_recv()\fR function shall receive a message part from the socket referenced by the \fIsocket\fR argument and store it in the message referenced by the \fImsg\fR argument\&. Any content previously stored in \fImsg\fR shall be properly deallocated\&. If there are no message parts available on the specified \fIsocket\fR the \fIzmq_msg_recv()\fR function shall block until the request can be satisfied\&. The \fIflags\fR argument is a combination of the flags defined below: +.PP +\fBZMQ_DONTWAIT\fR +.RS 4 +Specifies that the operation should be performed in non\-blocking mode\&. If there are no messages available on the specified +\fIsocket\fR, the +\fIzmq_msg_recv()\fR +function shall fail with +\fIerrno\fR +set to EAGAIN\&. +.RE +.SS "Multi\-part messages" +.sp +A 0MQ message is composed of 1 or more message parts\&. Each message part is an independent \fIzmq_msg_t\fR in its own right\&. 0MQ ensures atomic delivery of messages: peers shall receive either all \fImessage parts\fR of a message or none at all\&. The total number of message parts is unlimited except by available memory\&. +.sp +An application that processes multi\-part messages must use the \fIZMQ_RCVMORE\fR \fBzmq_getsockopt\fR(3) option after calling \fIzmq_msg_recv()\fR to determine if there are further parts to receive\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_msg_recv()\fR function shall return number of bytes in the message if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEAGAIN\fR +.RS 4 +Non\-blocking mode was requested and no messages are available at the moment\&. +.RE +.PP +\fBENOTSUP\fR +.RS 4 +The +\fIzmq_msg_recv()\fR +operation is not supported by this socket type\&. +.RE +.PP +\fBEFSM\fR +.RS 4 +The +\fIzmq_msg_recv()\fR +operation cannot be performed on this socket at the moment due to the socket not being in the appropriate state\&. This error may occur with socket types that switch between several states, such as ZMQ_REP\&. See the +\fImessaging patterns\fR +section of +\fBzmq_socket\fR(3) +for more information\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.PP +\fBEINTR\fR +.RS 4 +The operation was interrupted by delivery of a signal before a message was available\&. +.RE +.PP +\fBEFAULT\fR +.RS 4 +The message passed to the function was invalid\&. +.RE +.SH "EXAMPLE" +.PP +\fBReceiving a message from a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Create an empty 0MQ message */ +zmq_msg_t msg; +int rc = zmq_msg_init (&msg); +assert (rc == 0); +/* Block until a message is available to be received from socket */ +rc = zmq_msg_recv (&msg, socket, 0); +assert (rc != \-1); +/* Release message */ +zmq_msg_close (&msg); +.fi +.if n \{\ +.RE +.\} +.PP +\fBReceiving a multi-part message\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +int64_t more; +size_t more_size = sizeof more; +do { + /* Create an empty 0MQ message to hold the message part */ + zmq_msg_t part; + int rc = zmq_msg_init (&part); + assert (rc == 0); + /* Block until a message is available to be received from socket */ + rc = zmq_msg_recv (&part, socket, 0); + assert (rc != \-1); + /* Determine if more message parts are to follow */ + rc = zmq_getsockopt (socket, ZMQ_RCVMORE, &more, &more_size); + assert (rc == 0); + zmq_msg_close (&part); +} while (more); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_recv\fR(3) \fBzmq_send\fR(3) \fBzmq_msg_send\fR(3) \fBzmq_getsockopt\fR(3) \fBzmq_socket\fR(7) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This man page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Lucina <\m[blue]\fBmartin@lucina\&.net\fR\m[]\&\s-2\u[2]\d\s+2>, and Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +martin@lucina.net +.RS 4 +\%mailto:martin@lucina.net +.RE +.IP " 3." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_msg_recv.html b/doc/zmq_msg_recv.html new file mode 100644 index 0000000..46caf8b --- /dev/null +++ b/doc/zmq_msg_recv.html @@ -0,0 +1,931 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<div id="header">
+<h1>
+zmq_msg_recv(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_recv -
+ receive a message part from a socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_msg_recv (zmq_msg_t <em>*msg</em>, void <em>*socket</em>, int <em>flags</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_recv()</em> function is identical to <a href="zmq_recvmsg.html">zmq_recvmsg(3)</a>, which
+shall be deprecated in future versions. <em>zmq_msg_recv()</em> is more consistent
+with other message manipulation functions.</p></div>
+<div class="paragraph"><p>The <em>zmq_msg_recv()</em> function shall receive a message part from the socket
+referenced by the <em>socket</em> argument and store it in the message referenced by
+the <em>msg</em> argument. Any content previously stored in <em>msg</em> shall be properly
+deallocated. If there are no message parts available on the specified <em>socket</em>
+the <em>zmq_msg_recv()</em> function shall block until the request can be satisfied.
+The <em>flags</em> argument is a combination of the flags defined below:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ZMQ_DONTWAIT</strong>
+</dt>
+<dd>
+<p>
+Specifies that the operation should be performed in non-blocking mode. If there
+are no messages available on the specified <em>socket</em>, the <em>zmq_msg_recv()</em>
+function shall fail with <em>errno</em> set to EAGAIN.
+</p>
+</dd>
+</dl></div>
+<div class="sect2">
+<h3 id="_multi_part_messages">Multi-part messages</h3>
+<div class="paragraph"><p>A ØMQ message is composed of 1 or more message parts. Each message
+part is an independent <em>zmq_msg_t</em> in its own right. ØMQ ensures atomic
+delivery of messages: peers shall receive either all <em>message parts</em> of a
+message or none at all. The total number of message parts is unlimited except
+by available memory.</p></div>
+<div class="paragraph"><p>An application that processes multi-part messages must use the <em>ZMQ_RCVMORE</em>
+<a href="zmq_getsockopt.html">zmq_getsockopt(3)</a> option after calling <em>zmq_msg_recv()</em> to determine if
+there are further parts to receive.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_recv()</em> function shall return number of bytes in the message
+if successful. Otherwise it shall return <tt>-1</tt> and set <em>errno</em> to one of the
+values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EAGAIN</strong>
+</dt>
+<dd>
+<p>
+Non-blocking mode was requested and no messages are available at the moment.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSUP</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_msg_recv()</em> operation is not supported by this socket type.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFSM</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_msg_recv()</em> operation cannot be performed on this socket at the moment
+due to the socket not being in the appropriate state. This error may occur with
+socket types that switch between several states, such as ZMQ_REP. See the
+<em>messaging patterns</em> section of <a href="zmq_socket.html">zmq_socket(3)</a> for more information.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINTR</strong>
+</dt>
+<dd>
+<p>
+The operation was interrupted by delivery of a signal before a message was
+available.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFAULT</strong>
+</dt>
+<dd>
+<p>
+The message passed to the function was invalid.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Receiving a message from a socket</div>
+<div class="content">
+<pre><tt>/* Create an empty 0MQ message */
+zmq_msg_t msg;
+int rc = zmq_msg_init (&msg);
+assert (rc == 0);
+/* Block until a message is available to be received from socket */
+rc = zmq_msg_recv (&msg, socket, 0);
+assert (rc != -1);
+/* Release message */
+zmq_msg_close (&msg);</tt></pre>
+</div></div>
+<div class="listingblock">
+<div class="title">Receiving a multi-part message</div>
+<div class="content">
+<pre><tt>int64_t more;
+size_t more_size = sizeof more;
+do {
+ /* Create an empty 0MQ message to hold the message part */
+ zmq_msg_t part;
+ int rc = zmq_msg_init (&part);
+ assert (rc == 0);
+ /* Block until a message is available to be received from socket */
+ rc = zmq_msg_recv (&part, socket, 0);
+ assert (rc != -1);
+ /* Determine if more message parts are to follow */
+ rc = zmq_getsockopt (socket, ZMQ_RCVMORE, &more, &more_size);
+ assert (rc == 0);
+ zmq_msg_close (&part);
+} while (more);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_recv.html">zmq_recv(3)</a>
+<a href="zmq_send.html">zmq_send(3)</a>
+<a href="zmq_msg_send.html">zmq_msg_send(3)</a>
+<a href="zmq_getsockopt.html">zmq_getsockopt(3)</a>
+<a href="zmq_socket.html">zmq_socket(7)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This man page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>>, Martin
+Lucina <<a href="mailto:martin@lucina.net">martin@lucina.net</a>>, and Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_recv.txt b/doc/zmq_msg_recv.txt new file mode 100644 index 0000000..db16346 --- /dev/null +++ b/doc/zmq_msg_recv.txt @@ -0,0 +1,125 @@ +zmq_msg_recv(3) +=============== + + +NAME +---- +zmq_msg_recv - receive a message part from a socket + + +SYNOPSIS +-------- +*int zmq_msg_recv (zmq_msg_t '*msg', void '*socket', int 'flags');* + + +DESCRIPTION +----------- +The _zmq_msg_recv()_ function is identical to linkzmq:zmq_recvmsg[3], which +shall be deprecated in future versions. _zmq_msg_recv()_ is more consistent +with other message manipulation functions. + +The _zmq_msg_recv()_ function shall receive a message part from the socket +referenced by the 'socket' argument and store it in the message referenced by +the 'msg' argument. Any content previously stored in 'msg' shall be properly +deallocated. If there are no message parts available on the specified 'socket' +the _zmq_msg_recv()_ function shall block until the request can be satisfied. +The 'flags' argument is a combination of the flags defined below: + +*ZMQ_DONTWAIT*:: +Specifies that the operation should be performed in non-blocking mode. If there +are no messages available on the specified 'socket', the _zmq_msg_recv()_ +function shall fail with 'errno' set to EAGAIN. + + +Multi-part messages +~~~~~~~~~~~~~~~~~~~ +A 0MQ message is composed of 1 or more message parts. Each message +part is an independent 'zmq_msg_t' in its own right. 0MQ ensures atomic +delivery of messages: peers shall receive either all _message parts_ of a +message or none at all. The total number of message parts is unlimited except +by available memory. + +An application that processes multi-part messages must use the _ZMQ_RCVMORE_ +linkzmq:zmq_getsockopt[3] option after calling _zmq_msg_recv()_ to determine if +there are further parts to receive. + + +RETURN VALUE +------------ +The _zmq_msg_recv()_ function shall return number of bytes in the message +if successful. Otherwise it shall return `-1` and set 'errno' to one of the +values defined below. + + +ERRORS +------ +*EAGAIN*:: +Non-blocking mode was requested and no messages are available at the moment. +*ENOTSUP*:: +The _zmq_msg_recv()_ operation is not supported by this socket type. +*EFSM*:: +The _zmq_msg_recv()_ operation cannot be performed on this socket at the moment +due to the socket not being in the appropriate state. This error may occur with +socket types that switch between several states, such as ZMQ_REP. See the +_messaging patterns_ section of linkzmq:zmq_socket[3] for more information. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. +*EINTR*:: +The operation was interrupted by delivery of a signal before a message was +available. +*EFAULT*:: +The message passed to the function was invalid. + + +EXAMPLE +------- +.Receiving a message from a socket +---- +/* Create an empty 0MQ message */ +zmq_msg_t msg; +int rc = zmq_msg_init (&msg); +assert (rc == 0); +/* Block until a message is available to be received from socket */ +rc = zmq_msg_recv (&msg, socket, 0); +assert (rc != -1); +/* Release message */ +zmq_msg_close (&msg); +---- + +.Receiving a multi-part message +---- +int64_t more; +size_t more_size = sizeof more; +do { + /* Create an empty 0MQ message to hold the message part */ + zmq_msg_t part; + int rc = zmq_msg_init (&part); + assert (rc == 0); + /* Block until a message is available to be received from socket */ + rc = zmq_msg_recv (&part, socket, 0); + assert (rc != -1); + /* Determine if more message parts are to follow */ + rc = zmq_getsockopt (socket, ZMQ_RCVMORE, &more, &more_size); + assert (rc == 0); + zmq_msg_close (&part); +} while (more); +---- + + +SEE ALSO +-------- +linkzmq:zmq_recv[3] +linkzmq:zmq_send[3] +linkzmq:zmq_msg_send[3] +linkzmq:zmq_getsockopt[3] +linkzmq:zmq_socket[7] +linkzmq:zmq[7] + + +AUTHORS +------- +This man page was written by Martin Sustrik <sustrik@250bpm.com>, Martin +Lucina <martin@lucina.net>, and Pieter Hintjens <ph@imatix.com>. + diff --git a/doc/zmq_msg_send.3 b/doc/zmq_msg_send.3 new file mode 100644 index 0000000..2d35fe9 --- /dev/null +++ b/doc/zmq_msg_send.3 @@ -0,0 +1,190 @@ +'\" t +.\" Title: zmq_msg_send +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_SEND" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_send \- send a message part on a socket +.SH "SYNOPSIS" +.sp +\fBint zmq_msg_send (zmq_msg_t \fR\fB\fI*msg\fR\fR\fB, void \fR\fB\fI*socket\fR\fR\fB, int \fR\fB\fIflags\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_send()\fR function is identical to \fBzmq_sendmsg\fR(3), which shall be deprecated in future versions\&. \fIzmq_msg_send()\fR is more consistent with other message manipulation functions\&. +.sp +The \fIzmq_msg_send()\fR function shall queue the message referenced by the \fImsg\fR argument to be sent to the socket referenced by the \fIsocket\fR argument\&. The \fIflags\fR argument is a combination of the flags defined below: +.PP +\fBZMQ_DONTWAIT\fR +.RS 4 +Specifies that the operation should be performed in non\-blocking mode\&. If the message cannot be queued on the +\fIsocket\fR, the +\fIzmq_msg_send()\fR +function shall fail with +\fIerrno\fR +set to EAGAIN\&. +.RE +.PP +\fBZMQ_SNDMORE\fR +.RS 4 +Specifies that the message being sent is a multi\-part message, and that further message parts are to follow\&. Refer to the section regarding multi\-part messages below for a detailed description\&. +.RE +.sp +The \fIzmq_msg_t\fR structure passed to \fIzmq_msg_send()\fR is nullified during the call\&. If you want to send the same message to multiple sockets you have to copy it using (e\&.g\&. using \fIzmq_msg_copy()\fR)\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +A successful invocation of \fIzmq_msg_send()\fR does not indicate that the message has been transmitted to the network, only that it has been queued on the \fIsocket\fR and 0MQ has assumed responsibility for the message\&. +.sp .5v +.RE +.SS "Multi\-part messages" +.sp +A 0MQ message is composed of 1 or more message parts\&. Each message part is an independent \fIzmq_msg_t\fR in its own right\&. 0MQ ensures atomic delivery of messages: peers shall receive either all \fImessage parts\fR of a message or none at all\&. The total number of message parts is unlimited except by available memory\&. +.sp +An application that sends multi\-part messages must use the \fIZMQ_SNDMORE\fR flag when sending each message part except the final one\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_msg_send()\fR function shall return number of bytes in the message if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEAGAIN\fR +.RS 4 +Non\-blocking mode was requested and the message cannot be sent at the moment\&. +.RE +.PP +\fBENOTSUP\fR +.RS 4 +The +\fIzmq_msg_send()\fR +operation is not supported by this socket type\&. +.RE +.PP +\fBEFSM\fR +.RS 4 +The +\fIzmq_msg_send()\fR +operation cannot be performed on this socket at the moment due to the socket not being in the appropriate state\&. This error may occur with socket types that switch between several states, such as ZMQ_REP\&. See the +\fImessaging patterns\fR +section of +\fBzmq_socket\fR(3) +for more information\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.PP +\fBEINTR\fR +.RS 4 +The operation was interrupted by delivery of a signal before the message was sent\&. +.RE +.PP +\fBEFAULT\fR +.RS 4 +Invalid message\&. +.RE +.SH "EXAMPLE" +.PP +\fBFilling in a message and sending it to a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Create a new message, allocating 6 bytes for message content */ +zmq_msg_t msg; +int rc = zmq_msg_init_size (&msg, 6); +assert (rc == 0); +/* Fill in message content with \*(AqAAAAAA\*(Aq */ +memset (zmq_msg_data (&msg), \*(AqA\*(Aq, 6); +/* Send the message to the socket */ +rc = zmq_msg_send (&msg, socket, 0); +assert (rc == 6); +.fi +.if n \{\ +.RE +.\} +.PP +\fBSending a multi-part message\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Send a multi\-part message consisting of three parts to socket */ +rc = zmq_msg_send (&part1, socket, ZMQ_SNDMORE); +rc = zmq_msg_send (&part2, socket, ZMQ_SNDMORE); +/* Final part; no more parts to follow */ +rc = zmq_msg_send (&part3, socket, 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_recv\fR(3) \fBzmq_send\fR(3) \fBzmq_msg_recv\fR(3) \fBzmq_socket\fR(7) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>, and Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE +.IP " 3." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_msg_send.html b/doc/zmq_msg_send.html new file mode 100644 index 0000000..89a7cc2 --- /dev/null +++ b/doc/zmq_msg_send.html @@ -0,0 +1,939 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<div id="header">
+<h1>
+zmq_msg_send(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_send -
+ send a message part on a socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_msg_send (zmq_msg_t <em>*msg</em>, void <em>*socket</em>, int <em>flags</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_send()</em> function is identical to <a href="zmq_sendmsg.html">zmq_sendmsg(3)</a>, which
+shall be deprecated in future versions. <em>zmq_msg_send()</em> is more consistent
+with other message manipulation functions.</p></div>
+<div class="paragraph"><p>The <em>zmq_msg_send()</em> function shall queue the message referenced by the <em>msg</em>
+argument to be sent to the socket referenced by the <em>socket</em> argument. The
+<em>flags</em> argument is a combination of the flags defined below:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ZMQ_DONTWAIT</strong>
+</dt>
+<dd>
+<p>
+Specifies that the operation should be performed in non-blocking mode. If the
+message cannot be queued on the <em>socket</em>, the <em>zmq_msg_send()</em> function shall
+fail with <em>errno</em> set to EAGAIN.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ZMQ_SNDMORE</strong>
+</dt>
+<dd>
+<p>
+Specifies that the message being sent is a multi-part message, and that further
+message parts are to follow. Refer to the section regarding multi-part messages
+below for a detailed description.
+</p>
+</dd>
+</dl></div>
+<div class="paragraph"><p>The <em>zmq_msg_t</em> structure passed to <em>zmq_msg_send()</em> is nullified during the
+call. If you want to send the same message to multiple sockets you have to copy
+it using (e.g. using <em>zmq_msg_copy()</em>).</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">A successful invocation of <em>zmq_msg_send()</em> does not indicate that the
+message has been transmitted to the network, only that it has been queued on
+the <em>socket</em> and ØMQ has assumed responsibility for the message.</td>
+</tr></table>
+</div>
+<div class="sect2">
+<h3 id="_multi_part_messages">Multi-part messages</h3>
+<div class="paragraph"><p>A ØMQ message is composed of 1 or more message parts. Each message
+part is an independent <em>zmq_msg_t</em> in its own right. ØMQ ensures atomic
+delivery of messages: peers shall receive either all <em>message parts</em> of a
+message or none at all. The total number of message parts is unlimited except
+by available memory.</p></div>
+<div class="paragraph"><p>An application that sends multi-part messages must use the <em>ZMQ_SNDMORE</em> flag
+when sending each message part except the final one.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_send()</em> function shall return number of bytes in the message
+if successful. Otherwise it shall return <tt>-1</tt> and set <em>errno</em> to one of the
+values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EAGAIN</strong>
+</dt>
+<dd>
+<p>
+Non-blocking mode was requested and the message cannot be sent at the moment.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSUP</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_msg_send()</em> operation is not supported by this socket type.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFSM</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_msg_send()</em> operation cannot be performed on this socket at the moment
+due to the socket not being in the appropriate state. This error may occur with
+socket types that switch between several states, such as ZMQ_REP. See the
+<em>messaging patterns</em> section of <a href="zmq_socket.html">zmq_socket(3)</a> for more information.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINTR</strong>
+</dt>
+<dd>
+<p>
+The operation was interrupted by delivery of a signal before the message was
+sent.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFAULT</strong>
+</dt>
+<dd>
+<p>
+Invalid message.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Filling in a message and sending it to a socket</div>
+<div class="content">
+<pre><tt>/* Create a new message, allocating 6 bytes for message content */
+zmq_msg_t msg;
+int rc = zmq_msg_init_size (&msg, 6);
+assert (rc == 0);
+/* Fill in message content with 'AAAAAA' */
+memset (zmq_msg_data (&msg), 'A', 6);
+/* Send the message to the socket */
+rc = zmq_msg_send (&msg, socket, 0);
+assert (rc == 6);</tt></pre>
+</div></div>
+<div class="listingblock">
+<div class="title">Sending a multi-part message</div>
+<div class="content">
+<pre><tt>/* Send a multi-part message consisting of three parts to socket */
+rc = zmq_msg_send (&part1, socket, ZMQ_SNDMORE);
+rc = zmq_msg_send (&part2, socket, ZMQ_SNDMORE);
+/* Final part; no more parts to follow */
+rc = zmq_msg_send (&part3, socket, 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_recv.html">zmq_recv(3)</a>
+<a href="zmq_send.html">zmq_send(3)</a>
+<a href="zmq_msg_recv.html">zmq_msg_recv(3)</a>
+<a href="zmq_socket.html">zmq_socket(7)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>, and Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_send.txt b/doc/zmq_msg_send.txt new file mode 100644 index 0000000..a5b335c --- /dev/null +++ b/doc/zmq_msg_send.txt @@ -0,0 +1,122 @@ +zmq_msg_send(3) +=============== + + +NAME +---- +zmq_msg_send - send a message part on a socket + + +SYNOPSIS +-------- +*int zmq_msg_send (zmq_msg_t '*msg', void '*socket', int 'flags');* + + +DESCRIPTION +----------- +The _zmq_msg_send()_ function is identical to linkzmq:zmq_sendmsg[3], which +shall be deprecated in future versions. _zmq_msg_send()_ is more consistent +with other message manipulation functions. + +The _zmq_msg_send()_ function shall queue the message referenced by the 'msg' +argument to be sent to the socket referenced by the 'socket' argument. The +'flags' argument is a combination of the flags defined below: + +*ZMQ_DONTWAIT*:: +Specifies that the operation should be performed in non-blocking mode. If the +message cannot be queued on the 'socket', the _zmq_msg_send()_ function shall +fail with 'errno' set to EAGAIN. + +*ZMQ_SNDMORE*:: +Specifies that the message being sent is a multi-part message, and that further +message parts are to follow. Refer to the section regarding multi-part messages +below for a detailed description. + +The _zmq_msg_t_ structure passed to _zmq_msg_send()_ is nullified during the +call. If you want to send the same message to multiple sockets you have to copy +it using (e.g. using _zmq_msg_copy()_). + +NOTE: A successful invocation of _zmq_msg_send()_ does not indicate that the +message has been transmitted to the network, only that it has been queued on +the 'socket' and 0MQ has assumed responsibility for the message. + + +Multi-part messages +~~~~~~~~~~~~~~~~~~~ +A 0MQ message is composed of 1 or more message parts. Each message +part is an independent 'zmq_msg_t' in its own right. 0MQ ensures atomic +delivery of messages: peers shall receive either all _message parts_ of a +message or none at all. The total number of message parts is unlimited except +by available memory. + +An application that sends multi-part messages must use the _ZMQ_SNDMORE_ flag +when sending each message part except the final one. + +RETURN VALUE +------------ +The _zmq_msg_send()_ function shall return number of bytes in the message +if successful. Otherwise it shall return `-1` and set 'errno' to one of the +values defined below. + + +ERRORS +------ +*EAGAIN*:: +Non-blocking mode was requested and the message cannot be sent at the moment. +*ENOTSUP*:: +The _zmq_msg_send()_ operation is not supported by this socket type. +*EFSM*:: +The _zmq_msg_send()_ operation cannot be performed on this socket at the moment +due to the socket not being in the appropriate state. This error may occur with +socket types that switch between several states, such as ZMQ_REP. See the +_messaging patterns_ section of linkzmq:zmq_socket[3] for more information. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. +*EINTR*:: +The operation was interrupted by delivery of a signal before the message was +sent. +*EFAULT*:: +Invalid message. + + +EXAMPLE +------- +.Filling in a message and sending it to a socket +---- +/* Create a new message, allocating 6 bytes for message content */ +zmq_msg_t msg; +int rc = zmq_msg_init_size (&msg, 6); +assert (rc == 0); +/* Fill in message content with 'AAAAAA' */ +memset (zmq_msg_data (&msg), 'A', 6); +/* Send the message to the socket */ +rc = zmq_msg_send (&msg, socket, 0); +assert (rc == 6); +---- + +.Sending a multi-part message +---- +/* Send a multi-part message consisting of three parts to socket */ +rc = zmq_msg_send (&part1, socket, ZMQ_SNDMORE); +rc = zmq_msg_send (&part2, socket, ZMQ_SNDMORE); +/* Final part; no more parts to follow */ +rc = zmq_msg_send (&part3, socket, 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_recv[3] +linkzmq:zmq_send[3] +linkzmq:zmq_msg_recv[3] +linkzmq:zmq_socket[7] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>, and Pieter Hintjens <ph@imatix.com>. + diff --git a/doc/zmq_msg_set.3 b/doc/zmq_msg_set.3 new file mode 100644 index 0000000..01290fe --- /dev/null +++ b/doc/zmq_msg_set.3 @@ -0,0 +1,62 @@ +'\" t +.\" Title: zmq_msg_set +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_SET" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_set \- set message property +.SH "SYNOPSIS" +.sp +\fBint zmq_msg_set (zmq_msg_t \fR\fB\fI*message\fR\fR\fB, int \fR\fB\fIproperty\fR\fR\fB, int \fR\fB\fIvalue\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_set()\fR function shall set the property specified by the \fIproperty\fR argument to the value of the \fIvalue\fR argument for the 0MQ message fragment pointed to by the \fImessage\fR argument\&. +.sp +Currently the \fIzmq_msg_set()\fR function does not support any property names\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_msg_set()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +The requested property +\fIproperty\fR +is unknown\&. +.RE +.SH "SEE ALSO" +.sp +\fBzmq_msg_get\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_msg_set.html b/doc/zmq_msg_set.html new file mode 100644 index 0000000..f830bd7 --- /dev/null +++ b/doc/zmq_msg_set.html @@ -0,0 +1,808 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_msg_set(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_set -
+ set message property
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_msg_set (zmq_msg_t <em>*message</em>, int <em>property</em>, int <em>value</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_set()</em> function shall set the property specified by the
+<em>property</em> argument to the value of the <em>value</em> argument for the ØMQ
+message fragment pointed to by the <em>message</em> argument.</p></div>
+<div class="paragraph"><p>Currently the <em>zmq_msg_set()</em> function does not support any property names.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_set()</em> function shall return zero if successful. Otherwise it
+shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The requested property <em>property</em> is unknown.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_msg_get.html">zmq_msg_get(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_set.txt b/doc/zmq_msg_set.txt new file mode 100644 index 0000000..2569387 --- /dev/null +++ b/doc/zmq_msg_set.txt @@ -0,0 +1,45 @@ +zmq_msg_set(3) +============== + + +NAME +---- + +zmq_msg_set - set message property + + +SYNOPSIS +-------- +*int zmq_msg_set (zmq_msg_t '*message', int 'property', int 'value');* + + +DESCRIPTION +----------- +The _zmq_msg_set()_ function shall set the property specified by the +'property' argument to the value of the 'value' argument for the 0MQ +message fragment pointed to by the 'message' argument. + +Currently the _zmq_msg_set()_ function does not support any property names. + + +RETURN VALUE +------------ +The _zmq_msg_set()_ function shall return zero if successful. Otherwise it +shall return `-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +*EINVAL*:: +The requested property _property_ is unknown. + + +SEE ALSO +-------- +linkzmq:zmq_msg_get[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com>. diff --git a/doc/zmq_msg_size.3 b/doc/zmq_msg_size.3 new file mode 100644 index 0000000..0a70208 --- /dev/null +++ b/doc/zmq_msg_size.3 @@ -0,0 +1,81 @@ +'\" t +.\" Title: zmq_msg_size +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_MSG_SIZE" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_msg_size \- retrieve message content size in bytes +.SH "SYNOPSIS" +.sp +\fBsize_t zmq_msg_size (zmq_msg_t \fR\fB\fI*msg\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_msg_size()\fR function shall return the size in bytes of the content of the message object referenced by \fImsg\fR\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +Never access \fIzmq_msg_t\fR members directly, instead always use the \fIzmq_msg\fR family of functions\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +Upon successful completion, \fIzmq_msg_size()\fR shall return the size of the message content in bytes\&. +.SH "ERRORS" +.sp +No errors are defined\&. +.SH "SEE ALSO" +.sp +\fBzmq_msg_data\fR(3) \fBzmq_msg_init\fR(3) \fBzmq_msg_init_size\fR(3) \fBzmq_msg_init_data\fR(3) \fBzmq_msg_close\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>, and Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE +.IP " 3." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_msg_size.html b/doc/zmq_msg_size.html new file mode 100644 index 0000000..170b420 --- /dev/null +++ b/doc/zmq_msg_size.html @@ -0,0 +1,811 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_msg_size(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_msg_size -
+ retrieve message content size in bytes
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>size_t zmq_msg_size (zmq_msg_t <em>*msg</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_msg_size()</em> function shall return the size in bytes of the content of
+the message object referenced by <em>msg</em>.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">Never access <em>zmq_msg_t</em> members directly, instead always use the
+<em>zmq_msg</em> family of functions.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Upon successful completion, <em>zmq_msg_size()</em> shall return the size of the
+message content in bytes.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>No errors are defined.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_msg_data.html">zmq_msg_data(3)</a>
+<a href="zmq_msg_init.html">zmq_msg_init(3)</a>
+<a href="zmq_msg_init_size.html">zmq_msg_init_size(3)</a>
+<a href="zmq_msg_init_data.html">zmq_msg_init_data(3)</a>
+<a href="zmq_msg_close.html">zmq_msg_close(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>>,
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>, and Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_msg_size.txt b/doc/zmq_msg_size.txt new file mode 100644 index 0000000..08d7415 --- /dev/null +++ b/doc/zmq_msg_size.txt @@ -0,0 +1,48 @@ +zmq_msg_size(3) +=============== + + +NAME +---- +zmq_msg_size - retrieve message content size in bytes + + +SYNOPSIS +-------- +*size_t zmq_msg_size (zmq_msg_t '*msg');* + + +DESCRIPTION +----------- +The _zmq_msg_size()_ function shall return the size in bytes of the content of +the message object referenced by 'msg'. + +CAUTION: Never access 'zmq_msg_t' members directly, instead always use the +_zmq_msg_ family of functions. + + +RETURN VALUE +------------ +Upon successful completion, _zmq_msg_size()_ shall return the size of the +message content in bytes. + + +ERRORS +------ +No errors are defined. + + +SEE ALSO +-------- +linkzmq:zmq_msg_data[3] +linkzmq:zmq_msg_init[3] +linkzmq:zmq_msg_init_size[3] +linkzmq:zmq_msg_init_data[3] +linkzmq:zmq_msg_close[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com>, +Martin Lucina <mato@kotelna.sk>, and Pieter Hintjens <ph@imatix.com>. diff --git a/doc/zmq_pgm.7 b/doc/zmq_pgm.7 new file mode 100644 index 0000000..57d1d05 --- /dev/null +++ b/doc/zmq_pgm.7 @@ -0,0 +1,216 @@ +'\" t +.\" Title: zmq_pgm +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_PGM" "7" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_pgm \- 0MQ reliable multicast transport using PGM +.SH "SYNOPSIS" +.sp +PGM (Pragmatic General Multicast) is a protocol for reliable multicast transport of data over IP networks\&. +.SH "DESCRIPTION" +.sp +0MQ implements two variants of PGM, the standard protocol where PGM datagrams are layered directly on top of IP datagrams as defined by RFC 3208 (the \fIpgm\fR transport) and "Encapsulated PGM" or EPGM where PGM datagrams are encapsulated inside UDP datagrams (the \fIepgm\fR transport)\&. +.sp +The \fIpgm\fR and \fIepgm\fR transports can only be used with the \fIZMQ_PUB\fR and \fIZMQ_SUB\fR socket types\&. +.sp +Further, PGM sockets are rate limited by default\&. For details, refer to the \fIZMQ_RATE\fR, and \fIZMQ_RECOVERY_IVL\fR options documented in \fBzmq_setsockopt\fR(3)\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +The \fIpgm\fR transport implementation requires access to raw IP sockets\&. Additional privileges may be required on some operating systems for this operation\&. Applications not requiring direct interoperability with other PGM implementations are encouraged to use the \fIepgm\fR transport instead which does not require any special privileges\&. +.sp .5v +.RE +.SH "ADDRESSING" +.sp +A 0MQ endpoint is a string consisting of a \fItransport\fR:// followed by an \fIaddress\fR\&. The \fItransport\fR specifies the underlying protocol to use\&. The \fIaddress\fR specifies the transport\-specific address to connect to\&. +.sp +For the PGM transport, the transport is pgm, and for the EPGM protocol the transport is epgm\&. The meaning of the \fIaddress\fR part is defined below\&. +.SS "Connecting a socket" +.sp +When connecting a socket to a peer address using \fIzmq_connect()\fR with the \fIpgm\fR or \fIepgm\fR transport, the \fIendpoint\fR shall be interpreted as an \fIinterface\fR followed by a semicolon, followed by a \fImulticast address\fR, followed by a colon and a port number\&. +.sp +An \fIinterface\fR may be specified by either of the following: +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The interface name as defined by the operating system\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The primary IPv4 address assigned to the interface, in it\(cqs numeric representation\&. +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +Interface names are not standardised in any way and should be assumed to be arbitrary and platform dependent\&. On Win32 platforms no short interface names exist, thus only the primary IPv4 address may be used to specify an \fIinterface\fR\&. The \fIinterface\fR part can be omitted, in that case the default one will be selected\&. +.sp .5v +.RE +.sp +A \fImulticast address\fR is specified by an IPv4 multicast address in it\(cqs numeric representation\&. +.SH "WIRE FORMAT" +.sp +Consecutive PGM datagrams are interpreted by 0MQ as a single continuous stream of data where 0MQ messages are not necessarily aligned with PGM datagram boundaries and a single 0MQ message may span several PGM datagrams\&. This stream of data consists of 0MQ messages encapsulated in \fIframes\fR as described in \fBzmq_tcp\fR(7)\&. +.SS "PGM datagram payload" +.sp +The following ABNF grammar represents the payload of a single PGM datagram as used by 0MQ: +.sp +.if n \{\ +.RS 4 +.\} +.nf +datagram = (offset data) +offset = 2OCTET +data = *OCTET +.fi +.if n \{\ +.RE +.\} +.sp +In order for late joining consumers to be able to identify message boundaries, each PGM datagram payload starts with a 16\-bit unsigned integer in network byte order specifying either the offset of the first message \fIframe\fR in the datagram or containing the value 0xFFFF if the datagram contains solely an intermediate part of a larger message\&. +.sp +Note that offset specifies where the first message begins rather than the first message part\&. Thus, if there are trailing message parts at the beginning of the packet the offset ignores them and points to first initial message part in the packet\&. +.sp +The following diagram illustrates the layout of a single PGM datagram payload: +.sp +.if n \{\ +.RS 4 +.\} +.nf ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ +| offset (16 bits) | data | ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ +.fi +.if n \{\ +.RE +.\} +.sp +The following diagram further illustrates how three example 0MQ frames are laid out in consecutive PGM datagram payloads: +.sp +.if n \{\ +.RS 4 +.\} +.nf +First datagram payload ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ +| Frame offset | Frame 1 | Frame 2, part 1 | +| 0x0000 | (Message 1) | (Message 2, part 1) | ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ + +Second datagram payload ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ +| Frame offset | Frame 2, part 2 | +| 0xFFFF | (Message 2, part 2) | ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+ + +Third datagram payload ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-+ +| Frame offset | Frame 2, final 8 bytes | Frame 3 | +| 0x0008 | (Message 2, final 8 bytes) | (Message 3) | ++\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-+ +.fi +.if n \{\ +.RE +.\} +.SH "EXAMPLE" +.PP +\fBConnecting a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +// Connecting to the multicast address 239\&.192\&.1\&.1, port 5555, +// using the first Ethernet network interface on Linux +// and the Encapsulated PGM protocol +rc = zmq_connect(socket, "epgm://eth0;239\&.192\&.1\&.1:5555"); +assert (rc == 0); +// Connecting to the multicast address 239\&.192\&.1\&.1, port 5555, +// using the network interface with the address 192\&.168\&.1\&.1 +// and the standard PGM protocol +rc = zmq_connect(socket, "pgm://192\&.168\&.1\&.1;239\&.192\&.1\&.1:5555"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_connect\fR(3) \fBzmq_setsockopt\fR(3) \fBzmq_tcp\fR(7) \fBzmq_ipc\fR(7) \fBzmq_inproc\fR(7) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[2]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE +.IP " 2." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 3." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_pgm.html b/doc/zmq_pgm.html new file mode 100644 index 0000000..849e31a --- /dev/null +++ b/doc/zmq_pgm.html @@ -0,0 +1,932 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_pgm(7) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_pgm -
+ 0MQ reliable multicast transport using PGM
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>PGM (Pragmatic General Multicast) is a protocol for reliable multicast
+transport of data over IP networks.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>ØMQ implements two variants of PGM, the standard protocol where PGM datagrams
+are layered directly on top of IP datagrams as defined by RFC 3208 (the <em>pgm</em>
+transport) and "Encapsulated PGM" or EPGM where PGM datagrams are encapsulated
+inside UDP datagrams (the <em>epgm</em> transport).</p></div>
+<div class="paragraph"><p>The <em>pgm</em> and <em>epgm</em> transports can only be used with the <em>ZMQ_PUB</em> and
+<em>ZMQ_SUB</em> socket types.</p></div>
+<div class="paragraph"><p>Further, PGM sockets are rate limited by default. For details, refer to the
+<em>ZMQ_RATE</em>, and <em>ZMQ_RECOVERY_IVL</em> options documented in
+<a href="zmq_setsockopt.html">zmq_setsockopt(3)</a>.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">The <em>pgm</em> transport implementation requires access to raw IP sockets.
+Additional privileges may be required on some operating systems for this
+operation. Applications not requiring direct interoperability with other PGM
+implementations are encouraged to use the <em>epgm</em> transport instead which does
+not require any special privileges.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_addressing">ADDRESSING</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>A ØMQ endpoint is a string consisting of a <em>transport</em><tt>://</tt> followed by an
+<em>address</em>. The <em>transport</em> specifies the underlying protocol to use. The
+<em>address</em> specifies the transport-specific address to connect to.</p></div>
+<div class="paragraph"><p>For the PGM transport, the transport is <tt>pgm</tt>, and for the EPGM protocol the
+transport is <tt>epgm</tt>. The meaning of the <em>address</em> part is defined below.</p></div>
+<div class="sect2">
+<h3 id="_connecting_a_socket">Connecting a socket</h3>
+<div class="paragraph"><p>When connecting a socket to a peer address using <em>zmq_connect()</em> with the <em>pgm</em>
+or <em>epgm</em> transport, the <em>endpoint</em> shall be interpreted as an <em>interface</em>
+followed by a semicolon, followed by a <em>multicast address</em>, followed by a colon
+and a port number.</p></div>
+<div class="paragraph"><p>An <em>interface</em> may be specified by either of the following:</p></div>
+<div class="ulist"><ul>
+<li>
+<p>
+The interface name as defined by the operating system.
+</p>
+</li>
+<li>
+<p>
+The primary IPv4 address assigned to the interface, in it’s numeric
+ representation.
+</p>
+</li>
+</ul></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">Interface names are not standardised in any way and should be assumed to
+be arbitrary and platform dependent. On Win32 platforms no short interface
+names exist, thus only the primary IPv4 address may be used to specify an
+<em>interface</em>. The <em>interface</em> part can be omitted, in that case the default one
+will be selected.</td>
+</tr></table>
+</div>
+<div class="paragraph"><p>A <em>multicast address</em> is specified by an IPv4 multicast address in it’s numeric
+representation.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_wire_format">WIRE FORMAT</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Consecutive PGM datagrams are interpreted by ØMQ as a single continuous stream
+of data where ØMQ messages are not necessarily aligned with PGM datagram
+boundaries and a single ØMQ message may span several PGM datagrams. This stream
+of data consists of ØMQ messages encapsulated in <em>frames</em> as described in
+<a href="zmq_tcp.html">zmq_tcp(7)</a>.</p></div>
+<div class="sect2">
+<h3 id="_pgm_datagram_payload">PGM datagram payload</h3>
+<div class="paragraph"><p>The following ABNF grammar represents the payload of a single PGM datagram as
+used by ØMQ:</p></div>
+<div class="literalblock">
+<div class="content">
+<pre><tt>datagram = (offset data)
+offset = 2OCTET
+data = *OCTET</tt></pre>
+</div></div>
+<div class="paragraph"><p>In order for late joining consumers to be able to identify message boundaries,
+each PGM datagram payload starts with a 16-bit unsigned integer in network byte
+order specifying either the offset of the first message <em>frame</em> in the datagram
+or containing the value <tt>0xFFFF</tt> if the datagram contains solely an
+intermediate part of a larger message.</p></div>
+<div class="paragraph"><p>Note that offset specifies where the first message begins rather than the first
+message part. Thus, if there are trailing message parts at the beginning of
+the packet the offset ignores them and points to first initial message part
+in the packet.</p></div>
+<div class="paragraph"><p>The following diagram illustrates the layout of a single PGM datagram payload:</p></div>
+<div class="literalblock">
+<div class="content">
+<pre><tt>+------------------+----------------------+
+| offset (16 bits) | data |
++------------------+----------------------+</tt></pre>
+</div></div>
+<div class="paragraph"><p>The following diagram further illustrates how three example ØMQ frames are laid
+out in consecutive PGM datagram payloads:</p></div>
+<div class="literalblock">
+<div class="content">
+<pre><tt>First datagram payload
++--------------+-------------+---------------------+
+| Frame offset | Frame 1 | Frame 2, part 1 |
+| 0x0000 | (Message 1) | (Message 2, part 1) |
++--------------+-------------+---------------------+
+
+Second datagram payload
++--------------+---------------------+
+| Frame offset | Frame 2, part 2 |
+| 0xFFFF | (Message 2, part 2) |
++--------------+---------------------+
+
+Third datagram payload
++--------------+----------------------------+-------------+
+| Frame offset | Frame 2, final 8 bytes | Frame 3 |
+| 0x0008 | (Message 2, final 8 bytes) | (Message 3) |
++--------------+----------------------------+-------------+</tt></pre>
+</div></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Connecting a socket</div>
+<div class="content">
+<pre><tt>// Connecting to the multicast address 239.192.1.1, port 5555,
+// using the first Ethernet network interface on Linux
+// and the Encapsulated PGM protocol
+rc = zmq_connect(socket, "epgm://eth0;239.192.1.1:5555");
+assert (rc == 0);
+// Connecting to the multicast address 239.192.1.1, port 5555,
+// using the network interface with the address 192.168.1.1
+// and the standard PGM protocol
+rc = zmq_connect(socket, "pgm://192.168.1.1;239.192.1.1:5555");
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_connect.html">zmq_connect(3)</a>
+<a href="zmq_setsockopt.html">zmq_setsockopt(3)</a>
+<a href="zmq_tcp.html">zmq_tcp(7)</a>
+<a href="zmq_ipc.html">zmq_ipc(7)</a>
+<a href="zmq_inproc.html">zmq_inproc(7)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>,
+Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-11-14 10:09:14 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_pgm.txt b/doc/zmq_pgm.txt new file mode 100644 index 0000000..7b6b985 --- /dev/null +++ b/doc/zmq_pgm.txt @@ -0,0 +1,162 @@ +zmq_pgm(7) +========== + + +NAME +---- +zmq_pgm - 0MQ reliable multicast transport using PGM + + +SYNOPSIS +-------- +PGM (Pragmatic General Multicast) is a protocol for reliable multicast +transport of data over IP networks. + + +DESCRIPTION +----------- +0MQ implements two variants of PGM, the standard protocol where PGM datagrams +are layered directly on top of IP datagrams as defined by RFC 3208 (the 'pgm' +transport) and "Encapsulated PGM" or EPGM where PGM datagrams are encapsulated +inside UDP datagrams (the 'epgm' transport). + +The 'pgm' and 'epgm' transports can only be used with the 'ZMQ_PUB' and +'ZMQ_SUB' socket types. + +Further, PGM sockets are rate limited by default. For details, refer to the +'ZMQ_RATE', and 'ZMQ_RECOVERY_IVL' options documented in +linkzmq:zmq_setsockopt[3]. + +CAUTION: The 'pgm' transport implementation requires access to raw IP sockets. +Additional privileges may be required on some operating systems for this +operation. Applications not requiring direct interoperability with other PGM +implementations are encouraged to use the 'epgm' transport instead which does +not require any special privileges. + + +ADDRESSING +---------- +A 0MQ endpoint is a string consisting of a 'transport'`://` followed by an +'address'. The 'transport' specifies the underlying protocol to use. The +'address' specifies the transport-specific address to connect to. + +For the PGM transport, the transport is `pgm`, and for the EPGM protocol the +transport is `epgm`. The meaning of the 'address' part is defined below. + + +Connecting a socket +~~~~~~~~~~~~~~~~~~~ +When connecting a socket to a peer address using _zmq_connect()_ with the 'pgm' +or 'epgm' transport, the 'endpoint' shall be interpreted as an 'interface' +followed by a semicolon, followed by a 'multicast address', followed by a colon +and a port number. + +An 'interface' may be specified by either of the following: + +* The interface name as defined by the operating system. +* The primary IPv4 address assigned to the interface, in it's numeric + representation. + +NOTE: Interface names are not standardised in any way and should be assumed to +be arbitrary and platform dependent. On Win32 platforms no short interface +names exist, thus only the primary IPv4 address may be used to specify an +'interface'. The 'interface' part can be omitted, in that case the default one +will be selected. + +A 'multicast address' is specified by an IPv4 multicast address in it's numeric +representation. + + +WIRE FORMAT +----------- +Consecutive PGM datagrams are interpreted by 0MQ as a single continuous stream +of data where 0MQ messages are not necessarily aligned with PGM datagram +boundaries and a single 0MQ message may span several PGM datagrams. This stream +of data consists of 0MQ messages encapsulated in 'frames' as described in +linkzmq:zmq_tcp[7]. + + +PGM datagram payload +~~~~~~~~~~~~~~~~~~~~ +The following ABNF grammar represents the payload of a single PGM datagram as +used by 0MQ: + +.... +datagram = (offset data) +offset = 2OCTET +data = *OCTET +.... + +In order for late joining consumers to be able to identify message boundaries, +each PGM datagram payload starts with a 16-bit unsigned integer in network byte +order specifying either the offset of the first message 'frame' in the datagram +or containing the value `0xFFFF` if the datagram contains solely an +intermediate part of a larger message. + +Note that offset specifies where the first message begins rather than the first +message part. Thus, if there are trailing message parts at the beginning of +the packet the offset ignores them and points to first initial message part +in the packet. + +The following diagram illustrates the layout of a single PGM datagram payload: + +.... ++------------------+----------------------+ +| offset (16 bits) | data | ++------------------+----------------------+ +.... + +The following diagram further illustrates how three example 0MQ frames are laid +out in consecutive PGM datagram payloads: + +.... +First datagram payload ++--------------+-------------+---------------------+ +| Frame offset | Frame 1 | Frame 2, part 1 | +| 0x0000 | (Message 1) | (Message 2, part 1) | ++--------------+-------------+---------------------+ + +Second datagram payload ++--------------+---------------------+ +| Frame offset | Frame 2, part 2 | +| 0xFFFF | (Message 2, part 2) | ++--------------+---------------------+ + +Third datagram payload ++--------------+----------------------------+-------------+ +| Frame offset | Frame 2, final 8 bytes | Frame 3 | +| 0x0008 | (Message 2, final 8 bytes) | (Message 3) | ++--------------+----------------------------+-------------+ +.... + + +EXAMPLE +------- +.Connecting a socket +---- +// Connecting to the multicast address 239.192.1.1, port 5555, +// using the first Ethernet network interface on Linux +// and the Encapsulated PGM protocol +rc = zmq_connect(socket, "epgm://eth0;239.192.1.1:5555"); +assert (rc == 0); +// Connecting to the multicast address 239.192.1.1, port 5555, +// using the network interface with the address 192.168.1.1 +// and the standard PGM protocol +rc = zmq_connect(socket, "pgm://192.168.1.1;239.192.1.1:5555"); +assert (rc == 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_connect[3] +linkzmq:zmq_setsockopt[3] +linkzmq:zmq_tcp[7] +linkzmq:zmq_ipc[7] +linkzmq:zmq_inproc[7] +linkzmq:zmq[7] + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com>, +Martin Sustrik <sustrik@250bpm.com> and Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_poll.3 b/doc/zmq_poll.3 new file mode 100644 index 0000000..843a50e --- /dev/null +++ b/doc/zmq_poll.3 @@ -0,0 +1,204 @@ +'\" t +.\" Title: zmq_poll +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_POLL" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_poll \- input/output multiplexing +.SH "SYNOPSIS" +.sp +\fBint zmq_poll (zmq_pollitem_t \fR\fB\fI*items\fR\fR\fB, int \fR\fB\fInitems\fR\fR\fB, long \fR\fB\fItimeout\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_poll()\fR function provides a mechanism for applications to multiplex input/output events in a level\-triggered fashion over a set of sockets\&. Each member of the array pointed to by the \fIitems\fR argument is a \fBzmq_pollitem_t\fR structure\&. The \fInitems\fR argument specifies the number of items in the \fIitems\fR array\&. The \fBzmq_pollitem_t\fR structure is defined as follows: +.sp +.if n \{\ +.RS 4 +.\} +.nf +typedef struct +{ + void \fI*socket\fR; + int \fIfd\fR; + short \fIevents\fR; + short \fIrevents\fR; +} zmq_pollitem_t; +.fi +.if n \{\ +.RE +.\} +.sp +For each \fBzmq_pollitem_t\fR item, \fIzmq_poll()\fR shall examine either the 0MQ socket referenced by \fIsocket\fR \fBor\fR the standard socket specified by the file descriptor \fIfd\fR, for the event(s) specified in \fIevents\fR\&. If both \fIsocket\fR and \fIfd\fR are set in a single \fBzmq_pollitem_t\fR, the 0MQ socket referenced by \fIsocket\fR shall take precedence and the value of \fIfd\fR shall be ignored\&. +.sp +For each \fBzmq_pollitem_t\fR item, \fIzmq_poll()\fR shall first clear the \fIrevents\fR member, and then indicate any requested events that have occurred by setting the bit corresponding to the event condition in the \fIrevents\fR member\&. +.sp +If none of the requested events have occurred on any \fBzmq_pollitem_t\fR item, \fIzmq_poll()\fR shall wait \fItimeout\fR milliseconds for an event to occur on any of the requested items\&. If the value of \fItimeout\fR is 0, \fIzmq_poll()\fR shall return immediately\&. If the value of \fItimeout\fR is \-1, \fIzmq_poll()\fR shall block indefinitely until a requested event has occurred on at least one \fBzmq_pollitem_t\fR\&. +.sp +The \fIevents\fR and \fIrevents\fR members of \fBzmq_pollitem_t\fR are bit masks constructed by OR\(cqing a combination of the following event flags: +.PP +\fBZMQ_POLLIN\fR +.RS 4 +For 0MQ sockets, at least one message may be received from the +\fIsocket\fR +without blocking\&. For standard sockets this is equivalent to the +\fIPOLLIN\fR +flag of the +\fIpoll()\fR +system call and generally means that at least one byte of data may be read from +\fIfd\fR +without blocking\&. +.RE +.PP +\fBZMQ_POLLOUT\fR +.RS 4 +For 0MQ sockets, at least one message may be sent to the +\fIsocket\fR +without blocking\&. For standard sockets this is equivalent to the +\fIPOLLOUT\fR +flag of the +\fIpoll()\fR +system call and generally means that at least one byte of data may be written to +\fIfd\fR +without blocking\&. +.RE +.PP +\fBZMQ_POLLERR\fR +.RS 4 +For standard sockets, this flag is passed through +\fIzmq_poll()\fR +to the underlying +\fIpoll()\fR +system call and generally means that some sort of error condition is present on the socket specified by +\fIfd\fR\&. For 0MQ sockets this flag has no effect if set in +\fIevents\fR, and shall never be returned in +\fIrevents\fR +by +\fIzmq_poll()\fR\&. +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +The \fIzmq_poll()\fR function may be implemented or emulated using operating system interfaces other than \fIpoll()\fR, and as such may be subject to the limits of those interfaces in ways not defined in this documentation\&. +.sp .5v +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +The \fIzmq_send()\fR function will clear all pending events on a socket\&. Thus, if you use \fIzmq_poll()\fR to monitor input on a socket, use it before output as well, and process all events after each \fIzmq_poll()\fR call\&. +.sp .5v +.RE +.SH "RETURN VALUE" +.sp +Upon successful completion, the \fIzmq_poll()\fR function shall return the number of \fBzmq_pollitem_t\fR structures with events signaled in \fIrevents\fR or 0 if no events have been signaled\&. Upon failure, \fIzmq_poll()\fR shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBETERM\fR +.RS 4 +At least one of the members of the +\fIitems\fR +array refers to a +\fIsocket\fR +whose associated 0MQ +\fIcontext\fR +was terminated\&. +.RE +.PP +\fBEFAULT\fR +.RS 4 +The provided +\fIitems\fR +was not valid (NULL)\&. +.RE +.PP +\fBEINTR\fR +.RS 4 +The operation was interrupted by delivery of a signal before any events were available\&. +.RE +.SH "EXAMPLE" +.PP +\fBPolling indefinitely for input events on both a 0MQ socket and a standard socket.\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +zmq_pollitem_t items [2]; +/* First item refers to 0MQ socket \*(Aqsocket\*(Aq */ +items[0]\&.socket = socket; +items[0]\&.events = ZMQ_POLLIN; +/* Second item refers to standard socket \*(Aqfd\*(Aq */ +items[1]\&.socket = NULL; +items[1]\&.fd = fd; +items[1]\&.events = ZMQ_POLLIN; +/* Poll for events indefinitely */ +int rc = zmq_poll (items, 2, \-1); +assert (rc >= 0); +/* Returned events will be stored in items[]\&.revents */ +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_socket\fR(3) \fBzmq_send\fR(3) \fBzmq_recv\fR(3) \fBzmq\fR(7) +.sp +Your operating system documentation for the \fIpoll()\fR system call\&. +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_poll.html b/doc/zmq_poll.html new file mode 100644 index 0000000..e5410d0 --- /dev/null +++ b/doc/zmq_poll.html @@ -0,0 +1,936 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_poll(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_poll -
+ input/output multiplexing
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_poll (zmq_pollitem_t <em>*items</em>, int <em>nitems</em>, long <em>timeout</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_poll()</em> function provides a mechanism for applications to multiplex
+input/output events in a level-triggered fashion over a set of sockets. Each
+member of the array pointed to by the <em>items</em> argument is a <strong>zmq_pollitem_t</strong>
+structure. The <em>nitems</em> argument specifies the number of items in the <em>items</em>
+array. The <strong>zmq_pollitem_t</strong> structure is defined as follows:</p></div>
+<div class="literalblock">
+<div class="content">
+<pre><tt>typedef struct
+{
+ void <em>*socket</em>;
+ int <em>fd</em>;
+ short <em>events</em>;
+ short <em>revents</em>;
+} zmq_pollitem_t;</tt></pre>
+</div></div>
+<div class="paragraph"><p>For each <strong>zmq_pollitem_t</strong> item, <em>zmq_poll()</em> shall examine either the ØMQ
+socket referenced by <em>socket</em> <strong>or</strong> the standard socket specified by the file
+descriptor <em>fd</em>, for the event(s) specified in <em>events</em>. If both <em>socket</em> and
+<em>fd</em> are set in a single <strong>zmq_pollitem_t</strong>, the ØMQ socket referenced by
+<em>socket</em> shall take precedence and the value of <em>fd</em> shall be ignored.</p></div>
+<div class="paragraph"><p>For each <strong>zmq_pollitem_t</strong> item, <em>zmq_poll()</em> shall first clear the <em>revents</em>
+member, and then indicate any requested events that have occurred by setting the
+bit corresponding to the event condition in the <em>revents</em> member.</p></div>
+<div class="paragraph"><p>If none of the requested events have occurred on any <strong>zmq_pollitem_t</strong> item,
+<em>zmq_poll()</em> shall wait <em>timeout</em> milliseconds for an event to occur on
+any of the requested items. If the value of <em>timeout</em> is <tt>0</tt>, <em>zmq_poll()</em>
+shall return immediately. If the value of <em>timeout</em> is <tt>-1</tt>, <em>zmq_poll()</em> shall
+block indefinitely until a requested event has occurred on at least one
+<strong>zmq_pollitem_t</strong>.</p></div>
+<div class="paragraph"><p>The <em>events</em> and <em>revents</em> members of <strong>zmq_pollitem_t</strong> are bit masks constructed
+by OR’ing a combination of the following event flags:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ZMQ_POLLIN</strong>
+</dt>
+<dd>
+<p>
+For ØMQ sockets, at least one message may be received from the <em>socket</em> without
+blocking. For standard sockets this is equivalent to the <em>POLLIN</em> flag of the
+<em>poll()</em> system call and generally means that at least one byte of data may be
+read from <em>fd</em> without blocking.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ZMQ_POLLOUT</strong>
+</dt>
+<dd>
+<p>
+For ØMQ sockets, at least one message may be sent to the <em>socket</em> without
+blocking. For standard sockets this is equivalent to the <em>POLLOUT</em> flag of the
+<em>poll()</em> system call and generally means that at least one byte of data may be
+written to <em>fd</em> without blocking.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ZMQ_POLLERR</strong>
+</dt>
+<dd>
+<p>
+For standard sockets, this flag is passed through <em>zmq_poll()</em> to the
+underlying <em>poll()</em> system call and generally means that some sort of error
+condition is present on the socket specified by <em>fd</em>. For ØMQ sockets this flag
+has no effect if set in <em>events</em>, and shall never be returned in <em>revents</em> by
+<em>zmq_poll()</em>.
+</p>
+</dd>
+</dl></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">The <em>zmq_poll()</em> function may be implemented or emulated using operating
+system interfaces other than <em>poll()</em>, and as such may be subject to the limits
+of those interfaces in ways not defined in this documentation.</td>
+</tr></table>
+</div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">The <em>zmq_send()</em> function will clear all pending events on a socket. Thus,
+if you use <em>zmq_poll()</em> to monitor input on a socket, use it before output as
+well, and process all events after each <em>zmq_poll()</em> call.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Upon successful completion, the <em>zmq_poll()</em> function shall return the number
+of <strong>zmq_pollitem_t</strong> structures with events signaled in <em>revents</em> or <tt>0</tt> if no
+events have been signaled. Upon failure, <em>zmq_poll()</em> shall return <tt>-1</tt> and set
+<em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+At least one of the members of the <em>items</em> array refers to a <em>socket</em> whose
+associated ØMQ <em>context</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFAULT</strong>
+</dt>
+<dd>
+<p>
+The provided <em>items</em> was not valid (NULL).
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINTR</strong>
+</dt>
+<dd>
+<p>
+The operation was interrupted by delivery of a signal before any events were
+available.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Polling indefinitely for input events on both a ØMQ socket and a standard socket.</div>
+<div class="content">
+<pre><tt>zmq_pollitem_t items [2];
+/* First item refers to 0MQ socket 'socket' */
+items[0].socket = socket;
+items[0].events = ZMQ_POLLIN;
+/* Second item refers to standard socket 'fd' */
+items[1].socket = NULL;
+items[1].fd = fd;
+items[1].events = ZMQ_POLLIN;
+/* Poll for events indefinitely */
+int rc = zmq_poll (items, 2, -1);
+assert (rc >= 0);
+/* Returned events will be stored in items[].revents */</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_socket.html">zmq_socket(3)</a>
+<a href="zmq_send.html">zmq_send(3)</a>
+<a href="zmq_recv.html">zmq_recv(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+<div class="paragraph"><p>Your operating system documentation for the <em>poll()</em> system call.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_poll.txt b/doc/zmq_poll.txt new file mode 100644 index 0000000..fc6d300 --- /dev/null +++ b/doc/zmq_poll.txt @@ -0,0 +1,132 @@ +zmq_poll(3) +=========== + + +NAME +---- +zmq_poll - input/output multiplexing + + +SYNOPSIS +-------- + +*int zmq_poll (zmq_pollitem_t '*items', int 'nitems', long 'timeout');* + + +DESCRIPTION +----------- +The _zmq_poll()_ function provides a mechanism for applications to multiplex +input/output events in a level-triggered fashion over a set of sockets. Each +member of the array pointed to by the 'items' argument is a *zmq_pollitem_t* +structure. The 'nitems' argument specifies the number of items in the 'items' +array. The *zmq_pollitem_t* structure is defined as follows: + +["literal", subs="quotes"] +typedef struct +{ + void '*socket'; + int 'fd'; + short 'events'; + short 'revents'; +} zmq_pollitem_t; + +For each *zmq_pollitem_t* item, _zmq_poll()_ shall examine either the 0MQ +socket referenced by 'socket' *or* the standard socket specified by the file +descriptor 'fd', for the event(s) specified in 'events'. If both 'socket' and +'fd' are set in a single *zmq_pollitem_t*, the 0MQ socket referenced by +'socket' shall take precedence and the value of 'fd' shall be ignored. + +For each *zmq_pollitem_t* item, _zmq_poll()_ shall first clear the 'revents' +member, and then indicate any requested events that have occurred by setting the +bit corresponding to the event condition in the 'revents' member. + +If none of the requested events have occurred on any *zmq_pollitem_t* item, +_zmq_poll()_ shall wait 'timeout' milliseconds for an event to occur on +any of the requested items. If the value of 'timeout' is `0`, _zmq_poll()_ +shall return immediately. If the value of 'timeout' is `-1`, _zmq_poll()_ shall +block indefinitely until a requested event has occurred on at least one +*zmq_pollitem_t*. + +The 'events' and 'revents' members of *zmq_pollitem_t* are bit masks constructed +by OR'ing a combination of the following event flags: + +*ZMQ_POLLIN*:: +For 0MQ sockets, at least one message may be received from the 'socket' without +blocking. For standard sockets this is equivalent to the 'POLLIN' flag of the +_poll()_ system call and generally means that at least one byte of data may be +read from 'fd' without blocking. + +*ZMQ_POLLOUT*:: +For 0MQ sockets, at least one message may be sent to the 'socket' without +blocking. For standard sockets this is equivalent to the 'POLLOUT' flag of the +_poll()_ system call and generally means that at least one byte of data may be +written to 'fd' without blocking. + +*ZMQ_POLLERR*:: +For standard sockets, this flag is passed through _zmq_poll()_ to the +underlying _poll()_ system call and generally means that some sort of error +condition is present on the socket specified by 'fd'. For 0MQ sockets this flag +has no effect if set in 'events', and shall never be returned in 'revents' by +_zmq_poll()_. + +NOTE: The _zmq_poll()_ function may be implemented or emulated using operating +system interfaces other than _poll()_, and as such may be subject to the limits +of those interfaces in ways not defined in this documentation. + +NOTE: The _zmq_send()_ function will clear all pending events on a socket. Thus, +if you use _zmq_poll()_ to monitor input on a socket, use it before output as +well, and process all events after each _zmq_poll()_ call. + +RETURN VALUE +------------ +Upon successful completion, the _zmq_poll()_ function shall return the number +of *zmq_pollitem_t* structures with events signaled in 'revents' or `0` if no +events have been signaled. Upon failure, _zmq_poll()_ shall return `-1` and set +'errno' to one of the values defined below. + + +ERRORS +------ +*ETERM*:: +At least one of the members of the 'items' array refers to a 'socket' whose +associated 0MQ 'context' was terminated. +*EFAULT*:: +The provided 'items' was not valid (NULL). +*EINTR*:: +The operation was interrupted by delivery of a signal before any events were +available. + + +EXAMPLE +------- +.Polling indefinitely for input events on both a 0MQ socket and a standard socket. +---- +zmq_pollitem_t items [2]; +/* First item refers to 0MQ socket 'socket' */ +items[0].socket = socket; +items[0].events = ZMQ_POLLIN; +/* Second item refers to standard socket 'fd' */ +items[1].socket = NULL; +items[1].fd = fd; +items[1].events = ZMQ_POLLIN; +/* Poll for events indefinitely */ +int rc = zmq_poll (items, 2, -1); +assert (rc >= 0); +/* Returned events will be stored in items[].revents */ +---- + + +SEE ALSO +-------- +linkzmq:zmq_socket[3] +linkzmq:zmq_send[3] +linkzmq:zmq_recv[3] +linkzmq:zmq[7] + +Your operating system documentation for the _poll()_ system call. + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_proxy.3 b/doc/zmq_proxy.3 new file mode 100644 index 0000000..d14dc32 --- /dev/null +++ b/doc/zmq_proxy.3 @@ -0,0 +1,95 @@ +'\" t +.\" Title: zmq_proxy +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_PROXY" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_proxy \- start built\-in 0MQ proxy +.SH "SYNOPSIS" +.sp +\fBint zmq_proxy (const void \fR\fB\fI*frontend\fR\fR\fB, const void \fR\fB\fI*backend\fR\fR\fB, const void \fR\fB\fI*capture\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_proxy()\fR function starts the built\-in 0MQ proxy in the current application thread\&. +.sp +The proxy connects a frontend socket to a backend socket\&. Conceptually, data flows from frontend to backend\&. Depending on the socket types, replies may flow in the opposite direction\&. The direction is conceptual only; the proxy is fully symmetric and there is no technical difference between frontend and backend\&. +.sp +Before calling \fIzmq_proxy()\fR you must set any socket options, and connect or bind both frontend and backend sockets\&. The two conventional proxy models are: +.sp +\fIzmq_proxy()\fR runs in the current thread and returns only if/when the current context is closed\&. +.sp +If the capture socket is not NULL, the proxy shall send all messages, received on both frontend and backend, to the capture socket\&. The capture socket should be a \fIZMQ_PUB\fR, \fIZMQ_DEALER\fR, \fIZMQ_PUSH\fR, or \fIZMQ_PAIR\fR socket\&. +.sp +Refer to \fBzmq_socket\fR(3) for a description of the available socket types\&. +.SH "EXAMPLE USAGE" +.SS "Shared Queue" +.sp +When the frontend is a ZMQ_ROUTER socket, and the backend is a ZMQ_DEALER socket, the proxy shall act as a shared queue that collects requests from a set of clients, and distributes these fairly among a set of services\&. Requests shall be fair\-queued from frontend connections and distributed evenly across backend connections\&. Replies shall automatically return to the client that made the original request\&. +.SS "Forwarder" +.sp +When the frontend is a ZMQ_XSUB socket, and the backend is a ZMQ_XPUB socket, the proxy shall act as a message forwarder that collects messages from a set of publishers and forwards these to a set of subscribers\&. This may be used to bridge networks transports, e\&.g\&. read on tcp:// and forward on pgm://\&. +.SS "Streamer" +.sp +When the frontend is a ZMQ_PULL socket, and the backend is a ZMQ_PUSH socket, the proxy shall collect tasks from a set of clients and forwards these to a set of workers using the pipeline pattern\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_proxy()\fR function always returns \-1 and \fIerrno\fR set to \fBETERM\fR (the 0MQ \fIcontext\fR associated with either of the specified sockets was terminated)\&. +.SH "EXAMPLE" +.PP +\fBCreating a shared queue proxy\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +// Create frontend and backend sockets +void *frontend = zmq_socket (context, ZMQ_ROUTER); +assert (backend); +void *backend = zmq_socket (context, ZMQ_DEALER); +assert (frontend); +// Bind both sockets to TCP ports +assert (zmq_bind (frontend, "tcp://*:5555") == 0); +assert (zmq_bind (backend, "tcp://*:5556") == 0); +// Start the queue proxy, which runs until ETERM +zmq_proxy (frontend, backend, NULL); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_bind\fR(3) \fBzmq_connect\fR(3) \fBzmq_socket\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2> +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_proxy.html b/doc/zmq_proxy.html new file mode 100644 index 0000000..112ba0a --- /dev/null +++ b/doc/zmq_proxy.html @@ -0,0 +1,851 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_proxy(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_proxy -
+ start built-in 0MQ proxy
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_proxy (const void <em>*frontend</em>, const void <em>*backend</em>, const void <em>*capture</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_proxy()</em> function starts the built-in ØMQ proxy in the current
+application thread.</p></div>
+<div class="paragraph"><p>The proxy connects a frontend socket to a backend socket. Conceptually, data
+flows from frontend to backend. Depending on the socket types, replies may flow
+in the opposite direction. The direction is conceptual only; the proxy is fully
+symmetric and there is no technical difference between frontend and backend.</p></div>
+<div class="paragraph"><p>Before calling <em>zmq_proxy()</em> you must set any socket options, and connect or
+bind both frontend and backend sockets. The two conventional proxy models are:</p></div>
+<div class="paragraph"><p><em>zmq_proxy()</em> runs in the current thread and returns only if/when the current
+context is closed.</p></div>
+<div class="paragraph"><p>If the capture socket is not NULL, the proxy shall send all messages, received
+on both frontend and backend, to the capture socket. The capture socket should
+be a <em>ZMQ_PUB</em>, <em>ZMQ_DEALER</em>, <em>ZMQ_PUSH</em>, or <em>ZMQ_PAIR</em> socket.</p></div>
+<div class="paragraph"><p>Refer to <a href="zmq_socket.html">zmq_socket(3)</a> for a description of the available socket types.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example_usage">EXAMPLE USAGE</h2>
+<div class="sectionbody">
+<div class="sect2">
+<h3 id="_shared_queue">Shared Queue</h3>
+<div class="paragraph"><p>When the frontend is a ZMQ_ROUTER socket, and the backend is a ZMQ_DEALER
+socket, the proxy shall act as a shared queue that collects requests from a
+set of clients, and distributes these fairly among a set of services.
+Requests shall be fair-queued from frontend connections and distributed evenly
+across backend connections. Replies shall automatically return to the client
+that made the original request.</p></div>
+</div>
+<div class="sect2">
+<h3 id="_forwarder">Forwarder</h3>
+<div class="paragraph"><p>When the frontend is a ZMQ_XSUB socket, and the backend is a ZMQ_XPUB socket,
+the proxy shall act as a message forwarder that collects messages from a set
+of publishers and forwards these to a set of subscribers. This may be used to
+bridge networks transports, e.g. read on tcp:// and forward on pgm://.</p></div>
+</div>
+<div class="sect2">
+<h3 id="_streamer">Streamer</h3>
+<div class="paragraph"><p>When the frontend is a ZMQ_PULL socket, and the backend is a ZMQ_PUSH socket,
+the proxy shall collect tasks from a set of clients and forwards these to a set
+of workers using the pipeline pattern.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_proxy()</em> function always returns <tt>-1</tt> and <em>errno</em> set to <strong>ETERM</strong> (the
+ØMQ <em>context</em> associated with either of the specified sockets was terminated).</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Creating a shared queue proxy</div>
+<div class="content">
+<pre><tt>// Create frontend and backend sockets
+void *frontend = zmq_socket (context, ZMQ_ROUTER);
+assert (backend);
+void *backend = zmq_socket (context, ZMQ_DEALER);
+assert (frontend);
+// Bind both sockets to TCP ports
+assert (zmq_bind (frontend, "tcp://*:5555") == 0);
+assert (zmq_bind (backend, "tcp://*:5556") == 0);
+// Start the queue proxy, which runs until ETERM
+zmq_proxy (frontend, backend, NULL);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_bind.html">zmq_bind(3)</a>
+<a href="zmq_connect.html">zmq_connect(3)</a>
+<a href="zmq_socket.html">zmq_socket(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>></p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_proxy.txt b/doc/zmq_proxy.txt new file mode 100644 index 0000000..9368429 --- /dev/null +++ b/doc/zmq_proxy.txt @@ -0,0 +1,97 @@ +zmq_proxy(3) +============ + +NAME +---- +zmq_proxy - start built-in 0MQ proxy + + +SYNOPSIS +-------- +*int zmq_proxy (const void '*frontend', const void '*backend', const void '*capture');* + + +DESCRIPTION +----------- +The _zmq_proxy()_ function starts the built-in 0MQ proxy in the current +application thread. + +The proxy connects a frontend socket to a backend socket. Conceptually, data +flows from frontend to backend. Depending on the socket types, replies may flow +in the opposite direction. The direction is conceptual only; the proxy is fully +symmetric and there is no technical difference between frontend and backend. + +Before calling _zmq_proxy()_ you must set any socket options, and connect or +bind both frontend and backend sockets. The two conventional proxy models are: + +_zmq_proxy()_ runs in the current thread and returns only if/when the current +context is closed. + +If the capture socket is not NULL, the proxy shall send all messages, received +on both frontend and backend, to the capture socket. The capture socket should +be a 'ZMQ_PUB', 'ZMQ_DEALER', 'ZMQ_PUSH', or 'ZMQ_PAIR' socket. + +Refer to linkzmq:zmq_socket[3] for a description of the available socket types. + +EXAMPLE USAGE +------------- + +Shared Queue +~~~~~~~~~~~~ + +When the frontend is a ZMQ_ROUTER socket, and the backend is a ZMQ_DEALER +socket, the proxy shall act as a shared queue that collects requests from a +set of clients, and distributes these fairly among a set of services. +Requests shall be fair-queued from frontend connections and distributed evenly +across backend connections. Replies shall automatically return to the client +that made the original request. + +Forwarder +~~~~~~~~~ + +When the frontend is a ZMQ_XSUB socket, and the backend is a ZMQ_XPUB socket, +the proxy shall act as a message forwarder that collects messages from a set +of publishers and forwards these to a set of subscribers. This may be used to +bridge networks transports, e.g. read on tcp:// and forward on pgm://. + +Streamer +~~~~~~~~ + +When the frontend is a ZMQ_PULL socket, and the backend is a ZMQ_PUSH socket, +the proxy shall collect tasks from a set of clients and forwards these to a set +of workers using the pipeline pattern. + +RETURN VALUE +------------ +The _zmq_proxy()_ function always returns `-1` and 'errno' set to *ETERM* (the +0MQ 'context' associated with either of the specified sockets was terminated). + + +EXAMPLE +------- +.Creating a shared queue proxy +---- +// Create frontend and backend sockets +void *frontend = zmq_socket (context, ZMQ_ROUTER); +assert (backend); +void *backend = zmq_socket (context, ZMQ_DEALER); +assert (frontend); +// Bind both sockets to TCP ports +assert (zmq_bind (frontend, "tcp://*:5555") == 0); +assert (zmq_bind (backend, "tcp://*:5556") == 0); +// Start the queue proxy, which runs until ETERM +zmq_proxy (frontend, backend, NULL); +---- + + +SEE ALSO +-------- +linkzmq:zmq_bind[3] +linkzmq:zmq_connect[3] +linkzmq:zmq_socket[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com> diff --git a/doc/zmq_recv.3 b/doc/zmq_recv.3 new file mode 100644 index 0000000..d6bf316 --- /dev/null +++ b/doc/zmq_recv.3 @@ -0,0 +1,138 @@ +'\" t +.\" Title: zmq_recv +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_RECV" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_recv \- receive a message part from a socket +.SH "SYNOPSIS" +.sp +\fBint zmq_recv (void \fR\fB\fI*socket\fR\fR\fB, void \fR\fB\fI*buf\fR\fR\fB, size_t \fR\fB\fIlen\fR\fR\fB, int \fR\fB\fIflags\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_recv()\fR function shall receive a message from the socket referenced by the \fIsocket\fR argument and store it in the buffer referenced by the \fIbuf\fR argument\&. Any bytes exceeding the length specified by the \fIlen\fR argument shall be truncated\&. If there are no messages available on the specified \fIsocket\fR the \fIzmq_recv()\fR function shall block until the request can be satisfied\&. The \fIflags\fR argument is a combination of the flags defined below: +.PP +\fBZMQ_DONTWAIT\fR +.RS 4 +Specifies that the operation should be performed in non\-blocking mode\&. If there are no messages available on the specified +\fIsocket\fR, the +\fIzmq_recv()\fR +function shall fail with +\fIerrno\fR +set to EAGAIN\&. +.RE +.SS "Multi\-part messages" +.sp +A 0MQ message is composed of 1 or more message parts\&. 0MQ ensures atomic delivery of messages: peers shall receive either all \fImessage parts\fR of a message or none at all\&. The total number of message parts is unlimited except by available memory\&. +.sp +An application that processes multi\-part messages must use the \fIZMQ_RCVMORE\fR \fBzmq_getsockopt\fR(3) option after calling \fIzmq_recv()\fR to determine if there are further parts to receive\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_recv()\fR function shall return number of bytes in the message if successful\&. Note that the value can exceed the value of the \fIlen\fR parameter in case the message was truncated\&. If not successful the function shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEAGAIN\fR +.RS 4 +Non\-blocking mode was requested and no messages are available at the moment\&. +.RE +.PP +\fBENOTSUP\fR +.RS 4 +The +\fIzmq_recv()\fR +operation is not supported by this socket type\&. +.RE +.PP +\fBEFSM\fR +.RS 4 +The +\fIzmq_recv()\fR +operation cannot be performed on this socket at the moment due to the socket not being in the appropriate state\&. This error may occur with socket types that switch between several states, such as ZMQ_REP\&. See the +\fImessaging patterns\fR +section of +\fBzmq_socket\fR(3) +for more information\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.PP +\fBEINTR\fR +.RS 4 +The operation was interrupted by delivery of a signal before a message was available\&. +.RE +.SH "EXAMPLE" +.PP +\fBReceiving a message from a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +char buf [256]; +nbytes = zmq_recv (socket, buf, 256, 0); +assert (nbytes != \-1); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_recvmsg\fR(3) \fBzmq_send\fR(3) \fBzmq_sendmsg\fR(3) \fBzmq_getsockopt\fR(3) \fBzmq_socket\fR(7) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>, and Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE +.IP " 3." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_recv.html b/doc/zmq_recv.html new file mode 100644 index 0000000..2981e58 --- /dev/null +++ b/doc/zmq_recv.html @@ -0,0 +1,895 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_recv(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_recv -
+ receive a message part from a socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_recv (void <em>*socket</em>, void <em>*buf</em>, size_t <em>len</em>, int <em>flags</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_recv()</em> function shall receive a message from the socket referenced
+by the <em>socket</em> argument and store it in the buffer referenced by the <em>buf</em>
+argument. Any bytes exceeding the length specified by the <em>len</em> argument shall
+be truncated. If there are no messages available on the specified <em>socket</em>
+the <em>zmq_recv()</em> function shall block until the request can be satisfied.
+The <em>flags</em> argument is a combination of the flags defined below:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ZMQ_DONTWAIT</strong>
+</dt>
+<dd>
+<p>
+Specifies that the operation should be performed in non-blocking mode. If there
+are no messages available on the specified <em>socket</em>, the <em>zmq_recv()</em>
+function shall fail with <em>errno</em> set to EAGAIN.
+</p>
+</dd>
+</dl></div>
+<div class="sect2">
+<h3 id="_multi_part_messages">Multi-part messages</h3>
+<div class="paragraph"><p>A ØMQ message is composed of 1 or more message parts. ØMQ ensures atomic
+delivery of messages: peers shall receive either all <em>message parts</em> of a
+message or none at all. The total number of message parts is unlimited except
+by available memory.</p></div>
+<div class="paragraph"><p>An application that processes multi-part messages must use the <em>ZMQ_RCVMORE</em>
+<a href="zmq_getsockopt.html">zmq_getsockopt(3)</a> option after calling <em>zmq_recv()</em> to determine if
+there are further parts to receive.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_recv()</em> function shall return number of bytes in the message
+if successful. Note that the value can exceed the value of the <em>len</em> parameter
+in case the message was truncated. If not successful the function shall return
+<tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EAGAIN</strong>
+</dt>
+<dd>
+<p>
+Non-blocking mode was requested and no messages are available at the moment.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSUP</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_recv()</em> operation is not supported by this socket type.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFSM</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_recv()</em> operation cannot be performed on this socket at the moment
+due to the socket not being in the appropriate state. This error may occur with
+socket types that switch between several states, such as ZMQ_REP. See the
+<em>messaging patterns</em> section of <a href="zmq_socket.html">zmq_socket(3)</a> for more information.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINTR</strong>
+</dt>
+<dd>
+<p>
+The operation was interrupted by delivery of a signal before a message was
+available.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Receiving a message from a socket</div>
+<div class="content">
+<pre><tt>char buf [256];
+nbytes = zmq_recv (socket, buf, 256, 0);
+assert (nbytes != -1);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_recvmsg.html">zmq_recvmsg(3)</a>
+<a href="zmq_send.html">zmq_send(3)</a>
+<a href="zmq_sendmsg.html">zmq_sendmsg(3)</a>
+<a href="zmq_getsockopt.html">zmq_getsockopt(3)</a>
+<a href="zmq_socket.html">zmq_socket(7)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>, and Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_recv.txt b/doc/zmq_recv.txt new file mode 100644 index 0000000..923badd --- /dev/null +++ b/doc/zmq_recv.txt @@ -0,0 +1,93 @@ +zmq_recv(3) +=========== + + +NAME +---- +zmq_recv - receive a message part from a socket + + +SYNOPSIS +-------- +*int zmq_recv (void '*socket', void '*buf', size_t 'len', int 'flags');* + + +DESCRIPTION +----------- +The _zmq_recv()_ function shall receive a message from the socket referenced +by the 'socket' argument and store it in the buffer referenced by the 'buf' +argument. Any bytes exceeding the length specified by the 'len' argument shall +be truncated. If there are no messages available on the specified 'socket' +the _zmq_recv()_ function shall block until the request can be satisfied. +The 'flags' argument is a combination of the flags defined below: + +*ZMQ_DONTWAIT*:: +Specifies that the operation should be performed in non-blocking mode. If there +are no messages available on the specified 'socket', the _zmq_recv()_ +function shall fail with 'errno' set to EAGAIN. + + +Multi-part messages +~~~~~~~~~~~~~~~~~~~ +A 0MQ message is composed of 1 or more message parts. 0MQ ensures atomic +delivery of messages: peers shall receive either all _message parts_ of a +message or none at all. The total number of message parts is unlimited except +by available memory. + +An application that processes multi-part messages must use the _ZMQ_RCVMORE_ +linkzmq:zmq_getsockopt[3] option after calling _zmq_recv()_ to determine if +there are further parts to receive. + +RETURN VALUE +------------ +The _zmq_recv()_ function shall return number of bytes in the message +if successful. Note that the value can exceed the value of the 'len' parameter +in case the message was truncated. If not successful the function shall return +`-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +*EAGAIN*:: +Non-blocking mode was requested and no messages are available at the moment. +*ENOTSUP*:: +The _zmq_recv()_ operation is not supported by this socket type. +*EFSM*:: +The _zmq_recv()_ operation cannot be performed on this socket at the moment +due to the socket not being in the appropriate state. This error may occur with +socket types that switch between several states, such as ZMQ_REP. See the +_messaging patterns_ section of linkzmq:zmq_socket[3] for more information. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. +*EINTR*:: +The operation was interrupted by delivery of a signal before a message was +available. + + +EXAMPLE +------- +.Receiving a message from a socket +---- +char buf [256]; +nbytes = zmq_recv (socket, buf, 256, 0); +assert (nbytes != -1); +---- + + +SEE ALSO +-------- +linkzmq:zmq_recvmsg[3] +linkzmq:zmq_send[3] +linkzmq:zmq_sendmsg[3] +linkzmq:zmq_getsockopt[3] +linkzmq:zmq_socket[7] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>, and Pieter Hintjens <ph@imatix.com>. + diff --git a/doc/zmq_recvmsg.3 b/doc/zmq_recvmsg.3 new file mode 100644 index 0000000..8b33876 --- /dev/null +++ b/doc/zmq_recvmsg.3 @@ -0,0 +1,191 @@ +'\" t +.\" Title: zmq_recvmsg +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_RECVMSG" "3" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_recvmsg \- receive a message part from a socket +.SH "SYNOPSIS" +.sp +\fBint zmq_recvmsg (void \fR\fB\fI*socket\fR\fR\fB, zmq_msg_t \fR\fB\fI*msg\fR\fR\fB, int \fR\fB\fIflags\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_recvmsg()\fR function shall receive a message part from the socket referenced by the \fIsocket\fR argument and store it in the message referenced by the \fImsg\fR argument\&. Any content previously stored in \fImsg\fR shall be properly deallocated\&. If there are no message parts available on the specified \fIsocket\fR the \fIzmq_recvmsg()\fR function shall block until the request can be satisfied\&. The \fIflags\fR argument is a combination of the flags defined below: +.PP +\fBZMQ_DONTWAIT\fR +.RS 4 +Specifies that the operation should be performed in non\-blocking mode\&. If there are no messages available on the specified +\fIsocket\fR, the +\fIzmq_recvmsg()\fR +function shall fail with +\fIerrno\fR +set to EAGAIN\&. +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +this API method is deprecated in favor of zmq_msg_recv(3)\&. +.sp .5v +.RE +.SS "Multi\-part messages" +.sp +A 0MQ message is composed of 1 or more message parts\&. Each message part is an independent \fIzmq_msg_t\fR in its own right\&. 0MQ ensures atomic delivery of messages: peers shall receive either all \fImessage parts\fR of a message or none at all\&. The total number of message parts is unlimited except by available memory\&. +.sp +An application that processes multi\-part messages must use the \fIZMQ_RCVMORE\fR \fBzmq_getsockopt\fR(3) option after calling \fIzmq_recvmsg()\fR to determine if there are further parts to receive\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_recvmsg()\fR function shall return number of bytes in the message if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEAGAIN\fR +.RS 4 +Non\-blocking mode was requested and no messages are available at the moment\&. +.RE +.PP +\fBENOTSUP\fR +.RS 4 +The +\fIzmq_recvmsg()\fR +operation is not supported by this socket type\&. +.RE +.PP +\fBEFSM\fR +.RS 4 +The +\fIzmq_recvmsg()\fR +operation cannot be performed on this socket at the moment due to the socket not being in the appropriate state\&. This error may occur with socket types that switch between several states, such as ZMQ_REP\&. See the +\fImessaging patterns\fR +section of +\fBzmq_socket\fR(3) +for more information\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.PP +\fBEINTR\fR +.RS 4 +The operation was interrupted by delivery of a signal before a message was available\&. +.RE +.PP +\fBEFAULT\fR +.RS 4 +The message passed to the function was invalid\&. +.RE +.SH "EXAMPLE" +.PP +\fBReceiving a message from a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Create an empty 0MQ message */ +zmq_msg_t msg; +int rc = zmq_msg_init (&msg); +assert (rc == 0); +/* Block until a message is available to be received from socket */ +rc = zmq_recvmsg (socket, &msg, 0); +assert (rc != \-1); +/* Release message */ +zmq_msg_close (&msg); +.fi +.if n \{\ +.RE +.\} +.PP +\fBReceiving a multi-part message\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +int64_t more; +size_t more_size = sizeof more; +do { + /* Create an empty 0MQ message to hold the message part */ + zmq_msg_t part; + int rc = zmq_msg_init (&part); + assert (rc == 0); + /* Block until a message is available to be received from socket */ + rc = zmq_recvmsg (socket, &part, 0); + assert (rc != \-1); + /* Determine if more message parts are to follow */ + rc = zmq_getsockopt (socket, ZMQ_RCVMORE, &more, &more_size); + assert (rc == 0); + zmq_msg_close (&part); +} while (more); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_recv\fR(3) \fBzmq_send\fR(3) \fBzmq_sendmsg\fR(3) \fBzmq_getsockopt\fR(3) \fBzmq_socket\fR(7) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This man page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Lucina <\m[blue]\fBmartin@lucina\&.net\fR\m[]\&\s-2\u[2]\d\s+2> and Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +martin@lucina.net +.RS 4 +\%mailto:martin@lucina.net +.RE +.IP " 3." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_recvmsg.html b/doc/zmq_recvmsg.html new file mode 100644 index 0000000..f3203a3 --- /dev/null +++ b/doc/zmq_recvmsg.html @@ -0,0 +1,936 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<h1>
+zmq_recvmsg(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_recvmsg -
+ receive a message part from a socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_recvmsg (void <em>*socket</em>, zmq_msg_t <em>*msg</em>, int <em>flags</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_recvmsg()</em> function shall receive a message part from the socket
+referenced by the <em>socket</em> argument and store it in the message referenced by
+the <em>msg</em> argument. Any content previously stored in <em>msg</em> shall be properly
+deallocated. If there are no message parts available on the specified <em>socket</em>
+the <em>zmq_recvmsg()</em> function shall block until the request can be satisfied.
+The <em>flags</em> argument is a combination of the flags defined below:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ZMQ_DONTWAIT</strong>
+</dt>
+<dd>
+<p>
+Specifies that the operation should be performed in non-blocking mode. If there
+are no messages available on the specified <em>socket</em>, the <em>zmq_recvmsg()</em>
+function shall fail with <em>errno</em> set to EAGAIN.
+</p>
+</dd>
+</dl></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">this API method is deprecated in favor of zmq_msg_recv(3).</td>
+</tr></table>
+</div>
+<div class="sect2">
+<h3 id="_multi_part_messages">Multi-part messages</h3>
+<div class="paragraph"><p>A ØMQ message is composed of 1 or more message parts. Each message
+part is an independent <em>zmq_msg_t</em> in its own right. ØMQ ensures atomic
+delivery of messages: peers shall receive either all <em>message parts</em> of a
+message or none at all. The total number of message parts is unlimited except
+by available memory.</p></div>
+<div class="paragraph"><p>An application that processes multi-part messages must use the <em>ZMQ_RCVMORE</em>
+<a href="zmq_getsockopt.html">zmq_getsockopt(3)</a> option after calling <em>zmq_recvmsg()</em> to determine if
+there are further parts to receive.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_recvmsg()</em> function shall return number of bytes in the message
+if successful. Otherwise it shall return <tt>-1</tt> and set <em>errno</em> to one of the
+values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EAGAIN</strong>
+</dt>
+<dd>
+<p>
+Non-blocking mode was requested and no messages are available at the moment.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSUP</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_recvmsg()</em> operation is not supported by this socket type.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFSM</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_recvmsg()</em> operation cannot be performed on this socket at the moment
+due to the socket not being in the appropriate state. This error may occur with
+socket types that switch between several states, such as ZMQ_REP. See the
+<em>messaging patterns</em> section of <a href="zmq_socket.html">zmq_socket(3)</a> for more information.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINTR</strong>
+</dt>
+<dd>
+<p>
+The operation was interrupted by delivery of a signal before a message was
+available.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFAULT</strong>
+</dt>
+<dd>
+<p>
+The message passed to the function was invalid.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Receiving a message from a socket</div>
+<div class="content">
+<pre><tt>/* Create an empty 0MQ message */
+zmq_msg_t msg;
+int rc = zmq_msg_init (&msg);
+assert (rc == 0);
+/* Block until a message is available to be received from socket */
+rc = zmq_recvmsg (socket, &msg, 0);
+assert (rc != -1);
+/* Release message */
+zmq_msg_close (&msg);</tt></pre>
+</div></div>
+<div class="listingblock">
+<div class="title">Receiving a multi-part message</div>
+<div class="content">
+<pre><tt>int64_t more;
+size_t more_size = sizeof more;
+do {
+ /* Create an empty 0MQ message to hold the message part */
+ zmq_msg_t part;
+ int rc = zmq_msg_init (&part);
+ assert (rc == 0);
+ /* Block until a message is available to be received from socket */
+ rc = zmq_recvmsg (socket, &part, 0);
+ assert (rc != -1);
+ /* Determine if more message parts are to follow */
+ rc = zmq_getsockopt (socket, ZMQ_RCVMORE, &more, &more_size);
+ assert (rc == 0);
+ zmq_msg_close (&part);
+} while (more);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_recv.html">zmq_recv(3)</a>
+<a href="zmq_send.html">zmq_send(3)</a>
+<a href="zmq_sendmsg.html">zmq_sendmsg(3)</a>
+<a href="zmq_getsockopt.html">zmq_getsockopt(3)</a>
+<a href="zmq_socket.html">zmq_socket(7)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This man page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>>, Martin
+Lucina <<a href="mailto:martin@lucina.net">martin@lucina.net</a>> and Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-11-14 10:09:14 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_recvmsg.txt b/doc/zmq_recvmsg.txt new file mode 100644 index 0000000..9aededd --- /dev/null +++ b/doc/zmq_recvmsg.txt @@ -0,0 +1,123 @@ +zmq_recvmsg(3) +============== + + +NAME +---- +zmq_recvmsg - receive a message part from a socket + + +SYNOPSIS +-------- +*int zmq_recvmsg (void '*socket', zmq_msg_t '*msg', int 'flags');* + + +DESCRIPTION +----------- +The _zmq_recvmsg()_ function shall receive a message part from the socket +referenced by the 'socket' argument and store it in the message referenced by +the 'msg' argument. Any content previously stored in 'msg' shall be properly +deallocated. If there are no message parts available on the specified 'socket' +the _zmq_recvmsg()_ function shall block until the request can be satisfied. +The 'flags' argument is a combination of the flags defined below: + +*ZMQ_DONTWAIT*:: +Specifies that the operation should be performed in non-blocking mode. If there +are no messages available on the specified 'socket', the _zmq_recvmsg()_ +function shall fail with 'errno' set to EAGAIN. + +NOTE: this API method is deprecated in favor of zmq_msg_recv(3). + + +Multi-part messages +~~~~~~~~~~~~~~~~~~~ +A 0MQ message is composed of 1 or more message parts. Each message +part is an independent 'zmq_msg_t' in its own right. 0MQ ensures atomic +delivery of messages: peers shall receive either all _message parts_ of a +message or none at all. The total number of message parts is unlimited except +by available memory. + +An application that processes multi-part messages must use the _ZMQ_RCVMORE_ +linkzmq:zmq_getsockopt[3] option after calling _zmq_recvmsg()_ to determine if +there are further parts to receive. + + +RETURN VALUE +------------ +The _zmq_recvmsg()_ function shall return number of bytes in the message +if successful. Otherwise it shall return `-1` and set 'errno' to one of the +values defined below. + + +ERRORS +------ +*EAGAIN*:: +Non-blocking mode was requested and no messages are available at the moment. +*ENOTSUP*:: +The _zmq_recvmsg()_ operation is not supported by this socket type. +*EFSM*:: +The _zmq_recvmsg()_ operation cannot be performed on this socket at the moment +due to the socket not being in the appropriate state. This error may occur with +socket types that switch between several states, such as ZMQ_REP. See the +_messaging patterns_ section of linkzmq:zmq_socket[3] for more information. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. +*EINTR*:: +The operation was interrupted by delivery of a signal before a message was +available. +*EFAULT*:: +The message passed to the function was invalid. + + +EXAMPLE +------- +.Receiving a message from a socket +---- +/* Create an empty 0MQ message */ +zmq_msg_t msg; +int rc = zmq_msg_init (&msg); +assert (rc == 0); +/* Block until a message is available to be received from socket */ +rc = zmq_recvmsg (socket, &msg, 0); +assert (rc != -1); +/* Release message */ +zmq_msg_close (&msg); +---- + +.Receiving a multi-part message +---- +int64_t more; +size_t more_size = sizeof more; +do { + /* Create an empty 0MQ message to hold the message part */ + zmq_msg_t part; + int rc = zmq_msg_init (&part); + assert (rc == 0); + /* Block until a message is available to be received from socket */ + rc = zmq_recvmsg (socket, &part, 0); + assert (rc != -1); + /* Determine if more message parts are to follow */ + rc = zmq_getsockopt (socket, ZMQ_RCVMORE, &more, &more_size); + assert (rc == 0); + zmq_msg_close (&part); +} while (more); +---- + + +SEE ALSO +-------- +linkzmq:zmq_recv[3] +linkzmq:zmq_send[3] +linkzmq:zmq_sendmsg[3] +linkzmq:zmq_getsockopt[3] +linkzmq:zmq_socket[7] +linkzmq:zmq[7] + + +AUTHORS +------- +This man page was written by Martin Sustrik <sustrik@250bpm.com>, Martin +Lucina <martin@lucina.net> and Pieter Hintjens <ph@imatix.com>. + diff --git a/doc/zmq_send.3 b/doc/zmq_send.3 new file mode 100644 index 0000000..3de1f0b --- /dev/null +++ b/doc/zmq_send.3 @@ -0,0 +1,164 @@ +'\" t +.\" Title: zmq_send +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_SEND" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_send \- send a message part on a socket +.SH "SYNOPSIS" +.sp +\fBint zmq_send (void \fR\fB\fI*socket\fR\fR\fB, void \fR\fB\fI*buf\fR\fR\fB, size_t \fR\fB\fIlen\fR\fR\fB, int \fR\fB\fIflags\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_send()\fR function shall queue a message created from the buffer referenced by the \fIbuf\fR and \fIlen\fR arguments\&. The \fIflags\fR argument is a combination of the flags defined below: +.PP +\fBZMQ_DONTWAIT\fR +.RS 4 +Specifies that the operation should be performed in non\-blocking mode\&. If the message cannot be queued on the +\fIsocket\fR, the +\fIzmq_send()\fR +function shall fail with +\fIerrno\fR +set to EAGAIN\&. +.RE +.PP +\fBZMQ_SNDMORE\fR +.RS 4 +Specifies that the message being sent is a multi\-part message, and that further message parts are to follow\&. Refer to the section regarding multi\-part messages below for a detailed description\&. +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +A successful invocation of \fIzmq_send()\fR does not indicate that the message has been transmitted to the network, only that it has been queued on the \fIsocket\fR and 0MQ has assumed responsibility for the message\&. +.sp .5v +.RE +.SS "Multi\-part messages" +.sp +A 0MQ message is composed of 1 or more message parts\&. 0MQ ensures atomic delivery of messages: peers shall receive either all \fImessage parts\fR of a message or none at all\&. The total number of message parts is unlimited except by available memory\&. +.sp +An application that sends multi\-part messages must use the \fIZMQ_SNDMORE\fR flag when sending each message part except the final one\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_send()\fR function shall return number of bytes in the message if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEAGAIN\fR +.RS 4 +Non\-blocking mode was requested and the message cannot be sent at the moment\&. +.RE +.PP +\fBENOTSUP\fR +.RS 4 +The +\fIzmq_send()\fR +operation is not supported by this socket type\&. +.RE +.PP +\fBEFSM\fR +.RS 4 +The +\fIzmq_send()\fR +operation cannot be performed on this socket at the moment due to the socket not being in the appropriate state\&. This error may occur with socket types that switch between several states, such as ZMQ_REP\&. See the +\fImessaging patterns\fR +section of +\fBzmq_socket\fR(3) +for more information\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.PP +\fBEINTR\fR +.RS 4 +The operation was interrupted by delivery of a signal before the message was sent\&. +.RE +.SH "EXAMPLE" +.PP +\fBSending a multi-part message\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Send a multi\-part message consisting of three parts to socket */ +rc = zmq_send (socket, "ABC", 3, ZMQ_SNDMORE); +assert (rc == 3); +rc = zmq_send (socket, "DEFGH", 5, ZMQ_SNDMORE); +assert (rc == 5); +/* Final part; no more parts to follow */ +rc = zmq_send (socket, "JK", 2, 0); +assert (rc == 2); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_sendmsg\fR(3) \fBzmq_recv\fR(3) \fBzmq_recvmsg\fR(3) \fBzmq_socket\fR(7) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>, and Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE +.IP " 3." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_send.html b/doc/zmq_send.html new file mode 100644 index 0000000..86b590c --- /dev/null +++ b/doc/zmq_send.html @@ -0,0 +1,914 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_send(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_send -
+ send a message part on a socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_send (void <em>*socket</em>, void <em>*buf</em>, size_t <em>len</em>, int <em>flags</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_send()</em> function shall queue a message created from the buffer
+referenced by the <em>buf</em> and <em>len</em> arguments. The <em>flags</em> argument is
+a combination of the flags defined below:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ZMQ_DONTWAIT</strong>
+</dt>
+<dd>
+<p>
+Specifies that the operation should be performed in non-blocking mode. If the
+message cannot be queued on the <em>socket</em>, the <em>zmq_send()</em> function shall
+fail with <em>errno</em> set to EAGAIN.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ZMQ_SNDMORE</strong>
+</dt>
+<dd>
+<p>
+Specifies that the message being sent is a multi-part message, and that further
+message parts are to follow. Refer to the section regarding multi-part messages
+below for a detailed description.
+</p>
+</dd>
+</dl></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">A successful invocation of <em>zmq_send()</em> does not indicate that the
+message has been transmitted to the network, only that it has been queued on
+the <em>socket</em> and ØMQ has assumed responsibility for the message.</td>
+</tr></table>
+</div>
+<div class="sect2">
+<h3 id="_multi_part_messages">Multi-part messages</h3>
+<div class="paragraph"><p>A ØMQ message is composed of 1 or more message parts. ØMQ ensures atomic
+delivery of messages: peers shall receive either all <em>message parts</em> of a
+message or none at all. The total number of message parts is unlimited except
+by available memory.</p></div>
+<div class="paragraph"><p>An application that sends multi-part messages must use the <em>ZMQ_SNDMORE</em> flag
+when sending each message part except the final one.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_send()</em> function shall return number of bytes in the message
+if successful. Otherwise it shall return <tt>-1</tt> and set <em>errno</em> to one of the
+values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EAGAIN</strong>
+</dt>
+<dd>
+<p>
+Non-blocking mode was requested and the message cannot be sent at the moment.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSUP</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_send()</em> operation is not supported by this socket type.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFSM</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_send()</em> operation cannot be performed on this socket at the moment
+due to the socket not being in the appropriate state. This error may occur with
+socket types that switch between several states, such as ZMQ_REP. See the
+<em>messaging patterns</em> section of <a href="zmq_socket.html">zmq_socket(3)</a> for more information.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINTR</strong>
+</dt>
+<dd>
+<p>
+The operation was interrupted by delivery of a signal before the message was
+sent.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Sending a multi-part message</div>
+<div class="content">
+<pre><tt>/* Send a multi-part message consisting of three parts to socket */
+rc = zmq_send (socket, "ABC", 3, ZMQ_SNDMORE);
+assert (rc == 3);
+rc = zmq_send (socket, "DEFGH", 5, ZMQ_SNDMORE);
+assert (rc == 5);
+/* Final part; no more parts to follow */
+rc = zmq_send (socket, "JK", 2, 0);
+assert (rc == 2);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_sendmsg.html">zmq_sendmsg(3)</a>
+<a href="zmq_recv.html">zmq_recv(3)</a>
+<a href="zmq_recvmsg.html">zmq_recvmsg(3)</a>
+<a href="zmq_socket.html">zmq_socket(7)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>, and Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_send.txt b/doc/zmq_send.txt new file mode 100644 index 0000000..9409f1f --- /dev/null +++ b/doc/zmq_send.txt @@ -0,0 +1,100 @@ +zmq_send(3) +=========== + + +NAME +---- +zmq_send - send a message part on a socket + + +SYNOPSIS +-------- +*int zmq_send (void '*socket', void '*buf', size_t 'len', int 'flags');* + + +DESCRIPTION +----------- +The _zmq_send()_ function shall queue a message created from the buffer +referenced by the 'buf' and 'len' arguments. The 'flags' argument is +a combination of the flags defined below: + +*ZMQ_DONTWAIT*:: +Specifies that the operation should be performed in non-blocking mode. If the +message cannot be queued on the 'socket', the _zmq_send()_ function shall +fail with 'errno' set to EAGAIN. + +*ZMQ_SNDMORE*:: +Specifies that the message being sent is a multi-part message, and that further +message parts are to follow. Refer to the section regarding multi-part messages +below for a detailed description. + +NOTE: A successful invocation of _zmq_send()_ does not indicate that the +message has been transmitted to the network, only that it has been queued on +the 'socket' and 0MQ has assumed responsibility for the message. + + +Multi-part messages +~~~~~~~~~~~~~~~~~~~ +A 0MQ message is composed of 1 or more message parts. 0MQ ensures atomic +delivery of messages: peers shall receive either all _message parts_ of a +message or none at all. The total number of message parts is unlimited except +by available memory. + +An application that sends multi-part messages must use the _ZMQ_SNDMORE_ flag +when sending each message part except the final one. + + +RETURN VALUE +------------ +The _zmq_send()_ function shall return number of bytes in the message +if successful. Otherwise it shall return `-1` and set 'errno' to one of the +values defined below. + + +ERRORS +------ +*EAGAIN*:: +Non-blocking mode was requested and the message cannot be sent at the moment. +*ENOTSUP*:: +The _zmq_send()_ operation is not supported by this socket type. +*EFSM*:: +The _zmq_send()_ operation cannot be performed on this socket at the moment +due to the socket not being in the appropriate state. This error may occur with +socket types that switch between several states, such as ZMQ_REP. See the +_messaging patterns_ section of linkzmq:zmq_socket[3] for more information. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. +*EINTR*:: +The operation was interrupted by delivery of a signal before the message was +sent. + + +EXAMPLE +------- +.Sending a multi-part message +---- +/* Send a multi-part message consisting of three parts to socket */ +rc = zmq_send (socket, "ABC", 3, ZMQ_SNDMORE); +assert (rc == 3); +rc = zmq_send (socket, "DEFGH", 5, ZMQ_SNDMORE); +assert (rc == 5); +/* Final part; no more parts to follow */ +rc = zmq_send (socket, "JK", 2, 0); +assert (rc == 2); +---- + +SEE ALSO +-------- +linkzmq:zmq_sendmsg[3] +linkzmq:zmq_recv[3] +linkzmq:zmq_recvmsg[3] +linkzmq:zmq_socket[7] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>, and Pieter Hintjens <ph@imatix.com>. diff --git a/doc/zmq_sendmsg.3 b/doc/zmq_sendmsg.3 new file mode 100644 index 0000000..f8e2e0d --- /dev/null +++ b/doc/zmq_sendmsg.3 @@ -0,0 +1,204 @@ +'\" t +.\" Title: zmq_sendmsg +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_SENDMSG" "3" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_sendmsg \- send a message part on a socket +.SH "SYNOPSIS" +.sp +\fBint zmq_sendmsg (void \fR\fB\fI*socket\fR\fR\fB, zmq_msg_t \fR\fB\fI*msg\fR\fR\fB, int \fR\fB\fIflags\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_sendmsg()\fR function shall queue the message referenced by the \fImsg\fR argument to be sent to the socket referenced by the \fIsocket\fR argument\&. The \fIflags\fR argument is a combination of the flags defined below: +.PP +\fBZMQ_DONTWAIT\fR +.RS 4 +Specifies that the operation should be performed in non\-blocking mode\&. If the message cannot be queued on the +\fIsocket\fR, the +\fIzmq_sendmsg()\fR +function shall fail with +\fIerrno\fR +set to EAGAIN\&. +.RE +.PP +\fBZMQ_SNDMORE\fR +.RS 4 +Specifies that the message being sent is a multi\-part message, and that further message parts are to follow\&. Refer to the section regarding multi\-part messages below for a detailed description\&. +.RE +.sp +The \fIzmq_msg_t\fR structure passed to \fIzmq_sendmsg()\fR is nullified during the call\&. If you want to send the same message to multiple sockets you have to copy it using (e\&.g\&. using \fIzmq_msg_copy()\fR)\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +A successful invocation of \fIzmq_sendmsg()\fR does not indicate that the message has been transmitted to the network, only that it has been queued on the \fIsocket\fR and 0MQ has assumed responsibility for the message\&. +.sp .5v +.RE +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +this API method is deprecated in favor of zmq_msg_send(3)\&. +.sp .5v +.RE +.SS "Multi\-part messages" +.sp +A 0MQ message is composed of 1 or more message parts\&. Each message part is an independent \fIzmq_msg_t\fR in its own right\&. 0MQ ensures atomic delivery of messages: peers shall receive either all \fImessage parts\fR of a message or none at all\&. The total number of message parts is unlimited except by available memory\&. +.sp +An application that sends multi\-part messages must use the \fIZMQ_SNDMORE\fR flag when sending each message part except the final one\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_sendmsg()\fR function shall return number of bytes in the message if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEAGAIN\fR +.RS 4 +Non\-blocking mode was requested and the message cannot be sent at the moment\&. +.RE +.PP +\fBENOTSUP\fR +.RS 4 +The +\fIzmq_sendmsg()\fR +operation is not supported by this socket type\&. +.RE +.PP +\fBEFSM\fR +.RS 4 +The +\fIzmq_sendmsg()\fR +operation cannot be performed on this socket at the moment due to the socket not being in the appropriate state\&. This error may occur with socket types that switch between several states, such as ZMQ_REP\&. See the +\fImessaging patterns\fR +section of +\fBzmq_socket\fR(3) +for more information\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.PP +\fBEINTR\fR +.RS 4 +The operation was interrupted by delivery of a signal before the message was sent\&. +.RE +.PP +\fBEFAULT\fR +.RS 4 +Invalid message\&. +.RE +.SH "EXAMPLE" +.PP +\fBFilling in a message and sending it to a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Create a new message, allocating 6 bytes for message content */ +zmq_msg_t msg; +int rc = zmq_msg_init_size (&msg, 6); +assert (rc == 0); +/* Fill in message content with \*(AqAAAAAA\*(Aq */ +memset (zmq_msg_data (&msg), \*(AqA\*(Aq, 6); +/* Send the message to the socket */ +rc = zmq_sendmsg (socket, &msg, 0); +assert (rc == 6); +.fi +.if n \{\ +.RE +.\} +.PP +\fBSending a multi-part message\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Send a multi\-part message consisting of three parts to socket */ +rc = zmq_sendmsg (socket, &part1, ZMQ_SNDMORE); +rc = zmq_sendmsg (socket, &part2, ZMQ_SNDMORE); +/* Final part; no more parts to follow */ +rc = zmq_sendmsg (socket, &part3, 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_recv\fR(3) \fBzmq_recv\fR(3) \fBzmq_recvmsg\fR(3) \fBzmq_socket\fR(7) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>, and Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE +.IP " 3." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_sendmsg.html b/doc/zmq_sendmsg.html new file mode 100644 index 0000000..f5bebaf --- /dev/null +++ b/doc/zmq_sendmsg.html @@ -0,0 +1,944 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<div id="header">
+<h1>
+zmq_sendmsg(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_sendmsg -
+ send a message part on a socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_sendmsg (void <em>*socket</em>, zmq_msg_t <em>*msg</em>, int <em>flags</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_sendmsg()</em> function shall queue the message referenced by the <em>msg</em>
+argument to be sent to the socket referenced by the <em>socket</em> argument. The
+<em>flags</em> argument is a combination of the flags defined below:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ZMQ_DONTWAIT</strong>
+</dt>
+<dd>
+<p>
+Specifies that the operation should be performed in non-blocking mode. If the
+message cannot be queued on the <em>socket</em>, the <em>zmq_sendmsg()</em> function shall
+fail with <em>errno</em> set to EAGAIN.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ZMQ_SNDMORE</strong>
+</dt>
+<dd>
+<p>
+Specifies that the message being sent is a multi-part message, and that further
+message parts are to follow. Refer to the section regarding multi-part messages
+below for a detailed description.
+</p>
+</dd>
+</dl></div>
+<div class="paragraph"><p>The <em>zmq_msg_t</em> structure passed to <em>zmq_sendmsg()</em> is nullified during the
+call. If you want to send the same message to multiple sockets you have to copy
+it using (e.g. using <em>zmq_msg_copy()</em>).</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">A successful invocation of <em>zmq_sendmsg()</em> does not indicate that the
+message has been transmitted to the network, only that it has been queued on
+the <em>socket</em> and ØMQ has assumed responsibility for the message.</td>
+</tr></table>
+</div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">this API method is deprecated in favor of zmq_msg_send(3).</td>
+</tr></table>
+</div>
+<div class="sect2">
+<h3 id="_multi_part_messages">Multi-part messages</h3>
+<div class="paragraph"><p>A ØMQ message is composed of 1 or more message parts. Each message
+part is an independent <em>zmq_msg_t</em> in its own right. ØMQ ensures atomic
+delivery of messages: peers shall receive either all <em>message parts</em> of a
+message or none at all. The total number of message parts is unlimited except
+by available memory.</p></div>
+<div class="paragraph"><p>An application that sends multi-part messages must use the <em>ZMQ_SNDMORE</em> flag
+when sending each message part except the final one.</p></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_sendmsg()</em> function shall return number of bytes in the message
+if successful. Otherwise it shall return <tt>-1</tt> and set <em>errno</em> to one of the
+values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EAGAIN</strong>
+</dt>
+<dd>
+<p>
+Non-blocking mode was requested and the message cannot be sent at the moment.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSUP</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_sendmsg()</em> operation is not supported by this socket type.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFSM</strong>
+</dt>
+<dd>
+<p>
+The <em>zmq_sendmsg()</em> operation cannot be performed on this socket at the moment
+due to the socket not being in the appropriate state. This error may occur with
+socket types that switch between several states, such as ZMQ_REP. See the
+<em>messaging patterns</em> section of <a href="zmq_socket.html">zmq_socket(3)</a> for more information.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINTR</strong>
+</dt>
+<dd>
+<p>
+The operation was interrupted by delivery of a signal before the message was
+sent.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFAULT</strong>
+</dt>
+<dd>
+<p>
+Invalid message.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Filling in a message and sending it to a socket</div>
+<div class="content">
+<pre><tt>/* Create a new message, allocating 6 bytes for message content */
+zmq_msg_t msg;
+int rc = zmq_msg_init_size (&msg, 6);
+assert (rc == 0);
+/* Fill in message content with 'AAAAAA' */
+memset (zmq_msg_data (&msg), 'A', 6);
+/* Send the message to the socket */
+rc = zmq_sendmsg (socket, &msg, 0);
+assert (rc == 6);</tt></pre>
+</div></div>
+<div class="listingblock">
+<div class="title">Sending a multi-part message</div>
+<div class="content">
+<pre><tt>/* Send a multi-part message consisting of three parts to socket */
+rc = zmq_sendmsg (socket, &part1, ZMQ_SNDMORE);
+rc = zmq_sendmsg (socket, &part2, ZMQ_SNDMORE);
+/* Final part; no more parts to follow */
+rc = zmq_sendmsg (socket, &part3, 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_recv.html">zmq_recv(3)</a>
+<a href="zmq_recv.html">zmq_recv(3)</a>
+<a href="zmq_recvmsg.html">zmq_recvmsg(3)</a>
+<a href="zmq_socket.html">zmq_socket(7)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>, and Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-11-14 10:09:14 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_sendmsg.txt b/doc/zmq_sendmsg.txt new file mode 100644 index 0000000..aacd7ae --- /dev/null +++ b/doc/zmq_sendmsg.txt @@ -0,0 +1,119 @@ +zmq_sendmsg(3) +============== + + +NAME +---- +zmq_sendmsg - send a message part on a socket + + +SYNOPSIS +-------- +*int zmq_sendmsg (void '*socket', zmq_msg_t '*msg', int 'flags');* + + +DESCRIPTION +----------- +The _zmq_sendmsg()_ function shall queue the message referenced by the 'msg' +argument to be sent to the socket referenced by the 'socket' argument. The +'flags' argument is a combination of the flags defined below: + +*ZMQ_DONTWAIT*:: +Specifies that the operation should be performed in non-blocking mode. If the +message cannot be queued on the 'socket', the _zmq_sendmsg()_ function shall +fail with 'errno' set to EAGAIN. + +*ZMQ_SNDMORE*:: +Specifies that the message being sent is a multi-part message, and that further +message parts are to follow. Refer to the section regarding multi-part messages +below for a detailed description. + +The _zmq_msg_t_ structure passed to _zmq_sendmsg()_ is nullified during the +call. If you want to send the same message to multiple sockets you have to copy +it using (e.g. using _zmq_msg_copy()_). + +NOTE: A successful invocation of _zmq_sendmsg()_ does not indicate that the +message has been transmitted to the network, only that it has been queued on +the 'socket' and 0MQ has assumed responsibility for the message. + +NOTE: this API method is deprecated in favor of zmq_msg_send(3). + +Multi-part messages +~~~~~~~~~~~~~~~~~~~ +A 0MQ message is composed of 1 or more message parts. Each message +part is an independent 'zmq_msg_t' in its own right. 0MQ ensures atomic +delivery of messages: peers shall receive either all _message parts_ of a +message or none at all. The total number of message parts is unlimited except +by available memory. + +An application that sends multi-part messages must use the _ZMQ_SNDMORE_ flag +when sending each message part except the final one. + +RETURN VALUE +------------ +The _zmq_sendmsg()_ function shall return number of bytes in the message +if successful. Otherwise it shall return `-1` and set 'errno' to one of the +values defined below. + + +ERRORS +------ +*EAGAIN*:: +Non-blocking mode was requested and the message cannot be sent at the moment. +*ENOTSUP*:: +The _zmq_sendmsg()_ operation is not supported by this socket type. +*EFSM*:: +The _zmq_sendmsg()_ operation cannot be performed on this socket at the moment +due to the socket not being in the appropriate state. This error may occur with +socket types that switch between several states, such as ZMQ_REP. See the +_messaging patterns_ section of linkzmq:zmq_socket[3] for more information. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. +*EINTR*:: +The operation was interrupted by delivery of a signal before the message was +sent. +*EFAULT*:: +Invalid message. + + +EXAMPLE +------- +.Filling in a message and sending it to a socket +---- +/* Create a new message, allocating 6 bytes for message content */ +zmq_msg_t msg; +int rc = zmq_msg_init_size (&msg, 6); +assert (rc == 0); +/* Fill in message content with 'AAAAAA' */ +memset (zmq_msg_data (&msg), 'A', 6); +/* Send the message to the socket */ +rc = zmq_sendmsg (socket, &msg, 0); +assert (rc == 6); +---- + +.Sending a multi-part message +---- +/* Send a multi-part message consisting of three parts to socket */ +rc = zmq_sendmsg (socket, &part1, ZMQ_SNDMORE); +rc = zmq_sendmsg (socket, &part2, ZMQ_SNDMORE); +/* Final part; no more parts to follow */ +rc = zmq_sendmsg (socket, &part3, 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_recv[3] +linkzmq:zmq_recv[3] +linkzmq:zmq_recvmsg[3] +linkzmq:zmq_socket[7] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>, and Pieter Hintjens <ph@imatix.com>. + diff --git a/doc/zmq_setsockopt.3 b/doc/zmq_setsockopt.3 new file mode 100644 index 0000000..cabad12 --- /dev/null +++ b/doc/zmq_setsockopt.3 @@ -0,0 +1,1303 @@ +'\" t +.\" Title: zmq_setsockopt +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_SETSOCKOPT" "3" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_setsockopt \- set 0MQ socket options +.SH "SYNOPSIS" +.sp +\fBint zmq_setsockopt (void \fR\fB\fI*socket\fR\fR\fB, int \fR\fB\fIoption_name\fR\fR\fB, const void \fR\fB\fI*option_value\fR\fR\fB, size_t \fR\fB\fIoption_len\fR\fR\fB);\fR +.sp +Caution: All options, with the exception of ZMQ_SUBSCRIBE, ZMQ_UNSUBSCRIBE, ZMQ_LINGER, ZMQ_ROUTER_MANDATORY and ZMQ_XPUB_VERBOSE only take effect for subsequent socket bind/connects\&. +.SH "DESCRIPTION" +.sp +The \fIzmq_setsockopt()\fR function shall set the option specified by the \fIoption_name\fR argument to the value pointed to by the \fIoption_value\fR argument for the 0MQ socket pointed to by the \fIsocket\fR argument\&. The \fIoption_len\fR argument is the size of the option value in bytes\&. +.sp +The following socket options can be set with the \fIzmq_setsockopt()\fR function: +.SS "ZMQ_SNDHWM: Set high water mark for outbound messages" +.sp +The \fIZMQ_SNDHWM\fR option shall set the high water mark for outbound messages on the specified \fIsocket\fR\&. The high water mark is a hard limit on the maximum number of outstanding messages 0MQ shall queue in memory for any single peer that the specified \fIsocket\fR is communicating with\&. +.sp +If this limit has been reached the socket shall enter an exceptional state and depending on the socket type, 0MQ shall take appropriate action such as blocking or dropping sent messages\&. Refer to the individual socket descriptions in \fBzmq_socket\fR(3) for details on the exact action taken for each socket type\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +0MQ does not guarantee that the socket will accept as many as ZMQ_SNDHWM messages, and the actual limit may be as much as 60\-70% lower depending on the flow of messages on the socket\&. +.sp .5v +.RE +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +messages +T} +T{ +.sp +Default value +T}:T{ +.sp +1000 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_RCVHWM: Set high water mark for inbound messages" +.sp +The \fIZMQ_RCVHWM\fR option shall set the high water mark for inbound messages on the specified \fIsocket\fR\&. The high water mark is a hard limit on the maximum number of outstanding messages 0MQ shall queue in memory for any single peer that the specified \fIsocket\fR is communicating with\&. +.sp +If this limit has been reached the socket shall enter an exceptional state and depending on the socket type, 0MQ shall take appropriate action such as blocking or dropping sent messages\&. Refer to the individual socket descriptions in \fBzmq_socket\fR(3) for details on the exact action taken for each socket type\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +messages +T} +T{ +.sp +Default value +T}:T{ +.sp +1000 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_AFFINITY: Set I/O thread affinity" +.sp +The \fIZMQ_AFFINITY\fR option shall set the I/O thread affinity for newly created connections on the specified \fIsocket\fR\&. +.sp +Affinity determines which threads from the 0MQ I/O thread pool associated with the socket\(cqs \fIcontext\fR shall handle newly created connections\&. A value of zero specifies no affinity, meaning that work shall be distributed fairly among all 0MQ I/O threads in the thread pool\&. For non\-zero values, the lowest bit corresponds to thread 1, second lowest bit to thread 2 and so on\&. For example, a value of 3 specifies that subsequent connections on \fIsocket\fR shall be handled exclusively by I/O threads 1 and 2\&. +.sp +See also \fBzmq_init\fR(3) for details on allocating the number of I/O threads for a specific \fIcontext\fR\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +uint64_t +T} +T{ +.sp +Option value unit +T}:T{ +.sp +N/A (bitmap) +T} +T{ +.sp +Default value +T}:T{ +.sp +0 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +N/A +T} +.TE +.sp 1 +.SS "ZMQ_SUBSCRIBE: Establish message filter" +.sp +The \fIZMQ_SUBSCRIBE\fR option shall establish a new message filter on a \fIZMQ_SUB\fR socket\&. Newly created \fIZMQ_SUB\fR sockets shall filter out all incoming messages, therefore you should call this option to establish an initial message filter\&. +.sp +An empty \fIoption_value\fR of length zero shall subscribe to all incoming messages\&. A non\-empty \fIoption_value\fR shall subscribe to all messages beginning with the specified prefix\&. Multiple filters may be attached to a single \fIZMQ_SUB\fR socket, in which case a message shall be accepted if it matches at least one filter\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +binary data +T} +T{ +.sp +Option value unit +T}:T{ +.sp +N/A +T} +T{ +.sp +Default value +T}:T{ +.sp +N/A +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +ZMQ_SUB +T} +.TE +.sp 1 +.SS "ZMQ_UNSUBSCRIBE: Remove message filter" +.sp +The \fIZMQ_UNSUBSCRIBE\fR option shall remove an existing message filter on a \fIZMQ_SUB\fR socket\&. The filter specified must match an existing filter previously established with the \fIZMQ_SUBSCRIBE\fR option\&. If the socket has several instances of the same filter attached the \fIZMQ_UNSUBSCRIBE\fR option shall remove only one instance, leaving the rest in place and functional\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +binary data +T} +T{ +.sp +Option value unit +T}:T{ +.sp +N/A +T} +T{ +.sp +Default value +T}:T{ +.sp +N/A +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +ZMQ_SUB +T} +.TE +.sp 1 +.SS "ZMQ_IDENTITY: Set socket identity" +.sp +The \fIZMQ_IDENTITY\fR option shall set the identity of the specified \fIsocket\fR\&. Socket identity is used only by request/reply pattern\&. Namely, it can be used in tandem with ROUTER socket to route messages to the peer with specific identity\&. +.sp +Identity should be at least one byte and at most 255 bytes long\&. Identities starting with binary zero are reserved for use by 0MQ infrastructure\&. +.sp +If two peers use the same identity when connecting to a third peer, the results shall be undefined\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +binary data +T} +T{ +.sp +Option value unit +T}:T{ +.sp +N/A +T} +T{ +.sp +Default value +T}:T{ +.sp +NULL +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_RATE: Set multicast data rate" +.sp +The \fIZMQ_RATE\fR option shall set the maximum send or receive data rate for multicast transports such as \fBzmq_pgm\fR(7) using the specified \fIsocket\fR\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +kilobits per second +T} +T{ +.sp +Default value +T}:T{ +.sp +100 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, when using multicast transports +T} +.TE +.sp 1 +.SS "ZMQ_RECOVERY_IVL: Set multicast recovery interval" +.sp +The \fIZMQ_RECOVERY_IVL\fR option shall set the recovery interval for multicast transports using the specified \fIsocket\fR\&. The recovery interval determines the maximum time in milliseconds that a receiver can be absent from a multicast group before unrecoverable data loss will occur\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBCaution\fR +.ps -1 +.br +.sp +Exercise care when setting large recovery intervals as the data needed for recovery will be held in memory\&. For example, a 1 minute recovery interval at a data rate of 1Gbps requires a 7GB in\-memory buffer\&. +.sp .5v +.RE +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +milliseconds +T} +T{ +.sp +Default value +T}:T{ +.sp +10000 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, when using multicast transports +T} +.TE +.sp 1 +.SS "ZMQ_SNDBUF: Set kernel transmit buffer size" +.sp +The \fIZMQ_SNDBUF\fR option shall set the underlying kernel transmit buffer size for the \fIsocket\fR to the specified size in bytes\&. A value of zero means leave the OS default unchanged\&. For details please refer to your operating system documentation for the \fISO_SNDBUF\fR socket option\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +bytes +T} +T{ +.sp +Default value +T}:T{ +.sp +0 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_RCVBUF: Set kernel receive buffer size" +.sp +The \fIZMQ_RCVBUF\fR option shall set the underlying kernel receive buffer size for the \fIsocket\fR to the specified size in bytes\&. A value of zero means leave the OS default unchanged\&. For details refer to your operating system documentation for the \fISO_RCVBUF\fR socket option\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +bytes +T} +T{ +.sp +Default value +T}:T{ +.sp +0 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_LINGER: Set linger period for socket shutdown" +.sp +The \fIZMQ_LINGER\fR option shall set the linger period for the specified \fIsocket\fR\&. The linger period determines how long pending messages which have yet to be sent to a peer shall linger in memory after a socket is closed with \fBzmq_close\fR(3), and further affects the termination of the socket\(cqs context with \fBzmq_term\fR(3)\&. The following outlines the different behaviours: +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The default value of +\fI\-1\fR +specifies an infinite linger period\&. Pending messages shall not be discarded after a call to +\fIzmq_close()\fR; attempting to terminate the socket\(cqs context with +\fIzmq_term()\fR +shall block until all pending messages have been sent to a peer\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The value of +\fI0\fR +specifies no linger period\&. Pending messages shall be discarded immediately when the socket is closed with +\fIzmq_close()\fR\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +Positive values specify an upper bound for the linger period in milliseconds\&. Pending messages shall not be discarded after a call to +\fIzmq_close()\fR; attempting to terminate the socket\(cqs context with +\fIzmq_term()\fR +shall block until either all pending messages have been sent to a peer, or the linger period expires, after which any pending messages shall be discarded\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +Option value type +T}:T{ +int +T} +T{ +Option value unit +T}:T{ +milliseconds +T} +T{ +Default value +T}:T{ +\-1 (infinite) +T} +T{ +Applicable socket types +T}:T{ +all +T} +.TE +.sp 1 +.RE +.SS "ZMQ_RECONNECT_IVL: Set reconnection interval" +.sp +The \fIZMQ_RECONNECT_IVL\fR option shall set the initial reconnection interval for the specified \fIsocket\fR\&. The reconnection interval is the period 0MQ shall wait between attempts to reconnect disconnected peers when using connection\-oriented transports\&. The value \-1 means no reconnection\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +The reconnection interval may be randomized by 0MQ to prevent reconnection storms in topologies with a large number of peers per socket\&. +.sp .5v +.RE +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +milliseconds +T} +T{ +.sp +Default value +T}:T{ +.sp +100 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, only for connection\-oriented transports +T} +.TE +.sp 1 +.SS "ZMQ_RECONNECT_IVL_MAX: Set maximum reconnection interval" +.sp +The \fIZMQ_RECONNECT_IVL_MAX\fR option shall set the maximum reconnection interval for the specified \fIsocket\fR\&. This is the maximum period 0MQ shall wait between attempts to reconnect\&. On each reconnect attempt, the previous interval shall be doubled untill ZMQ_RECONNECT_IVL_MAX is reached\&. This allows for exponential backoff strategy\&. Default value means no exponential backoff is performed and reconnect interval calculations are only based on ZMQ_RECONNECT_IVL\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +Values less than ZMQ_RECONNECT_IVL will be ignored\&. +.sp .5v +.RE +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +milliseconds +T} +T{ +.sp +Default value +T}:T{ +.sp +0 (only use ZMQ_RECONNECT_IVL) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, only for connection\-oriented transports +T} +.TE +.sp 1 +.SS "ZMQ_BACKLOG: Set maximum length of the queue of outstanding connections" +.sp +The \fIZMQ_BACKLOG\fR option shall set the maximum length of the queue of outstanding peer connections for the specified \fIsocket\fR; this only applies to connection\-oriented transports\&. For details refer to your operating system documentation for the \fIlisten\fR function\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +connections +T} +T{ +.sp +Default value +T}:T{ +.sp +100 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, only for connection\-oriented transports\&. +T} +.TE +.sp 1 +.SS "ZMQ_MAXMSGSIZE: Maximum acceptable inbound message size" +.sp +Limits the size of the inbound message\&. If a peer sends a message larger than ZMQ_MAXMSGSIZE it is disconnected\&. Value of \-1 means \fIno limit\fR\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int64_t +T} +T{ +.sp +Option value unit +T}:T{ +.sp +bytes +T} +T{ +.sp +Default value +T}:T{ +.sp +\-1 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_MULTICAST_HOPS: Maximum network hops for multicast packets" +.sp +Sets the time\-to\-live field in every multicast packet sent from this socket\&. The default is 1 which means that the multicast packets don\(cqt leave the local network\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +network hops +T} +T{ +.sp +Default value +T}:T{ +.sp +1 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, when using multicast transports +T} +.TE +.sp 1 +.SS "ZMQ_RCVTIMEO: Maximum time before a recv operation returns with EAGAIN" +.sp +Sets the timeout for receive operation on the socket\&. If the value is 0, \fIzmq_recv(3)\fR will return immediately, with a EAGAIN error if there is no message to receive\&. If the value is \-1, it will block until a message is available\&. For all other values, it will wait for a message for that amount of time before returning with an EAGAIN error\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +milliseconds +T} +T{ +.sp +Default value +T}:T{ +.sp +\-1 (infinite) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_SNDTIMEO: Maximum time before a send operation returns with EAGAIN" +.sp +Sets the timeout for send operation on the socket\&. If the value is 0, \fIzmq_send(3)\fR will return immediately, with a EAGAIN error if the message cannot be sent\&. If the value is \-1, it will block until the message is sent\&. For all other values, it will try to send the message for that amount of time before returning with an EAGAIN error\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +milliseconds +T} +T{ +.sp +Default value +T}:T{ +.sp +\-1 (infinite) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all +T} +.TE +.sp 1 +.SS "ZMQ_IPV4ONLY: Use IPv4\-only sockets" +.sp +Sets the underlying native socket type\&. A value of 1 will use IPv4 sockets, while the value of 0 will use IPv6 sockets\&. An IPv6 socket lets applications connect to and accept connections from both IPv4 and IPv6 hosts\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +boolean +T} +T{ +.sp +Default value +T}:T{ +.sp +1 (true) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, when using TCP transports\&. +T} +.TE +.sp 1 +.SS "ZMQ_DELAY_ATTACH_ON_CONNECT: Accept messages only when connections are made" +.sp +If set to 1, will delay the attachment of a pipe on connect until the underlying connection has completed\&. This will cause the socket to block if there are no other connections, but will prevent queues from filling on pipes awaiting connection\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +boolean +T} +T{ +.sp +Default value +T}:T{ +.sp +0 (false) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all, only for connection\-oriented transports\&. +T} +.TE +.sp 1 +.SS "ZMQ_ROUTER_MANDATORY: accept only routable messages on ROUTER sockets" +.sp +Sets the \fIROUTER\fR socket behavior when an unroutable message is encountered\&. A value of 0 is the default and discards the message silently when it cannot be routed\&. A value of 1 returns an \fIEHOSTUNREACH\fR error code if the message cannot be routed\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +0, 1 +T} +T{ +.sp +Default value +T}:T{ +.sp +0 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +ZMQ_ROUTER +T} +.TE +.sp 1 +.SS "ZMQ_XPUB_VERBOSE: provide all subscription messages on XPUB sockets" +.sp +Sets the \fIXPUB\fR socket behavior on new subscriptions and unsubscriptions\&. A value of \fI0\fR is the default and passes only new subscription messages to upstream\&. A value of \fI1\fR passes all subscription messages upstream\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +int +T} +T{ +.sp +Option value unit +T}:T{ +.sp +0, 1 +T} +T{ +.sp +Default value +T}:T{ +.sp +0 +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +ZMQ_XPUB +T} +.TE +.sp 1 +.SS "ZMQ_TCP_KEEPALIVE: Override SO_KEEPALIVE socket option" +.sp +Override \fISO_KEEPALIVE\fR socket option(where supported by OS)\&. 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Filter is a null\-terminated string with ipv6 or ipv4 CIDR\&. +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Option value type +T}:T{ +.sp +binary data +T} +T{ +.sp +Option value unit +T}:T{ +.sp +N/A +T} +T{ +.sp +Default value +T}:T{ +.sp +no filters (allow from all) +T} +T{ +.sp +Applicable socket types +T}:T{ +.sp +all listening sockets, when using TCP transports\&. +T} +.TE +.sp 1 +.SH "RETURN VALUE" +.sp +The \fIzmq_setsockopt()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +The requested option +\fIoption_name\fR +is unknown, or the requested +\fIoption_len\fR +or +\fIoption_value\fR +is invalid\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.PP +\fBEINTR\fR +.RS 4 +The operation was interrupted by delivery of a signal\&. +.RE +.SH "EXAMPLE" +.PP +\fBSubscribing to messages on a ZMQ_SUB socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Subscribe to all messages */ +rc = zmq_setsockopt (socket, ZMQ_SUBSCRIBE, "", 0); +assert (rc == 0); +/* Subscribe to messages prefixed with "ANIMALS\&.CATS" */ +rc = zmq_setsockopt (socket, ZMQ_SUBSCRIBE, "ANIMALS\&.CATS", 12); +.fi +.if n \{\ +.RE +.\} +.PP +\fBSetting I/O thread affinity\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +int64_t affinity; +/* Incoming connections on TCP port 5555 shall be handled by I/O thread 1 */ +affinity = 1; +rc = zmq_setsockopt (socket, ZMQ_AFFINITY, &affinity, sizeof affinity); +assert (rc); +rc = zmq_bind (socket, "tcp://lo:5555"); +assert (rc); +/* Incoming connections on TCP port 5556 shall be handled by I/O thread 2 */ +affinity = 2; +rc = zmq_setsockopt (socket, ZMQ_AFFINITY, &affinity, sizeof affinity); +assert (rc); +rc = zmq_bind (socket, "tcp://lo:5556"); +assert (rc); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_getsockopt\fR(3) \fBzmq_socket\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_setsockopt.html b/doc/zmq_setsockopt.html new file mode 100644 index 0000000..8bdb475 --- /dev/null +++ b/doc/zmq_setsockopt.html @@ -0,0 +1,2381 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+</script>
+</head>
+<body class="manpage">
+<div id="header">
+<h1>
+zmq_setsockopt(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_setsockopt -
+ set 0MQ socket options
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_setsockopt (void <em>*socket</em>, int <em>option_name</em>, const void <em>*option_value</em>, size_t <em>option_len</em>);</strong></p></div>
+<div class="paragraph"><p>Caution: All options, with the exception of ZMQ_SUBSCRIBE, ZMQ_UNSUBSCRIBE,
+ZMQ_LINGER, ZMQ_ROUTER_MANDATORY and ZMQ_XPUB_VERBOSE only take effect for
+subsequent socket bind/connects.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_setsockopt()</em> function shall set the option specified by the
+<em>option_name</em> argument to the value pointed to by the <em>option_value</em> argument
+for the ØMQ socket pointed to by the <em>socket</em> argument. The <em>option_len</em>
+argument is the size of the option value in bytes.</p></div>
+<div class="paragraph"><p>The following socket options can be set with the <em>zmq_setsockopt()</em> function:</p></div>
+<div class="sect2">
+<h3 id="_zmq_sndhwm_set_high_water_mark_for_outbound_messages">ZMQ_SNDHWM: Set high water mark for outbound messages</h3>
+<div class="paragraph"><p>The <em>ZMQ_SNDHWM</em> option shall set the high water mark for outbound messages on
+the specified <em>socket</em>. The high water mark is a hard limit on the maximum
+number of outstanding messages ØMQ shall queue in memory for any single peer
+that the specified <em>socket</em> is communicating with.</p></div>
+<div class="paragraph"><p>If this limit has been reached the socket shall enter an exceptional state and
+depending on the socket type, ØMQ shall take appropriate action such as
+blocking or dropping sent messages. Refer to the individual socket descriptions
+in <a href="zmq_socket.html">zmq_socket(3)</a> for details on the exact action taken for each socket
+type.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">ØMQ does not guarantee that the socket will accept as many as ZMQ_SNDHWM
+messages, and the actual limit may be as much as 60-70% lower depending on the
+flow of messages on the socket.</td>
+</tr></table>
+</div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+messages
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+1000
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rcvhwm_set_high_water_mark_for_inbound_messages">ZMQ_RCVHWM: Set high water mark for inbound messages</h3>
+<div class="paragraph"><p>The <em>ZMQ_RCVHWM</em> option shall set the high water mark for inbound messages on
+the specified <em>socket</em>. The high water mark is a hard limit on the maximum
+number of outstanding messages ØMQ shall queue in memory for any single peer
+that the specified <em>socket</em> is communicating with.</p></div>
+<div class="paragraph"><p>If this limit has been reached the socket shall enter an exceptional state and
+depending on the socket type, ØMQ shall take appropriate action such as
+blocking or dropping sent messages. Refer to the individual socket descriptions
+in <a href="zmq_socket.html">zmq_socket(3)</a> for details on the exact action taken for each socket
+type.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+messages
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+1000
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_affinity_set_i_o_thread_affinity">ZMQ_AFFINITY: Set I/O thread affinity</h3>
+<div class="paragraph"><p>The <em>ZMQ_AFFINITY</em> option shall set the I/O thread affinity for newly created
+connections on the specified <em>socket</em>.</p></div>
+<div class="paragraph"><p>Affinity determines which threads from the ØMQ I/O thread pool associated with
+the socket’s <em>context</em> shall handle newly created connections. A value of zero
+specifies no affinity, meaning that work shall be distributed fairly among all
+ØMQ I/O threads in the thread pool. For non-zero values, the lowest bit
+corresponds to thread 1, second lowest bit to thread 2 and so on. For example,
+a value of 3 specifies that subsequent connections on <em>socket</em> shall be handled
+exclusively by I/O threads 1 and 2.</p></div>
+<div class="paragraph"><p>See also <a href="zmq_init.html">zmq_init(3)</a> for details on allocating the number of I/O
+threads for a specific <em>context</em>.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+uint64_t
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A (bitmap)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_subscribe_establish_message_filter">ZMQ_SUBSCRIBE: Establish message filter</h3>
+<div class="paragraph"><p>The <em>ZMQ_SUBSCRIBE</em> option shall establish a new message filter on a <em>ZMQ_SUB</em>
+socket. Newly created <em>ZMQ_SUB</em> sockets shall filter out all incoming messages,
+therefore you should call this option to establish an initial message filter.</p></div>
+<div class="paragraph"><p>An empty <em>option_value</em> of length zero shall subscribe to all incoming
+messages. A non-empty <em>option_value</em> shall subscribe to all messages beginning
+with the specified prefix. Multiple filters may be attached to a single
+<em>ZMQ_SUB</em> socket, in which case a message shall be accepted if it matches at
+least one filter.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+binary data
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+ZMQ_SUB
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_unsubscribe_remove_message_filter">ZMQ_UNSUBSCRIBE: Remove message filter</h3>
+<div class="paragraph"><p>The <em>ZMQ_UNSUBSCRIBE</em> option shall remove an existing message filter on a
+<em>ZMQ_SUB</em> socket. The filter specified must match an existing filter previously
+established with the <em>ZMQ_SUBSCRIBE</em> option. If the socket has several
+instances of the same filter attached the <em>ZMQ_UNSUBSCRIBE</em> option shall remove
+only one instance, leaving the rest in place and functional.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+binary data
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+ZMQ_SUB
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_identity_set_socket_identity">ZMQ_IDENTITY: Set socket identity</h3>
+<div class="paragraph"><p>The <em>ZMQ_IDENTITY</em> option shall set the identity of the specified <em>socket</em>.
+Socket identity is used only by request/reply pattern. Namely, it can be used
+in tandem with ROUTER socket to route messages to the peer with specific
+identity.</p></div>
+<div class="paragraph"><p>Identity should be at least one byte and at most 255 bytes long. Identities
+starting with binary zero are reserved for use by ØMQ infrastructure.</p></div>
+<div class="paragraph"><p>If two peers use the same identity when connecting to a third peer, the
+results shall be undefined.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+binary data
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+NULL
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rate_set_multicast_data_rate">ZMQ_RATE: Set multicast data rate</h3>
+<div class="paragraph"><p>The <em>ZMQ_RATE</em> option shall set the maximum send or receive data rate for
+multicast transports such as <a href="zmq_pgm.html">zmq_pgm(7)</a> using the specified <em>socket</em>.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+kilobits per second
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+100
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using multicast transports
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_recovery_ivl_set_multicast_recovery_interval">ZMQ_RECOVERY_IVL: Set multicast recovery interval</h3>
+<div class="paragraph"><p>The <em>ZMQ_RECOVERY_IVL</em> option shall set the recovery interval for multicast
+transports using the specified <em>socket</em>. The recovery interval determines the
+maximum time in milliseconds that a receiver can be absent from a multicast
+group before unrecoverable data loss will occur.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Caution</div>
+</td>
+<td class="content">Exercise care when setting large recovery intervals as the data
+needed for recovery will be held in memory. For example, a 1 minute recovery
+interval at a data rate of 1Gbps requires a 7GB in-memory buffer.</td>
+</tr></table>
+</div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+10000
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using multicast transports
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_sndbuf_set_kernel_transmit_buffer_size">ZMQ_SNDBUF: Set kernel transmit buffer size</h3>
+<div class="paragraph"><p>The <em>ZMQ_SNDBUF</em> option shall set the underlying kernel transmit buffer size
+for the <em>socket</em> to the specified size in bytes. A value of zero means leave
+the OS default unchanged. For details please refer to your operating system
+documentation for the <em>SO_SNDBUF</em> socket option.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+bytes
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rcvbuf_set_kernel_receive_buffer_size">ZMQ_RCVBUF: Set kernel receive buffer size</h3>
+<div class="paragraph"><p>The <em>ZMQ_RCVBUF</em> option shall set the underlying kernel receive buffer size for
+the <em>socket</em> to the specified size in bytes. A value of zero means leave the
+OS default unchanged. For details refer to your operating system documentation
+for the <em>SO_RCVBUF</em> socket option.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+bytes
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_linger_set_linger_period_for_socket_shutdown">ZMQ_LINGER: Set linger period for socket shutdown</h3>
+<div class="paragraph"><p>The <em>ZMQ_LINGER</em> option shall set the linger period for the specified <em>socket</em>.
+The linger period determines how long pending messages which have yet to be
+sent to a peer shall linger in memory after a socket is closed with
+<a href="zmq_close.html">zmq_close(3)</a>, and further affects the termination of the socket’s
+context with <a href="zmq_term.html">zmq_term(3)</a>. The following outlines the different
+behaviours:</p></div>
+<div class="ulist"><ul>
+<li>
+<p>
+The default value of <em>-1</em> specifies an infinite linger period. Pending
+ messages shall not be discarded after a call to <em>zmq_close()</em>; attempting to
+ terminate the socket’s context with <em>zmq_term()</em> shall block until all
+ pending messages have been sent to a peer.
+</p>
+</li>
+<li>
+<p>
+The value of <em>0</em> specifies no linger period. Pending messages shall be
+ discarded immediately when the socket is closed with <em>zmq_close()</em>.
+</p>
+</li>
+<li>
+<p>
+Positive values specify an upper bound for the linger period in milliseconds.
+ Pending messages shall not be discarded after a call to <em>zmq_close()</em>;
+ attempting to terminate the socket’s context with <em>zmq_term()</em> shall block
+ until either all pending messages have been sent to a peer, or the linger
+ period expires, after which any pending messages shall be discarded.
+</p>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (infinite)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</li>
+</ul></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_reconnect_ivl_set_reconnection_interval">ZMQ_RECONNECT_IVL: Set reconnection interval</h3>
+<div class="paragraph"><p>The <em>ZMQ_RECONNECT_IVL</em> option shall set the initial reconnection interval for
+the specified <em>socket</em>. The reconnection interval is the period ØMQ
+shall wait between attempts to reconnect disconnected peers when using
+connection-oriented transports. The value -1 means no reconnection.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">The reconnection interval may be randomized by ØMQ to prevent
+reconnection storms in topologies with a large number of peers per socket.</td>
+</tr></table>
+</div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+100
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, only for connection-oriented transports
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_reconnect_ivl_max_set_maximum_reconnection_interval">ZMQ_RECONNECT_IVL_MAX: Set maximum reconnection interval</h3>
+<div class="paragraph"><p>The <em>ZMQ_RECONNECT_IVL_MAX</em> option shall set the maximum reconnection interval
+for the specified <em>socket</em>. This is the maximum period ØMQ shall wait between
+attempts to reconnect. On each reconnect attempt, the previous interval shall be
+doubled untill ZMQ_RECONNECT_IVL_MAX is reached. This allows for exponential
+backoff strategy. Default value means no exponential backoff is performed and
+reconnect interval calculations are only based on ZMQ_RECONNECT_IVL.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">Values less than ZMQ_RECONNECT_IVL will be ignored.</td>
+</tr></table>
+</div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0 (only use ZMQ_RECONNECT_IVL)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, only for connection-oriented transports
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_backlog_set_maximum_length_of_the_queue_of_outstanding_connections">ZMQ_BACKLOG: Set maximum length of the queue of outstanding connections</h3>
+<div class="paragraph"><p>The <em>ZMQ_BACKLOG</em> option shall set the maximum length of the queue of
+outstanding peer connections for the specified <em>socket</em>; this only applies to
+connection-oriented transports. For details refer to your operating system
+documentation for the <em>listen</em> function.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+connections
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+100
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, only for connection-oriented transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_maxmsgsize_maximum_acceptable_inbound_message_size">ZMQ_MAXMSGSIZE: Maximum acceptable inbound message size</h3>
+<div class="paragraph"><p>Limits the size of the inbound message. If a peer sends a message larger than
+ZMQ_MAXMSGSIZE it is disconnected. Value of -1 means <em>no limit</em>.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int64_t
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+bytes
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_multicast_hops_maximum_network_hops_for_multicast_packets">ZMQ_MULTICAST_HOPS: Maximum network hops for multicast packets</h3>
+<div class="paragraph"><p>Sets the time-to-live field in every multicast packet sent from this socket.
+The default is 1 which means that the multicast packets don’t leave the local
+network.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+network hops
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+1
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using multicast transports
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rcvtimeo_maximum_time_before_a_recv_operation_returns_with_eagain">ZMQ_RCVTIMEO: Maximum time before a recv operation returns with EAGAIN</h3>
+<div class="paragraph"><p>Sets the timeout for receive operation on the socket. If the value is <tt>0</tt>,
+<em>zmq_recv(3)</em> will return immediately, with a EAGAIN error if there is no
+message to receive. If the value is <tt>-1</tt>, it will block until a message is
+available. For all other values, it will wait for a message for that amount
+of time before returning with an EAGAIN error.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (infinite)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_sndtimeo_maximum_time_before_a_send_operation_returns_with_eagain">ZMQ_SNDTIMEO: Maximum time before a send operation returns with EAGAIN</h3>
+<div class="paragraph"><p>Sets the timeout for send operation on the socket. If the value is <tt>0</tt>,
+<em>zmq_send(3)</em> will return immediately, with a EAGAIN error if the message
+cannot be sent. If the value is <tt>-1</tt>, it will block until the message is sent.
+For all other values, it will try to send the message for that amount of time
+before returning with an EAGAIN error.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (infinite)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_ipv4only_use_ipv4_only_sockets">ZMQ_IPV4ONLY: Use IPv4-only sockets</h3>
+<div class="paragraph"><p>Sets the underlying native socket type. A value of <tt>1</tt> will use IPv4 sockets,
+while the value of <tt>0</tt> will use IPv6 sockets. An IPv6 socket lets
+applications connect to and accept connections from both IPv4 and IPv6 hosts.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+boolean
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+1 (true)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using TCP transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_delay_attach_on_connect_accept_messages_only_when_connections_are_made">ZMQ_DELAY_ATTACH_ON_CONNECT: Accept messages only when connections are made</h3>
+<div class="paragraph"><p>If set to <tt>1</tt>, will delay the attachment of a pipe on connect until the underlying
+connection has completed. This will cause the socket to block if there are no other
+connections, but will prevent queues from filling on pipes awaiting connection.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+boolean
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0 (false)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, only for connection-oriented transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_router_mandatory_accept_only_routable_messages_on_router_sockets">ZMQ_ROUTER_MANDATORY: accept only routable messages on ROUTER sockets</h3>
+<div class="paragraph"><p>Sets the <em>ROUTER</em> socket behavior when an unroutable message is encountered. A
+value of <tt>0</tt> is the default and discards the message silently when it cannot be
+routed. A value of <tt>1</tt> returns an <em>EHOSTUNREACH</em> error code if the message
+cannot be routed.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0, 1
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+ZMQ_ROUTER
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_xpub_verbose_provide_all_subscription_messages_on_xpub_sockets">ZMQ_XPUB_VERBOSE: provide all subscription messages on XPUB sockets</h3>
+<div class="paragraph"><p>Sets the <em>XPUB</em> socket behavior on new subscriptions and unsubscriptions.
+A value of <em>0</em> is the default and passes only new subscription messages to
+upstream. A value of <em>1</em> passes all subscription messages upstream.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0, 1
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+ZMQ_XPUB
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_tcp_keepalive_override_so_keepalive_socket_option">ZMQ_TCP_KEEPALIVE: Override SO_KEEPALIVE socket option</h3>
+<div class="paragraph"><p>Override <em>SO_KEEPALIVE</em> socket option(where supported by OS).
+The default value of <tt>-1</tt> means to skip any overrides and leave it to OS default.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1,0,1
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (leave to OS default)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using TCP transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_tcp_keepalive_idle_override_tcp_keepcnt_or_tcp_keepalive_on_some_os">ZMQ_TCP_KEEPALIVE_IDLE: Override TCP_KEEPCNT(or TCP_KEEPALIVE on some OS)</h3>
+<div class="paragraph"><p>Override <em>TCP_KEEPCNT</em>(or <em>TCP_KEEPALIVE</em> on some OS) socket option(where supported by OS).
+The default value of <tt>-1</tt> means to skip any overrides and leave it to OS default.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1,>0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (leave to OS default)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using TCP transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_tcp_keepalive_cnt_override_tcp_keepcnt_socket_option">ZMQ_TCP_KEEPALIVE_CNT: Override TCP_KEEPCNT socket option</h3>
+<div class="paragraph"><p>Override <em>TCP_KEEPCNT</em> socket option(where supported by OS).
+The default value of <tt>-1</tt> means to skip any overrides and leave it to OS default.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1,>0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (leave to OS default)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using TCP transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_tcp_keepalive_intvl_override_tcp_keepintvl_socket_option">ZMQ_TCP_KEEPALIVE_INTVL: Override TCP_KEEPINTVL socket option</h3>
+<div class="paragraph"><p>Override <em>TCP_KEEPINTVL</em> socket option(where supported by OS).
+The default value of <tt>-1</tt> means to skip any overrides and leave it to OS default.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1,>0
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (leave to OS default)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all, when using TCP transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_tcp_accept_filter_assign_filters_to_allow_new_tcp_connections">ZMQ_TCP_ACCEPT_FILTER: Assign filters to allow new TCP connections</h3>
+<div class="paragraph"><p>Assign arbitrary number of filters that will be applied for each new TCP transport
+connection on a listening socket.
+If no filters applied, then TCP transport allows connections from any ip.
+If at least one filter is applied then new connection source ip should be matched.
+To clear all filters call zmq_setsockopt(socket, ZMQ_TCP_ACCEPT_FILTER, NULL, 0).
+Filter is a null-terminated string with ipv6 or ipv4 CIDR.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+binary data
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+no filters (allow from all)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all listening sockets, when using TCP transports.
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_setsockopt()</em> function shall return zero if successful. Otherwise it
+shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The requested option <em>option_name</em> is unknown, or the requested <em>option_len</em> or
+<em>option_value</em> is invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINTR</strong>
+</dt>
+<dd>
+<p>
+The operation was interrupted by delivery of a signal.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Subscribing to messages on a <em>ZMQ_SUB</em> socket</div>
+<div class="content">
+<pre><tt>/* Subscribe to all messages */
+rc = zmq_setsockopt (socket, ZMQ_SUBSCRIBE, "", 0);
+assert (rc == 0);
+/* Subscribe to messages prefixed with "ANIMALS.CATS" */
+rc = zmq_setsockopt (socket, ZMQ_SUBSCRIBE, "ANIMALS.CATS", 12);</tt></pre>
+</div></div>
+<div class="listingblock">
+<div class="title">Setting I/O thread affinity</div>
+<div class="content">
+<pre><tt>int64_t affinity;
+/* Incoming connections on TCP port 5555 shall be handled by I/O thread 1 */
+affinity = 1;
+rc = zmq_setsockopt (socket, ZMQ_AFFINITY, &affinity, sizeof affinity);
+assert (rc);
+rc = zmq_bind (socket, "tcp://lo:5555");
+assert (rc);
+/* Incoming connections on TCP port 5556 shall be handled by I/O thread 2 */
+affinity = 2;
+rc = zmq_setsockopt (socket, ZMQ_AFFINITY, &affinity, sizeof affinity);
+assert (rc);
+rc = zmq_bind (socket, "tcp://lo:5556");
+assert (rc);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_getsockopt.html">zmq_getsockopt(3)</a>
+<a href="zmq_socket.html">zmq_socket(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-11-23 16:54:28 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_setsockopt.txt b/doc/zmq_setsockopt.txt new file mode 100644 index 0000000..de4c61f --- /dev/null +++ b/doc/zmq_setsockopt.txt @@ -0,0 +1,523 @@ +zmq_setsockopt(3) +================= + + +NAME +---- + +zmq_setsockopt - set 0MQ socket options + + +SYNOPSIS +-------- +*int zmq_setsockopt (void '*socket', int 'option_name', const void '*option_value', size_t 'option_len');* + +Caution: All options, with the exception of ZMQ_SUBSCRIBE, ZMQ_UNSUBSCRIBE, +ZMQ_LINGER, ZMQ_ROUTER_MANDATORY and ZMQ_XPUB_VERBOSE only take effect for +subsequent socket bind/connects. + +DESCRIPTION +----------- +The _zmq_setsockopt()_ function shall set the option specified by the +'option_name' argument to the value pointed to by the 'option_value' argument +for the 0MQ socket pointed to by the 'socket' argument. The 'option_len' +argument is the size of the option value in bytes. + +The following socket options can be set with the _zmq_setsockopt()_ function: + + +ZMQ_SNDHWM: Set high water mark for outbound messages +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_SNDHWM' option shall set the high water mark for outbound messages on +the specified 'socket'. The high water mark is a hard limit on the maximum +number of outstanding messages 0MQ shall queue in memory for any single peer +that the specified 'socket' is communicating with. + +If this limit has been reached the socket shall enter an exceptional state and +depending on the socket type, 0MQ shall take appropriate action such as +blocking or dropping sent messages. Refer to the individual socket descriptions +in linkzmq:zmq_socket[3] for details on the exact action taken for each socket +type. + +NOTE: 0MQ does not guarantee that the socket will accept as many as ZMQ_SNDHWM +messages, and the actual limit may be as much as 60-70% lower depending on the +flow of messages on the socket. + +[horizontal] +Option value type:: int +Option value unit:: messages +Default value:: 1000 +Applicable socket types:: all + + +ZMQ_RCVHWM: Set high water mark for inbound messages +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RCVHWM' option shall set the high water mark for inbound messages on +the specified 'socket'. The high water mark is a hard limit on the maximum +number of outstanding messages 0MQ shall queue in memory for any single peer +that the specified 'socket' is communicating with. + +If this limit has been reached the socket shall enter an exceptional state and +depending on the socket type, 0MQ shall take appropriate action such as +blocking or dropping sent messages. Refer to the individual socket descriptions +in linkzmq:zmq_socket[3] for details on the exact action taken for each socket +type. + +[horizontal] +Option value type:: int +Option value unit:: messages +Default value:: 1000 +Applicable socket types:: all + + +ZMQ_AFFINITY: Set I/O thread affinity +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_AFFINITY' option shall set the I/O thread affinity for newly created +connections on the specified 'socket'. + +Affinity determines which threads from the 0MQ I/O thread pool associated with +the socket's _context_ shall handle newly created connections. A value of zero +specifies no affinity, meaning that work shall be distributed fairly among all +0MQ I/O threads in the thread pool. For non-zero values, the lowest bit +corresponds to thread 1, second lowest bit to thread 2 and so on. For example, +a value of 3 specifies that subsequent connections on 'socket' shall be handled +exclusively by I/O threads 1 and 2. + +See also linkzmq:zmq_init[3] for details on allocating the number of I/O +threads for a specific _context_. + +[horizontal] +Option value type:: uint64_t +Option value unit:: N/A (bitmap) +Default value:: 0 +Applicable socket types:: N/A + + +ZMQ_SUBSCRIBE: Establish message filter +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_SUBSCRIBE' option shall establish a new message filter on a 'ZMQ_SUB' +socket. Newly created 'ZMQ_SUB' sockets shall filter out all incoming messages, +therefore you should call this option to establish an initial message filter. + +An empty 'option_value' of length zero shall subscribe to all incoming +messages. A non-empty 'option_value' shall subscribe to all messages beginning +with the specified prefix. Multiple filters may be attached to a single +'ZMQ_SUB' socket, in which case a message shall be accepted if it matches at +least one filter. + +[horizontal] +Option value type:: binary data +Option value unit:: N/A +Default value:: N/A +Applicable socket types:: ZMQ_SUB + + +ZMQ_UNSUBSCRIBE: Remove message filter +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_UNSUBSCRIBE' option shall remove an existing message filter on a +'ZMQ_SUB' socket. The filter specified must match an existing filter previously +established with the 'ZMQ_SUBSCRIBE' option. If the socket has several +instances of the same filter attached the 'ZMQ_UNSUBSCRIBE' option shall remove +only one instance, leaving the rest in place and functional. + +[horizontal] +Option value type:: binary data +Option value unit:: N/A +Default value:: N/A +Applicable socket types:: ZMQ_SUB + + +ZMQ_IDENTITY: Set socket identity +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_IDENTITY' option shall set the identity of the specified 'socket'. +Socket identity is used only by request/reply pattern. Namely, it can be used +in tandem with ROUTER socket to route messages to the peer with specific +identity. + +Identity should be at least one byte and at most 255 bytes long. Identities +starting with binary zero are reserved for use by 0MQ infrastructure. + +If two peers use the same identity when connecting to a third peer, the +results shall be undefined. + +[horizontal] +Option value type:: binary data +Option value unit:: N/A +Default value:: NULL +Applicable socket types:: all + + +ZMQ_RATE: Set multicast data rate +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RATE' option shall set the maximum send or receive data rate for +multicast transports such as linkzmq:zmq_pgm[7] using the specified 'socket'. + +[horizontal] +Option value type:: int +Option value unit:: kilobits per second +Default value:: 100 +Applicable socket types:: all, when using multicast transports + + +ZMQ_RECOVERY_IVL: Set multicast recovery interval +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RECOVERY_IVL' option shall set the recovery interval for multicast +transports using the specified 'socket'. The recovery interval determines the +maximum time in milliseconds that a receiver can be absent from a multicast +group before unrecoverable data loss will occur. + +CAUTION: Exercise care when setting large recovery intervals as the data +needed for recovery will be held in memory. For example, a 1 minute recovery +interval at a data rate of 1Gbps requires a 7GB in-memory buffer. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: 10000 +Applicable socket types:: all, when using multicast transports + +ZMQ_SNDBUF: Set kernel transmit buffer size +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_SNDBUF' option shall set the underlying kernel transmit buffer size +for the 'socket' to the specified size in bytes. A value of zero means leave +the OS default unchanged. For details please refer to your operating system +documentation for the 'SO_SNDBUF' socket option. + +[horizontal] +Option value type:: int +Option value unit:: bytes +Default value:: 0 +Applicable socket types:: all + + +ZMQ_RCVBUF: Set kernel receive buffer size +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RCVBUF' option shall set the underlying kernel receive buffer size for +the 'socket' to the specified size in bytes. A value of zero means leave the +OS default unchanged. For details refer to your operating system documentation +for the 'SO_RCVBUF' socket option. + +[horizontal] +Option value type:: int +Option value unit:: bytes +Default value:: 0 +Applicable socket types:: all + + +ZMQ_LINGER: Set linger period for socket shutdown +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_LINGER' option shall set the linger period for the specified 'socket'. +The linger period determines how long pending messages which have yet to be +sent to a peer shall linger in memory after a socket is closed with +linkzmq:zmq_close[3], and further affects the termination of the socket's +context with linkzmq:zmq_term[3]. The following outlines the different +behaviours: + +* The default value of '-1' specifies an infinite linger period. Pending + messages shall not be discarded after a call to _zmq_close()_; attempting to + terminate the socket's context with _zmq_term()_ shall block until all + pending messages have been sent to a peer. + +* The value of '0' specifies no linger period. Pending messages shall be + discarded immediately when the socket is closed with _zmq_close()_. + +* Positive values specify an upper bound for the linger period in milliseconds. + Pending messages shall not be discarded after a call to _zmq_close()_; + attempting to terminate the socket's context with _zmq_term()_ shall block + until either all pending messages have been sent to a peer, or the linger + period expires, after which any pending messages shall be discarded. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: -1 (infinite) +Applicable socket types:: all + + +ZMQ_RECONNECT_IVL: Set reconnection interval +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RECONNECT_IVL' option shall set the initial reconnection interval for +the specified 'socket'. The reconnection interval is the period 0MQ +shall wait between attempts to reconnect disconnected peers when using +connection-oriented transports. The value -1 means no reconnection. + +NOTE: The reconnection interval may be randomized by 0MQ to prevent +reconnection storms in topologies with a large number of peers per socket. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: 100 +Applicable socket types:: all, only for connection-oriented transports + + +ZMQ_RECONNECT_IVL_MAX: Set maximum reconnection interval +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_RECONNECT_IVL_MAX' option shall set the maximum reconnection interval +for the specified 'socket'. This is the maximum period 0MQ shall wait between +attempts to reconnect. On each reconnect attempt, the previous interval shall be +doubled untill ZMQ_RECONNECT_IVL_MAX is reached. This allows for exponential +backoff strategy. Default value means no exponential backoff is performed and +reconnect interval calculations are only based on ZMQ_RECONNECT_IVL. + +NOTE: Values less than ZMQ_RECONNECT_IVL will be ignored. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: 0 (only use ZMQ_RECONNECT_IVL) +Applicable socket types:: all, only for connection-oriented transports + + +ZMQ_BACKLOG: Set maximum length of the queue of outstanding connections +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_BACKLOG' option shall set the maximum length of the queue of +outstanding peer connections for the specified 'socket'; this only applies to +connection-oriented transports. For details refer to your operating system +documentation for the 'listen' function. + +[horizontal] +Option value type:: int +Option value unit:: connections +Default value:: 100 +Applicable socket types:: all, only for connection-oriented transports. + + +ZMQ_MAXMSGSIZE: Maximum acceptable inbound message size +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Limits the size of the inbound message. If a peer sends a message larger than +ZMQ_MAXMSGSIZE it is disconnected. Value of -1 means 'no limit'. + +[horizontal] +Option value type:: int64_t +Option value unit:: bytes +Default value:: -1 +Applicable socket types:: all + + +ZMQ_MULTICAST_HOPS: Maximum network hops for multicast packets +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Sets the time-to-live field in every multicast packet sent from this socket. +The default is 1 which means that the multicast packets don't leave the local +network. + +[horizontal] +Option value type:: int +Option value unit:: network hops +Default value:: 1 +Applicable socket types:: all, when using multicast transports + + +ZMQ_RCVTIMEO: Maximum time before a recv operation returns with EAGAIN +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Sets the timeout for receive operation on the socket. If the value is `0`, +_zmq_recv(3)_ will return immediately, with a EAGAIN error if there is no +message to receive. If the value is `-1`, it will block until a message is +available. For all other values, it will wait for a message for that amount +of time before returning with an EAGAIN error. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: -1 (infinite) +Applicable socket types:: all + + +ZMQ_SNDTIMEO: Maximum time before a send operation returns with EAGAIN +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Sets the timeout for send operation on the socket. If the value is `0`, +_zmq_send(3)_ will return immediately, with a EAGAIN error if the message +cannot be sent. If the value is `-1`, it will block until the message is sent. +For all other values, it will try to send the message for that amount of time +before returning with an EAGAIN error. + +[horizontal] +Option value type:: int +Option value unit:: milliseconds +Default value:: -1 (infinite) +Applicable socket types:: all + + +ZMQ_IPV4ONLY: Use IPv4-only sockets +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Sets the underlying native socket type. A value of `1` will use IPv4 sockets, +while the value of `0` will use IPv6 sockets. An IPv6 socket lets +applications connect to and accept connections from both IPv4 and IPv6 hosts. + +[horizontal] +Option value type:: int +Option value unit:: boolean +Default value:: 1 (true) +Applicable socket types:: all, when using TCP transports. + + +ZMQ_DELAY_ATTACH_ON_CONNECT: Accept messages only when connections are made +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +If set to `1`, will delay the attachment of a pipe on connect until the underlying +connection has completed. This will cause the socket to block if there are no other +connections, but will prevent queues from filling on pipes awaiting connection. + +[horizontal] +Option value type:: int +Option value unit:: boolean +Default value:: 0 (false) +Applicable socket types:: all, only for connection-oriented transports. + + +ZMQ_ROUTER_MANDATORY: accept only routable messages on ROUTER sockets +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Sets the 'ROUTER' socket behavior when an unroutable message is encountered. A +value of `0` is the default and discards the message silently when it cannot be +routed. A value of `1` returns an 'EHOSTUNREACH' error code if the message +cannot be routed. + +[horizontal] +Option value type:: int +Option value unit:: 0, 1 +Default value:: 0 +Applicable socket types:: ZMQ_ROUTER + + +ZMQ_XPUB_VERBOSE: provide all subscription messages on XPUB sockets +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Sets the 'XPUB' socket behavior on new subscriptions and unsubscriptions. +A value of '0' is the default and passes only new subscription messages to +upstream. A value of '1' passes all subscription messages upstream. + +[horizontal] +Option value type:: int +Option value unit:: 0, 1 +Default value:: 0 +Applicable socket types:: ZMQ_XPUB + + +ZMQ_TCP_KEEPALIVE: Override SO_KEEPALIVE socket option +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Override 'SO_KEEPALIVE' socket option(where supported by OS). +The default value of `-1` means to skip any overrides and leave it to OS default. + +[horizontal] +Option value type:: int +Option value unit:: -1,0,1 +Default value:: -1 (leave to OS default) +Applicable socket types:: all, when using TCP transports. + + +ZMQ_TCP_KEEPALIVE_IDLE: Override TCP_KEEPCNT(or TCP_KEEPALIVE on some OS) +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Override 'TCP_KEEPCNT'(or 'TCP_KEEPALIVE' on some OS) socket option(where supported by OS). +The default value of `-1` means to skip any overrides and leave it to OS default. + +[horizontal] +Option value type:: int +Option value unit:: -1,>0 +Default value:: -1 (leave to OS default) +Applicable socket types:: all, when using TCP transports. + + +ZMQ_TCP_KEEPALIVE_CNT: Override TCP_KEEPCNT socket option +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Override 'TCP_KEEPCNT' socket option(where supported by OS). +The default value of `-1` means to skip any overrides and leave it to OS default. + +[horizontal] +Option value type:: int +Option value unit:: -1,>0 +Default value:: -1 (leave to OS default) +Applicable socket types:: all, when using TCP transports. + + +ZMQ_TCP_KEEPALIVE_INTVL: Override TCP_KEEPINTVL socket option +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Override 'TCP_KEEPINTVL' socket option(where supported by OS). +The default value of `-1` means to skip any overrides and leave it to OS default. + +[horizontal] +Option value type:: int +Option value unit:: -1,>0 +Default value:: -1 (leave to OS default) +Applicable socket types:: all, when using TCP transports. + + +ZMQ_TCP_ACCEPT_FILTER: Assign filters to allow new TCP connections +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Assign arbitrary number of filters that will be applied for each new TCP transport +connection on a listening socket. +If no filters applied, then TCP transport allows connections from any ip. +If at least one filter is applied then new connection source ip should be matched. +To clear all filters call zmq_setsockopt(socket, ZMQ_TCP_ACCEPT_FILTER, NULL, 0). +Filter is a null-terminated string with ipv6 or ipv4 CIDR. + +[horizontal] +Option value type:: binary data +Option value unit:: N/A +Default value:: no filters (allow from all) +Applicable socket types:: all listening sockets, when using TCP transports. + + +RETURN VALUE +------------ +The _zmq_setsockopt()_ function shall return zero if successful. Otherwise it +shall return `-1` and set 'errno' to one of the values defined below. + +ERRORS +------ +*EINVAL*:: +The requested option _option_name_ is unknown, or the requested _option_len_ or +_option_value_ is invalid. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. +*EINTR*:: +The operation was interrupted by delivery of a signal. + + +EXAMPLE +------- +.Subscribing to messages on a 'ZMQ_SUB' socket +---- +/* Subscribe to all messages */ +rc = zmq_setsockopt (socket, ZMQ_SUBSCRIBE, "", 0); +assert (rc == 0); +/* Subscribe to messages prefixed with "ANIMALS.CATS" */ +rc = zmq_setsockopt (socket, ZMQ_SUBSCRIBE, "ANIMALS.CATS", 12); +---- + +.Setting I/O thread affinity +---- +int64_t affinity; +/* Incoming connections on TCP port 5555 shall be handled by I/O thread 1 */ +affinity = 1; +rc = zmq_setsockopt (socket, ZMQ_AFFINITY, &affinity, sizeof affinity); +assert (rc); +rc = zmq_bind (socket, "tcp://lo:5555"); +assert (rc); +/* Incoming connections on TCP port 5556 shall be handled by I/O thread 2 */ +affinity = 2; +rc = zmq_setsockopt (socket, ZMQ_AFFINITY, &affinity, sizeof affinity); +assert (rc); +rc = zmq_bind (socket, "tcp://lo:5556"); +assert (rc); +---- + + +SEE ALSO +-------- +linkzmq:zmq_getsockopt[3] +linkzmq:zmq_socket[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_socket.3 b/doc/zmq_socket.3 new file mode 100644 index 0000000..2ac20e5 --- /dev/null +++ b/doc/zmq_socket.3 @@ -0,0 +1,918 @@ +'\" t +.\" Title: zmq_socket +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_SOCKET" "3" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_socket \- create 0MQ socket +.SH "SYNOPSIS" +.sp +\fBvoid *zmq_socket (void \fR\fB\fI*context\fR\fR\fB, int \fR\fB\fItype\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_socket()\fR function shall create a 0MQ socket within the specified \fIcontext\fR and return an opaque handle to the newly created socket\&. The \fItype\fR argument specifies the socket type, which determines the semantics of communication over the socket\&. +.sp +The newly created socket is initially unbound, and not associated with any endpoints\&. In order to establish a message flow a socket must first be connected to at least one endpoint with \fBzmq_connect\fR(3), or at least one endpoint must be created for accepting incoming connections with \fBzmq_bind\fR(3)\&. +.PP +\fBKey differences to conventional sockets\fR. Generally speaking, conventional sockets present a +\fIsynchronous\fR +interface to either connection\-oriented reliable byte streams (SOCK_STREAM), or connection\-less unreliable datagrams (SOCK_DGRAM)\&. In comparison, 0MQ sockets present an abstraction of an asynchronous +\fImessage queue\fR, with the exact queueing semantics depending on the socket type in use\&. Where conventional sockets transfer streams of bytes or discrete datagrams, 0MQ sockets transfer discrete +\fImessages\fR\&. +.sp +0MQ sockets being \fIasynchronous\fR means that the timings of the physical connection setup and tear down, reconnect and effective delivery are transparent to the user and organized by 0MQ itself\&. Further, messages may be \fIqueued\fR in the event that a peer is unavailable to receive them\&. +.sp +Conventional sockets allow only strict one\-to\-one (two peers), many\-to\-one (many clients, one server), or in some cases one\-to\-many (multicast) relationships\&. With the exception of \fIZMQ_PAIR\fR, 0MQ sockets may be connected \fBto multiple endpoints\fR using \fIzmq_connect()\fR, while simultaneously accepting incoming connections \fBfrom multiple endpoints\fR bound to the socket using \fIzmq_bind()\fR, thus allowing many\-to\-many relationships\&. +.PP +\fBThread safety\fR. 0MQ +\fIsockets\fR +are +\fInot\fR +thread safe\&. Applications MUST NOT use a socket from multiple threads except after migrating a socket from one thread to another with a "full fence" memory barrier\&. +.PP +\fBSocket types\fR. The following sections present the socket types defined by 0MQ, grouped by the general +\fImessaging pattern\fR +which is built from related socket types\&. +.SS "Request\-reply pattern" +.sp +The request\-reply pattern is used for sending requests from a ZMQ_REQ \fIclient\fR to one or more ZMQ_REP \fIservices\fR, and receiving subsequent replies to each request sent\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBZMQ_REQ\fR +.RS 4 +.sp +A socket of type \fIZMQ_REQ\fR is used by a \fIclient\fR to send requests to and receive replies from a \fIservice\fR\&. This socket type allows only an alternating sequence of \fIzmq_send(request)\fR and subsequent \fIzmq_recv(reply)\fR calls\&. Each request sent is round\-robined among all \fIservices\fR, and each reply received is matched with the last issued request\&. +.sp +When a \fIZMQ_REQ\fR socket enters the \fImute\fR state due to having reached the high water mark for all \fIservices\fR, or if there are no \fIservices\fR at all, then any \fBzmq_send\fR(3) operations on the socket shall block until the \fImute\fR state ends or at least one \fIservice\fR becomes available for sending; messages are not discarded\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.B Table\ \&1.\ \&Summary of ZMQ_REQ characteristics +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Compatible peer sockets +T}:T{ +.sp +\fIZMQ_REP\fR, \fIZMQ_ROUTER\fR +T} +T{ +.sp +Direction +T}:T{ +.sp +Bidirectional +T} +T{ +.sp +Send/receive pattern +T}:T{ +.sp +Send, Receive, Send, Receive, \&... +T} +T{ +.sp +Outgoing routing strategy +T}:T{ +.sp +Round\-robin +T} +T{ +.sp +Incoming routing strategy +T}:T{ +.sp +Last peer +T} +T{ +.sp +Action in mute state +T}:T{ +.sp +Block +T} +.TE +.sp 1 +.RE +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBZMQ_REP\fR +.RS 4 +.sp +A socket of type \fIZMQ_REP\fR is used by a \fIservice\fR to receive requests from and send replies to a \fIclient\fR\&. This socket type allows only an alternating sequence of \fIzmq_recv(request)\fR and subsequent \fIzmq_send(reply)\fR calls\&. Each request received is fair\-queued from among all \fIclients\fR, and each reply sent is routed to the \fIclient\fR that issued the last request\&. If the original requester doesn\(cqt exist any more the reply is silently discarded\&. +.sp +When a \fIZMQ_REP\fR socket enters the \fImute\fR state due to having reached the high water mark for a \fIclient\fR, then any replies sent to the \fIclient\fR in question shall be dropped until the mute state ends\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.B Table\ \&2.\ \&Summary of ZMQ_REP characteristics +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Compatible peer sockets +T}:T{ +.sp +\fIZMQ_REQ\fR, \fIZMQ_DEALER\fR +T} +T{ +.sp +Direction +T}:T{ +.sp +Bidirectional +T} +T{ +.sp +Send/receive pattern +T}:T{ +.sp +Receive, Send, Receive, Send, \&... +T} +T{ +.sp +Incoming routing strategy +T}:T{ +.sp +Fair\-queued +T} +T{ +.sp +Outgoing routing strategy +T}:T{ +.sp +Last peer +T} +T{ +.sp +Action in mute state +T}:T{ +.sp +Drop +T} +.TE +.sp 1 +.RE +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBZMQ_DEALER\fR +.RS 4 +.sp +A socket of type \fIZMQ_DEALER\fR is an advanced pattern used for extending request/reply sockets\&. Each message sent is round\-robined among all connected peers, and each message received is fair\-queued from all connected peers\&. +.sp +When a \fIZMQ_DEALER\fR socket enters the \fImute\fR state due to having reached the high water mark for all peers, or if there are no peers at all, then any \fBzmq_send\fR(3) operations on the socket shall block until the mute state ends or at least one peer becomes available for sending; messages are not discarded\&. +.sp +When a \fIZMQ_DEALER\fR socket is connected to a \fIZMQ_REP\fR socket each message sent must consist of an empty message part, the \fIdelimiter\fR, followed by one or more \fIbody parts\fR\&. +.sp +Deprecated alias: \fIZMQ_XREQ\fR\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.B Table\ \&3.\ \&Summary of ZMQ_DEALER characteristics +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Compatible peer sockets +T}:T{ +.sp +\fIZMQ_ROUTER\fR, \fIZMQ_REP\fR, \fIZMQ_DEALER\fR +T} +T{ +.sp +Direction +T}:T{ +.sp +Bidirectional +T} +T{ +.sp +Send/receive pattern +T}:T{ +.sp +Unrestricted +T} +T{ +.sp +Outgoing routing strategy +T}:T{ +.sp +Round\-robin +T} +T{ +.sp +Incoming routing strategy +T}:T{ +.sp +Fair\-queued +T} +T{ +.sp +Action in mute state +T}:T{ +.sp +Block +T} +.TE +.sp 1 +.RE +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBZMQ_ROUTER\fR +.RS 4 +.sp +A socket of type \fIZMQ_ROUTER\fR is an advanced socket type used for extending request/reply sockets\&. When receiving messages a \fIZMQ_ROUTER\fR socket shall prepend a message part containing the \fIidentity\fR of the originating peer to the message before passing it to the application\&. Messages received are fair\-queued from among all connected peers\&. When sending messages a \fIZMQ_ROUTER\fR socket shall remove the first part of the message and use it to determine the \fIidentity\fR of the peer the message shall be routed to\&. If the peer does not exist anymore the message shall be silently discarded by default, unless \fIZMQ_ROUTER_BEHAVIOR\fR socket option is set to \fI1\fR\&. +.sp +When a \fIZMQ_ROUTER\fR socket enters the \fImute\fR state due to having reached the high water mark for all peers, then any messages sent to the socket shall be dropped until the mute state ends\&. Likewise, any messages routed to a peer for which the individual high water mark has been reached shall also be dropped\&. +.sp +When a \fIZMQ_REQ\fR socket is connected to a \fIZMQ_ROUTER\fR socket, in addition to the \fIidentity\fR of the originating peer each message received shall contain an empty \fIdelimiter\fR message part\&. Hence, the entire structure of each received message as seen by the application becomes: one or more \fIidentity\fR parts, \fIdelimiter\fR part, one or more \fIbody parts\fR\&. When sending replies to a \fIZMQ_REQ\fR socket the application must include the \fIdelimiter\fR part\&. +.sp +Deprecated alias: \fIZMQ_XREP\fR\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.B Table\ \&4.\ \&Summary of ZMQ_ROUTER characteristics +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Compatible peer sockets +T}:T{ +.sp +\fIZMQ_DEALER\fR, \fIZMQ_REQ\fR, \fIZMQ_ROUTER\fR +T} +T{ +.sp +Direction +T}:T{ +.sp +Bidirectional +T} +T{ +.sp +Send/receive pattern +T}:T{ +.sp +Unrestricted +T} +T{ +.sp +Outgoing routing strategy +T}:T{ +.sp +See text +T} +T{ +.sp +Incoming routing strategy +T}:T{ +.sp +Fair\-queued +T} +T{ +.sp +Action in mute state +T}:T{ +.sp +Drop +T} +.TE +.sp 1 +.RE +.SS "Publish\-subscribe pattern" +.sp +The publish\-subscribe pattern is used for one\-to\-many distribution of data from a single \fIpublisher\fR to multiple \fIsubscribers\fR in a fan out fashion\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBZMQ_PUB\fR +.RS 4 +.sp +A socket of type \fIZMQ_PUB\fR is used by a \fIpublisher\fR to distribute data\&. Messages sent are distributed in a fan out fashion to all connected peers\&. The \fBzmq_recv\fR(3) function is not implemented for this socket type\&. +.sp +When a \fIZMQ_PUB\fR socket enters the \fImute\fR state due to having reached the high water mark for a \fIsubscriber\fR, then any messages that would be sent to the \fIsubscriber\fR in question shall instead be dropped until the mute state ends\&. The \fIzmq_send()\fR function shall never block for this socket type\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.B Table\ \&5.\ \&Summary of ZMQ_PUB characteristics +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Compatible peer sockets +T}:T{ +.sp +\fIZMQ_SUB\fR, \fIZMQ_XSUB\fR +T} +T{ +.sp +Direction +T}:T{ +.sp +Unidirectional +T} +T{ +.sp +Send/receive pattern +T}:T{ +.sp +Send only +T} +T{ +.sp +Incoming routing strategy +T}:T{ +.sp +N/A +T} +T{ +.sp +Outgoing routing strategy +T}:T{ +.sp +Fan out +T} +T{ +.sp +Action in mute state +T}:T{ +.sp +Drop +T} +.TE +.sp 1 +.RE +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBZMQ_SUB\fR +.RS 4 +.sp +A socket of type \fIZMQ_SUB\fR is used by a \fIsubscriber\fR to subscribe to data distributed by a \fIpublisher\fR\&. Initially a \fIZMQ_SUB\fR socket is not subscribed to any messages, use the \fIZMQ_SUBSCRIBE\fR option of \fBzmq_setsockopt\fR(3) to specify which messages to subscribe to\&. The \fIzmq_send()\fR function is not implemented for this socket type\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.B Table\ \&6.\ \&Summary of ZMQ_SUB characteristics +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Compatible peer sockets +T}:T{ +.sp +\fIZMQ_PUB\fR, \fIZMQ_XPUB\fR +T} +T{ +.sp +Direction +T}:T{ +.sp +Unidirectional +T} +T{ +.sp +Send/receive pattern +T}:T{ +.sp +Receive only +T} +T{ +.sp +Incoming routing strategy +T}:T{ +.sp +Fair\-queued +T} +T{ +.sp +Outgoing routing strategy +T}:T{ +.sp +N/A +T} +T{ +.sp +Action in mute state +T}:T{ +.sp +Drop +T} +.TE +.sp 1 +.RE +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBZMQ_XPUB\fR +.RS 4 +.sp +Same as ZMQ_PUB except that you can receive subscriptions from the peers in form of incoming messages\&. Subscription message is a byte 1 (for subscriptions) or byte 0 (for unsubscriptions) followed by the subscription body\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.B Table\ \&7.\ \&Summary of ZMQ_XPUB characteristics +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Compatible peer sockets +T}:T{ +.sp +\fIZMQ_SUB\fR, \fIZMQ_XSUB\fR +T} +T{ +.sp +Direction +T}:T{ +.sp +Unidirectional +T} +T{ +.sp +Send/receive pattern +T}:T{ +.sp +Send messages, receive subscriptions +T} +T{ +.sp +Incoming routing strategy +T}:T{ +.sp +N/A +T} +T{ +.sp +Outgoing routing strategy +T}:T{ +.sp +Fan out +T} +T{ +.sp +Action in mute state +T}:T{ +.sp +Drop +T} +.TE +.sp 1 +.RE +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBZMQ_XSUB\fR +.RS 4 +.sp +Same as ZMQ_SUB except that you subscribe by sending subscription messages to the socket\&. Subscription message is a byte 1 (for subscriptions) or byte 0 (for unsubscriptions) followed by the subscription body\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.B Table\ \&8.\ \&Summary of ZMQ_XSUB characteristics +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Compatible peer sockets +T}:T{ +.sp +\fIZMQ_PUB\fR, \fIZMQ_XPUB\fR +T} +T{ +.sp +Direction +T}:T{ +.sp +Unidirectional +T} +T{ +.sp +Send/receive pattern +T}:T{ +.sp +Receive messages, send subscriptions +T} +T{ +.sp +Incoming routing strategy +T}:T{ +.sp +Fair\-queued +T} +T{ +.sp +Outgoing routing strategy +T}:T{ +.sp +N/A +T} +T{ +.sp +Action in mute state +T}:T{ +.sp +Drop +T} +.TE +.sp 1 +.RE +.SS "Pipeline pattern" +.sp +The pipeline pattern is used for distributing data to \fInodes\fR arranged in a pipeline\&. Data always flows down the pipeline, and each stage of the pipeline is connected to at least one \fInode\fR\&. When a pipeline stage is connected to multiple \fInodes\fR data is round\-robined among all connected \fInodes\fR\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBZMQ_PUSH\fR +.RS 4 +.sp +A socket of type \fIZMQ_PUSH\fR is used by a pipeline \fInode\fR to send messages to downstream pipeline \fInodes\fR\&. Messages are round\-robined to all connected downstream \fInodes\fR\&. The \fIzmq_recv()\fR function is not implemented for this socket type\&. +.sp +When a \fIZMQ_PUSH\fR socket enters the \fImute\fR state due to having reached the high water mark for all downstream \fInodes\fR, or if there are no downstream \fInodes\fR at all, then any \fBzmq_send\fR(3) operations on the socket shall block until the mute state ends or at least one downstream \fInode\fR becomes available for sending; messages are not discarded\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.B Table\ \&9.\ \&Summary of ZMQ_PUSH characteristics +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Compatible peer sockets +T}:T{ +.sp +\fIZMQ_PULL\fR +T} +T{ +.sp +Direction +T}:T{ +.sp +Unidirectional +T} +T{ +.sp +Send/receive pattern +T}:T{ +.sp +Send only +T} +T{ +.sp +Incoming routing strategy +T}:T{ +.sp +N/A +T} +T{ +.sp +Outgoing routing strategy +T}:T{ +.sp +Round\-robin +T} +T{ +.sp +Action in mute state +T}:T{ +.sp +Block +T} +.TE +.sp 1 +.RE +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBZMQ_PULL\fR +.RS 4 +.sp +A socket of type \fIZMQ_PULL\fR is used by a pipeline \fInode\fR to receive messages from upstream pipeline \fInodes\fR\&. Messages are fair\-queued from among all connected upstream \fInodes\fR\&. The \fIzmq_send()\fR function is not implemented for this socket type\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.B Table\ \&10.\ \&Summary of ZMQ_PULL characteristics +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Compatible peer sockets +T}:T{ +.sp +\fIZMQ_PUSH\fR +T} +T{ +.sp +Direction +T}:T{ +.sp +Unidirectional +T} +T{ +.sp +Send/receive pattern +T}:T{ +.sp +Receive only +T} +T{ +.sp +Incoming routing strategy +T}:T{ +.sp +Fair\-queued +T} +T{ +.sp +Outgoing routing strategy +T}:T{ +.sp +N/A +T} +T{ +.sp +Action in mute state +T}:T{ +.sp +Block +T} +.TE +.sp 1 +.RE +.SS "Exclusive pair pattern" +.sp +The exclusive pair pattern is used to connect a peer to precisely one other peer\&. This pattern is used for inter\-thread communication across the inproc transport\&. +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBZMQ_PAIR\fR +.RS 4 +.sp +A socket of type \fIZMQ_PAIR\fR can only be connected to a single peer at any one time\&. No message routing or filtering is performed on messages sent over a \fIZMQ_PAIR\fR socket\&. +.sp +When a \fIZMQ_PAIR\fR socket enters the \fImute\fR state due to having reached the high water mark for the connected peer, or if no peer is connected, then any \fBzmq_send\fR(3) operations on the socket shall block until the peer becomes available for sending; messages are not discarded\&. +.if n \{\ +.sp +.\} +.RS 4 +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.ps +1 +\fBNote\fR +.ps -1 +.br +.sp +\fIZMQ_PAIR\fR sockets are designed for inter\-thread communication across the \fBzmq_inproc\fR(7) transport and do not implement functionality such as auto\-reconnection\&. \fIZMQ_PAIR\fR sockets are considered experimental and may have other missing or broken aspects\&. +.sp .5v +.RE +.sp +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.br +.B Table\ \&11.\ \&Summary of ZMQ_PAIR characteristics +.TS +tab(:); +lt lt +lt lt +lt lt +lt lt +lt lt +lt lt. +T{ +.sp +Compatible peer sockets +T}:T{ +.sp +\fIZMQ_PAIR\fR +T} +T{ +.sp +Direction +T}:T{ +.sp +Bidirectional +T} +T{ +.sp +Send/receive pattern +T}:T{ +.sp +Unrestricted +T} +T{ +.sp +Incoming routing strategy +T}:T{ +.sp +N/A +T} +T{ +.sp +Outgoing routing strategy +T}:T{ +.sp +N/A +T} +T{ +.sp +Action in mute state +T}:T{ +.sp +Block +T} +.TE +.sp 1 +.RE +.SH "RETURN VALUE" +.sp +The \fIzmq_socket()\fR function shall return an opaque handle to the newly created socket if successful\&. Otherwise, it shall return NULL and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +The requested socket +\fItype\fR +is invalid\&. +.RE +.PP +\fBEFAULT\fR +.RS 4 +The provided +\fIcontext\fR +is invalid\&. +.RE +.PP +\fBEMFILE\fR +.RS 4 +The limit on the total number of open 0MQ sockets has been reached\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The context specified was terminated\&. +.RE +.SH "SEE ALSO" +.sp +\fBzmq_init\fR(3) \fBzmq_setsockopt\fR(3) \fBzmq_bind\fR(3) \fBzmq_connect\fR(3) \fBzmq_send\fR(3) \fBzmq_recv\fR(3) \fBzmq_inproc\fR(7) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>, and Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE +.IP " 3." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE diff --git a/doc/zmq_socket.html b/doc/zmq_socket.html new file mode 100644 index 0000000..fc130f4 --- /dev/null +++ b/doc/zmq_socket.html @@ -0,0 +1,1773 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_socket(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_socket -
+ create 0MQ socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>void *zmq_socket (void <em>*context</em>, int <em>type</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_socket()</em> function shall create a ØMQ socket within the specified
+<em>context</em> and return an opaque handle to the newly created socket. The <em>type</em>
+argument specifies the socket type, which determines the semantics of
+communication over the socket.</p></div>
+<div class="paragraph"><p>The newly created socket is initially unbound, and not associated with any
+endpoints. In order to establish a message flow a socket must first be
+connected to at least one endpoint with <a href="zmq_connect.html">zmq_connect(3)</a>, or at least one
+endpoint must be created for accepting incoming connections with
+<a href="zmq_bind.html">zmq_bind(3)</a>.</p></div>
+<div class="paragraph"><div class="title">Key differences to conventional sockets</div><p>Generally speaking, conventional sockets present a <em>synchronous</em> interface to
+either connection-oriented reliable byte streams (SOCK_STREAM), or
+connection-less unreliable datagrams (SOCK_DGRAM). In comparison, ØMQ sockets
+present an abstraction of an asynchronous <em>message queue</em>, with the exact
+queueing semantics depending on the socket type in use. Where conventional
+sockets transfer streams of bytes or discrete datagrams, ØMQ sockets transfer
+discrete <em>messages</em>.</p></div>
+<div class="paragraph"><p>ØMQ sockets being <em>asynchronous</em> means that the timings of the physical
+connection setup and tear down, reconnect and effective delivery are transparent
+to the user and organized by ØMQ itself. Further, messages may be <em>queued</em> in
+the event that a peer is unavailable to receive them.</p></div>
+<div class="paragraph"><p>Conventional sockets allow only strict one-to-one (two peers), many-to-one
+(many clients, one server), or in some cases one-to-many (multicast)
+relationships. With the exception of <em>ZMQ_PAIR</em>, ØMQ sockets may be connected
+<strong>to multiple endpoints</strong> using <em>zmq_connect()</em>, while simultaneously accepting
+incoming connections <strong>from multiple endpoints</strong> bound to the socket using
+<em>zmq_bind()</em>, thus allowing many-to-many relationships.</p></div>
+<div class="paragraph"><div class="title">Thread safety</div><p>ØMQ <em>sockets</em> are <em>not</em> thread safe. Applications MUST NOT use a socket
+from multiple threads except after migrating a socket from one thread to
+another with a "full fence" memory barrier.</p></div>
+<div class="paragraph"><div class="title">Socket types</div><p>The following sections present the socket types defined by ØMQ, grouped by the
+general <em>messaging pattern</em> which is built from related socket types.</p></div>
+<div class="sect2">
+<h3 id="_request_reply_pattern">Request-reply pattern</h3>
+<div class="paragraph"><p>The request-reply pattern is used for sending requests from a ZMQ_REQ <em>client</em>
+to one or more ZMQ_REP <em>services</em>, and receiving subsequent replies to each
+request sent.</p></div>
+<div class="sect3">
+<h4 id="_zmq_req">ZMQ_REQ</h4>
+<div class="paragraph"><p>A socket of type <em>ZMQ_REQ</em> is used by a <em>client</em> to send requests to and
+receive replies from a <em>service</em>. This socket type allows only an alternating
+sequence of <em>zmq_send(request)</em> and subsequent <em>zmq_recv(reply)</em> calls. Each
+request sent is round-robined among all <em>services</em>, and each reply received is
+matched with the last issued request.</p></div>
+<div class="paragraph"><p>When a <em>ZMQ_REQ</em> socket enters the <em>mute</em> state due to having reached the
+high water mark for all <em>services</em>, or if there are no <em>services</em> at all, then
+any <a href="zmq_send.html">zmq_send(3)</a> operations on the socket shall block until the
+<em>mute</em> state ends or at least one <em>service</em> becomes available for sending;
+messages are not discarded.</p></div>
+<div class="hdlist"><div class="title">Summary of ZMQ_REQ characteristics</div><table>
+<tr>
+<td class="hdlist1">
+Compatible peer sockets
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+<em>ZMQ_REP</em>, <em>ZMQ_ROUTER</em>
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Direction
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Bidirectional
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Send/receive pattern
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Send, Receive, Send, Receive, …
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Outgoing routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Round-robin
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Incoming routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Last peer
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Action in mute state
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Block
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect3">
+<h4 id="_zmq_rep">ZMQ_REP</h4>
+<div class="paragraph"><p>A socket of type <em>ZMQ_REP</em> is used by a <em>service</em> to receive requests from and
+send replies to a <em>client</em>. This socket type allows only an alternating
+sequence of <em>zmq_recv(request)</em> and subsequent <em>zmq_send(reply)</em> calls. Each
+request received is fair-queued from among all <em>clients</em>, and each reply sent
+is routed to the <em>client</em> that issued the last request. If the original
+requester doesn’t exist any more the reply is silently discarded.</p></div>
+<div class="paragraph"><p>When a <em>ZMQ_REP</em> socket enters the <em>mute</em> state due to having reached the
+high water mark for a <em>client</em>, then any replies sent to the <em>client</em> in
+question shall be dropped until the mute state ends.</p></div>
+<div class="hdlist"><div class="title">Summary of ZMQ_REP characteristics</div><table>
+<tr>
+<td class="hdlist1">
+Compatible peer sockets
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+<em>ZMQ_REQ</em>, <em>ZMQ_DEALER</em>
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Direction
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Bidirectional
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Send/receive pattern
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Receive, Send, Receive, Send, …
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Incoming routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Fair-queued
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Outgoing routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Last peer
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Action in mute state
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Drop
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect3">
+<h4 id="_zmq_dealer">ZMQ_DEALER</h4>
+<div class="paragraph"><p>A socket of type <em>ZMQ_DEALER</em> is an advanced pattern used for extending
+request/reply sockets. Each message sent is round-robined among all connected
+peers, and each message received is fair-queued from all connected peers.</p></div>
+<div class="paragraph"><p>When a <em>ZMQ_DEALER</em> socket enters the <em>mute</em> state due to having reached the
+high water mark for all peers, or if there are no peers at all, then any
+<a href="zmq_send.html">zmq_send(3)</a> operations on the socket shall block until the mute
+state ends or at least one peer becomes available for sending; messages are not
+discarded.</p></div>
+<div class="paragraph"><p>When a <em>ZMQ_DEALER</em> socket is connected to a <em>ZMQ_REP</em> socket each message sent
+must consist of an empty message part, the <em>delimiter</em>, followed by one or more
+<em>body parts</em>.</p></div>
+<div class="paragraph"><p>Deprecated alias: <em>ZMQ_XREQ</em>.</p></div>
+<div class="hdlist"><div class="title">Summary of ZMQ_DEALER characteristics</div><table>
+<tr>
+<td class="hdlist1">
+Compatible peer sockets
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+<em>ZMQ_ROUTER</em>, <em>ZMQ_REP</em>, <em>ZMQ_DEALER</em>
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Direction
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Bidirectional
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Send/receive pattern
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Unrestricted
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Outgoing routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Round-robin
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Incoming routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Fair-queued
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Action in mute state
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Block
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect3">
+<h4 id="_zmq_router">ZMQ_ROUTER</h4>
+<div class="paragraph"><p>A socket of type <em>ZMQ_ROUTER</em> is an advanced socket type used for extending
+request/reply sockets. When receiving messages a <em>ZMQ_ROUTER</em> socket shall
+prepend a message part containing the <em>identity</em> of the originating peer to the
+message before passing it to the application. Messages received are fair-queued
+from among all connected peers. When sending messages a <em>ZMQ_ROUTER</em> socket shall
+remove the first part of the message and use it to determine the <em>identity</em> of
+the peer the message shall be routed to. If the peer does not exist anymore
+the message shall be silently discarded by default, unless <em>ZMQ_ROUTER_BEHAVIOR</em>
+socket option is set to <em>1</em>.</p></div>
+<div class="paragraph"><p>When a <em>ZMQ_ROUTER</em> socket enters the <em>mute</em> state due to having reached the
+high water mark for all peers, then any messages sent to the socket shall be dropped
+until the mute state ends. Likewise, any messages routed to a peer for which
+the individual high water mark has been reached shall also be dropped.</p></div>
+<div class="paragraph"><p>When a <em>ZMQ_REQ</em> socket is connected to a <em>ZMQ_ROUTER</em> socket, in addition to the
+<em>identity</em> of the originating peer each message received shall contain an empty
+<em>delimiter</em> message part. Hence, the entire structure of each received message
+as seen by the application becomes: one or more <em>identity</em> parts, <em>delimiter</em>
+part, one or more <em>body parts</em>. When sending replies to a <em>ZMQ_REQ</em> socket the
+application must include the <em>delimiter</em> part.</p></div>
+<div class="paragraph"><p>Deprecated alias: <em>ZMQ_XREP</em>.</p></div>
+<div class="hdlist"><div class="title">Summary of ZMQ_ROUTER characteristics</div><table>
+<tr>
+<td class="hdlist1">
+Compatible peer sockets
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+<em>ZMQ_DEALER</em>, <em>ZMQ_REQ</em>, <em>ZMQ_ROUTER</em>
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Direction
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Bidirectional
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Send/receive pattern
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Unrestricted
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Outgoing routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+See text
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Incoming routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Fair-queued
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Action in mute state
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Drop
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_publish_subscribe_pattern">Publish-subscribe pattern</h3>
+<div class="paragraph"><p>The publish-subscribe pattern is used for one-to-many distribution of data from
+a single <em>publisher</em> to multiple <em>subscribers</em> in a fan out fashion.</p></div>
+<div class="sect3">
+<h4 id="_zmq_pub">ZMQ_PUB</h4>
+<div class="paragraph"><p>A socket of type <em>ZMQ_PUB</em> is used by a <em>publisher</em> to distribute data.
+Messages sent are distributed in a fan out fashion to all connected peers.
+The <a href="zmq_recv.html">zmq_recv(3)</a> function is not implemented for this socket type.</p></div>
+<div class="paragraph"><p>When a <em>ZMQ_PUB</em> socket enters the <em>mute</em> state due to having reached the
+high water mark for a <em>subscriber</em>, then any messages that would be sent to the
+<em>subscriber</em> in question shall instead be dropped until the mute state
+ends. The <em>zmq_send()</em> function shall never block for this socket type.</p></div>
+<div class="hdlist"><div class="title">Summary of ZMQ_PUB characteristics</div><table>
+<tr>
+<td class="hdlist1">
+Compatible peer sockets
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+<em>ZMQ_SUB</em>, <em>ZMQ_XSUB</em>
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Direction
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Unidirectional
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Send/receive pattern
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Send only
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Incoming routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Outgoing routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Fan out
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Action in mute state
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Drop
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect3">
+<h4 id="_zmq_sub">ZMQ_SUB</h4>
+<div class="paragraph"><p>A socket of type <em>ZMQ_SUB</em> is used by a <em>subscriber</em> to subscribe to data
+distributed by a <em>publisher</em>. Initially a <em>ZMQ_SUB</em> socket is not subscribed to
+any messages, use the <em>ZMQ_SUBSCRIBE</em> option of <a href="zmq_setsockopt.html">zmq_setsockopt(3)</a> to
+specify which messages to subscribe to. The <em>zmq_send()</em> function is not
+implemented for this socket type.</p></div>
+<div class="hdlist"><div class="title">Summary of ZMQ_SUB characteristics</div><table>
+<tr>
+<td class="hdlist1">
+Compatible peer sockets
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+<em>ZMQ_PUB</em>, <em>ZMQ_XPUB</em>
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Direction
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Unidirectional
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Send/receive pattern
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Receive only
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Incoming routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Fair-queued
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Outgoing routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Action in mute state
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Drop
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect3">
+<h4 id="_zmq_xpub">ZMQ_XPUB</h4>
+<div class="paragraph"><p>Same as ZMQ_PUB except that you can receive subscriptions from the peers
+in form of incoming messages. Subscription message is a byte 1 (for
+subscriptions) or byte 0 (for unsubscriptions) followed by the subscription
+body.</p></div>
+<div class="hdlist"><div class="title">Summary of ZMQ_XPUB characteristics</div><table>
+<tr>
+<td class="hdlist1">
+Compatible peer sockets
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+<em>ZMQ_SUB</em>, <em>ZMQ_XSUB</em>
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Direction
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Unidirectional
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Send/receive pattern
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Send messages, receive subscriptions
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Incoming routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Outgoing routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Fan out
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Action in mute state
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Drop
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect3">
+<h4 id="_zmq_xsub">ZMQ_XSUB</h4>
+<div class="paragraph"><p>Same as ZMQ_SUB except that you subscribe by sending subscription messages to
+the socket. Subscription message is a byte 1 (for subscriptions) or byte 0
+(for unsubscriptions) followed by the subscription body.</p></div>
+<div class="hdlist"><div class="title">Summary of ZMQ_XSUB characteristics</div><table>
+<tr>
+<td class="hdlist1">
+Compatible peer sockets
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+<em>ZMQ_PUB</em>, <em>ZMQ_XPUB</em>
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Direction
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Unidirectional
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Send/receive pattern
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Receive messages, send subscriptions
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Incoming routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Fair-queued
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Outgoing routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Action in mute state
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Drop
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_pipeline_pattern">Pipeline pattern</h3>
+<div class="paragraph"><p>The pipeline pattern is used for distributing data to <em>nodes</em> arranged in
+a pipeline. Data always flows down the pipeline, and each stage of the pipeline
+is connected to at least one <em>node</em>. When a pipeline stage is connected to
+multiple <em>nodes</em> data is round-robined among all connected <em>nodes</em>.</p></div>
+<div class="sect3">
+<h4 id="_zmq_push">ZMQ_PUSH</h4>
+<div class="paragraph"><p>A socket of type <em>ZMQ_PUSH</em> is used by a pipeline <em>node</em> to send messages
+to downstream pipeline <em>nodes</em>. Messages are round-robined to all connected
+downstream <em>nodes</em>. The <em>zmq_recv()</em> function is not implemented for this
+socket type.</p></div>
+<div class="paragraph"><p>When a <em>ZMQ_PUSH</em> socket enters the <em>mute</em> state due to having reached the
+high water mark for all downstream <em>nodes</em>, or if there are no downstream
+<em>nodes</em> at all, then any <a href="zmq_send.html">zmq_send(3)</a> operations on the socket shall
+block until the mute state ends or at least one downstream <em>node</em>
+becomes available for sending; messages are not discarded.</p></div>
+<div class="hdlist"><div class="title">Summary of ZMQ_PUSH characteristics</div><table>
+<tr>
+<td class="hdlist1">
+Compatible peer sockets
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+<em>ZMQ_PULL</em>
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Direction
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Unidirectional
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Send/receive pattern
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Send only
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Incoming routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Outgoing routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Round-robin
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Action in mute state
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Block
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect3">
+<h4 id="_zmq_pull">ZMQ_PULL</h4>
+<div class="paragraph"><p>A socket of type <em>ZMQ_PULL</em> is used by a pipeline <em>node</em> to receive messages
+from upstream pipeline <em>nodes</em>. Messages are fair-queued from among all
+connected upstream <em>nodes</em>. The <em>zmq_send()</em> function is not implemented for
+this socket type.</p></div>
+<div class="hdlist"><div class="title">Summary of ZMQ_PULL characteristics</div><table>
+<tr>
+<td class="hdlist1">
+Compatible peer sockets
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+<em>ZMQ_PUSH</em>
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Direction
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Unidirectional
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Send/receive pattern
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Receive only
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Incoming routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Fair-queued
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Outgoing routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Action in mute state
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Block
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_exclusive_pair_pattern">Exclusive pair pattern</h3>
+<div class="paragraph"><p>The exclusive pair pattern is used to connect a peer to precisely one other
+peer. This pattern is used for inter-thread communication across the inproc
+transport.</p></div>
+<div class="sect3">
+<h4 id="_zmq_pair">ZMQ_PAIR</h4>
+<div class="paragraph"><p>A socket of type <em>ZMQ_PAIR</em> can only be connected to a single peer at any one
+time. No message routing or filtering is performed on messages sent over a
+<em>ZMQ_PAIR</em> socket.</p></div>
+<div class="paragraph"><p>When a <em>ZMQ_PAIR</em> socket enters the <em>mute</em> state due to having reached the
+high water mark for the connected peer, or if no peer is connected, then
+any <a href="zmq_send.html">zmq_send(3)</a> operations on the socket shall block until the peer
+becomes available for sending; messages are not discarded.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content"><em>ZMQ_PAIR</em> sockets are designed for inter-thread communication across
+the <a href="zmq_inproc.html">zmq_inproc(7)</a> transport and do not implement functionality such
+as auto-reconnection. <em>ZMQ_PAIR</em> sockets are considered experimental and may
+have other missing or broken aspects.</td>
+</tr></table>
+</div>
+<div class="hdlist"><div class="title">Summary of ZMQ_PAIR characteristics</div><table>
+<tr>
+<td class="hdlist1">
+Compatible peer sockets
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+<em>ZMQ_PAIR</em>
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Direction
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Bidirectional
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Send/receive pattern
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Unrestricted
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Incoming routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Outgoing routing strategy
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+N/A
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Action in mute state
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+Block
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_socket()</em> function shall return an opaque handle to the newly created
+socket if successful. Otherwise, it shall return NULL and set <em>errno</em> to one of
+the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The requested socket <em>type</em> is invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EFAULT</strong>
+</dt>
+<dd>
+<p>
+The provided <em>context</em> is invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EMFILE</strong>
+</dt>
+<dd>
+<p>
+The limit on the total number of open ØMQ sockets has been reached.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The context specified was terminated.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_init.html">zmq_init(3)</a>
+<a href="zmq_setsockopt.html">zmq_setsockopt(3)</a>
+<a href="zmq_bind.html">zmq_bind(3)</a>
+<a href="zmq_connect.html">zmq_connect(3)</a>
+<a href="zmq_send.html">zmq_send(3)</a>
+<a href="zmq_recv.html">zmq_recv(3)</a>
+<a href="zmq_inproc.html">zmq_inproc(7)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>>,
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>, and Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>.</p></div>
+</div>
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+ØMQ 3.2.2<br />
+Last updated 2012-11-14 10:09:14 KST
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diff --git a/doc/zmq_socket.txt b/doc/zmq_socket.txt new file mode 100644 index 0000000..9a43587 --- /dev/null +++ b/doc/zmq_socket.txt @@ -0,0 +1,369 @@ +zmq_socket(3) +============= + + +NAME +---- +zmq_socket - create 0MQ socket + + +SYNOPSIS +-------- +*void *zmq_socket (void '*context', int 'type');* + + +DESCRIPTION +----------- +The 'zmq_socket()' function shall create a 0MQ socket within the specified +'context' and return an opaque handle to the newly created socket. The 'type' +argument specifies the socket type, which determines the semantics of +communication over the socket. + +The newly created socket is initially unbound, and not associated with any +endpoints. In order to establish a message flow a socket must first be +connected to at least one endpoint with linkzmq:zmq_connect[3], or at least one +endpoint must be created for accepting incoming connections with +linkzmq:zmq_bind[3]. + +.Key differences to conventional sockets +Generally speaking, conventional sockets present a _synchronous_ interface to +either connection-oriented reliable byte streams (SOCK_STREAM), or +connection-less unreliable datagrams (SOCK_DGRAM). In comparison, 0MQ sockets +present an abstraction of an asynchronous _message queue_, with the exact +queueing semantics depending on the socket type in use. Where conventional +sockets transfer streams of bytes or discrete datagrams, 0MQ sockets transfer +discrete _messages_. + +0MQ sockets being _asynchronous_ means that the timings of the physical +connection setup and tear down, reconnect and effective delivery are transparent +to the user and organized by 0MQ itself. Further, messages may be _queued_ in +the event that a peer is unavailable to receive them. + +Conventional sockets allow only strict one-to-one (two peers), many-to-one +(many clients, one server), or in some cases one-to-many (multicast) +relationships. With the exception of 'ZMQ_PAIR', 0MQ sockets may be connected +*to multiple endpoints* using _zmq_connect()_, while simultaneously accepting +incoming connections *from multiple endpoints* bound to the socket using +_zmq_bind()_, thus allowing many-to-many relationships. + +.Thread safety +0MQ 'sockets' are _not_ thread safe. Applications MUST NOT use a socket +from multiple threads except after migrating a socket from one thread to +another with a "full fence" memory barrier. + +.Socket types +The following sections present the socket types defined by 0MQ, grouped by the +general _messaging pattern_ which is built from related socket types. + + +Request-reply pattern +~~~~~~~~~~~~~~~~~~~~~ +The request-reply pattern is used for sending requests from a ZMQ_REQ _client_ +to one or more ZMQ_REP _services_, and receiving subsequent replies to each +request sent. + + +ZMQ_REQ +^^^^^^^ +A socket of type 'ZMQ_REQ' is used by a _client_ to send requests to and +receive replies from a _service_. This socket type allows only an alternating +sequence of _zmq_send(request)_ and subsequent _zmq_recv(reply)_ calls. Each +request sent is round-robined among all _services_, and each reply received is +matched with the last issued request. + +When a 'ZMQ_REQ' socket enters the 'mute' state due to having reached the +high water mark for all _services_, or if there are no _services_ at all, then +any linkzmq:zmq_send[3] operations on the socket shall block until the +'mute' state ends or at least one _service_ becomes available for sending; +messages are not discarded. + +[horizontal] +.Summary of ZMQ_REQ characteristics +Compatible peer sockets:: 'ZMQ_REP', 'ZMQ_ROUTER' +Direction:: Bidirectional +Send/receive pattern:: Send, Receive, Send, Receive, ... +Outgoing routing strategy:: Round-robin +Incoming routing strategy:: Last peer +Action in mute state:: Block + + +ZMQ_REP +^^^^^^^ +A socket of type 'ZMQ_REP' is used by a _service_ to receive requests from and +send replies to a _client_. This socket type allows only an alternating +sequence of _zmq_recv(request)_ and subsequent _zmq_send(reply)_ calls. Each +request received is fair-queued from among all _clients_, and each reply sent +is routed to the _client_ that issued the last request. If the original +requester doesn't exist any more the reply is silently discarded. + +When a 'ZMQ_REP' socket enters the 'mute' state due to having reached the +high water mark for a _client_, then any replies sent to the _client_ in +question shall be dropped until the mute state ends. + +[horizontal] +.Summary of ZMQ_REP characteristics +Compatible peer sockets:: 'ZMQ_REQ', 'ZMQ_DEALER' +Direction:: Bidirectional +Send/receive pattern:: Receive, Send, Receive, Send, ... +Incoming routing strategy:: Fair-queued +Outgoing routing strategy:: Last peer +Action in mute state:: Drop + + +ZMQ_DEALER +^^^^^^^^^^ +A socket of type 'ZMQ_DEALER' is an advanced pattern used for extending +request/reply sockets. Each message sent is round-robined among all connected +peers, and each message received is fair-queued from all connected peers. + +When a 'ZMQ_DEALER' socket enters the 'mute' state due to having reached the +high water mark for all peers, or if there are no peers at all, then any +linkzmq:zmq_send[3] operations on the socket shall block until the mute +state ends or at least one peer becomes available for sending; messages are not +discarded. + +When a 'ZMQ_DEALER' socket is connected to a 'ZMQ_REP' socket each message sent +must consist of an empty message part, the _delimiter_, followed by one or more +_body parts_. + +Deprecated alias: 'ZMQ_XREQ'. + +[horizontal] +.Summary of ZMQ_DEALER characteristics +Compatible peer sockets:: 'ZMQ_ROUTER', 'ZMQ_REP', 'ZMQ_DEALER' +Direction:: Bidirectional +Send/receive pattern:: Unrestricted +Outgoing routing strategy:: Round-robin +Incoming routing strategy:: Fair-queued +Action in mute state:: Block + + +ZMQ_ROUTER +^^^^^^^^^^ +A socket of type 'ZMQ_ROUTER' is an advanced socket type used for extending +request/reply sockets. When receiving messages a 'ZMQ_ROUTER' socket shall +prepend a message part containing the _identity_ of the originating peer to the +message before passing it to the application. Messages received are fair-queued +from among all connected peers. When sending messages a 'ZMQ_ROUTER' socket shall +remove the first part of the message and use it to determine the _identity_ of +the peer the message shall be routed to. If the peer does not exist anymore +the message shall be silently discarded by default, unless 'ZMQ_ROUTER_BEHAVIOR' +socket option is set to '1'. + +When a 'ZMQ_ROUTER' socket enters the 'mute' state due to having reached the +high water mark for all peers, then any messages sent to the socket shall be dropped +until the mute state ends. Likewise, any messages routed to a peer for which +the individual high water mark has been reached shall also be dropped. + +When a 'ZMQ_REQ' socket is connected to a 'ZMQ_ROUTER' socket, in addition to the +_identity_ of the originating peer each message received shall contain an empty +_delimiter_ message part. Hence, the entire structure of each received message +as seen by the application becomes: one or more _identity_ parts, _delimiter_ +part, one or more _body parts_. When sending replies to a 'ZMQ_REQ' socket the +application must include the _delimiter_ part. + +Deprecated alias: 'ZMQ_XREP'. + +[horizontal] +.Summary of ZMQ_ROUTER characteristics +Compatible peer sockets:: 'ZMQ_DEALER', 'ZMQ_REQ', 'ZMQ_ROUTER' +Direction:: Bidirectional +Send/receive pattern:: Unrestricted +Outgoing routing strategy:: See text +Incoming routing strategy:: Fair-queued +Action in mute state:: Drop + + +Publish-subscribe pattern +~~~~~~~~~~~~~~~~~~~~~~~~~ +The publish-subscribe pattern is used for one-to-many distribution of data from +a single _publisher_ to multiple _subscribers_ in a fan out fashion. + + +ZMQ_PUB +^^^^^^^ +A socket of type 'ZMQ_PUB' is used by a _publisher_ to distribute data. +Messages sent are distributed in a fan out fashion to all connected peers. +The linkzmq:zmq_recv[3] function is not implemented for this socket type. + +When a 'ZMQ_PUB' socket enters the 'mute' state due to having reached the +high water mark for a _subscriber_, then any messages that would be sent to the +_subscriber_ in question shall instead be dropped until the mute state +ends. The _zmq_send()_ function shall never block for this socket type. + +[horizontal] +.Summary of ZMQ_PUB characteristics +Compatible peer sockets:: 'ZMQ_SUB', 'ZMQ_XSUB' +Direction:: Unidirectional +Send/receive pattern:: Send only +Incoming routing strategy:: N/A +Outgoing routing strategy:: Fan out +Action in mute state:: Drop + + +ZMQ_SUB +^^^^^^^ +A socket of type 'ZMQ_SUB' is used by a _subscriber_ to subscribe to data +distributed by a _publisher_. Initially a 'ZMQ_SUB' socket is not subscribed to +any messages, use the 'ZMQ_SUBSCRIBE' option of linkzmq:zmq_setsockopt[3] to +specify which messages to subscribe to. The _zmq_send()_ function is not +implemented for this socket type. + +[horizontal] +.Summary of ZMQ_SUB characteristics +Compatible peer sockets:: 'ZMQ_PUB', 'ZMQ_XPUB' +Direction:: Unidirectional +Send/receive pattern:: Receive only +Incoming routing strategy:: Fair-queued +Outgoing routing strategy:: N/A +Action in mute state:: Drop + + +ZMQ_XPUB +^^^^^^^^ +Same as ZMQ_PUB except that you can receive subscriptions from the peers +in form of incoming messages. Subscription message is a byte 1 (for +subscriptions) or byte 0 (for unsubscriptions) followed by the subscription +body. + +[horizontal] +.Summary of ZMQ_XPUB characteristics +Compatible peer sockets:: 'ZMQ_SUB', 'ZMQ_XSUB' +Direction:: Unidirectional +Send/receive pattern:: Send messages, receive subscriptions +Incoming routing strategy:: N/A +Outgoing routing strategy:: Fan out +Action in mute state:: Drop + + +ZMQ_XSUB +^^^^^^^^ +Same as ZMQ_SUB except that you subscribe by sending subscription messages to +the socket. Subscription message is a byte 1 (for subscriptions) or byte 0 +(for unsubscriptions) followed by the subscription body. + +[horizontal] +.Summary of ZMQ_XSUB characteristics +Compatible peer sockets:: 'ZMQ_PUB', 'ZMQ_XPUB' +Direction:: Unidirectional +Send/receive pattern:: Receive messages, send subscriptions +Incoming routing strategy:: Fair-queued +Outgoing routing strategy:: N/A +Action in mute state:: Drop + + +Pipeline pattern +~~~~~~~~~~~~~~~~ +The pipeline pattern is used for distributing data to _nodes_ arranged in +a pipeline. Data always flows down the pipeline, and each stage of the pipeline +is connected to at least one _node_. When a pipeline stage is connected to +multiple _nodes_ data is round-robined among all connected _nodes_. + + +ZMQ_PUSH +^^^^^^^^ +A socket of type 'ZMQ_PUSH' is used by a pipeline _node_ to send messages +to downstream pipeline _nodes_. Messages are round-robined to all connected +downstream _nodes_. The _zmq_recv()_ function is not implemented for this +socket type. + +When a 'ZMQ_PUSH' socket enters the 'mute' state due to having reached the +high water mark for all downstream _nodes_, or if there are no downstream +_nodes_ at all, then any linkzmq:zmq_send[3] operations on the socket shall +block until the mute state ends or at least one downstream _node_ +becomes available for sending; messages are not discarded. + +[horizontal] +.Summary of ZMQ_PUSH characteristics +Compatible peer sockets:: 'ZMQ_PULL' +Direction:: Unidirectional +Send/receive pattern:: Send only +Incoming routing strategy:: N/A +Outgoing routing strategy:: Round-robin +Action in mute state:: Block + + +ZMQ_PULL +^^^^^^^^ +A socket of type 'ZMQ_PULL' is used by a pipeline _node_ to receive messages +from upstream pipeline _nodes_. Messages are fair-queued from among all +connected upstream _nodes_. The _zmq_send()_ function is not implemented for +this socket type. + +[horizontal] +.Summary of ZMQ_PULL characteristics +Compatible peer sockets:: 'ZMQ_PUSH' +Direction:: Unidirectional +Send/receive pattern:: Receive only +Incoming routing strategy:: Fair-queued +Outgoing routing strategy:: N/A +Action in mute state:: Block + + +Exclusive pair pattern +~~~~~~~~~~~~~~~~~~~~~~ +The exclusive pair pattern is used to connect a peer to precisely one other +peer. This pattern is used for inter-thread communication across the inproc +transport. + + +ZMQ_PAIR +^^^^^^^^ +A socket of type 'ZMQ_PAIR' can only be connected to a single peer at any one +time. No message routing or filtering is performed on messages sent over a +'ZMQ_PAIR' socket. + +When a 'ZMQ_PAIR' socket enters the 'mute' state due to having reached the +high water mark for the connected peer, or if no peer is connected, then +any linkzmq:zmq_send[3] operations on the socket shall block until the peer +becomes available for sending; messages are not discarded. + +NOTE: 'ZMQ_PAIR' sockets are designed for inter-thread communication across +the linkzmq:zmq_inproc[7] transport and do not implement functionality such +as auto-reconnection. 'ZMQ_PAIR' sockets are considered experimental and may +have other missing or broken aspects. + +[horizontal] +.Summary of ZMQ_PAIR characteristics +Compatible peer sockets:: 'ZMQ_PAIR' +Direction:: Bidirectional +Send/receive pattern:: Unrestricted +Incoming routing strategy:: N/A +Outgoing routing strategy:: N/A +Action in mute state:: Block + + +RETURN VALUE +------------ +The _zmq_socket()_ function shall return an opaque handle to the newly created +socket if successful. Otherwise, it shall return NULL and set 'errno' to one of +the values defined below. + + +ERRORS +------ +*EINVAL*:: +The requested socket 'type' is invalid. +*EFAULT*:: +The provided 'context' is invalid. +*EMFILE*:: +The limit on the total number of open 0MQ sockets has been reached. +*ETERM*:: +The context specified was terminated. + +SEE ALSO +-------- +linkzmq:zmq_init[3] +linkzmq:zmq_setsockopt[3] +linkzmq:zmq_bind[3] +linkzmq:zmq_connect[3] +linkzmq:zmq_send[3] +linkzmq:zmq_recv[3] +linkzmq:zmq_inproc[7] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com>, +Martin Lucina <mato@kotelna.sk>, and Pieter Hintjens <ph@imatix.com>. diff --git a/doc/zmq_socket_monitor.3 b/doc/zmq_socket_monitor.3 new file mode 100644 index 0000000..a0306fa --- /dev/null +++ b/doc/zmq_socket_monitor.3 @@ -0,0 +1,380 @@ +'\" t +.\" Title: zmq_ctx_socket_monitor +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_CTX_SOCKET_MONIT" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_socket_monitor \- register a monitoring callback +.SH "SYNOPSIS" +.sp +\fBint zmq_socket_monitor (void \fR\fB\fI*socket\fR\fR\fB, char * \fR\fB\fI*addr\fR\fR\fB, int \fR\fB\fIevents\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_socket_monitor()\fR function shall spawn a \fIPAIR\fR socket that publishes socket state changes (events) over the inproc:// transport to a given endpoint\&. Messages are \fIzmq_event_t\fR structs\&. It\(cqs recommended to connect via a \fIPAIR\fR socket in another application thread and handle monitoring events there\&. It\(cqs possible to also supply a bitmask (\fIZMQ_EVENT_ALL\fR or any combination of the \fIZMQ_EVENT_*\fR constants) of the events you\(cqre interested in\&. +.sp +.if n \{\ +.RS 4 +.\} +.nf +// monitoring thread +static void *req_socket_monitor (void *ctx) +{ + zmq_event_t event; + int rc; + + void *s = zmq_socket (ctx, ZMQ_PAIR); + assert (s); + + rc = zmq_connect (s, "inproc://monitor\&.req"); + assert (rc == 0); + while (true) { + zmq_msg_t msg; + zmq_msg_init (&msg); + rc = zmq_recvmsg (s, &msg, 0); + if (rc == \-1 && zmq_errno() == ETERM) break; + assert (rc != \-1); + memcpy (&event, zmq_msg_data (&msg), sizeof (event)); + switch (event\&.event) { + case ZMQ_EVENT_CONNECTED: + // handle socket connected event + break; + case ZMQ_EVENT_CLOSED: + // handle socket closed event + break; + } + } + zmq_close (s); + return NULL; +} + +// register a monitor endpoint for all socket events +rc = zmq_socket_monitor (req, "inproc://monitor\&.req", ZMQ_EVENT_ALL); +assert (rc == 0); + +// spawn a monitoring thread +rc = pthread_create (&threads [0], NULL, req_socket_monitor, ctx); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +Only connection oriented (tcp and ipc) transports are supported in this initial implementation\&. +.sp +Supported events are: +.SS "ZMQ_EVENT_CONNECTED: connection established" +.sp +The \fIZMQ_EVENT_CONNECTED\fR event triggers when a connection has been established to a remote peer\&. This can happen either synchronous or asynchronous\&. +.PP +\fBEvent metadata:\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +data\&.connected\&.addr // peer address +data\&.connected\&.fd // socket descriptor +.fi +.if n \{\ +.RE +.\} +.sp +.SS "ZMQ_EVENT_CONNECT_DELAYED: synchronous connect failed, it\(cqs being polled" +.sp +The \fIZMQ_EVENT_CONNECT_DELAYED\fR event triggers when an immediate connection attempt is delayed and it\(cqs completion\(cqs being polled for\&. +.PP +\fBEvent metadata:\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +data\&.connect_delayed\&.addr // peer address +data\&.connect_delayed\&.err // errno value +.fi +.if n \{\ +.RE +.\} +.sp +.SS "ZMQ_EVENT_CONNECT_RETRIED: asynchronous connect / reconnection attempt" +.sp +The \fIZMQ_EVENT_CONNECT_RETRIED\fR event triggers when a connection attempt is being handled by reconnect timer\&. The reconnect interval\(cqs recomputed for each attempt\&. +.PP +\fBEvent metadata:\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +data\&.connect_retried\&.addr // peer address +data\&.connect_retried\&.interval // computed reconnect interval +.fi +.if n \{\ +.RE +.\} +.sp +.SS "ZMQ_EVENT_LISTENING: socket bound to an address, ready to accept connections" +.sp +The \fIZMQ_EVENT_LISTENING\fR event triggers when a socket\(cqs successfully bound to a an interface\&. +.PP +\fBEvent metadata:\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +data\&.listening\&.addr // listen address +data\&.listening\&.fd // socket descriptor +.fi +.if n \{\ +.RE +.\} +.sp +.SS "ZMQ_EVENT_BIND_FAILED: socket could not bind to an address" +.sp +The \fIZMQ_EVENT_BIND_FAILED\fR event triggers when a socket could not bind to a given interface\&. +.PP +\fBEvent metadata:\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +data\&.bind_failed\&.addr // listen address +data\&.bind_failed\&.err // errno value +.fi +.if n \{\ +.RE +.\} +.sp +.SS "ZMQ_EVENT_ACCEPTED: connection accepted to bound interface" +.sp +The \fIZMQ_EVENT_ACCEPTED\fR event triggers when a connection from a remote peer has been established with a socket\(cqs listen address\&. +.PP +\fBEvent metadata:\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +data\&.accepted\&.addr // listen address +data\&.accepted\&.fd // socket descriptor +.fi +.if n \{\ +.RE +.\} +.sp +.SS "ZMQ_EVENT_ACCEPT_FAILED: could not accept client connection" +.sp +The \fIZMQ_EVENT_ACCEPT_FAILED\fR event triggers when a connection attempt to a socket\(cqs bound address fails\&. +.PP +\fBEvent metadata:\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +data\&.accept_failed\&.addr // listen address +data\&.accept_failed\&.err // errno value +.fi +.if n \{\ +.RE +.\} +.sp +.SS "ZMQ_EVENT_CLOSED: connection closed" +.sp +The \fIZMQ_EVENT_CLOSED\fR event triggers when a connection\(cqs underlying descriptor has been closed\&. +.PP +\fBEvent metadata:\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +data\&.closed\&.addr // address +data\&.closed\&.fd // socket descriptor +.fi +.if n \{\ +.RE +.\} +.sp +.SS "ZMQ_EVENT_CLOSE_FAILED: connection couldn\(cqt be closed" +.sp +The \fIZMQ_EVENT_CLOSE_FAILED\fR event triggers when a descriptor could not be released back to the OS\&. +.PP +\fBEvent metadata:\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +data\&.close_failed\&.addr // address +data\&.close_failed\&.err // errno value +.fi +.if n \{\ +.RE +.\} +.sp +.SS "ZMQ_EVENT_DISCONNECTED: broken session" +.sp +The \fIZMQ_EVENT_DISCONNECTED\fR event triggers when the stream engine (tcp and ipc specific) detects a corrupted / broken session\&. +.PP +\fBEvent metadata:\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +data\&.disconnected\&.addr // address +data\&.disconnected\&.fd // socket descriptor +.fi +.if n \{\ +.RE +.\} +.sp +.SH "RETURN VALUE" +.sp +The \fIzmq_socket_monitor()\fR function returns a value of 0 or greater if successful\&. Otherwise it returns \-1 and sets \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBEPROTONOSUPPORT\fR +.RS 4 +The requested +\fItransport\fR +protocol is not supported\&. Monitor sockets are required to use the inproc:// transport\&. +.RE +.PP +\fBEINVAL\fR +.RS 4 +The endpoint supplied is invalid\&. +.RE +.SH "EXAMPLE" +.PP +\fBObserving a REP socket\(cqs connection state\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +// REP socket monitor thread +static void *rep_socket_monitor (void *ctx) +{ + zmq_event_t event; + int rc; + + void *s = zmq_socket (ctx, ZMQ_PAIR); + assert (s); + + rc = zmq_connect (s, "inproc://monitor\&.rep"); + assert (rc == 0); + while (true) { + zmq_msg_t msg; + zmq_msg_init (&msg); + rc = zmq_recvmsg (s, &msg, 0); + if (rc == \-1 && zmq_errno() == ETERM) break; + assert (rc != \-1); + memcpy (&event, zmq_msg_data (&msg), sizeof (event)); + switch (event\&.event) { + case ZMQ_EVENT_LISTENING: + printf ("listening socket descriptor %d\en", event\&.data\&.listening\&.fd); + printf ("listening socket address %s\en", event\&.data\&.listening\&.addr); + break; + case ZMQ_EVENT_ACCEPTED: + printf ("accepted socket descriptor %d\en", event\&.data\&.accepted\&.fd); + printf ("accepted socket address %s\en", event\&.data\&.accepted\&.addr); + break; + case ZMQ_EVENT_CLOSE_FAILED: + printf ("socket close failure error code %d\en", event\&.data\&.close_failed\&.err); + printf ("socket address %s\en", event\&.data\&.close_failed\&.addr); + break; + case ZMQ_EVENT_CLOSED: + printf ("closed socket descriptor %d\en", event\&.data\&.closed\&.fd); + printf ("closed socket address %s\en", event\&.data\&.closed\&.addr); + break; + case ZMQ_EVENT_DISCONNECTED: + printf ("disconnected socket descriptor %d\en", event\&.data\&.disconnected\&.fd); + printf ("disconnected socket address %s\en", event\&.data\&.disconnected\&.addr); + break; + } + zmq_msg_close (&msg); + } + zmq_close (s); + return NULL; +} + + +// Create the infrastructure +void *ctx = zmq_init (1); +assert (ctx); + +// REP socket +rep = zmq_socket (ctx, ZMQ_REP); +assert (rep); + +// REP socket monitor, all events +rc = zmq_socket_monitor (rep, "inproc://monitor\&.rep", ZMQ_EVENT_ALL); +assert (rc == 0); +rc = pthread_create (&threads [0], NULL, rep_socket_monitor, ctx); +assert (rc == 0); + +rc = zmq_bind (rep, addr); +assert (rc == 0); + +// Allow some time for event detection +zmq_sleep (1); + +// Close the REP socket +rc = zmq_close (rep); +assert (rc == 0); + +zmq_term (ctx); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Lourens Naud\('e <\m[blue]\fBlourens@methodmissing\&.com\fR\m[]\&\s-2\u[1]\d\s+2> +.SH "NOTES" +.IP " 1." 4 +lourens@methodmissing.com +.RS 4 +\%mailto:lourens@methodmissing.com +.RE diff --git a/doc/zmq_socket_monitor.html b/doc/zmq_socket_monitor.html new file mode 100644 index 0000000..1686b6f --- /dev/null +++ b/doc/zmq_socket_monitor.html @@ -0,0 +1,1063 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<div id="header">
+<h1>
+zmq_ctx_socket_monitor(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_socket_monitor -
+ register a monitoring callback
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_socket_monitor (void <em>*socket</em>, char * <em>*addr</em>, int <em>events</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_socket_monitor()</em> function shall spawn a <em>PAIR</em> socket that publishes
+socket state changes (events) over the inproc:// transport to a given endpoint.
+Messages are <em>zmq_event_t</em> structs. It’s recommended to connect via a <em>PAIR</em>
+socket in another application thread and handle monitoring events there. It’s
+possible to also supply a bitmask (<em>ZMQ_EVENT_ALL</em> or any combination of the
+<em>ZMQ_EVENT_*</em> constants) of the events you’re interested in.</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><tt>// monitoring thread
+static void *req_socket_monitor (void *ctx)
+{
+ zmq_event_t event;
+ int rc;
+
+ void *s = zmq_socket (ctx, ZMQ_PAIR);
+ assert (s);
+
+ rc = zmq_connect (s, "inproc://monitor.req");
+ assert (rc == 0);
+ while (true) {
+ zmq_msg_t msg;
+ zmq_msg_init (&msg);
+ rc = zmq_recvmsg (s, &msg, 0);
+ if (rc == -1 && zmq_errno() == ETERM) break;
+ assert (rc != -1);
+ memcpy (&event, zmq_msg_data (&msg), sizeof (event));
+ switch (event.event) {
+ case ZMQ_EVENT_CONNECTED:
+ // handle socket connected event
+ break;
+ case ZMQ_EVENT_CLOSED:
+ // handle socket closed event
+ break;
+ }
+ }
+ zmq_close (s);
+ return NULL;
+}
+
+// register a monitor endpoint for all socket events
+rc = zmq_socket_monitor (req, "inproc://monitor.req", ZMQ_EVENT_ALL);
+assert (rc == 0);
+
+// spawn a monitoring thread
+rc = pthread_create (&threads [0], NULL, req_socket_monitor, ctx);
+assert (rc == 0);</tt></pre>
+</div></div>
+<div class="paragraph"><p>Only connection oriented (tcp and ipc) transports are supported in this initial
+implementation.</p></div>
+<div class="paragraph"><p>Supported events are:</p></div>
+<div class="sect2">
+<h3 id="_zmq_event_connected_connection_established">ZMQ_EVENT_CONNECTED: connection established</h3>
+<div class="paragraph"><p>The <em>ZMQ_EVENT_CONNECTED</em> event triggers when a connection has been established
+to a remote peer. This can happen either synchronous or asynchronous.</p></div>
+<div class="listingblock">
+<div class="title">Event metadata:</div>
+<div class="content">
+<pre><tt>data.connected.addr // peer address
+data.connected.fd // socket descriptor</tt></pre>
+</div></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_event_connect_delayed_synchronous_connect_failed_it_8217_s_being_polled">ZMQ_EVENT_CONNECT_DELAYED: synchronous connect failed, it’s being polled</h3>
+<div class="paragraph"><p>The <em>ZMQ_EVENT_CONNECT_DELAYED</em> event triggers when an immediate connection
+attempt is delayed and it’s completion’s being polled for.</p></div>
+<div class="listingblock">
+<div class="title">Event metadata:</div>
+<div class="content">
+<pre><tt>data.connect_delayed.addr // peer address
+data.connect_delayed.err // errno value</tt></pre>
+</div></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_event_connect_retried_asynchronous_connect_reconnection_attempt">ZMQ_EVENT_CONNECT_RETRIED: asynchronous connect / reconnection attempt</h3>
+<div class="paragraph"><p>The <em>ZMQ_EVENT_CONNECT_RETRIED</em> event triggers when a connection attempt
+is being handled by reconnect timer. The reconnect interval’s recomputed
+for each attempt.</p></div>
+<div class="listingblock">
+<div class="title">Event metadata:</div>
+<div class="content">
+<pre><tt>data.connect_retried.addr // peer address
+data.connect_retried.interval // computed reconnect interval</tt></pre>
+</div></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_event_listening_socket_bound_to_an_address_ready_to_accept_connections">ZMQ_EVENT_LISTENING: socket bound to an address, ready to accept connections</h3>
+<div class="paragraph"><p>The <em>ZMQ_EVENT_LISTENING</em> event triggers when a socket’s successfully bound
+to a an interface.</p></div>
+<div class="listingblock">
+<div class="title">Event metadata:</div>
+<div class="content">
+<pre><tt>data.listening.addr // listen address
+data.listening.fd // socket descriptor</tt></pre>
+</div></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_event_bind_failed_socket_could_not_bind_to_an_address">ZMQ_EVENT_BIND_FAILED: socket could not bind to an address</h3>
+<div class="paragraph"><p>The <em>ZMQ_EVENT_BIND_FAILED</em> event triggers when a socket could not bind to
+a given interface.</p></div>
+<div class="listingblock">
+<div class="title">Event metadata:</div>
+<div class="content">
+<pre><tt>data.bind_failed.addr // listen address
+data.bind_failed.err // errno value</tt></pre>
+</div></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_event_accepted_connection_accepted_to_bound_interface">ZMQ_EVENT_ACCEPTED: connection accepted to bound interface</h3>
+<div class="paragraph"><p>The <em>ZMQ_EVENT_ACCEPTED</em> event triggers when a connection from a remote peer
+has been established with a socket’s listen address.</p></div>
+<div class="listingblock">
+<div class="title">Event metadata:</div>
+<div class="content">
+<pre><tt>data.accepted.addr // listen address
+data.accepted.fd // socket descriptor</tt></pre>
+</div></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_event_accept_failed_could_not_accept_client_connection">ZMQ_EVENT_ACCEPT_FAILED: could not accept client connection</h3>
+<div class="paragraph"><p>The <em>ZMQ_EVENT_ACCEPT_FAILED</em> event triggers when a connection attempt to
+a socket’s bound address fails.</p></div>
+<div class="listingblock">
+<div class="title">Event metadata:</div>
+<div class="content">
+<pre><tt>data.accept_failed.addr // listen address
+data.accept_failed.err // errno value</tt></pre>
+</div></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_event_closed_connection_closed">ZMQ_EVENT_CLOSED: connection closed</h3>
+<div class="paragraph"><p>The <em>ZMQ_EVENT_CLOSED</em> event triggers when a connection’s underlying descriptor
+has been closed.</p></div>
+<div class="listingblock">
+<div class="title">Event metadata:</div>
+<div class="content">
+<pre><tt>data.closed.addr // address
+data.closed.fd // socket descriptor</tt></pre>
+</div></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_event_close_failed_connection_couldn_8217_t_be_closed">ZMQ_EVENT_CLOSE_FAILED: connection couldn’t be closed</h3>
+<div class="paragraph"><p>The <em>ZMQ_EVENT_CLOSE_FAILED</em> event triggers when a descriptor could not be
+released back to the OS.</p></div>
+<div class="listingblock">
+<div class="title">Event metadata:</div>
+<div class="content">
+<pre><tt>data.close_failed.addr // address
+data.close_failed.err // errno value</tt></pre>
+</div></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_event_disconnected_broken_session">ZMQ_EVENT_DISCONNECTED: broken session</h3>
+<div class="paragraph"><p>The <em>ZMQ_EVENT_DISCONNECTED</em> event triggers when the stream engine (tcp and ipc
+specific) detects a corrupted / broken session.</p></div>
+<div class="listingblock">
+<div class="title">Event metadata:</div>
+<div class="content">
+<pre><tt>data.disconnected.addr // address
+data.disconnected.fd // socket descriptor</tt></pre>
+</div></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_socket_monitor()</em> function returns a value of 0 or greater if
+successful. Otherwise it returns <tt>-1</tt> and sets <em>errno</em> to one of the values
+defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EPROTONOSUPPORT</strong>
+</dt>
+<dd>
+<p>
+The requested <em>transport</em> protocol is not supported. Monitor sockets are
+required to use the inproc:// transport.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The endpoint supplied is invalid.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Observing a <em>REP</em> socket’s connection state</div>
+<div class="content">
+<pre><tt>// REP socket monitor thread
+static void *rep_socket_monitor (void *ctx)
+{
+ zmq_event_t event;
+ int rc;
+
+ void *s = zmq_socket (ctx, ZMQ_PAIR);
+ assert (s);
+
+ rc = zmq_connect (s, "inproc://monitor.rep");
+ assert (rc == 0);
+ while (true) {
+ zmq_msg_t msg;
+ zmq_msg_init (&msg);
+ rc = zmq_recvmsg (s, &msg, 0);
+ if (rc == -1 && zmq_errno() == ETERM) break;
+ assert (rc != -1);
+ memcpy (&event, zmq_msg_data (&msg), sizeof (event));
+ switch (event.event) {
+ case ZMQ_EVENT_LISTENING:
+ printf ("listening socket descriptor %d\n", event.data.listening.fd);
+ printf ("listening socket address %s\n", event.data.listening.addr);
+ break;
+ case ZMQ_EVENT_ACCEPTED:
+ printf ("accepted socket descriptor %d\n", event.data.accepted.fd);
+ printf ("accepted socket address %s\n", event.data.accepted.addr);
+ break;
+ case ZMQ_EVENT_CLOSE_FAILED:
+ printf ("socket close failure error code %d\n", event.data.close_failed.err);
+ printf ("socket address %s\n", event.data.close_failed.addr);
+ break;
+ case ZMQ_EVENT_CLOSED:
+ printf ("closed socket descriptor %d\n", event.data.closed.fd);
+ printf ("closed socket address %s\n", event.data.closed.addr);
+ break;
+ case ZMQ_EVENT_DISCONNECTED:
+ printf ("disconnected socket descriptor %d\n", event.data.disconnected.fd);
+ printf ("disconnected socket address %s\n", event.data.disconnected.addr);
+ break;
+ }
+ zmq_msg_close (&msg);
+ }
+ zmq_close (s);
+ return NULL;
+}
+
+
+// Create the infrastructure
+void *ctx = zmq_init (1);
+assert (ctx);
+
+// REP socket
+rep = zmq_socket (ctx, ZMQ_REP);
+assert (rep);
+
+// REP socket monitor, all events
+rc = zmq_socket_monitor (rep, "inproc://monitor.rep", ZMQ_EVENT_ALL);
+assert (rc == 0);
+rc = pthread_create (&threads [0], NULL, rep_socket_monitor, ctx);
+assert (rc == 0);
+
+rc = zmq_bind (rep, addr);
+assert (rc == 0);
+
+// Allow some time for event detection
+zmq_sleep (1);
+
+// Close the REP socket
+rc = zmq_close (rep);
+assert (rc == 0);
+
+zmq_term (ctx);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Lourens Naudé <<a href="mailto:lourens@methodmissing.com">lourens@methodmissing.com</a>></p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_socket_monitor.txt b/doc/zmq_socket_monitor.txt new file mode 100644 index 0000000..f289c90 --- /dev/null +++ b/doc/zmq_socket_monitor.txt @@ -0,0 +1,288 @@ +zmq_ctx_socket_monitor(3) +========================= + + +NAME +---- + +zmq_socket_monitor - register a monitoring callback + + +SYNOPSIS +-------- +*int zmq_socket_monitor (void '*socket', char * '*addr', int 'events');* + + +DESCRIPTION +----------- +The _zmq_socket_monitor()_ function shall spawn a 'PAIR' socket that publishes +socket state changes (events) over the inproc:// transport to a given endpoint. +Messages are 'zmq_event_t' structs. It's recommended to connect via a 'PAIR' +socket in another application thread and handle monitoring events there. It's +possible to also supply a bitmask ('ZMQ_EVENT_ALL' or any combination of the +'ZMQ_EVENT_*' constants) of the events you're interested in. + +---- +// monitoring thread +static void *req_socket_monitor (void *ctx) +{ + zmq_event_t event; + int rc; + + void *s = zmq_socket (ctx, ZMQ_PAIR); + assert (s); + + rc = zmq_connect (s, "inproc://monitor.req"); + assert (rc == 0); + while (true) { + zmq_msg_t msg; + zmq_msg_init (&msg); + rc = zmq_recvmsg (s, &msg, 0); + if (rc == -1 && zmq_errno() == ETERM) break; + assert (rc != -1); + memcpy (&event, zmq_msg_data (&msg), sizeof (event)); + switch (event.event) { + case ZMQ_EVENT_CONNECTED: + // handle socket connected event + break; + case ZMQ_EVENT_CLOSED: + // handle socket closed event + break; + } + } + zmq_close (s); + return NULL; +} + +// register a monitor endpoint for all socket events +rc = zmq_socket_monitor (req, "inproc://monitor.req", ZMQ_EVENT_ALL); +assert (rc == 0); + +// spawn a monitoring thread +rc = pthread_create (&threads [0], NULL, req_socket_monitor, ctx); +assert (rc == 0); +---- + +Only connection oriented (tcp and ipc) transports are supported in this initial +implementation. + +Supported events are: + + +ZMQ_EVENT_CONNECTED: connection established +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENT_CONNECTED' event triggers when a connection has been established +to a remote peer. This can happen either synchronous or asynchronous. + +.Event metadata: +---- +data.connected.addr // peer address +data.connected.fd // socket descriptor +---- + +ZMQ_EVENT_CONNECT_DELAYED: synchronous connect failed, it's being polled +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENT_CONNECT_DELAYED' event triggers when an immediate connection +attempt is delayed and it's completion's being polled for. + +.Event metadata: +---- +data.connect_delayed.addr // peer address +data.connect_delayed.err // errno value +---- + +ZMQ_EVENT_CONNECT_RETRIED: asynchronous connect / reconnection attempt +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENT_CONNECT_RETRIED' event triggers when a connection attempt +is being handled by reconnect timer. The reconnect interval's recomputed +for each attempt. + +.Event metadata: +---- +data.connect_retried.addr // peer address +data.connect_retried.interval // computed reconnect interval +---- + +ZMQ_EVENT_LISTENING: socket bound to an address, ready to accept connections +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENT_LISTENING' event triggers when a socket's successfully bound +to a an interface. + +.Event metadata: +---- +data.listening.addr // listen address +data.listening.fd // socket descriptor +---- + +ZMQ_EVENT_BIND_FAILED: socket could not bind to an address +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENT_BIND_FAILED' event triggers when a socket could not bind to +a given interface. + +.Event metadata: +---- +data.bind_failed.addr // listen address +data.bind_failed.err // errno value +---- + +ZMQ_EVENT_ACCEPTED: connection accepted to bound interface +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENT_ACCEPTED' event triggers when a connection from a remote peer +has been established with a socket's listen address. + +.Event metadata: +---- +data.accepted.addr // listen address +data.accepted.fd // socket descriptor +---- + +ZMQ_EVENT_ACCEPT_FAILED: could not accept client connection +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENT_ACCEPT_FAILED' event triggers when a connection attempt to +a socket's bound address fails. + +.Event metadata: +---- +data.accept_failed.addr // listen address +data.accept_failed.err // errno value +---- + +ZMQ_EVENT_CLOSED: connection closed +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENT_CLOSED' event triggers when a connection's underlying descriptor +has been closed. + +.Event metadata: +---- +data.closed.addr // address +data.closed.fd // socket descriptor +---- + +ZMQ_EVENT_CLOSE_FAILED: connection couldn't be closed +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENT_CLOSE_FAILED' event triggers when a descriptor could not be +released back to the OS. + +.Event metadata: +---- +data.close_failed.addr // address +data.close_failed.err // errno value +---- + +ZMQ_EVENT_DISCONNECTED: broken session +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENT_DISCONNECTED' event triggers when the stream engine (tcp and ipc +specific) detects a corrupted / broken session. + +.Event metadata: +---- +data.disconnected.addr // address +data.disconnected.fd // socket descriptor +---- + +RETURN VALUE +------------ +The _zmq_socket_monitor()_ function returns a value of 0 or greater if +successful. Otherwise it returns `-1` and sets 'errno' to one of the values +defined below. + + +ERRORS +------ +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. + +*EPROTONOSUPPORT*:: +The requested 'transport' protocol is not supported. Monitor sockets are +required to use the inproc:// transport. + +*EINVAL*:: +The endpoint supplied is invalid. + +EXAMPLE +------- +.Observing a 'REP' socket's connection state +---- +// REP socket monitor thread +static void *rep_socket_monitor (void *ctx) +{ + zmq_event_t event; + int rc; + + void *s = zmq_socket (ctx, ZMQ_PAIR); + assert (s); + + rc = zmq_connect (s, "inproc://monitor.rep"); + assert (rc == 0); + while (true) { + zmq_msg_t msg; + zmq_msg_init (&msg); + rc = zmq_recvmsg (s, &msg, 0); + if (rc == -1 && zmq_errno() == ETERM) break; + assert (rc != -1); + memcpy (&event, zmq_msg_data (&msg), sizeof (event)); + switch (event.event) { + case ZMQ_EVENT_LISTENING: + printf ("listening socket descriptor %d\n", event.data.listening.fd); + printf ("listening socket address %s\n", event.data.listening.addr); + break; + case ZMQ_EVENT_ACCEPTED: + printf ("accepted socket descriptor %d\n", event.data.accepted.fd); + printf ("accepted socket address %s\n", event.data.accepted.addr); + break; + case ZMQ_EVENT_CLOSE_FAILED: + printf ("socket close failure error code %d\n", event.data.close_failed.err); + printf ("socket address %s\n", event.data.close_failed.addr); + break; + case ZMQ_EVENT_CLOSED: + printf ("closed socket descriptor %d\n", event.data.closed.fd); + printf ("closed socket address %s\n", event.data.closed.addr); + break; + case ZMQ_EVENT_DISCONNECTED: + printf ("disconnected socket descriptor %d\n", event.data.disconnected.fd); + printf ("disconnected socket address %s\n", event.data.disconnected.addr); + break; + } + zmq_msg_close (&msg); + } + zmq_close (s); + return NULL; +} + + +// Create the infrastructure +void *ctx = zmq_init (1); +assert (ctx); + +// REP socket +rep = zmq_socket (ctx, ZMQ_REP); +assert (rep); + +// REP socket monitor, all events +rc = zmq_socket_monitor (rep, "inproc://monitor.rep", ZMQ_EVENT_ALL); +assert (rc == 0); +rc = pthread_create (&threads [0], NULL, rep_socket_monitor, ctx); +assert (rc == 0); + +rc = zmq_bind (rep, addr); +assert (rc == 0); + +// Allow some time for event detection +zmq_sleep (1); + +// Close the REP socket +rc = zmq_close (rep); +assert (rc == 0); + +zmq_term (ctx); +---- + + +SEE ALSO +-------- +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Lourens Naudé <lourens@methodmissing.com>
\ No newline at end of file diff --git a/doc/zmq_strerror.3 b/doc/zmq_strerror.3 new file mode 100644 index 0000000..6b708b9 --- /dev/null +++ b/doc/zmq_strerror.3 @@ -0,0 +1,78 @@ +'\" t +.\" Title: zmq_strerror +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_STRERROR" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_strerror \- get 0MQ error message string +.SH "SYNOPSIS" +.sp +\fBconst char *zmq_strerror (int \fR\fB\fIerrnum\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_strerror()\fR function shall return a pointer to an error message string corresponding to the error number specified by the \fIerrnum\fR argument\&. As 0MQ defines additional error numbers over and above those defined by the operating system, applications should use \fIzmq_strerror()\fR in preference to the standard \fIstrerror()\fR function\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_strerror()\fR function shall return a pointer to an error message string\&. +.SH "ERRORS" +.sp +No errors are defined\&. +.SH "EXAMPLE" +.PP +\fBDisplaying an error message when a 0MQ context cannot be initialised\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +void *ctx = zmq_init (1, 1, 0); +if (!ctx) { + printf ("Error occurred during zmq_init(): %s\en", zmq_strerror (errno)); + abort (); +} +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_strerror.html b/doc/zmq_strerror.html new file mode 100644 index 0000000..2497b95 --- /dev/null +++ b/doc/zmq_strerror.html @@ -0,0 +1,814 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_strerror(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_strerror -
+ get 0MQ error message string
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>const char *zmq_strerror (int <em>errnum</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_strerror()</em> function shall return a pointer to an error message string
+corresponding to the error number specified by the <em>errnum</em> argument. As ØMQ
+defines additional error numbers over and above those defined by the operating
+system, applications should use <em>zmq_strerror()</em> in preference to the standard
+<em>strerror()</em> function.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_strerror()</em> function shall return a pointer to an error message
+string.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>No errors are defined.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Displaying an error message when a ØMQ context cannot be initialised</div>
+<div class="content">
+<pre><tt>void *ctx = zmq_init (1, 1, 0);
+if (!ctx) {
+ printf ("Error occurred during zmq_init(): %s\n", zmq_strerror (errno));
+ abort ();
+}</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_strerror.txt b/doc/zmq_strerror.txt new file mode 100644 index 0000000..2cd9829 --- /dev/null +++ b/doc/zmq_strerror.txt @@ -0,0 +1,55 @@ +zmq_strerror(3) +=============== + + +NAME +---- +zmq_strerror - get 0MQ error message string + + +SYNOPSIS +-------- +*const char *zmq_strerror (int 'errnum');* + + +DESCRIPTION +----------- +The _zmq_strerror()_ function shall return a pointer to an error message string +corresponding to the error number specified by the 'errnum' argument. As 0MQ +defines additional error numbers over and above those defined by the operating +system, applications should use _zmq_strerror()_ in preference to the standard +_strerror()_ function. + + +RETURN VALUE +------------ +The _zmq_strerror()_ function shall return a pointer to an error message +string. + + +ERRORS +------ +No errors are defined. + + +EXAMPLE +------- +.Displaying an error message when a 0MQ context cannot be initialised +---- +void *ctx = zmq_init (1, 1, 0); +if (!ctx) { + printf ("Error occurred during zmq_init(): %s\n", zmq_strerror (errno)); + abort (); +} +---- + + +SEE ALSO +-------- +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_tcp.7 b/doc/zmq_tcp.7 new file mode 100644 index 0000000..ac6c23e --- /dev/null +++ b/doc/zmq_tcp.7 @@ -0,0 +1,193 @@ +'\" t +.\" Title: zmq_tcp +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.2 +.\" Language: English +.\" +.TH "ZMQ_TCP" "7" "11/23/2012" "0MQ 3\&.2\&.2" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_tcp \- 0MQ unicast transport using TCP +.SH "SYNOPSIS" +.sp +TCP is an ubiquitous, reliable, unicast transport\&. When connecting distributed applications over a network with 0MQ, using the TCP transport will likely be your first choice\&. +.SH "ADDRESSING" +.sp +A 0MQ endpoint is a string consisting of a \fItransport\fR:// followed by an \fIaddress\fR\&. The \fItransport\fR specifies the underlying protocol to use\&. The \fIaddress\fR specifies the transport\-specific address to connect to\&. +.sp +For the TCP transport, the transport is tcp, and the meaning of the \fIaddress\fR part is defined below\&. +.SS "Assigning a local address to a socket" +.sp +When assigning a local address to a socket using \fIzmq_bind()\fR with the \fItcp\fR transport, the \fIendpoint\fR shall be interpreted as an \fIinterface\fR followed by a colon and the TCP port number to use\&. +.sp +An \fIinterface\fR may be specified by either of the following: +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The wild\-card +*, meaning all available interfaces\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The primary IPv4 or IPv6 address assigned to the interface, in its numeric representation\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The non\-portable interface name as defined by the operating system\&. +.RE +.sp +The TCP port number may be specified by: +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +A numeric value, usually above 1024 on POSIX systems\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The wild\-card +*, meaning a system\-assigned ephemeral port\&. +.RE +.sp +When using ephemeral ports, the caller should retrieve the actual assigned port using the ZMQ_LAST_ENDPOINT socket option\&. See \fBzmq_getsockopt\fR(3) for details\&. +.SS "Connecting a socket" +.sp +When connecting a socket to a peer address using \fIzmq_connect()\fR with the \fItcp\fR transport, the \fIendpoint\fR shall be interpreted as a \fIpeer address\fR followed by a colon and the TCP port number to use\&. +.sp +A \fIpeer address\fR may be specified by either of the following: +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The DNS name of the peer\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +The IPv4 or IPv6 address of the peer, in its numeric representation\&. +.RE +.SH "EXAMPLES" +.PP +\fBAssigning a local address to a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +// TCP port 5555 on all available interfaces +rc = zmq_bind(socket, "tcp:/// :5555"); +assert (rc == 0); +// TCP port 5555 on the local loop\-back interface on all platforms +rc = zmq_bind(socket, "tcp://127\&.0\&.0\&.1:5555"); +assert (rc == 0); +// TCP port 5555 on the first Ethernet network interface on Linux +rc = zmq_bind(socket, "tcp://eth0:5555"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.PP +\fBConnecting a socket\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +// Connecting using an IP address +rc = zmq_connect(socket, "tcp://192\&.168\&.1\&.1:5555"); +assert (rc == 0); +// Connecting using a DNS name +rc = zmq_connect(socket, "tcp://server1:5555"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_bind\fR(3) \fBzmq_connect\fR(3) \fBzmq_pgm\fR(7) \fBzmq_ipc\fR(7) \fBzmq_inproc\fR(7) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Pieter Hintjens <\m[blue]\fBph@imatix\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[2]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[3]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +ph@imatix.com +.RS 4 +\%mailto:ph@imatix.com +.RE +.IP " 2." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 3." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_tcp.html b/doc/zmq_tcp.html new file mode 100644 index 0000000..90c732d --- /dev/null +++ b/doc/zmq_tcp.html @@ -0,0 +1,882 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<div id="header">
+<h1>
+zmq_tcp(7) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_tcp -
+ 0MQ unicast transport using TCP
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>TCP is an ubiquitous, reliable, unicast transport. When connecting distributed
+applications over a network with ØMQ, using the TCP transport will likely be
+your first choice.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_addressing">ADDRESSING</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>A ØMQ endpoint is a string consisting of a <em>transport</em><tt>://</tt> followed by an
+<em>address</em>. The <em>transport</em> specifies the underlying protocol to use. The
+<em>address</em> specifies the transport-specific address to connect to.</p></div>
+<div class="paragraph"><p>For the TCP transport, the transport is <tt>tcp</tt>, and the meaning of the
+<em>address</em> part is defined below.</p></div>
+<div class="sect2">
+<h3 id="_assigning_a_local_address_to_a_socket">Assigning a local address to a socket</h3>
+<div class="paragraph"><p>When assigning a local address to a socket using <em>zmq_bind()</em> with the <em>tcp</em>
+transport, the <em>endpoint</em> shall be interpreted as an <em>interface</em> followed by a
+colon and the TCP port number to use.</p></div>
+<div class="paragraph"><p>An <em>interface</em> may be specified by either of the following:</p></div>
+<div class="ulist"><ul>
+<li>
+<p>
+The wild-card <tt>*</tt>, meaning all available interfaces.
+</p>
+</li>
+<li>
+<p>
+The primary IPv4 or IPv6 address assigned to the interface, in its numeric
+ representation.
+</p>
+</li>
+<li>
+<p>
+The non-portable interface name as defined by the operating system.
+</p>
+</li>
+</ul></div>
+<div class="paragraph"><p>The TCP port number may be specified by:</p></div>
+<div class="ulist"><ul>
+<li>
+<p>
+A numeric value, usually above 1024 on POSIX systems.
+</p>
+</li>
+<li>
+<p>
+The wild-card <tt>*</tt>, meaning a system-assigned ephemeral port.
+</p>
+</li>
+</ul></div>
+<div class="paragraph"><p>When using ephemeral ports, the caller should retrieve the actual assigned
+port using the ZMQ_LAST_ENDPOINT socket option. See <a href="zmq_getsockopt.html">zmq_getsockopt(3)</a>
+for details.</p></div>
+</div>
+<div class="sect2">
+<h3 id="_connecting_a_socket">Connecting a socket</h3>
+<div class="paragraph"><p>When connecting a socket to a peer address using <em>zmq_connect()</em> with the <em>tcp</em>
+transport, the <em>endpoint</em> shall be interpreted as a <em>peer address</em> followed by
+a colon and the TCP port number to use.</p></div>
+<div class="paragraph"><p>A <em>peer address</em> may be specified by either of the following:</p></div>
+<div class="ulist"><ul>
+<li>
+<p>
+The DNS name of the peer.
+</p>
+</li>
+<li>
+<p>
+The IPv4 or IPv6 address of the peer, in its numeric representation.
+</p>
+</li>
+</ul></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_examples">EXAMPLES</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Assigning a local address to a socket</div>
+<div class="content">
+<pre><tt>// TCP port 5555 on all available interfaces
+rc = zmq_bind(socket, "tcp:/// :5555");
+assert (rc == 0);
+// TCP port 5555 on the local loop-back interface on all platforms
+rc = zmq_bind(socket, "tcp://127.0.0.1:5555");
+assert (rc == 0);
+// TCP port 5555 on the first Ethernet network interface on Linux
+rc = zmq_bind(socket, "tcp://eth0:5555");
+assert (rc == 0);</tt></pre>
+</div></div>
+<div class="listingblock">
+<div class="title">Connecting a socket</div>
+<div class="content">
+<pre><tt>// Connecting using an IP address
+rc = zmq_connect(socket, "tcp://192.168.1.1:5555");
+assert (rc == 0);
+// Connecting using a DNS name
+rc = zmq_connect(socket, "tcp://server1:5555");
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_bind.html">zmq_bind(3)</a>
+<a href="zmq_connect.html">zmq_connect(3)</a>
+<a href="zmq_pgm.html">zmq_pgm(7)</a>
+<a href="zmq_ipc.html">zmq_ipc(7)</a>
+<a href="zmq_inproc.html">zmq_inproc(7)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Pieter Hintjens <<a href="mailto:ph@imatix.com">ph@imatix.com</a>>,
+Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-11-14 10:09:14 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_tcp.txt b/doc/zmq_tcp.txt new file mode 100644 index 0000000..a87aaa0 --- /dev/null +++ b/doc/zmq_tcp.txt @@ -0,0 +1,101 @@ +zmq_tcp(7) +========== + + +NAME +---- +zmq_tcp - 0MQ unicast transport using TCP + + +SYNOPSIS +-------- +TCP is an ubiquitous, reliable, unicast transport. When connecting distributed +applications over a network with 0MQ, using the TCP transport will likely be +your first choice. + + +ADDRESSING +---------- +A 0MQ endpoint is a string consisting of a 'transport'`://` followed by an +'address'. The 'transport' specifies the underlying protocol to use. The +'address' specifies the transport-specific address to connect to. + +For the TCP transport, the transport is `tcp`, and the meaning of the +'address' part is defined below. + + +Assigning a local address to a socket +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +When assigning a local address to a socket using _zmq_bind()_ with the 'tcp' +transport, the 'endpoint' shall be interpreted as an 'interface' followed by a +colon and the TCP port number to use. + +An 'interface' may be specified by either of the following: + +* The wild-card `*`, meaning all available interfaces. +* The primary IPv4 or IPv6 address assigned to the interface, in its numeric + representation. +* The non-portable interface name as defined by the operating system. + +The TCP port number may be specified by: + +* A numeric value, usually above 1024 on POSIX systems. +* The wild-card `*`, meaning a system-assigned ephemeral port. + +When using ephemeral ports, the caller should retrieve the actual assigned +port using the ZMQ_LAST_ENDPOINT socket option. See linkzmq:zmq_getsockopt[3] +for details. + + +Connecting a socket +~~~~~~~~~~~~~~~~~~~ +When connecting a socket to a peer address using _zmq_connect()_ with the 'tcp' +transport, the 'endpoint' shall be interpreted as a 'peer address' followed by +a colon and the TCP port number to use. + +A 'peer address' may be specified by either of the following: + +* The DNS name of the peer. +* The IPv4 or IPv6 address of the peer, in its numeric representation. + + +EXAMPLES +-------- +.Assigning a local address to a socket +---- +// TCP port 5555 on all available interfaces +rc = zmq_bind(socket, "tcp:/// :5555"); +assert (rc == 0); +// TCP port 5555 on the local loop-back interface on all platforms +rc = zmq_bind(socket, "tcp://127.0.0.1:5555"); +assert (rc == 0); +// TCP port 5555 on the first Ethernet network interface on Linux +rc = zmq_bind(socket, "tcp://eth0:5555"); +assert (rc == 0); +---- + +.Connecting a socket +---- +// Connecting using an IP address +rc = zmq_connect(socket, "tcp://192.168.1.1:5555"); +assert (rc == 0); +// Connecting using a DNS name +rc = zmq_connect(socket, "tcp://server1:5555"); +assert (rc == 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_bind[3] +linkzmq:zmq_connect[3] +linkzmq:zmq_pgm[7] +linkzmq:zmq_ipc[7] +linkzmq:zmq_inproc[7] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com>, +Martin Sustrik <sustrik@250bpm.com> and Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_term.3 b/doc/zmq_term.3 new file mode 100644 index 0000000..32f8ab3 --- /dev/null +++ b/doc/zmq_term.3 @@ -0,0 +1,137 @@ +'\" t +.\" Title: zmq_term +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_TERM" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_term \- terminate 0MQ context +.SH "SYNOPSIS" +.sp +\fBint zmq_term (void \fR\fB\fI*context\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_term()\fR function shall terminate the 0MQ context \fIcontext\fR\&. +.sp +Context termination is performed in the following steps: +.sp +.RS 4 +.ie n \{\ +\h'-04' 1.\h'+01'\c +.\} +.el \{\ +.sp -1 +.IP " 1." 4.2 +.\} +Any blocking operations currently in progress on sockets open within +\fIcontext\fR +shall return immediately with an error code of ETERM\&. With the exception of +\fIzmq_close()\fR, any further operations on sockets open within +\fIcontext\fR +shall fail with an error code of ETERM\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04' 2.\h'+01'\c +.\} +.el \{\ +.sp -1 +.IP " 2." 4.2 +.\} +After interrupting all blocking calls, +\fIzmq_term()\fR +shall +\fIblock\fR +until the following conditions are satisfied: +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +All sockets open within +\fIcontext\fR +have been closed with +\fIzmq_close()\fR\&. +.RE +.sp +.RS 4 +.ie n \{\ +\h'-04'\(bu\h'+03'\c +.\} +.el \{\ +.sp -1 +.IP \(bu 2.3 +.\} +For each socket within +\fIcontext\fR, all messages sent by the application with +\fIzmq_send()\fR +have either been physically transferred to a network peer, or the socket\(cqs linger period set with the +\fIZMQ_LINGER\fR +socket option has expired\&. +.RE +.RE +.sp +For further details regarding socket linger behaviour refer to the \fIZMQ_LINGER\fR option in \fBzmq_setsockopt\fR(3)\&. +.sp +This function is deprecated by \fBzmq_ctx_destroy\fR(3)\&. +.SH "RETURN VALUE" +.sp +The \fIzmq_term()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEFAULT\fR +.RS 4 +The provided +\fIcontext\fR +was invalid\&. +.RE +.PP +\fBEINTR\fR +.RS 4 +Termination was interrupted by a signal\&. It can be restarted if needed\&. +.RE +.SH "SEE ALSO" +.sp +\fBzmq\fR(7) \fBzmq_init\fR(3) \fBzmq_close\fR(3) \fBzmq_setsockopt\fR(3) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_term.html b/doc/zmq_term.html new file mode 100644 index 0000000..de26f6c --- /dev/null +++ b/doc/zmq_term.html @@ -0,0 +1,851 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_term(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_term -
+ terminate 0MQ context
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>int zmq_term (void <em>*context</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_term()</em> function shall terminate the ØMQ context <em>context</em>.</p></div>
+<div class="paragraph"><p>Context termination is performed in the following steps:</p></div>
+<div class="olist arabic"><ol class="arabic">
+<li>
+<p>
+Any blocking operations currently in progress on sockets open within
+ <em>context</em> shall return immediately with an error code of ETERM. With the
+ exception of <em>zmq_close()</em>, any further operations on sockets open within
+ <em>context</em> shall fail with an error code of ETERM.
+</p>
+</li>
+<li>
+<p>
+After interrupting all blocking calls, <em>zmq_term()</em> shall <em>block</em> until the
+ following conditions are satisfied:
+</p>
+<div class="ulist"><ul>
+<li>
+<p>
+All sockets open within <em>context</em> have been closed with <em>zmq_close()</em>.
+</p>
+</li>
+<li>
+<p>
+For each socket within <em>context</em>, all messages sent by the application
+ with <em>zmq_send()</em> have either been physically transferred to a network
+ peer, or the socket’s linger period set with the <em>ZMQ_LINGER</em> socket
+ option has expired.
+</p>
+</li>
+</ul></div>
+</li>
+</ol></div>
+<div class="paragraph"><p>For further details regarding socket linger behaviour refer to the <em>ZMQ_LINGER</em>
+option in <a href="zmq_setsockopt.html">zmq_setsockopt(3)</a>.</p></div>
+<div class="paragraph"><p>This function is deprecated by <a href="zmq_ctx_destroy.html">zmq_ctx_destroy(3)</a>.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_term()</em> function shall return zero if successful. Otherwise it shall
+return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EFAULT</strong>
+</dt>
+<dd>
+<p>
+The provided <em>context</em> was invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>EINTR</strong>
+</dt>
+<dd>
+<p>
+Termination was interrupted by a signal. It can be restarted if needed.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq.html">zmq(7)</a>
+<a href="zmq_init.html">zmq_init(3)</a>
+<a href="zmq_close.html">zmq_close(3)</a>
+<a href="zmq_setsockopt.html">zmq_setsockopt(3)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_term.txt b/doc/zmq_term.txt new file mode 100644 index 0000000..f3604ce --- /dev/null +++ b/doc/zmq_term.txt @@ -0,0 +1,66 @@ +zmq_term(3) +=========== + + +NAME +---- +zmq_term - terminate 0MQ context + + +SYNOPSIS +-------- +*int zmq_term (void '*context');* + + +DESCRIPTION +----------- +The _zmq_term()_ function shall terminate the 0MQ context 'context'. + +Context termination is performed in the following steps: + +1. Any blocking operations currently in progress on sockets open within + 'context' shall return immediately with an error code of ETERM. With the + exception of _zmq_close()_, any further operations on sockets open within + 'context' shall fail with an error code of ETERM. + +2. After interrupting all blocking calls, _zmq_term()_ shall _block_ until the + following conditions are satisfied: + + * All sockets open within 'context' have been closed with _zmq_close()_. + + * For each socket within 'context', all messages sent by the application + with _zmq_send()_ have either been physically transferred to a network + peer, or the socket's linger period set with the _ZMQ_LINGER_ socket + option has expired. + +For further details regarding socket linger behaviour refer to the _ZMQ_LINGER_ +option in linkzmq:zmq_setsockopt[3]. + +This function is deprecated by linkzmq:zmq_ctx_destroy[3]. + +RETURN VALUE +------------ +The _zmq_term()_ function shall return zero if successful. Otherwise it shall +return `-1` and set 'errno' to one of the values defined below. + + +ERRORS +------ +*EFAULT*:: +The provided 'context' was invalid. +*EINTR*:: +Termination was interrupted by a signal. It can be restarted if needed. + + +SEE ALSO +-------- +linkzmq:zmq[7] +linkzmq:zmq_init[3] +linkzmq:zmq_close[3] +linkzmq:zmq_setsockopt[3] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. diff --git a/doc/zmq_unbind.3 b/doc/zmq_unbind.3 new file mode 100644 index 0000000..a83a1e5 --- /dev/null +++ b/doc/zmq_unbind.3 @@ -0,0 +1,108 @@ +'\" t +.\" Title: zmq_unbind +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_UNBIND" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_unbind \- Stop accepting connections on a socket +.SH "SYNOPSIS" +.sp +int zmq_unbind (void \fI*socket\fR, const char \fI*endpoint\fR); +.SH "DESCRIPTION" +.sp +The \fIzmq_unbind()\fR function shall unbind a socket specified by the \fIsocket\fR argument from the endpoint specified by the \fIendpoint\fR argument\&. +.sp +The \fIendpoint\fR argument is as described in \fBzmq_bind\fR(3) +.SH "RETURN VALUE" +.sp +The \fIzmq_unbind()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&. +.SH "ERRORS" +.PP +\fBEINVAL\fR +.RS 4 +The endpoint supplied is invalid\&. +.RE +.PP +\fBETERM\fR +.RS 4 +The 0MQ +\fIcontext\fR +associated with the specified +\fIsocket\fR +was terminated\&. +.RE +.PP +\fBENOTSOCK\fR +.RS 4 +The provided +\fIsocket\fR +was invalid\&. +.RE +.SH "EXAMPLE" +.PP +\fBUnbind a subscriber socket from a TCP transport\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +/* Create a ZMQ_SUB socket */ +void *socket = zmq_socket (context, ZMQ_SUB); +assert (socket); +/* Connect it to the host server001, port 5555 using a TCP transport */ +rc = zmq_bind (socket, "tcp://127\&.0\&.0\&.1:5555"); +assert (rc == 0); +/* Disconnect from the previously connected endpoint */ +rc = zmq_unbind (socket, "tcp://127\&.0\&.0\&.1:5555"); +assert (rc == 0); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq_bind\fR(3) \fBzmq_socket\fR(3) \fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2>, Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2> and Ian Barber <\m[blue]\fBian\&.barber@gmail\&.com\fR\m[]\&\s-2\u[3]\d\s+2> +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE +.IP " 3." 4 +ian.barber@gmail.com +.RS 4 +\%mailto:ian.barber@gmail.com +.RE diff --git a/doc/zmq_unbind.html b/doc/zmq_unbind.html new file mode 100644 index 0000000..a9c4601 --- /dev/null +++ b/doc/zmq_unbind.html @@ -0,0 +1,844 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<body class="manpage">
+<div id="header">
+<h1>
+zmq_unbind(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_unbind -
+ Stop accepting connections on a socket
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>int zmq_unbind (void <em>*socket</em>, const char <em>*endpoint</em>);</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_unbind()</em> function shall unbind a socket specified
+by the <em>socket</em> argument from the endpoint specified by the <em>endpoint</em>
+argument.</p></div>
+<div class="paragraph"><p>The <em>endpoint</em> argument is as described in <a href="zmq_bind.html">zmq_bind(3)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_unbind()</em> function shall return zero if successful. Otherwise it
+shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<strong>EINVAL</strong>
+</dt>
+<dd>
+<p>
+The endpoint supplied is invalid.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ETERM</strong>
+</dt>
+<dd>
+<p>
+The ØMQ <em>context</em> associated with the specified <em>socket</em> was terminated.
+</p>
+</dd>
+<dt class="hdlist1">
+<strong>ENOTSOCK</strong>
+</dt>
+<dd>
+<p>
+The provided <em>socket</em> was invalid.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Unbind a subscriber socket from a TCP transport</div>
+<div class="content">
+<pre><tt>/* Create a ZMQ_SUB socket */
+void *socket = zmq_socket (context, ZMQ_SUB);
+assert (socket);
+/* Connect it to the host server001, port 5555 using a TCP transport */
+rc = zmq_bind (socket, "tcp://127.0.0.1:5555");
+assert (rc == 0);
+/* Disconnect from the previously connected endpoint */
+rc = zmq_unbind (socket, "tcp://127.0.0.1:5555");
+assert (rc == 0);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq_bind.html">zmq_bind(3)</a>
+<a href="zmq_socket.html">zmq_socket(3)</a>
+<a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>>,
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>> and Ian Barber <<a href="mailto:ian.barber@gmail.com">ian.barber@gmail.com</a>></p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_unbind.txt b/doc/zmq_unbind.txt new file mode 100644 index 0000000..4633ee0 --- /dev/null +++ b/doc/zmq_unbind.txt @@ -0,0 +1,65 @@ +zmq_unbind(3) +============== + + +NAME +---- +zmq_unbind - Stop accepting connections on a socket + + +SYNOPSIS +-------- +int zmq_unbind (void '*socket', const char '*endpoint'); + + +DESCRIPTION +----------- +The _zmq_unbind()_ function shall unbind a socket specified +by the 'socket' argument from the endpoint specified by the 'endpoint' +argument. + +The 'endpoint' argument is as described in linkzmq:zmq_bind[3] + + +RETURN VALUE +------------ +The _zmq_unbind()_ function shall return zero if successful. Otherwise it +shall return `-1` and set 'errno' to one of the values defined below. + +ERRORS +------ +*EINVAL*:: +The endpoint supplied is invalid. +*ETERM*:: +The 0MQ 'context' associated with the specified 'socket' was terminated. +*ENOTSOCK*:: +The provided 'socket' was invalid. + + +EXAMPLE +------- +.Unbind a subscriber socket from a TCP transport +---- +/* Create a ZMQ_SUB socket */ +void *socket = zmq_socket (context, ZMQ_SUB); +assert (socket); +/* Connect it to the host server001, port 5555 using a TCP transport */ +rc = zmq_bind (socket, "tcp://127.0.0.1:5555"); +assert (rc == 0); +/* Disconnect from the previously connected endpoint */ +rc = zmq_unbind (socket, "tcp://127.0.0.1:5555"); +assert (rc == 0); +---- + + +SEE ALSO +-------- +linkzmq:zmq_bind[3] +linkzmq:zmq_socket[3] +linkzmq:zmq[7] + + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com>, +Martin Lucina <mato@kotelna.sk> and Ian Barber <ian.barber@gmail.com> diff --git a/doc/zmq_version.3 b/doc/zmq_version.3 new file mode 100644 index 0000000..926c07f --- /dev/null +++ b/doc/zmq_version.3 @@ -0,0 +1,78 @@ +'\" t +.\" Title: zmq_version +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> +.\" Date: 11/23/2012 +.\" Manual: 0MQ Manual +.\" Source: 0MQ 3.2.1 +.\" Language: English +.\" +.TH "ZMQ_VERSION" "3" "11/23/2012" "0MQ 3\&.2\&.1" "0MQ Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +zmq_version \- report 0MQ library version +.SH "SYNOPSIS" +.sp +\fBvoid zmq_version (int \fR\fB\fI*major\fR\fR\fB, int \fR\fB\fI*minor\fR\fR\fB, int \fR\fB\fI*patch\fR\fR\fB);\fR +.SH "DESCRIPTION" +.sp +The \fIzmq_version()\fR function shall fill in the integer variables pointed to by the \fImajor\fR, \fIminor\fR and \fIpatch\fR arguments with the major, minor and patch level components of the 0MQ library version\&. +.sp +This functionality is intended for applications or language bindings dynamically linking to the 0MQ library that wish to determine the actual version of the 0MQ library they are using\&. +.SH "RETURN VALUE" +.sp +There is no return value\&. +.SH "ERRORS" +.sp +No errors are defined\&. +.SH "EXAMPLE" +.PP +\fBPrinting out the version of the 0MQ library\fR. +.sp +.if n \{\ +.RS 4 +.\} +.nf +int major, minor, patch; +zmq_version (&major, &minor, &patch); +printf ("Current 0MQ version is %d\&.%d\&.%d\en", major, minor, patch); +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.sp +\fBzmq\fR(7) +.SH "AUTHORS" +.sp +This 0MQ manual page was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmato@kotelna\&.sk\fR\m[]\&\s-2\u[2]\d\s+2>\&. +.SH "NOTES" +.IP " 1." 4 +sustrik@250bpm.com +.RS 4 +\%mailto:sustrik@250bpm.com +.RE +.IP " 2." 4 +mato@kotelna.sk +.RS 4 +\%mailto:mato@kotelna.sk +.RE diff --git a/doc/zmq_version.html b/doc/zmq_version.html new file mode 100644 index 0000000..6e14fc3 --- /dev/null +++ b/doc/zmq_version.html @@ -0,0 +1,812 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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+<div id="header">
+<h1>
+zmq_version(3) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>zmq_version -
+ report 0MQ library version
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_synopsis">SYNOPSIS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><strong>void zmq_version (int <em>*major</em>, int <em>*minor</em>, int <em>*patch</em>);</strong></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <em>zmq_version()</em> function shall fill in the integer variables pointed to by
+the <em>major</em>, <em>minor</em> and <em>patch</em> arguments with the major, minor and patch level
+components of the ØMQ library version.</p></div>
+<div class="paragraph"><p>This functionality is intended for applications or language bindings
+dynamically linking to the ØMQ library that wish to determine the actual
+version of the ØMQ library they are using.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_return_value">RETURN VALUE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>There is no return value.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_errors">ERRORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>No errors are defined.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_example">EXAMPLE</h2>
+<div class="sectionbody">
+<div class="listingblock">
+<div class="title">Printing out the version of the ØMQ library</div>
+<div class="content">
+<pre><tt>int major, minor, patch;
+zmq_version (&major, &minor, &patch);
+printf ("Current 0MQ version is %d.%d.%d\n", major, minor, patch);</tt></pre>
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_see_also">SEE ALSO</h2>
+<div class="sectionbody">
+<div class="paragraph"><p><a href="zmq.html">zmq(7)</a></p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_authors">AUTHORS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
+Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+ØMQ 3.2.2<br />
+Last updated 2012-10-25 17:30:40 KST
+</div>
+</div>
+</body>
+</html>
diff --git a/doc/zmq_version.txt b/doc/zmq_version.txt new file mode 100644 index 0000000..eeb0b40 --- /dev/null +++ b/doc/zmq_version.txt @@ -0,0 +1,53 @@ +zmq_version(3) +============== + + +NAME +---- +zmq_version - report 0MQ library version + + +SYNOPSIS +-------- +*void zmq_version (int '*major', int '*minor', int '*patch');* + + +DESCRIPTION +----------- +The _zmq_version()_ function shall fill in the integer variables pointed to by +the 'major', 'minor' and 'patch' arguments with the major, minor and patch level +components of the 0MQ library version. + +This functionality is intended for applications or language bindings +dynamically linking to the 0MQ library that wish to determine the actual +version of the 0MQ library they are using. + + +RETURN VALUE +------------ +There is no return value. + + +ERRORS +------ +No errors are defined. + + +EXAMPLE +------- +.Printing out the version of the 0MQ library +---- +int major, minor, patch; +zmq_version (&major, &minor, &patch); +printf ("Current 0MQ version is %d.%d.%d\n", major, minor, patch); +---- + + +SEE ALSO +-------- +linkzmq:zmq[7] + +AUTHORS +------- +This 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com> and +Martin Lucina <mato@kotelna.sk>. |