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| author | DongHun Kwak <dh0128.kwak@samsung.com> | 2017-09-13 11:08:07 +0900 |
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| committer | DongHun Kwak <dh0128.kwak@samsung.com> | 2017-09-13 11:09:00 +0900 |
| commit | b5c87084afaef42b2d058f68091be31988a6a874 (patch) | |
| tree | adef9a65870a41181687e11d57fdf98e7629de3c /doc/html/boost_asio/overview/rationale.html | |
| parent | 34bd32e225e2a8a94104489b31c42e5801cc1f4a (diff) | |
| download | boost-b5c87084afaef42b2d058f68091be31988a6a874.tar.gz boost-b5c87084afaef42b2d058f68091be31988a6a874.tar.bz2 boost-b5c87084afaef42b2d058f68091be31988a6a874.zip | |
Imported Upstream version 1.64.0upstream/1.64.0
Change-Id: Id9212edd016dd55f21172c427aa7894d1d24148b
Signed-off-by: DongHun Kwak <dh0128.kwak@samsung.com>
Diffstat (limited to 'doc/html/boost_asio/overview/rationale.html')
| -rw-r--r-- | doc/html/boost_asio/overview/rationale.html | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/doc/html/boost_asio/overview/rationale.html b/doc/html/boost_asio/overview/rationale.html new file mode 100644 index 0000000000..410c63e049 --- /dev/null +++ b/doc/html/boost_asio/overview/rationale.html @@ -0,0 +1,103 @@ +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> +<title>Rationale</title> +<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> +<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> +<link rel="home" href="../../boost_asio.html" title="Boost.Asio"> +<link rel="up" href="../overview.html" title="Overview"> +<link rel="prev" href="../overview.html" title="Overview"> +<link rel="next" href="core.html" title="Core Concepts and Functionality"> +</head> +<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> +<table cellpadding="2" width="100%"><tr> +<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td> +<td align="center"><a href="../../../../index.html">Home</a></td> +<td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td> +<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> +<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> +<td align="center"><a href="../../../../more/index.htm">More</a></td> +</tr></table> +<hr> +<div class="spirit-nav"> +<a accesskey="p" href="../overview.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../boost_asio.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="core.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> +</div> +<div class="section"> +<div class="titlepage"><div><div><h3 class="title"> +<a name="boost_asio.overview.rationale"></a><a class="link" href="rationale.html" title="Rationale">Rationale</a> +</h3></div></div></div> +<p> + Most programs interact with the outside world in some way, whether it be + via a file, a network, a serial cable, or the console. Sometimes, as is the + case with networking, individual I/O operations can take a long time to complete. + This poses particular challenges to application development. + </p> +<p> + Boost.Asio provides the tools to manage these long running operations, without + requiring programs to use concurrency models based on threads and explicit + locking. + </p> +<p> + The Boost.Asio library is intended for programmers using C++ for systems + programming, where access to operating system functionality such as networking + is often required. In particular, Boost.Asio addresses the following goals: + </p> +<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> +<li class="listitem"> + <span class="bold"><strong>Portability.</strong></span> The library should support + a range of commonly used operating systems, and provide consistent behaviour + across these operating systems. + </li> +<li class="listitem"> + <span class="bold"><strong>Scalability.</strong></span> The library should facilitate + the development of network applications that scale to thousands of concurrent + connections. The library implementation for each operating system should + use the mechanism that best enables this scalability. + </li> +<li class="listitem"> + <span class="bold"><strong>Efficiency.</strong></span> The library should support + techniques such as scatter-gather I/O, and allow programs to minimise + data copying. + </li> +<li class="listitem"> + <span class="bold"><strong>Model concepts from established APIs, such as BSD + sockets.</strong></span> The BSD socket API is widely implemented and understood, + and is covered in much literature. Other programming languages often + use a similar interface for networking APIs. As far as is reasonable, + Boost.Asio should leverage existing practice. + </li> +<li class="listitem"> + <span class="bold"><strong>Ease of use.</strong></span> The library should provide + a lower entry barrier for new users by taking a toolkit, rather than + framework, approach. That is, it should try to minimise the up-front + investment in time to just learning a few basic rules and guidelines. + After that, a library user should only need to understand the specific + functions that are being used. + </li> +<li class="listitem"> + <span class="bold"><strong>Basis for further abstraction.</strong></span> The library + should permit the development of other libraries that provide higher + levels of abstraction. For example, implementations of commonly used + protocols such as HTTP. + </li> +</ul></div> +<p> + Although Boost.Asio started life focused primarily on networking, its concepts + of asynchronous I/O have been extended to include other operating system + resources such as serial ports, file descriptors, and so on. + </p> +</div> +<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> +<td align="left"></td> +<td align="right"><div class="copyright-footer">Copyright © 2003-2017 Christopher M. Kohlhoff<p> + Distributed under the Boost Software License, Version 1.0. (See accompanying + file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) + </p> +</div></td> +</tr></table> +<hr> +<div class="spirit-nav"> +<a accesskey="p" href="../overview.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../boost_asio.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="core.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> +</div> +</body> +</html> |