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Diffstat (limited to 'src/router.hpp')
| -rw-r--r-- | src/router.hpp | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/router.hpp b/src/router.hpp new file mode 100644 index 0000000..f976655 --- /dev/null +++ b/src/router.hpp @@ -0,0 +1,138 @@ +/* + Copyright (c) 2009-2011 250bpm s.r.o. + Copyright (c) 2011 iMatix Corporation + Copyright (c) 2011 VMware, Inc. + Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file + + This file is part of 0MQ. + + 0MQ is free software; you can redistribute it and/or modify it under + the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + 0MQ is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef __ZMQ_ROUTER_HPP_INCLUDED__ +#define __ZMQ_ROUTER_HPP_INCLUDED__ + +#include <map> + +#include "socket_base.hpp" +#include "session_base.hpp" +#include "stdint.hpp" +#include "blob.hpp" +#include "msg.hpp" +#include "fq.hpp" + +namespace zmq +{ + + class ctx_t; + class pipe_t; + + // TODO: This class uses O(n) scheduling. Rewrite it to use O(1) algorithm. + class router_t : + public socket_base_t + { + public: + + router_t (zmq::ctx_t *parent_, uint32_t tid_, int sid); + ~router_t (); + + // Overloads of functions from socket_base_t. + void xattach_pipe (zmq::pipe_t *pipe_, bool icanhasall_); + int xsetsockopt (int option_, const void *optval_, size_t optvallen_); + int xsend (msg_t *msg_, int flags_); + int xrecv (msg_t *msg_, int flags_); + bool xhas_in (); + bool xhas_out (); + void xread_activated (zmq::pipe_t *pipe_); + void xwrite_activated (zmq::pipe_t *pipe_); + void xterminated (zmq::pipe_t *pipe_); + + protected: + + // Rollback any message parts that were sent but not yet flushed. + int rollback (); + + private: + + // Receive peer id and update lookup map + bool identify_peer (pipe_t *pipe_); + + // Fair queueing object for inbound pipes. + fq_t fq; + + // True iff there is a message held in the pre-fetch buffer. + bool prefetched; + + // If true, the receiver got the message part with + // the peer's identity. + bool identity_sent; + + // Holds the prefetched identity. + msg_t prefetched_id; + + // Holds the prefetched message. + msg_t prefetched_msg; + + // If true, more incoming message parts are expected. + bool more_in; + + struct outpipe_t + { + zmq::pipe_t *pipe; + bool active; + }; + + // We keep a set of pipes that have not been identified yet. + std::set <pipe_t*> anonymous_pipes; + + // Outbound pipes indexed by the peer IDs. + typedef std::map <blob_t, outpipe_t> outpipes_t; + outpipes_t outpipes; + + // The pipe we are currently writing to. + zmq::pipe_t *current_out; + + // If true, more outgoing message parts are expected. + bool more_out; + + // Peer ID are generated. It's a simple increment and wrap-over + // algorithm. This value is the next ID to use (if not used already). + uint32_t next_peer_id; + + // If true, report EAGAIN to the caller instead of silently dropping + // the message targeting an unknown peer. + bool mandatory; + + router_t (const router_t&); + const router_t &operator = (const router_t&); + }; + + class router_session_t : public session_base_t + { + public: + + router_session_t (zmq::io_thread_t *io_thread_, bool connect_, + socket_base_t *socket_, const options_t &options_, + const address_t *addr_); + ~router_session_t (); + + private: + + router_session_t (const router_session_t&); + const router_session_t &operator = (const router_session_t&); + }; + +} + +#endif |