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libzmq master
The Intelligent Transport Layer
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00001 /* 00002 Copyright (c) 2009-2011 250bpm s.r.o. 00003 Copyright (c) 2007-2009 iMatix Corporation 00004 Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file 00005 00006 This file is part of 0MQ. 00007 00008 0MQ is free software; you can redistribute it and/or modify it under 00009 the terms of the GNU Lesser General Public License as published by 00010 the Free Software Foundation; either version 3 of the License, or 00011 (at your option) any later version. 00012 00013 0MQ is distributed in the hope that it will be useful, 00014 but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00016 GNU Lesser General Public License for more details. 00017 00018 You should have received a copy of the GNU Lesser General Public License 00019 along with this program. If not, see <http://www.gnu.org/licenses/>. 00020 */ 00021 00022 #ifndef __ZMQ_MAILBOX_HPP_INCLUDED__ 00023 #define __ZMQ_MAILBOX_HPP_INCLUDED__ 00024 00025 #include <stddef.h> 00026 00027 #include "platform.hpp" 00028 #include "signaler.hpp" 00029 #include "fd.hpp" 00030 #include "config.hpp" 00031 #include "command.hpp" 00032 #include "ypipe.hpp" 00033 #include "mutex.hpp" 00034 00035 namespace zmq 00036 { 00037 00038 class mailbox_t 00039 { 00040 public: 00041 00042 mailbox_t (); 00043 ~mailbox_t (); 00044 00045 fd_t get_fd (); 00046 void send (const command_t &cmd_); 00047 int recv (command_t *cmd_, int timeout_); 00048 00049 private: 00050 00051 // The pipe to store actual commands. 00052 typedef ypipe_t <command_t, command_pipe_granularity> cpipe_t; 00053 cpipe_t cpipe; 00054 00055 // Signaler to pass signals from writer thread to reader thread. 00056 signaler_t signaler; 00057 00058 // There's only one thread receiving from the mailbox, but there 00059 // is arbitrary number of threads sending. Given that ypipe requires 00060 // synchronised access on both of its endpoints, we have to synchronise 00061 // the sending side. 00062 mutex_t sync; 00063 00064 // True if the underlying pipe is active, ie. when we are allowed to 00065 // read commands from it. 00066 bool active; 00067 00068 // Disable copying of mailbox_t object. 00069 mailbox_t (const mailbox_t&); 00070 const mailbox_t &operator = (const mailbox_t&); 00071 }; 00072 00073 } 00074 00075 #endif