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libzmq master
The Intelligent Transport Layer
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00001 /* 00002 Copyright (c) 2010-2011 250bpm s.r.o. 00003 Copyright (c) 2010-2011 Other contributors as noted in the AUTHORS file 00004 00005 This file is part of 0MQ. 00006 00007 0MQ is free software; you can redistribute it and/or modify it under 00008 the terms of the GNU Lesser General Public License as published by 00009 the Free Software Foundation; either version 3 of the License, or 00010 (at your option) any later version. 00011 00012 0MQ is distributed in the hope that it will be useful, 00013 but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 GNU Lesser General Public License for more details. 00016 00017 You should have received a copy of the GNU Lesser General Public License 00018 along with this program. If not, see <http://www.gnu.org/licenses/>. 00019 */ 00020 00021 #ifndef __ZMQ_SIGNALER_HPP_INCLUDED__ 00022 #define __ZMQ_SIGNALER_HPP_INCLUDED__ 00023 00024 #include "fd.hpp" 00025 00026 namespace zmq 00027 { 00028 00029 // This is a cross-platform equivalent to signal_fd. However, as opposed 00030 // to signal_fd there can be at most one signal in the signaler at any 00031 // given moment. Attempt to send a signal before receiving the previous 00032 // one will result in undefined behaviour. 00033 00034 class signaler_t 00035 { 00036 public: 00037 00038 signaler_t (); 00039 ~signaler_t (); 00040 00041 fd_t get_fd (); 00042 void send (); 00043 int wait (int timeout_); 00044 void recv (); 00045 00046 private: 00047 00048 // Creates a pair of filedescriptors that will be used 00049 // to pass the signals. 00050 static int make_fdpair (fd_t *r_, fd_t *w_); 00051 00052 // Underlying write & read file descriptor. 00053 fd_t w; 00054 fd_t r; 00055 00056 // Disable copying of signaler_t object. 00057 signaler_t (const signaler_t&); 00058 const signaler_t &operator = (const signaler_t&); 00059 }; 00060 00061 } 00062 00063 #endif