00001 /* 00002 * IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. By 00003 * downloading, copying, installing or using the software you agree to 00004 * this license. If you do not agree to this license, do not download, 00005 * install, copy or use the software. 00006 * 00007 * Intel Open Source License 00008 * 00009 * Copyright (c) 2004 Intel Corporation. All rights reserved. 00010 * 00011 * Redistribution and use in source and binary forms, with or without 00012 * modification, are permitted provided that the following conditions are 00013 * met: 00014 * 00015 * Redistributions of source code must retain the above copyright 00016 * notice, this list of conditions and the following disclaimer. 00017 * 00018 * Redistributions in binary form must reproduce the above copyright 00019 * notice, this list of conditions and the following disclaimer in the 00020 * documentation and/or other materials provided with the distribution. 00021 * 00022 * Neither the name of the Intel Corporation nor the names of its 00023 * contributors may be used to endorse or promote products derived from 00024 * this software without specific prior written permission. 00025 * 00026 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00027 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00028 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00029 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE INTEL OR 00030 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00031 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00032 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00033 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00034 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00035 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00036 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00037 */ 00038 00039 #ifndef _OASYS_MSG_QUEUE_H_ 00040 #define _OASYS_MSG_QUEUE_H_ 00041 00042 #include <queue> 00043 #include <unistd.h> 00044 #include <errno.h> 00045 #include <sys/poll.h> 00046 00047 #include "Notifier.h" 00048 #include "SpinLock.h" 00049 #include "../debug/Log.h" 00050 #include "../debug/DebugUtils.h" 00051 00052 namespace oasys { 00053 00059 template<typename _elt_t> 00060 class MsgQueue : public Notifier { 00061 public: 00065 MsgQueue(const char* logpath, SpinLock* lock = NULL); 00066 00070 ~MsgQueue(); 00071 00076 void push(_elt_t msg, bool at_back = true); 00077 00082 void push_front(_elt_t msg) 00083 { 00084 push(msg, false); 00085 } 00086 00091 void push_back(_elt_t msg) 00092 { 00093 push(msg, true); 00094 } 00095 00099 _elt_t pop_blocking(); 00100 00105 bool try_pop(_elt_t* eltp); 00106 00110 size_t size() 00111 { 00112 ScopeLock l(lock_, "MsgQueue::size"); 00113 return queue_.size(); 00114 } 00115 00128 void notify_when_empty(); 00129 00130 protected: 00131 SpinLock* lock_; 00132 std::deque<_elt_t> queue_; 00133 bool notify_when_empty_; 00134 }; 00135 00136 #include "MsgQueue.tcc" 00137 00138 } // namespace oasys 00139 00140 #endif //_OASYS_MSG_QUEUE_H_