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qpid/sys/posix/Condition.h
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00001 #ifndef _sys_posix_Condition_h
00002 #define _sys_posix_Condition_h
00003 
00004 /*
00005  *
00006  * Licensed to the Apache Software Foundation (ASF) under one
00007  * or more contributor license agreements.  See the NOTICE file
00008  * distributed with this work for additional information
00009  * regarding copyright ownership.  The ASF licenses this file
00010  * to you under the Apache License, Version 2.0 (the
00011  * "License"); you may not use this file except in compliance
00012  * with the License.  You may obtain a copy of the License at
00013  *
00014  *   http://www.apache.org/licenses/LICENSE-2.0
00015  *
00016  * Unless required by applicable law or agreed to in writing,
00017  * software distributed under the License is distributed on an
00018  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
00019  * KIND, either express or implied.  See the License for the
00020  * specific language governing permissions and limitations
00021  * under the License.
00022  *
00023  */
00024 
00025 #include "qpid/sys/posix/PrivatePosix.h"
00026 
00027 #include "qpid/sys/Mutex.h"
00028 #include "qpid/sys/Time.h"
00029 
00030 #include <time.h>
00031 #include <sys/errno.h>
00032 #include <boost/noncopyable.hpp>
00033 
00034 namespace qpid {
00035 namespace sys {
00036 
00040 class Condition
00041 {
00042   public:
00043     inline Condition();
00044     inline ~Condition();
00045     inline void wait(Mutex&);
00046     inline bool wait(Mutex&, const AbsTime& absoluteTime);
00047     inline void notify();
00048     inline void notifyAll();
00049 
00050   private:
00051     pthread_cond_t condition;
00052 };
00053 
00054 Condition::Condition() {
00055     QPID_POSIX_ASSERT_THROW_IF(pthread_cond_init(&condition, 0));
00056 }
00057 
00058 Condition::~Condition() {
00059     QPID_POSIX_ABORT_IF(pthread_cond_destroy(&condition));
00060 }
00061 
00062 void Condition::wait(Mutex& mutex) {
00063     QPID_POSIX_ASSERT_THROW_IF(pthread_cond_wait(&condition, &mutex.mutex));
00064 }
00065 
00066 bool Condition::wait(Mutex& mutex, const AbsTime& absoluteTime){
00067     struct timespec ts;
00068     toTimespec(ts, Duration(EPOCH, absoluteTime));
00069     int status = pthread_cond_timedwait(&condition, &mutex.mutex, &ts);
00070     if (status != 0) {
00071         if (status == ETIMEDOUT) return false;
00072         throw QPID_POSIX_ERROR(status);
00073     }
00074     return true;
00075 }
00076 
00077 void Condition::notify(){
00078     QPID_POSIX_ASSERT_THROW_IF(pthread_cond_signal(&condition));
00079 }
00080 
00081 void Condition::notifyAll(){
00082     QPID_POSIX_ASSERT_THROW_IF(pthread_cond_broadcast(&condition));
00083 }
00084 
00085 }}
00086 #endif  

Qpid C++ API Reference
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