qpid/sys/posix/Mutex.h Source File

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qpid/sys/posix/Mutex.h
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    00001 #ifndef _sys_posix_Mutex_h
    00002 #define _sys_posix_Mutex_h
    00003
    00004 /*
    00005  *
    00006  * Copyright (c) 2006 The Apache Software Foundation
    00007  *
    00008  * Licensed under the Apache License, Version 2.0 (the "License");
    00009  * you may not use this file except in compliance with the License.
    00010  * You may obtain a copy of the License at
    00011  *
    00012  *    http://www.apache.org/licenses/LICENSE-2.0
    00013  *
    00014  * Unless required by applicable law or agreed to in writing, software
    00015  * distributed under the License is distributed on an "AS IS" BASIS,
    00016  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    00017  * See the License for the specific language governing permissions and
    00018  * limitations under the License.
    00019  *
    00020  */
    00021
    00022 #include "qpid/sys/posix/check.h"
    00023
    00024 #include <pthread.h>
    00025 #include <boost/noncopyable.hpp>
    00026
    00027 namespace qpid {
    00028 namespace sys {
    00029
    00030 class Condition;
    00031
    00035 class Mutex : private boost::noncopyable {
    00036     friend class Condition;
    00037     static const pthread_mutexattr_t* getAttribute();
    00038
    00039 public:
    00040     typedef ::qpid::sys::ScopedLock<Mutex> ScopedLock;
    00041     typedef ::qpid::sys::ScopedUnlock<Mutex> ScopedUnlock;
    00042
    00043     inline Mutex();
    00044     inline ~Mutex();
    00045     inline void lock();
    00046     inline void unlock();
    00047     inline bool trylock();
    00048
    00049
    00050 protected:
    00051     pthread_mutex_t mutex;
    00052 };
    00053
    00057 class RWlock : private boost::noncopyable {
    00058     friend class Condition;
    00059
    00060 public:
    00061     typedef ::qpid::sys::ScopedRlock<RWlock> ScopedRlock;
    00062     typedef ::qpid::sys::ScopedWlock<RWlock> ScopedWlock;
    00063
    00064     inline RWlock();
    00065     inline ~RWlock();
    00066     inline void wlock();  // will write-lock
    00067     inline void rlock();  // will read-lock
    00068     inline void unlock();
    00069     inline void trywlock();  // will write-try
    00070     inline void tryrlock();  // will read-try
    00071
    00072 protected:
    00073     pthread_rwlock_t rwlock;
    00074 };
    00075
    00076
    00081 struct PODMutex
    00082 {
    00083     typedef ::qpid::sys::ScopedLock<PODMutex> ScopedLock;
    00084
    00085     inline void lock();
    00086     inline void unlock();
    00087     inline bool trylock();
    00088
    00089     // Must be public to be a POD:
    00090     pthread_mutex_t mutex;
    00091 };
    00092
    00093 #define QPID_MUTEX_INITIALIZER { PTHREAD_MUTEX_INITIALIZER }
    00094
    00095 void PODMutex::lock() {
    00096     QPID_POSIX_ASSERT_THROW_IF(pthread_mutex_lock(&mutex));
    00097 }
    00098
    00099 void PODMutex::unlock() {
    00100     QPID_POSIX_ASSERT_THROW_IF(pthread_mutex_unlock(&mutex));
    00101 }
    00102
    00103 bool PODMutex::trylock() {
    00104     return pthread_mutex_trylock(&mutex) == 0;
    00105 }
    00106
    00107 Mutex::Mutex() {
    00108     QPID_POSIX_ASSERT_THROW_IF(pthread_mutex_init(&mutex, getAttribute()));
    00109 }
    00110
    00111 Mutex::~Mutex(){
    00112     QPID_POSIX_ABORT_IF(pthread_mutex_destroy(&mutex));
    00113 }
    00114
    00115 void Mutex::lock() {
    00116     QPID_POSIX_ASSERT_THROW_IF(pthread_mutex_lock(&mutex));
    00117 }
    00118
    00119 void Mutex::unlock() {
    00120     QPID_POSIX_ASSERT_THROW_IF(pthread_mutex_unlock(&mutex));
    00121 }
    00122
    00123 bool Mutex::trylock() {
    00124     return pthread_mutex_trylock(&mutex) == 0;
    00125 }
    00126
    00127
    00128 RWlock::RWlock() {
    00129     QPID_POSIX_ASSERT_THROW_IF(pthread_rwlock_init(&rwlock, NULL));
    00130 }
    00131
    00132 RWlock::~RWlock(){
    00133     QPID_POSIX_ABORT_IF(pthread_rwlock_destroy(&rwlock));
    00134 }
    00135
    00136 void RWlock::wlock() {
    00137     QPID_POSIX_ASSERT_THROW_IF(pthread_rwlock_wrlock(&rwlock));
    00138 }
    00139
    00140 void RWlock::rlock() {
    00141     QPID_POSIX_ASSERT_THROW_IF(pthread_rwlock_rdlock(&rwlock));
    00142 }
    00143
    00144 void RWlock::unlock() {
    00145     QPID_POSIX_ASSERT_THROW_IF(pthread_rwlock_unlock(&rwlock));
    00146 }
    00147
    00148 void RWlock::trywlock() {
    00149     QPID_POSIX_ASSERT_THROW_IF(pthread_rwlock_trywrlock(&rwlock));
    00150 }
    00151
    00152 void RWlock::tryrlock() {
    00153     QPID_POSIX_ASSERT_THROW_IF(pthread_rwlock_tryrdlock(&rwlock));
    00154 }
    00155
    00156
    00157 }}
    00158 #endif