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#ifndef _sys_apr_Mutex_h
#define _sys_apr_Mutex_h
/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include "qpid/sys/apr/APRBase.h"
#include "qpid/sys/apr/APRPool.h"
#include <boost/noncopyable.hpp>
#include <apr_thread_mutex.h>
namespace qpid {
namespace sys {
class Condition;
/**
* Mutex lock.
*/
class Mutex : private boost::noncopyable {
public:
typedef ScopedLock<Mutex> ScopedLock;
typedef ScopedUnlock<Mutex> ScopedUnlock;
inline Mutex();
inline ~Mutex();
inline void lock();
inline void unlock();
inline bool trylock();
protected:
apr_thread_mutex_t* mutex;
friend class Condition;
};
Mutex::Mutex() {
CHECK_APR_SUCCESS(apr_thread_mutex_create(&mutex, APR_THREAD_MUTEX_NESTED, APRPool::get()));
}
Mutex::~Mutex(){
CHECK_APR_SUCCESS(apr_thread_mutex_destroy(mutex));
}
void Mutex::lock() {
CHECK_APR_SUCCESS(apr_thread_mutex_lock(mutex));
}
void Mutex::unlock() {
CHECK_APR_SUCCESS(apr_thread_mutex_unlock(mutex));
}
bool Mutex::trylock() {
return apr_thread_mutex_trylock(mutex) == 0;
}
/**
* RW lock.
*/
class RWlock : private boost::noncopyable {
friend class Condition;
public:
typedef ScopedRlock<RWlock> ScopedRlock;
typedef ScopedWlock<RWlock> ScopedWlock;
inline RWlock();
inline ~RWlock();
inline void wlock(); // will write-lock
inline void rlock(); // will read-lock
inline void unlock();
inline bool trywlock(); // will write-try
inline bool tryrlock(); // will read-try
protected:
apr_thread_mutex_t* mutex;
};
RWlock::RWlock() {
CHECK_APR_SUCCESS(apr_thread_mutex_create(&mutex, APR_THREAD_MUTEX_NESTED, APRPool::get()));
}
RWlock::~RWlock(){
CHECK_APR_SUCCESS(apr_thread_mutex_destroy(mutex));
}
void RWlock::wlock() {
CHECK_APR_SUCCESS(apr_thread_mutex_lock(mutex));
}
void RWlock::rlock() {
CHECK_APR_SUCCESS(apr_thread_mutex_lock(mutex));
}
void RWlock::unlock() {
CHECK_APR_SUCCESS(apr_thread_mutex_unlock(mutex));
}
bool RWlock::trywlock() {
return apr_thread_mutex_trylock(mutex) == 0;
}
bool RWlock::tryrlock() {
return apr_thread_mutex_trylock(mutex) == 0;
}
}}
#endif /*!_sys_apr_Mutex_h*/
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