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#ifndef _sys_Mutex_h
#define _sys_Mutex_h
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*
*/
#ifdef USE_APR
# include <apr_thread_mutex.h>
# include <apr_pools.h>
# include "apr/APRBase.h"
# include "apr/APRPool.h"
#else
# include <pthread.h>
# include <posix/check.h>
#endif
#include <boost/noncopyable.hpp>
namespace qpid {
namespace sys {
/**
* Scoped lock template: calls lock() in ctor, unlock() in dtor.
* L can be any class with lock() and unlock() functions.
*/
template <class L>
class ScopedLock
{
public:
ScopedLock(L& l) : mutex(l) { l.lock(); }
~ScopedLock() { mutex.unlock(); }
private:
L& mutex;
};
/**
* Mutex lock.
*/
class Mutex : private boost::noncopyable {
public:
typedef ScopedLock<Mutex> ScopedLock;
inline Mutex();
inline ~Mutex();
inline void lock();
inline void unlock();
inline void trylock();
protected:
#ifdef USE_APR
apr_thread_mutex_t* mutex;
apr_pool_t* pool;
#else
pthread_mutex_t mutex;
#endif
};
#ifdef USE_APR
// APR ================================================================
Mutex::Mutex() {
pool = APRPool::get();
CHECK_APR_SUCCESS(apr_thread_mutex_create(&mutex, APR_THREAD_MUTEX_NESTED, pool));
}
Mutex::~Mutex(){
CHECK_APR_SUCCESS(apr_thread_mutex_destroy(mutex));
APRPool::free(pool);
}
void Mutex::lock() {
CHECK_APR_SUCCESS(apr_thread_mutex_lock(mutex));
}
void Mutex::unlock() {
CHECK_APR_SUCCESS(apr_thread_mutex_unlock(mutex));
}
void Mutex::trylock() {
CHECK_APR_SUCCESS(apr_thread_mutex_trylock(mutex));
}
#else
// POSIX ================================================================
/**
* PODMutex is a POD, can be static-initialized with
* PODMutex m = QPID_PODMUTEX_INITIALIZER
*/
struct PODMutex
{
typedef ScopedLock<PODMutex> ScopedLock;
inline void lock();
inline void unlock();
inline void trylock();
// Must be public to be a POD:
pthread_mutex_t mutex;
};
#define QPID_MUTEX_INITIALIZER { PTHREAD_MUTEX_INITIALIZER }
void PODMutex::lock() {
QPID_POSIX_THROW_IF(pthread_mutex_lock(&mutex));
}
void PODMutex::unlock() {
QPID_POSIX_THROW_IF(pthread_mutex_unlock(&mutex));
}
void PODMutex::trylock() {
QPID_POSIX_THROW_IF(pthread_mutex_trylock(&mutex));
}
Mutex::Mutex() {
QPID_POSIX_THROW_IF(pthread_mutex_init(&mutex, 0));
}
Mutex::~Mutex(){
QPID_POSIX_THROW_IF(pthread_mutex_destroy(&mutex));
}
void Mutex::lock() {
QPID_POSIX_THROW_IF(pthread_mutex_lock(&mutex));
}
void Mutex::unlock() {
QPID_POSIX_THROW_IF(pthread_mutex_unlock(&mutex));
}
void Mutex::trylock() {
QPID_POSIX_THROW_IF(pthread_mutex_trylock(&mutex));
}
#endif // USE_APR
}}
#endif /*!_sys_Mutex_h*/
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