lock.h
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/*
* Copyright 2002-2014 the original author or authors.
*
* 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
*
* CC/LICENSE
*
* 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.
*/
#ifndef _IVR_LOCK_H_
#define _IVR_LOCK_H_
#include <errno.h>
#include <pthread.h>
#include <semaphore.h>
/**
* @brief 普通锁封装
* detail description
*
*/
class lock_t {
public:
/**
* @brief 构造并加锁
*
* @param [in/out] mutex : pthread_mutex_t&
* @see
* @note
* @author chenyuzhen
* @date 2011/08/28 16:00:51
**/
lock_t(pthread_mutex_t& mutex): _mutex(mutex) {
_locked = (pthread_mutex_lock(&_mutex) == 0);
}
/**
* @brief 释放并解锁
*
* @see
* @note
* @author chenyuzhen
* @date 2011/08/28 16:00:55
**/
~lock_t() {
pthread_mutex_unlock(&_mutex);
}
/**
* @brief 返回是否加锁
*
* @return bool
* @retval
* @see
* @note
* @author chenyuzhen
* @date 2011/08/28 16:00:58
**/
bool locked() const {
return _locked;
}
private:
pthread_mutex_t& _mutex; ///< 锁对象
bool _locked; ///<是否加锁
};
/**
* @brief 读写锁封装
* detail description
*
*/
class rw_lock_t {
public:
/**
* @brief 构造并加锁
*
* @param [in/out] mutex : pthread_mutex_t&
* @param [in/out] write : bool
* @see
* @note
* @author chenyuzhen
* @date 2011/08/28 14:54:44
**/
rw_lock_t(pthread_rwlock_t& mutex, bool write = false): _mutex(mutex), _locked(false) {
if (write) {
_locked = (pthread_rwlock_wrlock(&_mutex) == 0);
} else {
_locked = (pthread_rwlock_rdlock(&_mutex) == 0);
}
}
/**
* @brief 析构并解锁
*
* @see
* @note
* @author chenyuzhen
* @date 2011/08/28 14:54:49
**/
~rw_lock_t() {
pthread_rwlock_unlock(&_mutex);
_locked = false;
}
/**
* @brief 判断是否加锁成功
*
* @return bool
* @retval
* @see
* @note
* @author chenyuzhen
* @date 2011/08/28 14:57:36
**/
bool locked() const {
return _locked;
}
private:
pthread_rwlock_t& _mutex; ///<锁
bool _locked; ///<是否加锁
};
class sem_lock_t {
public:
sem_lock_t(sem_t* sem): _sem(sem) {
}
bool wait()const {
int32_t ret = 0;
do {
ret = sem_wait(_sem);
} while (-1 == ret && EINTR == errno);
return 0 == ret;
}
bool post()const {
int32_t ret = 0;
do {
ret = sem_post(_sem);
} while (-1 == ret && EINTR == errno);
return 0 == ret;
}
private:
mutable sem_t* _sem;
};
#endif