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lock.h
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executable file
·84 lines (75 loc) · 1.87 KB
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/**************************************************
* 该类主要是对mutex进行了RAII封装，以后还会封装condition,
* 目的当然是为了便于编程使用啊
* 用法：
* MutexLock mutex;//定义一个mutex
*
* void foo(){
...
* MutexGuard lock(mutex);
* ...
* do something...
* ...
* }
* lock 只在它的作用域内有效
**************************************************/
#ifndef LOCK_H_
#define LOCK_H_
#include <pthread.h>
/************************************************
* mutex api的简单封装
*************************************************/
class MutexLock{
public:
MutexLock(){
pthread_mutex_init(&mutex_, NULL);
}
~MutexLock(){
pthread_mutex_destroy(&mutex_);
}
void Lock(){
pthread_mutex_lock(&mutex_);
}
void UnLock(){
pthread_mutex_unlock(&mutex_);
}
private:
pthread_mutex_t mutex_;
private:
//禁止copy
MutexLock(const MutexLock &);
MutexLock &operator=(const MutexLock &);
};
/************************************************
* 只是简单的对mutex做RAII封装
* use:
* void foo(){
* MutexGuard lock(mutex);
* ...
* do something...
* ...
* }
*************************************************/
class MutexGuard{
public:
//explicit 防止隐式转换
explicit MutexGuard(MutexLock &mutex):mutex_(mutex){//引用只能用
//mutex_ = mutex;
mutex_.Lock();
}
~MutexGuard(){
mutex_.UnLock();
}
private:
MutexLock &mutex_;//由于mutexLock不允许拷贝，所以用引用
private:
//禁止copy
MutexGuard(const MutexGuard &);
MutexGuard &operator=(const MutexGuard &);
};
// 见陈硕的muduo网络库实现
#define MutexGuard(x) do{\
fprintf(stderr, "Error:line:%d, function:%s(), file:%s\nthis should be used like this:\nMutexGuard lock(your_mutex);\n",\
__LINE__, __FUNCTION__, __FILE__);\
}while(0);
#endif