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int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr);
int pthread_mutex_lock(pthread_mutex_t *mutex);
int pthread_mutex_unlock(pthread_mutex_t *mutex);
int pthread_mutex_destroy(pthread_mutex_t *mutex);

//用于pthread系列函数的返回值检查
#define TINY_CHECK(exp) \if(!(exp)) \{   \fprintf(stderr, "File:%s, Line:%d Exp:[" #exp "] is true, abort.\n", __FILE__, __LINE__); abort();\}

#ifndef MUTEXLOCK_H
#define MUTEXLOCK_H#include "NonCopyable.h"
//#include <boost/noncopyable.hpp>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>//用于pthread系列函数的返回值检查
#define TINY_CHECK(exp) \if(!(exp)) \{   \fprintf(stderr, "File:%s, Line:%d Exp:[" #exp "] is true, abort.\n", __FILE__, __LINE__); abort();\}class MutexLock : NonCopyable
{friend class Condition;
public:MutexLock();~MutexLock();void lock();void unlock();bool isLocking() const { return isLocking_; }pthread_mutex_t *getMutexPtr() //思考为什么不是const{ return &mutex_; } private:void restoreMutexStatus() //提供给Condition的wait使用{ isLocking_ = true; }pthread_mutex_t mutex_;bool isLocking_; //是否上锁
};class MutexLockGuard : NonCopyable
{
public:MutexLockGuard(MutexLock &mutex) :mutex_(mutex){ mutex_.lock(); }~MutexLockGuard(){ mutex_.unlock(); }
private:MutexLock &mutex_;
};#endif //MUTEXLOCK_H

#include "MutexLock.h"
#include <assert.h>MutexLock::MutexLock():isLocking_(false)
{TINY_CHECK(!pthread_mutex_init(&mutex_, NULL));
}MutexLock::~MutexLock()
{assert(!isLocking());//确保解锁TINY_CHECK(!pthread_mutex_destroy(&mutex_));
}void MutexLock::lock()
{TINY_CHECK(!pthread_mutex_lock(&mutex_));isLocking_ = true;
}void MutexLock::unlock()
{isLocking_ = false;TINY_CHECK(!pthread_mutex_unlock(&mutex_));
}