pthread_mutex_t封装

常常需要使用pthread_mutex线程同步，每次都要使用pthread_mutex_init, pthread_mutex_lock, pthread_unlock, pthread_mutex_destroy这几个函数，干脆封装一下，以便以后重用。

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-->//Mutex.cpp
#include <pthread.h>
#include <iostream>
using namespace std;

class ThreadMutex
{
public:
    ThreadMutex()
    {
        pthread_mutex_init(&mtx, NULL);
    }
    
    ~ThreadMutex()
    {
        pthread_mutex_destroy( &mtx );
    }
    
    inline void Lock()
    {
        pthread_mutex_lock( &mtx );
    }
    
    inline void UnLock()
    {
        pthread_mutex_unlock( &mtx );
    }
    
private:
    pthread_mutex_t mtx;
};                                                            

//以下为测试用例
ThreadMutex g_Mutex;

void *PrintMsg(void *lpPara)
{
    char *msg = (char *)lpPara;

    g_Mutex.Lock();

    for(int i=0; i< 5; i++ )
    {
        cout << msg << endl;
        sleep( 1 );
    }

    g_Mutex.UnLock();

    return NULL;
}

int main()
{
    pthread_t t1,t2;

    //创建两个工作线程，第1个线程打印10个1，第2个线程打印10个2。
    pthread_create( &t1, NULL, &PrintMsg, (void *)"First print thread" );       
    pthread_create( &t2, NULL, &PrintMsg, (void *)"Second print thread" );        

    //等待线程结束                                             
    pthread_join( t1, NULL);                               
    pthread_join( t2, NULL);                               

    return 0;                                             
}    

转载自：http://www.cppblog.com/bujiwu/archive/2009/11/08/pthread_mutex.html