#include "c_mutex.h"



//將鎖進行初始化

void c_mutex::init()

{

        pthread_mutexattr_t _attr;



        pthread_mutexattr_init(&_attr);

		pthread_mutexattr_setpshared( &_attr, PTHREAD_PROCESS_SHARED );


        pthread_mutex_init(_mutex, &_attr);

        pthread_mutexattr_destroy(&_attr);

}



//1-鎖成功  0--未成功

bool c_mutex::tryEnterMutex(void)

{

        return (pthread_mutex_trylock(_mutex) == 0) ? true : false;

}



void c_mutex::enterMutex(void)

{

        pthread_mutex_lock(_mutex);

}



void c_mutex::leaveMutex(void)

{

        pthread_mutex_unlock(_mutex);

}



c_mutex::c_mutex()

{



}





c_mutex::~c_mutex()

{

//pthread_mutex_destroy(_mutex);

}


bool c_mutex::unlockMutex(int times)
{
	int i;
	for( i = 0; i < times; i++)
	{
		if( tryEnterMutex() == 1 )
		{
			break;
		}
		else
		{
			sleep(1);
		}
	}
	leaveMutex();
	return true;
}