Linux多线程之线程互斥（互斥锁）

什么是线程互斥？

初始化互斥锁：

int pthread_mutex_init(pthread_mutex_t * restrict mutex, const pthread_mutexattr_t * restrict attr);

获取互斥锁：

int pthread_mutex_lock(pthread_mutex_t * mutex);

释放互斥锁：

int pthread_mutex_unlock(pthread_mutex_t * mutex);

多人垒墙实例：

#include 
#include 


pthread_t thread[2];

int number = 0;

pthread_mutex_t mut;//互斥锁

void* work1()
{
	int i = 0;
	
	printf("i am work1\n");
	
	for(i=0; i<10; i++)
	{
		pthread_mutex_lock(&mut);//加锁
		
		number++;
		
		pthread_mutex_unlock(&mut);//解锁
		
		printf("work1 number is %d\n", number);
		
		sleep(1);
	}
	
	pthread_exit(NULL);
}

void* work2()
{
	int i = 0;
	
	printf("i am work2\n");
	
	for(i=0; i<10; i++)
	{
		pthread_mutex_lock(&mut);//加锁
		
		number++;
		
		pthread_mutex_unlock(&mut);//解锁
		
		printf("work2 number is %d\n", number);
		
		sleep(1);
	}
	
	pthread_exit(NULL);
}

int main()
{
	pthread_mutex_init(&mut, NULL);//初始化锁
	
	//创建工人1线程
	pthread_create(&thread[0], NULL, work1,  NULL);
	
	
	//创建工人2线程
	pthread_create(&thread[1], NULL, work2,  NULL);

	
	//等待工人1线程的结束
	pthread_join(thread[0], NULL);
	
	//等待工人2线程的结束
	pthread_join(thread[1], NULL);

	
	return 0;
}

运行结果：