linux C 多线程编程（互斥量）实例

实现多线程编程下互斥地访问同一个变量！

参考代码：

/*************************************************************************
  > File Name: thread_exap.c
  > Author: xiao5
  > Mail: [email protected] 
  > Created Time: Sun 12 Jun 2016 04:19:01 PM CST
 ************************************************************************/

#include<stdio.h>
#include<pthread.h>
#include<sys/time.h>
#include<string.h>
#define MAX 10

pthread_t thread[2];
pthread_mutex_t mut;
int number = 0, i;

void *thread1()
{
	printf("Thread1: I'am thread 1\n");

	for(i = 0; i < MAX; i++)
	{
		printf("Thread1: number = %d\n", number);
		pthread_mutex_lock(&mut);
		number++;
		pthread_mutex_unlock(&mut);
		sleep(2);
	}

	printf("Thread1:主函数在等待我完成任务吗？\n");
	pthread_exit(NULL);
}

void *thread2()
{
	printf("Thread2: I'am thread2\n");

	for(i = 0; i < MAX; i++)
	{
		printf("Thread2: number = %d\n", number);
		pthread_mutex_lock(&mut);
		number++;
		pthread_mutex_unlock(&mut);
		sleep(3);
	}

	printf("Thread2: 主函数在等待我完成任务吗？\n");
	pthread_exit(NULL);
}

void thread_create(void)
{
	int temp;
	memset(&thread, 0, sizeof(thread));

	if((temp = pthread_create(&thread[0], NULL, thread1, NULL)) != 0)
		printf("线程1创建失败！\n");
	else
		printf("线程1创建成功！\n");

	if((temp = pthread_create(&thread[1], NULL, thread2, NULL)) != 0)
		printf("线程2创建失败！\n");
	else
		printf("线程2创建成功！\n");
}

void thread_wait(void)
{
	/* 等待线程结束 */
	if(thread[0] != 0)
	{
		pthread_join(thread[0], NULL);
		printf("线程1已经结束\n");
	}
	if(thread[1] != 0)
	{
		pthread_join(thread[1], NULL);
		printf("线程2已经结束\n");
	}
}


int main()
{
	pthread_mutex_init(&mut, NULL);

	printf("我是主函数哦，我正在创建线程～\n");
	thread_create();
	printf("我是主函数哦，我正在等待线程完成任务\n");
	thread_wait();

	return 0;
}

编译执行后的结果如下：