多线程同步锁实例【转载】

原文：http://www.cnblogs.com/wangkangluo1/archive/2011/06/16/2082287.html

#include <pthread.h>
#include <stdio.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'm 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 :主函数在等我完成任务吗？\n");

    pthread_exit(NULL);

}

void *thread2()
{
    printf("thread2 : I'm thread 2\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 :主函数在等我完成任务吗？\n");
    pthread_exit(NULL);
}


void thread_create(void)
{
    int temp;
    memset(&thread, 0, sizeof(thread)); //comment1
    //创建线程
    if((temp = pthread_create(&thread[0], NULL, thread1, NULL)) != 0) //comment2
        printf("线程1创建失败!\n");
    else
        printf("线程1被创建\n");
    if((temp = pthread_create(&thread[1], NULL, thread2, NULL)) != 0) //comment3
        printf("线程2创建失败");
    else
        printf("线程2被创建\n");
}

void thread_wait(void)
{
    //等待线程结束
    if(thread[0] !=0) { //comment4
        pthread_join(thread[0],NULL);
        printf("线程1已经结束\n");
    }
    if(thread[1] !=0) { //comment5
        pthread_join(thread[1],NULL);
        printf("线程2已经结束\n");
    }
}

int main()
{
    //用默认属性初始化互斥锁
    pthread_mutex_init(&mut,NULL);
    printf("我是主函数哦，我正在创建线程，呵呵\n");
    thread_create();
    printf("我是主函数哦，我正在等待线程完成任务阿，呵呵\n");
    thread_wait();
    return 0;
}

编译 :

       gcc -lpthread -o thread_example lp.c