linux下线程的同步示例

来源：互联网发布：护肤品数据编辑：程序博客网时间：2024/05/18 02:06

/*thread_example.c : c multiple thread programming in linux
*/
#include
#include
#include
#include
#define MAX1 10
#define MAX2 30

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 < MAX1; i++)
        {
                printf("thread1 : number = %d i=%d//n",number,i);
                pthread_mutex_lock(&mut);
                        number++;
                pthread_mutex_unlock(&mut);
                sleep(2);
        }

printf("thread1 :Is main function waiting for me acomplishing task? //n");
pthread_exit(NULL);
}

void *thread2()
{
printf("thread2 : I/'m thread 2//n");

        for (i = 0; i < MAX2; i++)
        {
                printf("thread2 : number = %d i=%d//n",number,i);
                pthread_mutex_lock(&mut);
                        number++;
                pthread_mutex_unlock(&mut);
                sleep(3);
        }

printf("thread2 :Is main function waiting for me to acomplish task ?//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("Thread 1 is established//n");

        if((temp = pthread_create(&thread[1], NULL, thread2, NULL)) != 0) //comment3
                printf("线程2创建失败");
        else
                printf("Thread 2 is established//n");
}

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

int main()
{
/*用默认属性初始化互斥锁*/
pthread_mutex_init(&mut,NULL);

        printf("I am the main funtion,and I am establishing threads. Ha-ha//n");
        thread_create();
        printf("I am the main funtion,and I am waiting for thread to accomplish task. Ha-ha//n");
        thread_wait();

return 0;
}

///////////////////////////////////////////////////////////

本文用菊子曰发布