笔记3 linux 多线程 条件变量+互斥锁

//cond lock
#include<stdio.h>
#include<unistd.h>
#include<pthread.h>

struct test
{
    char a[10];
    char b[10];
    char c[10];
}yb = {"111","222","33333"};

static int j=0;

pthread_mutex_t mutex_1 = PTHREAD_MUTEX_INITIALIZER;;
pthread_cond_t  cond_1;

void Print1(struct test *arg)
{
    while(1)
    {
        pthread_mutex_lock(&mutex_1);
        pthread_cond_wait(&cond_1,&mutex_1); //等待满足某些要求的消息到达
        printf("a=%s,b=%s,c=%s,d=%X,j=%d
",arg->a,arg->b,arg->c,pthread_self(),j++);
        pthread_mutex_unlock(&mutex_1);
        pthread_exit((void *)j);
    }
    printf("Never Coming.
");
}

void Print2(void *arg1)
{
    pthread_mutex_lock(&mutex_1);
    printf("coming.
");
    pthread_mutex_unlock(&mutex_1);
    pthread_cond_signal(&cond_1);
}

int main()
{
    pthread_t pid1,pid2,pid3,pid4;
    void *set;
    pthread_cond_init(&cond_1,NULL);
    
    pthread_create(&pid1,NULL,&Print1,&yb);
    pthread_create(&pid2,NULL,&Print2,&yb);
    pthread_create(&pid3,NULL,&Print1,&yb);
    pthread_create(&pid4,NULL,&Print2,&yb);

    pthread_join(pid1,&set);
    printf("pid1 exit coed %d
",(int)set);
    pthread_join(pid2,&set);
    printf("pid2 exit coed %d
",(int)set);
    pthread_join(pid3,&set);
    printf("pid3 exit coed %d
",(int)set);
    pthread_join(pid4,&set);
    printf("pid4 exit coed %d
",(int)set);

    sleep(1);
    pthread_cond_destroy(&cond_1);
    return 0;
}