//cond lock

#include<stdio.h>

#include<unistd.h>

#include<pthread.h>

struct test

{

    char a[];

    char b[];

    char c[];

}yb = {"","",""};

static int j=;

pthread_mutex_t mutex_1 = PTHREAD_MUTEX_INITIALIZER;;

pthread_cond_t  cond_1;

void Print1(struct test *arg)

{

    while()

    {

        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\n",arg->a,arg->b,arg->c,pthread_self(),j++);

        pthread_mutex_unlock(&mutex_1);

        pthread_exit((void *)j);

    }

    printf("Never Coming.\n");

}

void Print2(void *arg1)

{

    pthread_mutex_lock(&mutex_1);

    printf("coming.\n");

    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\n",(int)set);

    pthread_join(pid2,&set);

    printf("pid2 exit coed %d\n",(int)set);

    pthread_join(pid3,&set);

    printf("pid3 exit coed %d\n",(int)set);

    pthread_join(pid4,&set);

    printf("pid4 exit coed %d\n",(int)set);

    sleep();

    pthread_cond_destroy(&cond_1);

    return ;

}