让子线程继续，父线程阻塞

#include<stdio.h>
#include<stdlib.h>
#include<pthread.h>

static pthread_mutex_t mutex=PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t cond=PTHREAD_COND_INITIALIZER;

pthread_t tid1;
void * thread1()
{
    int i;
    for(i=1;i<=100;i++)
    {
        sleep(1);
        printf("hello world!----->%d\n",i);
        if(i==10)
        {
            pthread_cond_signal(&cond);
        }
    }
}


int main()
{
    int rc1=pthread_create(&tid1,NULL,thread1,NULL);
    if(rc1!=0)
    {
        printf("can't create rc1\n");
        return(-1);
    }
   pthread_cond_wait(&cond,&mutex);
    printf("________________________leave main\n");
    printf("current pid is --------------------%d\n",getpid());
    return 1;
}