#include<iostream>
#include<string>
#include<unistd.h>
#include<pthread.h>
using namespace std;
pthread_cond_t cond;
pthread_mutex_t mutex=PTHREAD_MUTEX_INITIALIZER;
void*waitCommand(void*args)
{
    while(true)
    {
        pthread_cond_wait(&cond,&mutex);
        cout << "thread id:"<<pthread_self()<< "run..." <<endl;
    }
}

int main()
{
    pthread_cond_init(&cond,nullptr);
    pthread_t t1,t2,t3;
    pthread_create(&t1,nullptr,waitCommand,(void*)"pthread 1");
    pthread_create(&t2,nullptr,waitCommand,(void*)"pthread 2");
    pthread_create(&t3,nullptr,waitCommand,(void*)"pthread 3");
    pthread_join(t1,nullptr);
    pthread_join(t2,nullptr);
    pthread_join(t3,nullptr);
    pthread_cond_destroy(&cond);
    return 0;
}