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

pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond =PTHREAD_COND_INITIALIZER;

int condition = 0;

void send_msg()
{
    condition = 1;
    pthread_cond_broadcast(&cond);
}

void resive_msg()
{
    pthread_mutex_lock(&mutex);
    while(!condition)
    {
        pthread_cond_wait(&cond,&mutex);
    }
    pthread_mutex_unlock(&mutex);
}

void *createThread(void *p)
{
    int threadID = *(int*)p;
    printf("Thread %i is waiting for message ...\n",threadID);
    resive_msg();
    printf("Thread %i reseive the message ",threadID);

}
int main()
{
    int thread_cnt = 10;
    pthread_t threads[thread_cnt];
    for(int i = 0 ; i < thread_cnt; ++i)
    {
        printf("thread %i is starting\n",i);
        pthread_create(&threads[i],NULL,createThread,&i);
    }
    printf("Done\n");
}