lab7.6

#include<stdio.h>

#include<pthread.h>



void *increment(void*);

void *watch(void*);

pthread_mutex_t my_mutex;

pthread_cond_t w_cond;

int count=0;



main()

{

pthread_t tid1, tid2, tid3;

pthread_mutex_init (&my_mutex, NULL);

pthread_cond_init(&w_cond, NULL);



pthread_create(&tid1,NULL,watch, NULL);

pthread_create(&tid2,NULL,increment, NULL);

pthread_create(&tid3,NULL,increment, NULL);



pthread_join(tid1,NULL);

pthread_mutex_destroy(&my_mutex);

pthread_cond_destroy(&w_cond);

printf("Parent is DONE ....\n");

exit(0);

}





void* increment(void *dummy)

{

while(count<10)

{

pthread_mutex_lock(&my_mutex);

printf("Cound =%d by thread %d\n",++count,pthread_self());

if(count==10)

pthread_cond_signal(&w_cond);

pthread_mutex_unlock(&my_mutex);

sleep(1);

}

return;

}

void* watch(void *dummy)

{

pthread_mutex_lock(&my_mutex);

pthread_cond_wait(&w_cond,&my_mutex);

pthread_mutex_unlock(&my_mutex);

printf("Watch is DONE...\n");

return;

}