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

int value;
pthread_mutex_t mutex;
pthread_cond_t new_prod;

void *consumer(void *c) {

    pthread_mutex_lock(&mutex);

    while (value == 0) {
        pthread_cond_wait(&new_prod, &mutex);
    };

    pthread_mutex_unlock(&mutex);

    pthread_exit(NULL);

}

int main(int argc, char** argv) {

    value = 0;

    pthread_mutex_init(&mutex, NULL);
    pthread_cond_init(&new_prod, NULL);

    pthread_attr_t attr;
    pthread_attr_init(&attr);
    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);

    pthread_t cons;
    pthread_create(&cons, &attr, &consumer, NULL);

    printf("\nFIRST STEP\n");

    value = 1;
    pthread_cond_signal(&new_prod);

    printf("\nSECOND STEP\n");

    /* THE PROGRAM STOPS HERE */

    pthread_join(cons, NULL);

    printf("\nTHIRD STEP\n");

    pthread_attr_destroy(&attr);
    pthread_mutex_destroy(&mutex);
    pthread_cond_destroy(&new_prod);

    return (EXIT_SUCCESS);
}