Function test_thread

examples/libc/ex7.c:33–67

event_t main_event;

static void *test_thread(void *ms_param) {
    int status = 0;
    event_t foo;
    struct timespec time;
    struct timeval now;
    long ms = (long) ms_param;

    /* initialize cond var */
    pthread_cond_init(&foo.cond, NULL);
    pthread_mutex_init(&foo.mutex, NULL);
    foo.flag = 0;

    /* set the time out value */
    printf("waiting %ld ms ...\n", ms);
    gettimeofday(&now, NULL);
    time.tv_sec = now.tv_sec + ms / 1000 + (now.tv_usec + (ms % 1000) * 1000)
            / 1000000;
    time.tv_nsec = ((now.tv_usec + (ms % 1000) * 1000) % 1000000) * 1000;

    /* Just use this to test the time out. The cond var is never signaled. */
    pthread_mutex_lock(&foo.mutex);
    while (foo.flag == 0 && status != ETIMEDOUT) {
        status = pthread_cond_timedwait(&foo.cond, &foo.mutex, &time);
    }
    pthread_mutex_unlock(&foo.mutex);

    /* post the main event */
    pthread_mutex_lock(&main_event.mutex);
    main_event.flag = 1;
    pthread_cond_signal(&main_event.cond);
    pthread_mutex_unlock(&main_event.mutex);

    /* that's it, bye */
    return (void*) status;
}

int libc_ex7(void) {
    unsigned long count;