Debugging threads with HP Wilde Beest

l1 = &job_lock1

l2 = &job_lock2

}

else {

l1 = l2 = &job_lock1

}

alarm(20);

/* Create two threads to do the work */

ret_val = pthread_create(&tid1, (pthread_attr_t *)NULL,

(void *(*)())consumer_thread, (void *) l1);

check_error(ret_val, "pthread_create 1 failed");

ret_val = pthread_create(&tid2, (pthread_attr_t *)NULL,

(void *(*)())producer_thread, (void *) l1);

check_error(ret_val, "pthread_create 2 failed");

if (l1 != l2) {

ret_val = pthread_create(&tid3, (pthread_attr_t *)NULL,

(void *(*)())consumer_thread, (void *) l2);

check_error(ret_val, "pthread_create 1 failed");

ret_val = pthread_create(&tid4, (pthread_attr_t *)NULL,

(void *(*)())producer_thread, (void *) l2);

check_error(ret_val, "pthread_create 2 failed");

}

/* Wait for the threads to finish */

ret_val = pthread_join(tid1, (void **)NULL);

check_error(ret_val, "pthread_join: tid1");

ret_val = pthread_join(tid2, (void **)NULL);

check_error(ret_val, "pthread_join: tid2");

if (l1 != l2) {

ret_val = pthread_join(tid3, (void **)NULL);

check_error(ret_val, "pthread_join: tid3");

ret_val = pthread_join(tid4, (void **)NULL);

check_error(ret_val, "pthread_join: tid4");

}

exit(0);

}

void

fatal_error(int err_num, char *function)

{

char *err_string;

err_string = strerror(err_num);

fprintf(stderr, "%s error: %s\n", function, err_string);

exit(-1);