Implementing A "Future" (Cont.)


  f->value_is_set = 0;
  f->value = 0;  /* just to be safe. */
  if (pthread_mutex_init(&f->mutex, NULL) != 0)
    goto int_future_init_mutex_fail;
  if (pthread_cond_init(&f->cond, NULL) != 0)
    goto int_future_init_cond_fail;

 int_future_init_cond_fail:
  pthread_mutex_destroy(&f->mutex);
 int_future_init_mutex_fail:
 int_future_init_ret:
  return rc;
}