c_cpp uv__next_timeout.c

Posted 2021-05-14

int uv__next_timeout(const uv_loop_t* loop) {
  const struct heap_node* heap_node;
  const uv_timer_t* handle;
  uint64_t diff;

  heap_node = heap_min((const struct heap*) &loop->timer_heap);
  if (heap_node == NULL)
    return -1; /* block indefinitely */

  handle = container_of(heap_node, uv_timer_t, heap_node);
  if (handle->timeout <= loop->time)
    return 0;

  diff = handle->timeout - loop->time;
  if (diff > INT_MAX)
    diff = INT_MAX;

  return diff;
}