Function unenroll

lib/timers.js:71–104

(item)

// Remove a timer. Cancels the timeout and resets the relevant timer properties.
function unenroll(item) {
  if (item._destroyed)
    return;

  item._destroyed = true;

  if (item[kHasPrimitive])
    delete knownTimersById[item[async_id_symbol]];

  emitDestroy(item[async_id_symbol]);

  L.remove(item);

  // We only delete refed lists because unrefed ones are incredibly likely
  // to come from http and be recreated shortly after.
  // TODO: Long-term this could instead be handled by creating an internal
  // clearTimeout that makes it clear that the list should not be deleted.
  // That function could then be used by http and other similar modules.
  if (item[kRefed]) {
    // Compliment truncation during insert().
    const msecs = MathTrunc(item._idleTimeout);
    const list = timerListMap[msecs];
    if (list !== undefined && L.isEmpty(list)) {
      debug('unenroll: list empty');
      timerListQueue.removeAt(list.priorityQueuePosition);
      delete timerListMap[list.msecs];
    }

    decRefCount();
  }

  // If active is called later, then we want to make sure not to insert again
  item._idleTimeout = -1;
}


/**