<F28>isc_result_t
isc_ratelimiter_enqueue(isc_ratelimiter_t *rl, isc_task_t *task,
			isc_event_t **eventp)
{
	isc_result_t result = ISC_R_SUCCESS;
	isc_event_t *ev;

	REQUIRE(eventp != NULL && *eventp != NULL);
	REQUIRE(task != NULL);
	ev = *eventp;
	REQUIRE(ev->ev_sender == NULL);

	LOCK(&rl->lock);
	if (rl->state == isc_ratelimiter_ratelimited ||
	    rl->state == isc_ratelimiter_stalled) {
		isc_event_t *ev = *eventp;
		ev->ev_sender = task;
				^^^^^^^^^^^^ ? isc_task_attach()?

		ISC_LIST_APPEND(rl->pending, ev, ev_link);
		*eventp = NULL;
	} else if (rl->state == isc_ratelimiter_idle) {
		result = isc_timer_reset(rl->timer, isc_timertype_ticker, NULL,
					 &rl->interval, ISC_FALSE);
		if (result == ISC_R_SUCCESS) {
			ev->ev_sender = task;
					^^^^^^^^^^^^ ? isc_task_attach()?