ISC_TASKFUNC_SCOPE isc_boolean_t isc__task_purgeevent(isc_task_t *task0, isc_event_t *event) { isc__task_t *task = (isc__task_t *)task0; isc_event_t *curr_event, *next_event; /* * Purge 'event' from a task's event queue. * * XXXRTH: WARNING: This method may be removed before beta. */ REQUIRE(VALID_TASK(task)); /* * If 'event' is on the task's event queue, it will be purged, * unless it is marked as unpurgeable. 'event' does not have to be * on the task's event queue; in fact, it can even be an invalid * pointer. Purging only occurs if the event is actually on the task's * event queue. * * Purging never changes the state of the task. */ LOCK(&task->lock); for (curr_event = HEAD(task->events); curr_event != NULL; curr_event = next_event) { next_event = NEXT(curr_event, ev_link); if (curr_event == event && PURGE_OK(event)) { DEQUEUE(task->events, curr_event, ev_link); break; } } UNLOCK(&task->lock); if (curr_event == NULL) return (ISC_FALSE); isc_event_free(&curr_event); return (ISC_TRUE); }
static unsigned int dequeue_events(isc_task_t *task, void *sender, isc_eventtype_t first, isc_eventtype_t last, void *tag, isc_eventlist_t *events, isc_boolean_t purging) { isc_event_t *event, *next_event; unsigned int count = 0; REQUIRE(VALID_TASK(task)); REQUIRE(last >= first); XTRACE("dequeue_events"); /* * Events matching 'sender', whose type is >= first and <= last, and * whose tag is 'tag' will be dequeued. If 'purging', matching events * which are marked as unpurgable will not be dequeued. * * sender == NULL means "any sender", and tag == NULL means "any tag". */ LOCK(&task->lock); for (event = HEAD(task->events); event != NULL; event = next_event) { next_event = NEXT(event, ev_link); if (event->ev_type >= first && event->ev_type <= last && (sender == NULL || event->ev_sender == sender) && (tag == NULL || event->ev_tag == tag) && (!purging || PURGE_OK(event))) { DEQUEUE(task->events, event, ev_link); ENQUEUE(*events, event, ev_link); count++; } } UNLOCK(&task->lock); return (count); }