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);
}
