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sys/event: allow calling event_post multiple times

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This commit is contained in:
Hauke Petersen 2018-04-19 16:41:13 +02:00
parent f29714ea83
commit 46888a1eaf
2 changed files with 9 additions and 3 deletions
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7
sys/event/event.c
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@ -23,11 +23,12 @@ void event_queue_init(event_queue_t *queue)
void event_post(event_queue_t *queue, event_t *event)
{
assert(!event->list_node.next);
assert(queue->waiter);
assert(queue && queue->waiter && event);
unsigned state = irq_disable();
clist_rpush(&queue->event_list, &event->list_node);
if (!event->list_node.next) {
clist_rpush(&queue->event_list, &event->list_node);
}
irq_restore(state);
thread_flags_set(queue->waiter, THREAD_FLAG_EVENT);

5
sys/include/event.h
View File

@ -149,6 +149,11 @@ void event_queue_init(event_queue_t *queue);
/**
* @brief Queue an event
*
* The given event will be posted on the given @p queue. If the event is already
* queued when calling this function, the event will not be touched and remain
* in the previous position on the queue. So reposting an event while it is
* already on the queue will have no effect.
*
* @param[in] queue event queue to queue event in
* @param[in] event event to queue in event queue
*/