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xtimer/xtimer.c: _mutex_timeout improvements

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Only yields and change threads status when thread was removed from mutex list.
This commit is contained in:
JulianHolzwarth 2019-06-05 19:19:40 +02:00
parent a321dfc51d
commit 1bcb4fcc5f
1 changed files with 10 additions and 5 deletions
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15
sys/xtimer/xtimer.c
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@ -253,12 +253,17 @@ static void _mutex_timeout(void *arg)
mt->timeout = 1;
list_node_t *node = list_remove(&mt->mutex->queue,
(list_node_t *)&mt->thread->rq_entry);
if ((node != NULL) && (mt->mutex->queue.next == NULL)) {
mt->mutex->queue.next = MUTEX_LOCKED;
}
sched_set_status(mt->thread, STATUS_PENDING);
thread_yield_higher();
/* if thread was removed from the list */
if (node != NULL) {
if (mt->mutex->queue.next == NULL) {
mt->mutex->queue.next = MUTEX_LOCKED;
}
sched_set_status(mt->thread, STATUS_PENDING);
irq_restore(irqstate);
thread_yield_higher();
return;
}
irq_restore(irqstate);
}