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sched/signal: add spinlock to g_sigfreeaction

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To avoid nxsig_alloc_action() & nxsig_release_action() competition

MIRTOS-800

Change-Id: I6091ed9d6425a382e8c41351817b6d5ea06638f1
Signed-off-by: ligd <liguiding1@xiaomi.com>
This commit is contained in:
ligd
2021-07-13 21:56:29 +08:00
parent 37c86a6510
commit 9b6665b9e9
1 changed files with 9 additions and 0 deletions
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sched/signal/sig_action.c
+9
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@@ -53,10 +53,13 @@
static FAR sigactq_t *nxsig_alloc_action(void)
{
FAR sigactq_t *sigact;
irqstate_t flags;
/* Try to get the signal action structure from the free list */
flags = spin_lock_irqsave();
sigact = (FAR sigactq_t *)sq_remfirst(&g_sigfreeaction);
spin_unlock_irqrestore(flags);
/* Check if we got one. */
@@ -68,7 +71,9 @@ static FAR sigactq_t *nxsig_alloc_action(void)
/* And try again */
flags = spin_lock_irqsave();
sigact = (FAR sigactq_t *)sq_remfirst(&g_sigfreeaction);
spin_unlock_irqrestore(flags);
DEBUGASSERT(sigact);
}
@@ -363,7 +368,11 @@ int sigaction(int signo, FAR const struct sigaction *act,
void nxsig_release_action(FAR sigactq_t *sigact)
{
irqstate_t flags;
/* Just put it back on the free list */
flags = spin_lock_irqsave();
sq_addlast((FAR sq_entry_t *)sigact, &g_sigfreeaction);
spin_unlock_irqrestore(flags);
}