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snd_pcm_dmix_close: raise semaphore if unable to discard

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This patch causes snd_pcm_dmix_close() to up a semaphore after downing it
if it is unable to discard it.  It prevents some deadlock that I am
getting when a couple of applications interact and one of them closes the
device and later re-opens it.

From: Mike Gorse <mgorse@mgorse.dhs.org>
This commit is contained in:
Takashi Iwai 2007-10-18 11:10:35 +02:00
parent c2e368e7f7
commit d6093c58f3
1 changed files with 4 additions and 3 deletions
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7
src/pcm/pcm_dmix.c
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@ -652,9 +652,10 @@ static int snd_pcm_dmix_close(snd_pcm_t *pcm)
if (dmix->client)
snd_pcm_direct_client_discard(dmix);
shm_sum_discard(dmix);
if (snd_pcm_direct_shm_discard(dmix))
snd_pcm_direct_semaphore_discard(dmix);
else
if (snd_pcm_direct_shm_discard(dmix)) {
if (snd_pcm_direct_semaphore_discard(dmix))
snd_pcm_direct_semaphore_up(dmix, DIRECT_IPC_SEM_CLIENT);
} else
snd_pcm_direct_semaphore_up(dmix, DIRECT_IPC_SEM_CLIENT);
free(dmix->bindings);
pcm->private_data = NULL;