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control, pcm: implement snd_ctl_abort() and snd_pcm_abort() functions

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Upon an interrupt, it is necessary to abort the wait loops with the EINTR
error code. Introduce snd_*_abort() functions to handle this case.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2013-04-08 13:28:03 +02:00
parent 730c833dd8
commit e23fb2c4de
7 changed files with 17 additions and 4 deletions
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2
src/control/hcontrol.c
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@ -696,7 +696,7 @@ int snd_hctl_wait(snd_hctl_t *hctl, int timeout)
pollio = 0;
err_poll = poll(pfd, npfds, timeout);
if (err_poll < 0) {
if (errno == EINTR)
if (errno == EINTR && !CTLINABORT(hctl->ctl))
continue;
return -errno;
}