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pcm: add SND_CTL_EINTR open mode

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Add possibility to return -EINTR instead waiting for the event. The
applications may want to handle -EINTR condition themselves.

BugLink: https://github.com/alsa-project/alsa-lib/issues/228
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2023-05-03 11:48:35 +02:00
parent d6d5982d3a
commit 507d906abb
8 changed files with 13 additions and 8 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 && !CTLINABORT(hctl->ctl))
if (errno == EINTR && !CTLINABORT(hctl->ctl) && !(hctl->ctl->mode & SND_CTL_EINTR))
continue;
return -errno;
}