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Added snd_*_poll_descriptors_revents functions.

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This commit is contained in:
Jaroslav Kysela 2001-11-30 17:36:45 +00:00
parent 23ab0b3509
commit ddb7209e9a
15 changed files with 195 additions and 36 deletions
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22
src/mixer/mixer.c
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@ -599,6 +599,28 @@ int snd_mixer_poll_descriptors(snd_mixer_t *mixer, struct pollfd *pfds, unsigned
return count;
}
/**
* \brief get returned events from poll descriptors
* \param mixer Mixer handle
* \param pfds array of poll descriptors
* \param nfds count of poll descriptors
* \param revents returned events
* \return zero if success, otherwise a negative error code
*/
int snd_mixer_poll_descriptors_revents(snd_mixer_t *mixer, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
{
unsigned int idx;
unsigned short res;
assert(mixer && pfds && revents);
if (nfds == 0)
return -EINVAL;
res = 0;
for (idx = 0; idx < nfds; idx++)
res |= pfds->revents & (POLLIN|POLLERR);
*revents = res;
return 0;
}
/**
* \brief Wait for a mixer to become ready (i.e. at least one event pending)
* \param mixer Mixer handle