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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/control/control.c
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@ -160,15 +160,33 @@ int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl)
*/
int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space)
{
assert(ctl);
assert(ctl && pfds);
if (space > 0) {
pfds->fd = ctl->poll_fd;
pfds->events = POLLIN;
pfds->events = POLLIN|POLLERR;
return 1;
}
return 0;
}
/**
* \brief get returned events from poll descriptors
* \param ctl CTL 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_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
{
assert(ctl && pfds && revents);
if (nfds == 1) {
*revents = pfds->revents;
return 0;
}
return -EINVAL;
}
/**
* \brief Ask to be informed about events (poll, #snd_ctl_async, #snd_ctl_read)
* \param ctl CTL handle