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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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24
src/hwdep/hwdep.c
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@ -260,13 +260,13 @@ int snd_hwdep_poll_descriptors(snd_hwdep_t *hwdep, struct pollfd *pfds, unsigned
pfds->fd = hwdep->poll_fd;
switch (hwdep->mode & O_ACCMODE) {
case O_WRONLY:
pfds->events = POLLOUT;
pfds->events = POLLOUT|POLLERR;
break;
case O_RDONLY:
pfds->events = POLLIN;
pfds->events = POLLIN|POLLERR;
break;
case O_RDWR:
pfds->events = POLLOUT|POLLIN;
pfds->events = POLLOUT|POLLIN|POLLERR;
break;
default:
return -EIO;
@ -276,6 +276,24 @@ int snd_hwdep_poll_descriptors(snd_hwdep_t *hwdep, struct pollfd *pfds, unsigned
return 0;
}
/**
* \brief get returned events from poll descriptors
* \param hwdep HwDep 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_hwdep_poll_descriptors_revents(snd_hwdep_t *hwdep, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
{
assert(hwdep && pfds && revents);
if (nfds == 1) {
*revents = pfds->revents;
return 0;
}
return -EINVAL;
}
/**
* \brief set nonblock mode
* \param hwdep HwDep handle