On Thu, 25 Mar 2004, Paul Davis wrote:
> >> select is generally deprecated in linux (linus says so!). but you can
> >> use the same pfds in select as in poll (select is implemented in the
> >> kernel using the poll code). the problem is interpreting the results
> >> you get back (as noted recently for the dmix plugin).
> >
> >Nope, the application must give results back to pfd array and call
> >snd_pcm_poll_descriptors_revents() function. In this way, everything
> >will work as expected.
>
> i thought that the flags set by select(2) were different than those
> set by poll(2) ??
Yes, but the results are similar. So you have to do:
snd_pcm_poll_descriptors(pfds)
pfds->events -> FD_SET(x, y)
select()
FD_ISSET(x, y) -> pfds->revents
revents = snd_pcm_poll_descriptors_revents(pfds)
if (revents & POLLOUT)
playback_event();
if (revents & POLLIN)
capture_event();
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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