Re: problems using select() on alsa pcm.

[Takashi Iwai <tiwai@suse.de>]

At Thu, 25 Mar 2004 11:25:56 +0100,
Martijn Sipkema wrote:
> 
> > >open pcm, and get a handle.
> > >
> > >snd_pcm_poll_descriptors(handle, &pfd, err);
> > >
> > >Get a poll file scriptor in pfd.
> > >
> > >select(nfds, rfds, wfds, efds, tvp);
> > >
> > >Is it possible to use this call with alsa ?
> > 
> > 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).
> 
> select and pselect do allow for a more accurate timeout specification.

from the spec, yes.  but nsec resolution would be never implemented :)

> Why is select deprecated?

because select is just a wrapper of poll in fact (on linux)?


Takashi


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