[alsa-devel] [PATCH - IOPLUG DRAIN 0/2]

[twischer at de.adit-jv.com]

Hi Takashi,

> Why not poll()?

> IOW, why ioplug must be handled specially regarding the non-blocking
>operation?  The normal kernel driver behaves like that (returning
> -EAGAIN, and let apps to sync with poll()).


What do you think about the following solution?

(I thought the whole time that you have to use snd_pcm_wait() to wait for drain
in nonblocking mode but you have to use the poll_descriptors directly.)

Know I am expecting that the user is calling poll()
if snd_pcm_drain() returns -EAGAIN and
the user has to call snd_pcm_drain() again after poll returns
to check if drain is done.

Thanks for your help so far.

Best regards

Timo