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

[Wischer, Timo (ADITG/ESB)]

> I don't understand.  The pulse plugin calls pa_stream_drain(), and
> pulse_wait_operation() to wait until the drain finishes.  What does it
> have to do with threading?

As far as I understand you patch io->data->callback->drain() will not be called in nonblocking mode.
+       if (io->data->state == SND_PCM_STATE_DRAINING) {
+               if (io->data->nonblock)
+                       return -EAGAIN;
+
+               if (io->data->callback->drain) {
+                       err = io->data->callback->drain(io->data);
+                       if (err < 0)
+                               return err;
+               }
+       }

Therefore how should call pa_stream_drain() in case of nonblocking mode?

Best regards

Timo