[alsa-devel] Can ALSA invoke a Callback ?

Clemens Ladisch clemens at ladisch.de
Mon Aug 29 11:12:44 CEST 2011

Ru Vuott wrote:
> you wrote:
> > These functions are designed to be used with poll(); to use
> > them with Gambas, extract the file descriptors and their event masks
> > from the pfds array and call GB.Watch() with these values.
> << GB.Watch() is an internal interpreter API. You can't use it in Gambas code.>>

Then how do you get access to the snd_seq_* functions?  I assumed that
you have some module that offers a Gambas API on top of the ALSA C API;
that module then should also wrap the snd_seq_poll_* calls.

> I need a "file", so I could use in Gambas:
> hfile = Open "....." for Read  W A T C H

You would need some mechanism to watch a file that is identified by its
already opened file descriptor, not by its name.  It looks as if the
only such mechanism is something that uses the internal interpreter API.


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