[Gambas-user] Gambas + Midi + ALSA + file descriptors

[Benoît Minisini]

> Hello Benoît,
> 
> I would just like to add that trying your trick ( hFile = Open "." &
> CStr(iAlsaFileDescriptor) For xxx Watch) besides the problem about CPU
> over-working (at 100%), wich I have already told, there is also a strange
> thing: as you see in the source (wich I sent you in my previous e-mail),
> despite the line uses "write": hFile = Open "." &
> CStr(iAlsaFileDescriptor) For WRITE Watch
> 
>   (So, for fd passed by Alsa that line works.)
> 
> the called routine "wants" "Read": Public Sub File_Read().
> If I use " sub File_Write() ", it doesn't work !
> 
> Thanks
> Paolo
> 

By using:

	snd_seq_poll_descriptors(handle, pfds, npfds, POLLIN)

You are asking for ALSA file descriptors used for reading data, not for 
writing. So all that behaviour is expected!

Maybe if you put POLLOUT instead, things will behave better.

See the ALSA documentation:

http://www.alsa-project.org/alsa-doc/alsa-
lib/group___sequencer.html#g5086fbf4e38449108a0807fb5cf5e9c6

Regards,

-- 
Benoît Minisini