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

[Ru Vuott]

Hello Benoît,

I tried to put POLLOUT, but it doesn't change:

 - a CPU always at 100%;
 - line OPEN "." & CStr(numfd) wants For WRITE, and the called sub-routine wants File_Read().
 - I can put File_Write() also, but so I have to put the "no-blocking" Alsa function:  snd_seq_nonblock(handle, 1) in the calling routine.

...in short, no newness...

I'ld like remember the problem is the CPU working at 100%.

Regards
Paolo







--- Lun 26/9/11, Benoît Minisini <gambas at ...1...> ha scritto:

> Da: Benoît Minisini <gambas at ...1...>
> Oggetto: Re: [Gambas-user] Gambas + Midi + ALSA + file descriptors
> A: "mailing list for gambas users" <gambas-user at lists.sourceforge.net>
> Data: Lunedì 26 settembre 2011, 13:19
> > 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
> 
> ------------------------------------------------------------------------------
> All the data continuously generated in your IT
> infrastructure contains a
> definitive record of customers, application performance,
> security
> threats, fraudulent activity and more. Splunk takes this
> data and makes
> sense of it. Business sense. IT sense. Common sense.
> http://p.sf.net/sfu/splunk-d2dcopy1
> _______________________________________________
> Gambas-user mailing list
> Gambas-user at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gambas-user
>