[Gambas-user] Revision #4160 feature doesn't work anymore.

[Benoît Minisini]

Le 17/03/2015 18:02, Ru Vuott a écrit :
> Hello Benoît,
>
> as you may recall, revision #4160 implemented the feature to "watch"
> the file-descriptor passed by the ALSA function "snd_seq_event_input
> (seq, & event)", which allows to read a file-descriptor when it is
> "ready".
>
> Well, I must say that this feature **always worked very well**.
> Lately, instead, I have found that it no longer works. But - dear me
> ! - I do not know exactly when it no longer works, because they were
> many months that I did not use any program, written by me ("Demo
> Drum-Machine" and "Sequencer Midi"), having this feature.
>
> The engine of the demo project of Drum-Machine, as also my Midi
> Sequencer, consists of a cycle that - receiving from that function
> Alsa a precise date - allows to send Midi data packets in sequence
> until the end of the file Midi. I noticed that - "now" - if it was a
> planned cycle, the two programs crash right at the predicted ALSA
> function "snd_seq_event_input (seq, & event)". (You can see this
> function at:  Public Sub File_Read() procedure of CAlsa.class in the
> Drum-Machine project.) But, if the program sends data simply by a
> Midi keyboard, everything works well enough (...I say enough, because
> sometimes some data is not played. Before, when "everything" worked
> well, even this small problem existed using the keyboard).
>
>
> Well, I send you, attachments, two projects of the Drum Machine:
>
> - The first, that does NOT work (that is with current problem).
>
> - The second works..... but it is the first project I "edited" to
> make it works. I had to write a FOR loop in the procedure "Public Sub
> btGrid_Click ()",  when the program part for the first time, are now
> forced to send two times the dummy initial echo.
>
> Regards vuott
>

Yep, there is a new read ahead feature in the stream classes that may 
interfere... Can you try revision #6993?

-- 
Benoît Minisini