It looks like you’re using the C++ wrapper for libpd. Did you build it with thread support and/or are you using the queued layer?

There are actually 3 threads here:

* main application thread
* audio thread
* Open GL thread

libpd will obviously be utilized by the audio thread where you run the libpd process function. If you are *not* using a mutex or the queued layer, you may have resource issues between the audio thread and the other threads.

--------
Dan Wilcox
@danomatika
danomatika.com
robotcowboy.com

On Feb 17, 2016, at 4:00 AM, pd-dev-request@lists.iem.at wrote:

From: 0222445 <Luis.Valdivia@stud.sbg.ac.at>
Subject: [PD-dev] Fwd: Synchronizing OpenGL with libpd (with RtAudio or Port Audio)
Date: February 16, 2016 at 9:00:30 PM MST
To: pd-dev@lists.iem.at


I have to synchonize a Metronome (wrote with libpd) and OpenGL graphics. I'd like to move some objects parallel with the metronome clicks.
The language is C++, the Gui is made with WxWidgets, Threads with Poco, audio with RtAudio.
The metronome works, OpenGL graphics too, I have only a problem with the synchronisation. I'm running both things with a Thread, but it actually doesn't works, the metronome run and the graphic is done after the metronome stops (and not parallel). i become  the CGLError 10004 from OpenGL during the execution of the thread (if CLGError is = 0 the draw is going to be done). The object is moved when the thread is completed.