There's a good, byte-stream lock-free fifo in pd/src/s_audio_paring.c . (It's borrowed from portaudio). The difficulty there would be the necessity of encoding everything into byte streams. Perhaps just sprintf/sscanf will do it for you.
cheers Miller
On Tue, Aug 23, 2016 at 03:49:20PM +0200, Marco Matteo Markidis wrote:
Dear all,
I'm developing an external that has two threads, one audio thread and one worker thread. The audio thread contains all usual stuff; while the worker thread computes calculations (I need knn searches and so on for my resynthesis) and put them in a data structure. At the end of calculations, the worker thread atomically CAS the data structure. Actually, I'm using a [readsf~]-like mechanics with pthread signal to communicate between threads.
I would like to remove lock and use a lock free system. I don't know if it feasible. Moreover I don't know if it has some sense, because Pd locks a mutex in scheduler and I don't know if a lock free implementation could be a right solution.
In the case it could be a solution, I will start with a SPSC circular queue and I will use atomic CAS to swap the data structure.
Best regards,
Marco
Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list