Hi Ken, Ken Restivo wrote: > It has been over 7 years since I last messed around with writing Pthreads applications. > > I recall it as a painful, ugly, brain-numbing task. I located an exercise I did back then to address the consumer/producer problem in Pthreads, and just the sight of it is giving me a headache. > > I'm being lazy, so instead of researching everything that's out there, I'll ask here: can anyone recommend a relatively simple and painless abstraction library (GPL or LGPL of course) that will give me functions to create a thread in which I can stuff things into a ring buffer, and another thread in which I can pull stuff out of it? > > By the way, I know that JACK has a very nice event buffer which is insanely easy to use (and I have), and makes multithreading almost transparent, but this isn't a JACK app. I don't know of any abstraction library, but creating/terminating a normal thread with pthread is really an easy task IMO. It's about 10 lines in C. For inter-thread communication there's Portaudio's ring buffer: http://portaudio.com/trac/browser/portaudio/trunk/src/common/pa_ringbuffer.h It can easily be used out of Portaudio (I'm currently doing that), and it features memory barriers [1] which AFAIK Jack's ringbuffer doesn't. One problem with everything Portaudio is this heavy naming scheme. For a simpler API, you might like my little wrapper: http://jackbeat.samalyse.org/browser/jackbeat/trunk/src/core/ringbuffer.h Portaudio actually also offers a callback mechanism (with hidden thread creation), so if you're coding an non-JACK audio app, you might want to check it out. For thread synchronization, semaphores (man semaphore.h) are really easy to use. However, if you need a lock-free equivalent (for realtime, ...) phtread mutex and especially pthread_mutex_trylock are your friends. [1] http://www.audiomulch.com/~rossb/code/lockfree/ Cheers, -- Olivier Guilyardi / Samalyse _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
