At Wed, 14 Nov 2007 12:34:07 -0400 (GMT+4), Mike Gorse wrote: > > I've noticed that it is unsafe to call snd_pcm_writei or snd_pcm_drain in > a pthread with its cancelation type set to asynchronous. > snd_pcm_dmix_sync_area can lower a semaphore, and, if the thread is > canceled while the semaphore is down, then a subsequent call to the sound > device (calling snd_pcm_close, for instance) will also lower the semaphore > and cause deadlock. Is this a known issue, and is there a way around it > other than to always use deferred cancelation when calling these > functions? I've not looked deeply through this code flow yet, but it sounds possible that the semaphore gets confused. Did you test any codes indicating that? thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
