Thanks for reassuring me that there isn't some sort of incompatibility with alsa lib and threading. I am not able to reproduce the issue on an x86 system and it only seems to happen when built with a specific toolchain for ARM. Takashi Iwai wrote: > At Tue, 19 Aug 2008 17:24:06 -0500, > Brian Rhodes wrote: > >> When calling snd_pcm_write* from a thread how do you safely cancel the >> thread? I've tried masking the signals which are used in alsa lib, yet >> I am getting a segfault on pthread_exit(). My thread is looping doing >> the following. >> >> testcancel >> snd_pcm_wait >> snd_pcm_avail >> snd_pcm_writei >> >> I am checking return values to handle those functions being woken up by >> pthread cancel and attempting to exit. In testing the process it >> performs fine until I start actually writing data. Once I write some >> data, a pthread_exit will segfault. My cancellation routine is calling >> snd_pcm_drop, then doing a cancel followed by join. >> > > No, alsa-lib functions don't care threads in general. > Some codes have uses pthread_mutex, but not in the PCM core code, at > least. > > You need to handle and protect threads by yourself. > > > Takashi > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
