At Sun, 8 Mar 2009 16:11:45 -0000 (GMT), Nicolas.Castagne@xxxxxxx wrote: > > Hi folks, > > I'd need the help of some alsa developpers regarding the bug report : > https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4426 > > We've made a few progress on it, but we are stuck again. > > Basically, it seems that calling snd_config_update_free_global() from a > pthread causes the program to crash when the thread terminates. > > > > Questions are: > > Should config_update_free_global NOT be called from a thread ? > > In other words, is the following code valid (though dumb :=)) ? > Or is there some reason for it to crash ? Hm, I don't see any reason, and I cannot reproduce a crash on my machine... Takashi > > > > ********************************** > #include <pthread.h> > #include <alsa/asoundlib.h> > void * threadWork(void *arg) { > snd_pcm_t *playback_handle; > if (snd_pcm_open (&playback_handle, "default", > SND_PCM_STREAM_PLAYBACK, 0) < 0) > fprintf (stderr, "error\n"; > snd_pcm_close(playback_handle); > > snd_config_update_free_global(); > return NULL; > } > int main() { > pthread_attr_t attr; > pthread_attr_init(&attr); > pthread_t threadid; > pthread_create( &threadid, &attr, threadWork, NULL); > return EXIT_SUCCESS; > } > ********************************** > > > I thank you much, > > Nicolas > > > > > > ---------------------------- Message original ---------------------------- > Objet: Crash when snd_pcm_open is called from a thread with "pulse" as > playback > De: castagne@xxxxxxx > Date: Mer 4 mars 2009 8:20 > À: alsa-devel@xxxxxxxxxxxxxxxx > -------------------------------------------------------------------------- > > Hi folks, > > I hope I post on the correct mail list... > I've read somewhere that I should report bugs on a list, and not only on > the Tracker. That's the aim of this message. > > > On all my Fedora 10 machines, > whenever > snd_pcm_open > has been called from a pthread using "pulse" as playback > then the program crashes when the thread terminates. > > Crash in __nptl_deallocate_tsd > > However, AFAIK, one should be able to call snd_pcm_open from a thread. > > The full bug report is there, with a very simple sample code : > https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4426 > > I think this bug relates directly to alsa. > I hope this report is useful. > > > Best- > Nicolas > > > _______________________________________________ > 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
