Heya! If we look into the pcm example how snd_pcm_poll_descriptors_revents() is used then we can see that the revents parameter apparently is supposed to be a single integer. (which makes a lot of sense to me) http://www.alsa-project.org/alsa-doc/alsa-lib/_2test_2pcm_8c-example.html#a33 However, snd_pcm_wait_nocheck() calls the same function and assumes it is a complete array! http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=src/pcm/pcm.c;h=74d1d1a4bd6083cd461b6d793c0ae41cca912f16;hb=HEAD#l2368 So what's it now? It makes more sense to me if it would be a single fd. The problem becomnes visible if someone writes a plugin that wants wakeups from more than one fd because either snd_pcm_wait() using applications start to act weirdly because the revents are not fully initialized or snd_pcm_poll_descriptors_revents() using applications get invalid memory accesses. This has become visible in the Bluetooth plugin. I guess nobody has written a plugin that has more than one fd to sleep on yet, right? Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net ICQ# 11060553 http://0pointer.net/lennart/ GnuPG 0x1A015CC4 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
