On Thu, 07 Jul 2016 16:40:10 +0200, Takashi Iwai wrote: > > Hi, > > here is a v2 patchset for supporting multi thread safety to alsa-lib > PCM API. Now it's out from RFC and should be reviewed as an official > patchset. > > Basically ALSA PCM functions are thread-unsafe, and applications are > supposed to do the proper protection against racy accesses. The > reality is, however, that application developers don't care such, as > alsa-lib works in most cases. Of course, users still get occasionally > mysterious crashes. > > As a workaround, this patchset adds the pthread mutex protection to > most of exported PCM functions. This is slightly an overkill, but the > biggest merit is that it's easy to implement; I just wrapped the > functions and replaced the internal ones with unlocked versions. > > To be noted, there is an optimization for the direct hw PCM access. > Performance-sensitive applications like JACK should work like before > without any overhead. > > Another bonus by this addition is that we can finally get rid of home > brew (and deadly smelling) atomic macros from the tree, since it's now > more widely protected. > > I lightly tested on my local machines (dmix, PA, jack and plugins) and > all seem working well, so far. As there's been no objection, I pushed this patchset now. Let me know if this gives any regression. thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
