Messages in this thread | | | Date | Wed, 04 Jan 2006 18:54:48 +0100 | From | Takashi Iwai <> | Subject | Re: [2.6 patch] schedule obsolete OSS drivers for removal |
| |
At Wed, 4 Jan 2006 11:37:26 +0100, tapas wrote: > > -- ALSA's default open mode is "blocking". But the ALSA API uses the > term blocking in two meanings and throws them together into the open > mode of a pcm device. Normally on device files, blocking access means a > read()/write() returns, when there's data which has actually been > read/written to the device. nonblocking access means, read()/write() > return immediately. In ALSA blocking mode means above _plus_ that the > open call will only immediately return (in case of contention) when the > previous user of the audio device has given it up. > > The combination of the last two is deadly :) It leaves users with > nonfunctional sound plus seemingly hanging apps when their soundcard is > not hardware mixing capable. So IMHO, to fix these two issues really is > the most pressing matter of all, but like i said, sadly ALSA devs seem > to disagree (i haven't followed ALSA development that closely lately > though).
Note that as of OSS emulation, this is no longer true. The OSS devices are opened as "non-blocking" per default. ALSA native devices are opened as "blocking" just to keep the compatible behavior, though.
Takashi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |