Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4

[Lee Revell]

On Fri, 2004-10-29 at 00:49 +0100, Rui Nuno Capela wrote:
> > plus i've also got questions about how Jackd interfaces with ALSA: does
> > it use SIGIO, or some direct driver ioctl? If SIGIO is used then how is
> > it done precisely - is an 'RT' queued signal used or ordinary SIGIO?
> > Also, how is the 'channel' information established upon getting a SIGIO,
> > is it in the siginfo structure?
> >
> 
> Now that's really pushing me over. Any ALSA-JACK developers around here to
> comment?
> 

I think it uses a direct driver ioctl to open the device.  Then jack
uses mmap to talk to the audio device. 

Anyway I forwarded your question to Paul Davis, the author of JACK, and
cc'ed jackit-devel.

Lee

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