[linux-audio-dev] jack_callback <-> rest of the world

Lee Revell rlrevell at joe-job.com
Mon Oct 31 15:57:46 UTC 2005


On Mon, 2005-10-31 at 01:44 +0100, Florian Schmidt wrote:
> On Sun, 30 Oct 2005 14:14:19 +0100
> fons adriaensen <fons.adriaensen at skynet.be> wrote:
> 
> > On Sun, Oct 30, 2005 at 01:53:48PM +0100, Florian Schmidt wrote:
> > 
> > > Oh i thought i read somewhere that when pthread_cond_wait it is not
> > > guaranteed that anyone actually signalled. Will do some more reading.
> > 
> > It can return on unix signals, so you have to test for EINTR.
> > I don't think it will wake up unexpectedly otherwise.
> > 
> > I'm thinking of rewriting the whole ITC object so it uses a
> > futex instead of the CV (that would also enable it to work
> > in shared memory across process boundaries), but then I really
> > need a lock free implementation for the linked lists. 
> > I guess the required primitives are platform dependant.
> > Is their some library that provides them ?
> 
> 
> Btw: i just discovered that pthread mutexes and condvars can have a
> "process shared" flag which makes it possiblo to synchronize threads
> across processes as it seems. Could be useful for jack, no?
> 
> pthread_condvar_setpshared()
> pthread_mutexattr_setpshared()
> 
> Or do i misread that manpage?

What manpage?  I don't have those on my system.

Lee




More information about the Linux-audio-dev mailing list