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

[Florian Schmidt]

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?

Flo



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