Re: [LAD] [Jack-Devel] jack2's dbus name

On Thu, Jun 18, 2009 at 2:45 PM, Lennart Poettering<mzynq@email-addr-hidden> wrote:
>
> So, how would I use this? I figure something like this:
>
> <snip>
> void* my_thread(void*arg) {
>    for (;;) {
>        n = jack_cycle_wait(client);
>        process_my_data(n);
>        jack_cycle_signal(client, 0);
>        do_my_other_work_if_there_is_any();
>    }
> }

yep.

> So, to map this to JACK, I would prefer if jack_cycle_wait() would
> also exist in a non-blocking variant. i.e. something that can return 0
> if there's nothing to process, but doesn't necessarily wait.

that's not possible. the thread has to be ready to respond to the
start of the JACK process cycle with RT-friendly timing.
thats why "do_my_other_work_if_there_is_any()" is still under RT
constraints *AND* needs to be designed knowing that
it may be stealing processor time from other parts of the process cycle.

you cannot just "dip into JACK and see if its time to process() - you
must be ready for it when that time comes.

> (we probably should stop the cross-posting, though)

truncated to LAD.
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Received on Fri Jun 19 00:15:04 2009