7 Dec
2005
7 Dec
'05
7:12 a.m.
On Wed, 7 Dec 2005 09:30:28 +0100
Stéphane Letz <letz(a)grame.fr> wrote:
jackd (of jackdmp in "synch" mode) where
the server waits for all
clients to finish in a given cycle require the used synchronization
primitive to have a "wait with time-out" operation. Fifo can do that
(using poll), Mach semaphore on OSX can do that, but POSIX named
semaphore not.
Do process shared mutexes/CVs have a "wait with time-out" operation.?
Well, there's
int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t
*mutex, const struct timespec *abstime);
(from man "pthread_cond_wait") which probably works with a condition
variable/mutex pair in shared memoryu, too.
But i don't know anything about any timing guarantees. I suppose POSIX
simply doesn't make any. Anyways, the precision of the timed wait is
probably implementation dependent.
Regards,
Flo
--
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