On Wed, 2006-06-07 at 11:12 +0300, Jussi Laako wrote: > Paul Davis wrote: > > writing to a pipe is not 100% RT safe, but if the pipe is created in a > > shm filesystem, its as close to it as you will get without ... > > Nowadays, there's also available a very good interface from POSIX RT > extensions; posix message queues. See mq_send(3). You can use either > mq_receive(3) or mq_notify(3) for reception of the message. > > I also measured posix message queues to be about twice as fast as for > example local (unix) sockets. > > Now that Linux systems generally are pretty close to full POSIX > (IEEE-1003.1) compliance, I don't see any reason why not to make > advantage of it.
nice to hear that they are faster. on the other hand, once again POSIX screws us all over by not integrating everything into a single blocking wait call. i've said it before, i'll say it again - this is one of the few things that the win32 API gets right - you can block in one call on almost *anything*. AFAICT, you cannot select/poll on a msg queue.
