site_archiver@lists.apple.com Delivered-To: Darwin-dev@lists.apple.com OK... Thanks Stephane _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... Moreover how can I tranfers messages between the 2 involved threads using condition variables? I though that it would need to use an intermediate queue of fifo? Using the Mac IPC allows directly to do that... Do it in the process' memory? You have a pthread mutex, it can protect a private queue in addition to the condition variable. Do you mean using "pthread_mutex" and "pthread_cond_signal/wait" API? How can this be done? In fact, the condition variable is only interesting when the queue runs dry. This is always more efficient than trying to queue the memory in the kernel. Besides, you are limited to a queue depth of 16 (default 5) when you use Mach message queues. Not really much of a queue to store things in, when you think about it. This email sent to site_archiver@lists.apple.com