hmmm I found a pretty good method for accomplishing my purposes, unless it isn't a good way. use IOCreateThread to create the thread and run it, then inside the thread function I call IOSleep(timetosleep); then so the work after the thread wakes up. If I read correctly these are just wrappers for the mach_threads, and I guess IOKit knows threads better to me, so I will let that API take care of it, as long as this API is going to be staying along time. I don't really care if the thread wakes up anywhere from 1 to 10000 milliseconds off from what I told it to sleep, so this method should work for me, unless there is a suggested and recommended way. Matt On Jun 17, 2004, at 12:30 PM, Godfrey van der Linden wrote: G'day Justin, You are right it is #include <kern/thread_call.h> // And can be found in xnu/osfmk/kern It sort of depends on what you want to do with the timeou()t. But for regularly scheduled timeouts I prefer using thread_call_enter directly as it is lighter weight and closer to my requirements. Godfrey On Jun 17, , at 10:38, Justin Walker wrote: On Jun 17, 2004, at 10:11, Godfrey van der Linden wrote: Check out <xnu/kern/thread_call.h> Huh? I don't find such a file. What about a 'timeout()' call? _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.