On Dec 11, 2003, at 8:02 PM, Andrew Begel wrote: 4. Are NSThreads implemented using pthreads or directly on top of Mach threads? i.e. if I call pthread_self() from an NSThread, will that give me a real answer? They sit on top of pthreads. So, an NSThread can call pthread functions without worry. --Jim PS: The ABI questions are best answered by others. However, there is Mach-O ABI documentation on the http://developer.apple.com website that you should definitely take a look at. _______________________________________________ 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.