hi, Now that I have resolved the pthread_join issue... i was wondering what's the best thing to do.... according to O'Reilly pThreads programming book, detached threads, switch faster. cheers, mvo _______________________________________________ darwin-development mailing list | darwin-development@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-development Do not post admin requests to the list. They will be ignored. So I could create a waiting on delete mechanism by creating a Semaphore (lock/Unlock) Would this be better (performance wise) then using an attached thread?