Hello, version 15 of threadpool is out - I hope it is the final version. The code doesn't use fibers - fork/join is implemented via recursive execution of tasks (in task::get()). Only tasks in the local worker-queue will be recursivly executed. The work-thread will block in task::get() if the local worker-queue is empty (happens if at least one other worker-thread has stolen a task from the local queue). regards, Oliver -- GMX Download-Spiele: Preizsturz! Alle Puzzle-Spiele Deluxe über 60% billiger. http://games.entertainment.gmx.net/de/entertainment/games/download/puzzle/in...