Hi Vicente, please ignore my last post. I've uploaded a new version v14. First work-stealing will happen when possible - can not be disabled. I believe we don't need functions to enable/disable fork/join. Because fork/join is implicit if the code calls task< R >::get() in a worker thread (if blocking is desired I can provide task< R >::get( block() ) ). The sub-tasks are stored inside the local worker queue (work-stealing queue). The worker-queue works like a stack if the worker thread (owning the local queue) puts and takes sub-tasks from it (the stack represents the task-tree). Thatswhy we don't need such things like special tasks like TBB. The only open item is how to solve signaling between parent-task (sendig signal) and sub-task (waiting for signal) using a condition variable. I hope fibers can help. regards, Oliver