Hi, I don't know why but my previous email from yesterday did not occur on the mailing list? I've uploaded two versions of my threadpool library - maybe you are interressted in. It provides thread management, queueing and scheduling policies as well chaining of tasks and lazy processing of submited tasks (== processed only if requested). version 1: submit returens a future (Braddock future library) whic his cancelable (remove pending task from queue) version 2: submit returns a task object which provides a interrupt memebr function (task can be interrupted if its is running and cooperative) Both libraries are available at Boost.Vault / Concurrent Programming. so long, Oliver -- Psssst! Schon vom neuen GMX MultiMessenger gehört? Der kann`s mit allen: http://www.gmx.net/de/go/multimessenger