Hi, I have add the fork_after function to Boost.InterThreads. The prototype allows to execute asynchronously N functions and execute asynchronously a function that depends on the completion of N functions. bith::shared_launcher ae; BOOST_AUTO(actT, bith::fork_all(ae, fct1, fct2)); BOOST_AUTO(act, bith::fork_after(ae, fct3, actT)); act.wait(); bith::shared_launcher is an asynchronous executor (AE) that executes asynchronously a function on a new thread. bith::fork_all request the AE to execute asynchronously each function. It returns a fusion tuple of the asynchronous completion token (ACT) associated the the ae. bith::fork_after request the AE to execute a function asynchronously once each one of ACTs in the dependency tuple parameter are ready. It is similar to the async_with_dependencies proposed Peter Dimov. I have used for that Boost.Future (Anthony proposal). I've added also some act traits, as value type, is movable, has_future_if, has_thread_if. The library is available at Boost Sandbox: https://svn.boost.org/svn/boost/sandbox/interthreads and Boost Vault: http://www.boostpro.com/vault/index.php?action=downloadfile&filename=interthreads.zip&directory=Concurrent%20Programming& Includes every thing on the Sandbox + Html documentation + Boost.Futures + Boost.ThreadPool adaptations I'd appreciate it if people could take a look, test it on their compiler and give me some feedback. Best regrads, Vicente _____________________ Vicente Juan Botet Escribá