Control.Concurrent.Compat

Documentation

module Control.Concurrent

forkFinally :: IO a -> (Either SomeException a -> IO ()) -> IO ThreadId

Fork a thread and call the supplied function when the thread is about to terminate, with an exception or a returned value. The function is called with asynchronous exceptions masked.

forkFinally action and_then =
  mask $ \restore ->
    forkIO $ try (restore action) >>= and_then

This function is useful for informing the parent when a child terminates, for example.

Since: base-4.6.0.0

forkOSWithUnmask :: ((forall a. IO a -> IO a) -> IO ()) -> IO ThreadId

Like forkIOWithUnmask, but the child thread is a bound thread, as with forkOS.