forkIO package:threads-extras

forkIO :: BoundedThreadGroup -> IO a -> IO (ThreadId, IO (Result a))
threads-extras Control.Concurrent.Thread.BoundedThreadGroup
Same as Control.Concurrent.Thread.Group.forkIO but waits there are less then the max size number of threads.
forkIOWithUnmask :: BoundedThreadGroup -> ((forall b . IO b -> IO b) -> IO a) -> IO (ThreadId, IO (Result a))
threads-extras Control.Concurrent.Thread.BoundedThreadGroup
Same as Control.Concurrent.Thread.Group.forkIOWithUnmask but waits there are less then the max size number of threads.