Control.Monad.Par.IO

This module is an alternative version of Control.Monad.Par in which the Par type provides IO operations, by means of liftIO. The price paid is that only runParIO is available, not the pure runPar.

This module uses the same default scheduler as Control.Monad.Par, and tasks scheduled by the two can share the same pool of worker threads.

Documentation

data ParIO a

A wrapper around an underlying Par type which allows IO.

Instances

Monad ParIO

Functor ParIO

Applicative ParIO

MonadIO ParIO

ParFuture IVar ParIO

ParIVar IVar ParIO

data IVar a

Instances

ParFuture IVar Par

ParFuture IVar ParIO

ParIVar IVar Par

ParIVar IVar ParIO

ParUnsafe IVar Par

NFData (IVar a)

runParIO :: ParIO a -> IO a

A run method which allows actual IO to occur on top of the Par monad. Of course this means that all the normal problems of parallel IO computations are present, including nondeterminsm.

A simple example program:

  runParIO (liftIO$ putStrLn "hi" :: ParIO ())