Safe Haskell	Safe-Inferred
Language	Haskell98

Control.Monad.Par.IO

Description

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.

Synopsis

data ParIO a
data IVar a
runParIO :: ParIO a -> IO a

Documentation

data ParIO a Source #

A wrapper around an underlying Par type which allows IO.

Instances

Instances details

MonadFix ParIO Source #
Instance details Defined in Control.Monad.Par.IO Methods mfix :: (a -> ParIO a) -> ParIO a Source #
MonadIO ParIO Source #
Instance details Defined in Control.Monad.Par.IO Methods liftIO :: IO a -> ParIO a Source #
Applicative ParIO Source #
Instance details Defined in Control.Monad.Par.IO Methods pure :: a -> ParIO a Source # (<>) :: ParIO (a -> b) -> ParIO a -> ParIO b Source # liftA2 :: (a -> b -> c) -> ParIO a -> ParIO b -> ParIO c Source # (>) :: ParIO a -> ParIO b -> ParIO b Source # (<*) :: ParIO a -> ParIO b -> ParIO a Source #
Functor ParIO Source #
Instance details Defined in Control.Monad.Par.IO Methods fmap :: (a -> b) -> ParIO a -> ParIO b Source # (<$) :: a -> ParIO b -> ParIO a Source #
Monad ParIO Source #
Instance details Defined in Control.Monad.Par.IO Methods (>>=) :: ParIO a -> (a -> ParIO b) -> ParIO b Source # (>>) :: ParIO a -> ParIO b -> ParIO b Source # return :: a -> ParIO a Source #
ParFuture IVar ParIO Source #
Instance details Defined in Control.Monad.Par.IO Methods spawn :: NFData a => ParIO a -> ParIO (IVar a) Source # spawn_ :: ParIO a -> ParIO (IVar a) Source # get :: IVar a -> ParIO a Source # spawnP :: NFData a => a -> ParIO (IVar a) Source #
ParIVar IVar ParIO Source #
Instance details Defined in Control.Monad.Par.IO Methods fork :: ParIO () -> ParIO () Source # new :: ParIO (IVar a) Source # put :: NFData a => IVar a -> a -> ParIO () Source # put_ :: IVar a -> a -> ParIO () Source # newFull :: NFData a => a -> ParIO (IVar a) Source # newFull_ :: a -> ParIO (IVar a) Source #

data IVar a Source #

Instances

Instances details

ParFuture IVar ParIO Source #
Instance details Defined in Control.Monad.Par.IO Methods spawn :: NFData a => ParIO a -> ParIO (IVar a) Source # spawn_ :: ParIO a -> ParIO (IVar a) Source # get :: IVar a -> ParIO a Source # spawnP :: NFData a => a -> ParIO (IVar a) Source #
ParFuture IVar Par Source #
Instance details Defined in Control.Monad.Par.Scheds.Trace Methods spawn :: NFData a => Par a -> Par (IVar a) Source # spawn_ :: Par a -> Par (IVar a) Source # get :: IVar a -> Par a Source # spawnP :: NFData a => a -> Par (IVar a) Source #
ParIVar IVar ParIO Source #
Instance details Defined in Control.Monad.Par.IO Methods fork :: ParIO () -> ParIO () Source # new :: ParIO (IVar a) Source # put :: NFData a => IVar a -> a -> ParIO () Source # put_ :: IVar a -> a -> ParIO () Source # newFull :: NFData a => a -> ParIO (IVar a) Source # newFull_ :: a -> ParIO (IVar a) Source #
ParIVar IVar Par Source #
Instance details Defined in Control.Monad.Par.Scheds.Trace Methods fork :: Par () -> Par () Source # new :: Par (IVar a) Source # put :: NFData a => IVar a -> a -> Par () Source # put_ :: IVar a -> a -> Par () Source # newFull :: NFData a => a -> Par (IVar a) Source # newFull_ :: a -> Par (IVar a) Source #
NFData (IVar a) Source #
Instance details Defined in Control.Monad.Par.Scheds.TraceInternal Methods rnf :: IVar a -> () Source #
Eq (IVar a) Source #	Equality for IVars is physical equality, as with other reference types.
Instance details Defined in Control.Monad.Par.Scheds.TraceInternal Methods (==) :: IVar a -> IVar a -> Bool Source # (/=) :: IVar a -> IVar a -> Bool Source #

runParIO :: ParIO a -> IO a Source #

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 ())