abstract-par-0.3: Type classes generalizing the functionality of the 'monad-par' library.

Safe HaskellSafe-Infered

Control.Monad.Par.Unsafe

Description

Unsafe operations. NOT part of Safe Haskell.

These are unsafe (in the normal, Haskell sense) when used with a runPar of type `Par a -> a`. If used with a runParIO that stays in the IO monad, then they are simply dangerous.

For the purposes of Safe Haskell, any module that imports this module becomes untrustworthy.

Synopsis

Documentation

class ParUnsafe iv p | p -> iv where

The class of Par monads that provide unsafe functionality.

Methods

unsafePeek :: iv a -> p (Maybe a)

Peek at the current contents of an IVar in a nonblocking way.

unsafeTryPut :: iv a -> a -> p a

Attempt to put a value into an IVar. If successful, return the value put. If something is already there, return it instead.

unsafeParIO :: IO a -> p a

Lift an IO operation into the Par monad.