| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
Haxl.Core.Parallel
Contents
Description
Psuedo-parallel operations. Most users should import Haxl.Core instead.
Synopsis
- biselect :: GenHaxl u w (Either a b) -> GenHaxl u w (Either a c) -> GenHaxl u w (Either a (b, c))
- pAnd :: GenHaxl u w Bool -> GenHaxl u w Bool -> GenHaxl u w Bool
- pOr :: GenHaxl u w Bool -> GenHaxl u w Bool -> GenHaxl u w Bool
- unsafeChooseFirst :: GenHaxl u w a -> GenHaxl u w b -> GenHaxl u w (Either a b)
Parallel operations
biselect :: GenHaxl u w (Either a b) -> GenHaxl u w (Either a c) -> GenHaxl u w (Either a (b, c)) Source #
pAnd :: GenHaxl u w Bool -> GenHaxl u w Bool -> GenHaxl u w Bool infixr 5 Source #
Parallel version of (.&&). Both arguments are evaluated in
parallel, and if either returns False then the other is
not evaluated any further.
WARNING: exceptions may be unpredictable when using pAnd. If one
argument returns False before the other completes, then pAnd
returns False immediately, ignoring a possible exception that
the other argument may have produced if it had been allowed to
complete.
pOr :: GenHaxl u w Bool -> GenHaxl u w Bool -> GenHaxl u w Bool infixr 4 Source #
Parallel version of (.||). Both arguments are evaluated in
parallel, and if either returns True then the other is
not evaluated any further.
WARNING: exceptions may be unpredictable when using pOr. If one
argument returns True before the other completes, then pOr
returns True immediately, ignoring a possible exception that
the other argument may have produced if it had been allowed to
complete.
unsafeChooseFirst :: GenHaxl u w a -> GenHaxl u w b -> GenHaxl u w (Either a b) Source #
This function takes two haxl computations as input, and returns the output of whichever computation finished first. This is clearly non-deterministic in its output and exception behavior, be careful when using it.