License	BSD-style
Maintainer	Vincent Hanquez <vincent@snarc.org>
Stability	experimental
Portability	portable
Safe Haskell	Safe-Inferred
Language	Haskell2010

Basement.FinalPtr

Description

A smaller ForeignPtr reimplementation that work in any prim monad.

Here be dragon.

Synopsis

data FinalPtr a
- = FinalPtr (Ptr a)
- | FinalForeign (ForeignPtr a)
finalPtrSameMemory :: FinalPtr a -> FinalPtr b -> Bool
castFinalPtr :: FinalPtr a -> FinalPtr b
toFinalPtr :: PrimMonad prim => Ptr a -> (Ptr a -> IO ()) -> prim (FinalPtr a)
toFinalPtrForeign :: ForeignPtr a -> FinalPtr a
touchFinalPtr :: PrimMonad prim => FinalPtr p -> prim ()
withFinalPtr :: PrimMonad prim => FinalPtr p -> (Ptr p -> prim a) -> prim a
withUnsafeFinalPtr :: PrimMonad prim => FinalPtr p -> (Ptr p -> prim a) -> a
withFinalPtrNoTouch :: FinalPtr p -> (Ptr p -> a) -> a

Documentation

data FinalPtr a Source #

Create a pointer with an associated finalizer

Constructors

FinalPtr (Ptr a)
FinalForeign (ForeignPtr a)

Instances

Instances details

Show (FinalPtr a) Source #
Instance details Defined in Basement.FinalPtr Methods showsPrec :: Int -> FinalPtr a -> ShowS # show :: FinalPtr a -> String # showList :: [FinalPtr a] -> ShowS #
Eq (FinalPtr a) Source #
Instance details Defined in Basement.FinalPtr Methods (==) :: FinalPtr a -> FinalPtr a -> Bool # (/=) :: FinalPtr a -> FinalPtr a -> Bool #
Ord (FinalPtr a) Source #
Instance details Defined in Basement.FinalPtr Methods compare :: FinalPtr a -> FinalPtr a -> Ordering # (<) :: FinalPtr a -> FinalPtr a -> Bool # (<=) :: FinalPtr a -> FinalPtr a -> Bool # (>) :: FinalPtr a -> FinalPtr a -> Bool # (>=) :: FinalPtr a -> FinalPtr a -> Bool # max :: FinalPtr a -> FinalPtr a -> FinalPtr a # min :: FinalPtr a -> FinalPtr a -> FinalPtr a #

finalPtrSameMemory :: FinalPtr a -> FinalPtr b -> Bool Source #

Check if 2 final ptr points on the same memory bits

it stand to reason that provided a final ptr that is still being referenced and thus have the memory still valid, if 2 final ptrs have the same address, they should be the same final ptr

castFinalPtr :: FinalPtr a -> FinalPtr b Source #

Cast a finalized pointer from type a to type b

toFinalPtr :: PrimMonad prim => Ptr a -> (Ptr a -> IO ()) -> prim (FinalPtr a) Source #

create a new FinalPtr from a Pointer

toFinalPtrForeign :: ForeignPtr a -> FinalPtr a Source #

Create a new FinalPtr from a ForeignPtr

touchFinalPtr :: PrimMonad prim => FinalPtr p -> prim () Source #

withFinalPtr :: PrimMonad prim => FinalPtr p -> (Ptr p -> prim a) -> prim a Source #

Looks at the raw pointer inside a FinalPtr, making sure the data pointed by the pointer is not finalized during the call to f

withUnsafeFinalPtr :: PrimMonad prim => FinalPtr p -> (Ptr p -> prim a) -> a Source #

Unsafe version of withFinalPtr

withFinalPtrNoTouch :: FinalPtr p -> (Ptr p -> a) -> a Source #