Foreign.C.ConstPtr

Copyright (c) GHC Developers
License BSD-style (see the file libraries/base/LICENSE)
Maintainer ffi@haskell.org
Stability provisional
Portability portable
Safe Haskell Safe
Language Haskell2010

Description

This module provides typed const pointers to foreign data. It is part of the Foreign Function Interface (FFI).

newtype ConstPtr a Source

A pointer with the C const qualifier. For instance, an argument of type ConstPtr CInt would be marshalled as const int*.

While const-ness generally does not matter for ccall imports (since const and non-const pointers typically have equivalent calling conventions), it does matter for capi imports. See GHC #22043.

Since: base-4.18.0.0

Constructors

ConstPtr

Fields

Instances
Instances details
Data a => Data (ConstPtr a) Source

Since: base-4.18.0.0
Instance details

Defined in GHC.Internal.Data.Data

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> ConstPtr a -> c (ConstPtr a) Source

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (ConstPtr a) Source

toConstr :: ConstPtr a -> Constr Source

dataTypeOf :: ConstPtr a -> DataType Source

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (ConstPtr a)) Source

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (ConstPtr a)) Source

gmapT :: (forall b. Data b => b -> b) -> ConstPtr a -> ConstPtr a Source

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> ConstPtr a -> r Source

gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> ConstPtr a -> r Source

gmapQ :: (forall d. Data d => d -> u) -> ConstPtr a -> [u] Source

gmapQi :: Int -> (forall d. Data d => d -> u) -> ConstPtr a -> u Source

gmapM :: Monad m => (forall d. Data d => d -> m d) -> ConstPtr a -> m (ConstPtr a) Source

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> ConstPtr a -> m (ConstPtr a) Source

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> ConstPtr a -> m (ConstPtr a) Source

Storable (ConstPtr a) Source
Instance details

Defined in GHC.Internal.Foreign.Storable

Methods

sizeOf :: ConstPtr a -> Int Source

alignment :: ConstPtr a -> Int Source

peekElemOff :: Ptr (ConstPtr a) -> Int -> IO (ConstPtr a) Source

pokeElemOff :: Ptr (ConstPtr a) -> Int -> ConstPtr a -> IO () Source

peekByteOff :: Ptr b -> Int -> IO (ConstPtr a) Source

pokeByteOff :: Ptr b -> Int -> ConstPtr a -> IO () Source

peek :: Ptr (ConstPtr a) -> IO (ConstPtr a) Source

poke :: Ptr (ConstPtr a) -> ConstPtr a -> IO () Source

Show (ConstPtr a) Source
Instance details

Defined in GHC.Internal.Foreign.C.ConstPtr

Methods

showsPrec :: Int -> ConstPtr a -> ShowS Source

show :: ConstPtr a -> String Source

showList :: [ConstPtr a] -> ShowS Source

Eq (ConstPtr a) Source
Instance details

Defined in GHC.Internal.Foreign.C.ConstPtr

Methods

(==) :: ConstPtr a -> ConstPtr a -> Bool Source

(/=) :: ConstPtr a -> ConstPtr a -> Bool Source

Ord (ConstPtr a) Source
Instance details

Defined in GHC.Internal.Foreign.C.ConstPtr

Methods

compare :: ConstPtr a -> ConstPtr a -> Ordering Source

(<) :: ConstPtr a -> ConstPtr a -> Bool Source

(<=) :: ConstPtr a -> ConstPtr a -> Bool Source

(>) :: ConstPtr a -> ConstPtr a -> Bool Source

(>=) :: ConstPtr a -> ConstPtr a -> Bool Source

max :: ConstPtr a -> ConstPtr a -> ConstPtr a Source

min :: ConstPtr a -> ConstPtr a -> ConstPtr a Source

© The University of Glasgow and others
Licensed under a BSD-style license (see top of the page).
https://downloads.haskell.org/~ghc/9.12.1/docs/libraries/base-4.21.0.0-8e62/Foreign-C-ConstPtr.html