Safe Haskell	Safe-Inferred
Language	Haskell2010

GHC.Types.ForeignCall

Synopsis

newtype ForeignCall = CCall CCallSpec
isSafeForeignCall :: ForeignCall -> Bool
data Safety
- = PlaySafe
- | PlayInterruptible
- | PlayRisky
playSafe :: Safety -> Bool
playInterruptible :: Safety -> Bool
data CExportSpec = CExportStatic SourceText CLabelString CCallConv
type CLabelString = FastString
isCLabelString :: CLabelString -> Bool
pprCLabelString :: CLabelString -> SDoc
data CCallSpec = CCallSpec CCallTarget CCallConv Safety
data CCallTarget
- = StaticTarget SourceText CLabelString (Maybe Unit) Bool
- | DynamicTarget
isDynamicTarget :: CCallTarget -> Bool
data CCallConv
- = CCallConv
- | CApiConv
- | StdCallConv
- | PrimCallConv
- | JavaScriptCallConv
defaultCCallConv :: CCallConv
ccallConvToInt :: CCallConv -> Int
ccallConvAttribute :: CCallConv -> SDoc
data Header = Header SourceText FastString
data CType = CType SourceText (Maybe Header) (SourceText, FastString)

Documentation

newtype ForeignCall Source #

Constructors

CCall CCallSpec

Instances

Instances details

Binary ForeignCall Source #
Instance details Defined in GHC.Types.ForeignCall Methods put_ :: BinHandle -> ForeignCall -> IO () Source # put :: BinHandle -> ForeignCall -> IO (Bin ForeignCall) Source # get :: BinHandle -> IO ForeignCall Source #
Outputable ForeignCall Source #
Instance details Defined in GHC.Types.ForeignCall Methods ppr :: ForeignCall -> SDoc Source #
Eq ForeignCall Source #
Instance details Defined in GHC.Types.ForeignCall Methods (==) :: ForeignCall -> ForeignCall -> Bool # (/=) :: ForeignCall -> ForeignCall -> Bool #

isSafeForeignCall :: ForeignCall -> Bool Source #

data Safety Source #

Constructors

PlaySafe

Might invoke Haskell GC, or do a call back, or switch threads, etc. So make sure things are tidy before the call. Additionally, in the threaded RTS we arrange for the external call to be executed by a separate OS thread, i.e., _concurrently_ to the execution of other Haskell threads.

PlayInterruptible

Like PlaySafe, but additionally the worker thread running this foreign call may be unceremoniously killed, so it must be scheduled on an unbound thread.

PlayRisky

None of the above can happen; the call will return without interacting with the runtime system at all. Specifically:

No GC
No call backs
No blocking
No precise exceptions

Instances

Instances details

Data Safety Source #
Instance details Defined in GHC.Types.ForeignCall Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Safety -> c Safety # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Safety # toConstr :: Safety -> Constr # dataTypeOf :: Safety -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Safety) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Safety) # gmapT :: (forall b. Data b => b -> b) -> Safety -> Safety # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Safety -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Safety -> r # gmapQ :: (forall d. Data d => d -> u) -> Safety -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Safety -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Safety -> m Safety # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Safety -> m Safety # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Safety -> m Safety #
Enum Safety Source #
Instance details Defined in GHC.Types.ForeignCall Methods succ :: Safety -> Safety # pred :: Safety -> Safety # toEnum :: Int -> Safety # fromEnum :: Safety -> Int # enumFrom :: Safety -> [Safety] # enumFromThen :: Safety -> Safety -> [Safety] # enumFromTo :: Safety -> Safety -> [Safety] # enumFromThenTo :: Safety -> Safety -> Safety -> [Safety] #
Show Safety Source #
Instance details Defined in GHC.Types.ForeignCall Methods showsPrec :: Int -> Safety -> ShowS # show :: Safety -> String # showList :: [Safety] -> ShowS #
Binary Safety Source #
Instance details Defined in GHC.Types.ForeignCall Methods put_ :: BinHandle -> Safety -> IO () Source # put :: BinHandle -> Safety -> IO (Bin Safety) Source # get :: BinHandle -> IO Safety Source #
Outputable Safety Source #
Instance details Defined in GHC.Types.ForeignCall Methods ppr :: Safety -> SDoc Source #
Eq Safety Source #
Instance details Defined in GHC.Types.ForeignCall Methods (==) :: Safety -> Safety -> Bool # (/=) :: Safety -> Safety -> Bool #
type Anno Safety Source #
Instance details Defined in GHC.Hs.Decls type Anno Safety = SrcSpan

playSafe :: Safety -> Bool Source #

playInterruptible :: Safety -> Bool Source #

data CExportSpec Source #

Constructors

CExportStatic SourceText CLabelString CCallConv

Instances

Instances details

Data CExportSpec Source #
Instance details Defined in GHC.Types.ForeignCall Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> CExportSpec -> c CExportSpec # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c CExportSpec # toConstr :: CExportSpec -> Constr # dataTypeOf :: CExportSpec -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c CExportSpec) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c CExportSpec) # gmapT :: (forall b. Data b => b -> b) -> CExportSpec -> CExportSpec # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> CExportSpec -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> CExportSpec -> r # gmapQ :: (forall d. Data d => d -> u) -> CExportSpec -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> CExportSpec -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> CExportSpec -> m CExportSpec # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> CExportSpec -> m CExportSpec # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> CExportSpec -> m CExportSpec #
Binary CExportSpec Source #
Instance details Defined in GHC.Types.ForeignCall Methods put_ :: BinHandle -> CExportSpec -> IO () Source # put :: BinHandle -> CExportSpec -> IO (Bin CExportSpec) Source # get :: BinHandle -> IO CExportSpec Source #
Outputable CExportSpec Source #
Instance details Defined in GHC.Types.ForeignCall Methods ppr :: CExportSpec -> SDoc Source #
type Anno CExportSpec Source #
Instance details Defined in GHC.Hs.Decls type Anno CExportSpec = SrcSpan

type CLabelString = FastString Source #

isCLabelString :: CLabelString -> Bool Source #

pprCLabelString :: CLabelString -> SDoc Source #

data CCallSpec Source #

Constructors

CCallSpec CCallTarget CCallConv Safety

Instances

Instances details

Binary CCallSpec Source #
Instance details Defined in GHC.Types.ForeignCall Methods put_ :: BinHandle -> CCallSpec -> IO () Source # put :: BinHandle -> CCallSpec -> IO (Bin CCallSpec) Source # get :: BinHandle -> IO CCallSpec Source #
Outputable CCallSpec Source #
Instance details Defined in GHC.Types.ForeignCall Methods ppr :: CCallSpec -> SDoc Source #
Eq CCallSpec Source #
Instance details Defined in GHC.Types.ForeignCall Methods (==) :: CCallSpec -> CCallSpec -> Bool # (/=) :: CCallSpec -> CCallSpec -> Bool #

data CCallTarget Source #

How to call a particular function in C-land.

Constructors

StaticTarget SourceText CLabelString (Maybe Unit) Bool
DynamicTarget

Instances

Instances details

Data CCallTarget Source #
Instance details Defined in GHC.Types.ForeignCall Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> CCallTarget -> c CCallTarget # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c CCallTarget # toConstr :: CCallTarget -> Constr # dataTypeOf :: CCallTarget -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c CCallTarget) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c CCallTarget) # gmapT :: (forall b. Data b => b -> b) -> CCallTarget -> CCallTarget # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> CCallTarget -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> CCallTarget -> r # gmapQ :: (forall d. Data d => d -> u) -> CCallTarget -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> CCallTarget -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> CCallTarget -> m CCallTarget # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> CCallTarget -> m CCallTarget # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> CCallTarget -> m CCallTarget #
Binary CCallTarget Source #
Instance details Defined in GHC.Types.ForeignCall Methods put_ :: BinHandle -> CCallTarget -> IO () Source # put :: BinHandle -> CCallTarget -> IO (Bin CCallTarget) Source # get :: BinHandle -> IO CCallTarget Source #
Eq CCallTarget Source #
Instance details Defined in GHC.Types.ForeignCall Methods (==) :: CCallTarget -> CCallTarget -> Bool # (/=) :: CCallTarget -> CCallTarget -> Bool #

isDynamicTarget :: CCallTarget -> Bool Source #

data CCallConv Source #

Constructors

CCallConv
CApiConv
StdCallConv
PrimCallConv
JavaScriptCallConv

Instances

Instances details

Data CCallConv Source #
Instance details Defined in GHC.Types.ForeignCall Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> CCallConv -> c CCallConv # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c CCallConv # toConstr :: CCallConv -> Constr # dataTypeOf :: CCallConv -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c CCallConv) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c CCallConv) # gmapT :: (forall b. Data b => b -> b) -> CCallConv -> CCallConv # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> CCallConv -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> CCallConv -> r # gmapQ :: (forall d. Data d => d -> u) -> CCallConv -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> CCallConv -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> CCallConv -> m CCallConv # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> CCallConv -> m CCallConv # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> CCallConv -> m CCallConv #
Enum CCallConv Source #
Instance details Defined in GHC.Types.ForeignCall Methods succ :: CCallConv -> CCallConv # pred :: CCallConv -> CCallConv # toEnum :: Int -> CCallConv # fromEnum :: CCallConv -> Int # enumFrom :: CCallConv -> [CCallConv] # enumFromThen :: CCallConv -> CCallConv -> [CCallConv] # enumFromTo :: CCallConv -> CCallConv -> [CCallConv] # enumFromThenTo :: CCallConv -> CCallConv -> CCallConv -> [CCallConv] #
Binary CCallConv Source #
Instance details Defined in GHC.Types.ForeignCall Methods put_ :: BinHandle -> CCallConv -> IO () Source # put :: BinHandle -> CCallConv -> IO (Bin CCallConv) Source # get :: BinHandle -> IO CCallConv Source #
Outputable CCallConv Source #
Instance details Defined in GHC.Types.ForeignCall Methods ppr :: CCallConv -> SDoc Source #
Eq CCallConv Source #
Instance details Defined in GHC.Types.ForeignCall Methods (==) :: CCallConv -> CCallConv -> Bool # (/=) :: CCallConv -> CCallConv -> Bool #
type Anno CCallConv Source #
Instance details Defined in GHC.Hs.Decls type Anno CCallConv = SrcSpan

defaultCCallConv :: CCallConv Source #

ccallConvToInt :: CCallConv -> Int Source #

ccallConvAttribute :: CCallConv -> SDoc Source #

data Header Source #

Constructors

SourceText FastString

Instances

Instances details

Data Header Source #
Instance details Defined in GHC.Types.ForeignCall Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Header -> c Header # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Header # toConstr :: Header -> Constr # dataTypeOf :: Header -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Header) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Header) # gmapT :: (forall b. Data b => b -> b) -> Header -> Header # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Header -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Header -> r # gmapQ :: (forall d. Data d => d -> u) -> Header -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Header -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Header -> m Header # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Header -> m Header # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Header -> m Header #
Binary Header Source #
Instance details Defined in GHC.Types.ForeignCall Methods put_ :: BinHandle -> Header -> IO () Source # put :: BinHandle -> Header -> IO (Bin Header) Source # get :: BinHandle -> IO Header Source #
Outputable Header Source #
Instance details Defined in GHC.Types.ForeignCall Methods ppr :: Header -> SDoc Source #
Eq Header Source #
Instance details Defined in GHC.Types.ForeignCall Methods (==) :: Header -> Header -> Bool # (/=) :: Header -> Header -> Bool #

data CType Source #

A C type, used in CAPI FFI calls

AnnKeywordId : AnnOpen '{-# CTYPE', AnnHeader,AnnVal, AnnClose '#-}',

Constructors

CType SourceText (Maybe Header) (SourceText, FastString)

Instances

Instances details

Data CType Source #
Instance details Defined in GHC.Types.ForeignCall Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> CType -> c CType # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c CType # toConstr :: CType -> Constr # dataTypeOf :: CType -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c CType) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c CType) # gmapT :: (forall b. Data b => b -> b) -> CType -> CType # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> CType -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> CType -> r # gmapQ :: (forall d. Data d => d -> u) -> CType -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> CType -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> CType -> m CType # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> CType -> m CType # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> CType -> m CType #
Binary CType Source #
Instance details Defined in GHC.Types.ForeignCall Methods put_ :: BinHandle -> CType -> IO () Source # put :: BinHandle -> CType -> IO (Bin CType) Source # get :: BinHandle -> IO CType Source #
Outputable CType Source #
Instance details Defined in GHC.Types.ForeignCall Methods ppr :: CType -> SDoc Source #
Eq CType Source #
Instance details Defined in GHC.Types.ForeignCall Methods (==) :: CType -> CType -> Bool # (/=) :: CType -> CType -> Bool #
type Anno CType Source #
Instance details Defined in GHC.Hs.Decls type Anno CType = SrcSpanAnnP