+{-% DrIFT (Automatic class derivations for Haskell) v1.1 %-}
+{-% DrIFT (Automatic class derivations for Haskell) v1.1 %-}
%
% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\begin{code}
module ForeignCall (
ForeignCall(..),
- Safety(..), playSafe,
+ Safety(..), playSafe, playThreadSafe,
CExportSpec(..),
CCallSpec(..),
import CStrings ( CLabelString, pprCLabelString )
import FastString ( FastString )
+import Binary
import Outputable
\end{code}
| DNCall DNCallSpec
deriving( Eq ) -- We compare them when seeing if an interface
-- has changed (for versioning purposes)
+ {-! derive: Binary !-}
-- We may need more clues to distinguish foreign calls
-- but this simple printer will do for now
instance Outputable ForeignCall where
- ppr (CCall cc) = ppr cc
+ ppr (CCall cc) = ppr cc
ppr (DNCall dn) = ppr dn
\end{code}
= PlaySafe -- Might invoke Haskell GC, or do a call back, or
-- switch threads, etc. So make sure things are
-- tidy before the call
+ Bool -- => True, external function is also re-entrant.
+ -- [if supported, RTS arranges for the external call
+ -- to be executed by a separate OS thread, i.e.,
+ -- _concurrently_ to the execution of other Haskell threads.]
| PlayRisky -- None of the above can happen; the call will return
-- without interacting with the runtime system at all
deriving( Eq, Show )
-- Show used just for Show Lex.Token, I think
+ {-! derive: Binary !-}
instance Outputable Safety where
- ppr PlaySafe = empty
+ ppr (PlaySafe False) = ptext SLIT("safe")
+ ppr (PlaySafe True) = ptext SLIT("threadsafe")
ppr PlayRisky = ptext SLIT("unsafe")
-playSafe PlaySafe = True
-playSafe PlayRisky = False
+playSafe :: Safety -> Bool
+playSafe PlaySafe{} = True
+playSafe PlayRisky = False
+
+playThreadSafe :: Safety -> Bool
+playThreadSafe (PlaySafe x) = x
+playThreadSafe _ = False
\end{code}
= CExportStatic -- foreign export ccall foo :: ty
CLabelString -- C Name of exported function
CCallConv
+ {-! derive: Binary !-}
data CCallSpec
= CCallSpec CCallTarget -- What to call
CCallConv -- Calling convention to use.
Safety
deriving( Eq )
+ {-! derive: Binary !-}
\end{code}
The call target:
| DynamicTarget -- First argument (an Addr#) is the function pointer
| CasmTarget CLabelString -- Inline C code (now seriously deprecated)
deriving( Eq )
+ {-! derive: Binary !-}
isDynamicTarget, isCasmTarget :: CCallTarget -> Bool
isDynamicTarget DynamicTarget = True
\begin{code}
data CCallConv = CCallConv | StdCallConv
- deriving( Eq )
+ deriving (Eq)
+ {-! derive: Binary !-}
instance Outputable CCallConv where
- ppr StdCallConv = ptext SLIT("__stdcall")
- ppr CCallConv = ptext SLIT("_ccall")
+ ppr StdCallConv = ptext SLIT("stdcall")
+ ppr CCallConv = ptext SLIT("ccall")
defaultCCallConv :: CCallConv
defaultCCallConv = CCallConv
\begin{code}
data DNCallSpec = DNCallSpec FastString
- deriving( Eq )
+ deriving (Eq)
+ {-! derive: Binary !-}
instance Outputable DNCallSpec where
- ppr (DNCallSpec s) = text "DotNet" <+> ptext s
+ ppr (DNCallSpec s) = char '"' <> ftext s <> char '"'
\end{code}
okToExposeFCall (CCall (CCallSpec target _ _)) = not (isCasmTarget target)
okToExposeFCall other = True
\end{code}
+\begin{code}
+{-* Generated by DrIFT-v1.0 : Look, but Don't Touch. *-}
+instance Binary ForeignCall where
+ put_ bh (CCall aa) = do
+ putByte bh 0
+ put_ bh aa
+ put_ bh (DNCall ab) = do
+ putByte bh 1
+ put_ bh ab
+ get bh = do
+ h <- getByte bh
+ case h of
+ 0 -> do aa <- get bh
+ return (CCall aa)
+ _ -> do ab <- get bh
+ return (DNCall ab)
+
+instance Binary Safety where
+ put_ bh (PlaySafe aa) = do
+ putByte bh 0
+ put_ bh aa
+ put_ bh PlayRisky = do
+ putByte bh 1
+ get bh = do
+ h <- getByte bh
+ case h of
+ 0 -> do aa <- get bh
+ return (PlaySafe aa)
+ _ -> do return PlayRisky
+
+instance Binary CExportSpec where
+ put_ bh (CExportStatic aa ab) = do
+ put_ bh aa
+ put_ bh ab
+ get bh = do
+ aa <- get bh
+ ab <- get bh
+ return (CExportStatic aa ab)
+
+instance Binary CCallSpec where
+ put_ bh (CCallSpec aa ab ac) = do
+ put_ bh aa
+ put_ bh ab
+ put_ bh ac
+ get bh = do
+ aa <- get bh
+ ab <- get bh
+ ac <- get bh
+ return (CCallSpec aa ab ac)
+
+instance Binary CCallTarget where
+ put_ bh (StaticTarget aa) = do
+ putByte bh 0
+ put_ bh aa
+ put_ bh DynamicTarget = do
+ putByte bh 1
+ put_ bh (CasmTarget ab) = do
+ putByte bh 2
+ put_ bh ab
+ get bh = do
+ h <- getByte bh
+ case h of
+ 0 -> do aa <- get bh
+ return (StaticTarget aa)
+ 1 -> do return DynamicTarget
+ _ -> do ab <- get bh
+ return (CasmTarget ab)
+
+instance Binary CCallConv where
+ put_ bh CCallConv = do
+ putByte bh 0
+ put_ bh StdCallConv = do
+ putByte bh 1
+ get bh = do
+ h <- getByte bh
+ case h of
+ 0 -> do return CCallConv
+ _ -> do return StdCallConv
+
+instance Binary DNCallSpec where
+ put_ bh (DNCallSpec aa) = do
+ put_ bh aa
+ get bh = do
+ aa <- get bh
+ return (DNCallSpec aa)
+
+-- Imported from other files :-
+
+\end{code}
projects / ghc-hetmet.git / blobdiff