%
-% (c) The University of Glasgow, 2000
+% (c) The University of Glasgow, 2000-2006
%
-- ---------------------------------------------------------------------------
Primarily, this module consists of an interface to the C-land dynamic linker.
\begin{code}
-{-# OPTIONS -#include "Linker.h" #-}
-
module ObjLink (
initObjLinker, -- :: IO ()
loadDLL, -- :: String -> IO (Maybe String)
loadObj, -- :: String -> IO ()
unloadObj, -- :: String -> IO ()
+ insertSymbol, -- :: String -> String -> Ptr a -> IO ()
lookupSymbol, -- :: String -> IO (Maybe (Ptr a))
resolveObjs -- :: IO SuccessFlag
) where
-import Monad ( when )
-
-import Foreign.C
-import Foreign ( Ptr, nullPtr )
-import Panic ( panic )
+import Panic
import BasicTypes ( SuccessFlag, successIf )
import Config ( cLeadingUnderscore )
-import Outputable
+
+import Control.Monad ( when )
+import Foreign.C
+import Foreign ( nullPtr )
+import GHC.Exts ( Ptr(..) )
+
+
-- ---------------------------------------------------------------------------
-- RTS Linker Interface
-- ---------------------------------------------------------------------------
+insertSymbol :: String -> String -> Ptr a -> IO ()
+insertSymbol obj_name key symbol
+ = let str = prefixUnderscore key
+ in withCString obj_name $ \c_obj_name ->
+ withCString str $ \c_str ->
+ c_insertSymbol c_obj_name c_str symbol
+
lookupSymbol :: String -> IO (Maybe (Ptr a))
lookupSymbol str_in = do
let str = prefixUnderscore str_in
loadObj str = do
withCString str $ \c_str -> do
r <- c_loadObj c_str
- when (r == 0) (panic "loadObj: failed")
+ when (r == 0) (panic ("loadObj " ++ show str ++ ": failed"))
unloadObj :: String -> IO ()
unloadObj str =
withCString str $ \c_str -> do
r <- c_unloadObj c_str
- when (r == 0) (panic "unloadObj: failed")
+ when (r == 0) (panic ("unloadObj " ++ show str ++ ": failed"))
resolveObjs :: IO SuccessFlag
resolveObjs = do
return (successIf (r /= 0))
-- ---------------------------------------------------------------------------
--- Foreign declaractions to RTS entry points which does the real work;
+-- Foreign declarations to RTS entry points which does the real work;
-- ---------------------------------------------------------------------------
-#if __GLASGOW_HASKELL__ >= 504
foreign import ccall unsafe "addDLL" c_addDLL :: CString -> IO CString
foreign import ccall unsafe "initLinker" initObjLinker :: IO ()
+foreign import ccall unsafe "insertSymbol" c_insertSymbol :: CString -> CString -> Ptr a -> IO ()
foreign import ccall unsafe "lookupSymbol" c_lookupSymbol :: CString -> IO (Ptr a)
foreign import ccall unsafe "loadObj" c_loadObj :: CString -> IO Int
foreign import ccall unsafe "unloadObj" c_unloadObj :: CString -> IO Int
foreign import ccall unsafe "resolveObjs" c_resolveObjs :: IO Int
-#else
-foreign import "addDLL" unsafe c_addDLL :: CString -> IO CString
-foreign import "initLinker" unsafe initLinker :: IO ()
-foreign import "lookupSymbol" unsafe c_lookupSymbol :: CString -> IO (Ptr a)
-foreign import "loadObj" unsafe c_loadObj :: CString -> IO Int
-foreign import "unloadObj" unsafe c_unloadObj :: CString -> IO Int
-foreign import "resolveObjs" unsafe c_resolveObjs :: IO Int
-#endif
-
\end{code}