[project @ 2002-02-06 15:54:23 by simonpj]

[ghc-hetmet.git] / ghc / compiler / ghci / Linker.lhs

diff --git a/ghc/compiler/ghci/Linker.lhs b/ghc/compiler/ghci/Linker.lhs
index e7fb278..475f707 100644 (file)
--- a/ghc/compiler/ghci/Linker.lhs
+++ b/ghc/compiler/ghci/Linker.lhs
@@ -6,9 +6,6 @@
 \begin{code}
 {-# OPTIONS -#include "Linker.h" #-}
 
--- so that we can see defn of LEADING_UNDERSCORE
-#include "../includes/config.h"
-
 module Linker ( 
    initLinker,  -- :: IO ()
    loadObj,      -- :: String -> IO ()
@@ -18,47 +15,56 @@ module Linker (
    addDLL       -- :: String -> IO (Ptr CChar)
   )  where
 
+import PrelByteArr
+import PrelPack        ( packString )
+
+import Monad            ( when )
+
 import CTypes          ( CChar )
 import Foreign         ( Ptr, nullPtr )
-import PrelByteArr
-import PrelPack        (packString)
 import Panic           ( panic )
+import DriverUtil       ( prefixUnderscore )
 
 -- ---------------------------------------------------------------------------
 -- RTS Linker Interface
 -- ---------------------------------------------------------------------------
 
+lookupSymbol :: String -> IO (Maybe (Ptr a))
 lookupSymbol str_in = do
-#  ifdef LEADING_UNDERSCORE
-   let str = '_':str_in
-#  else
-   let str = str_in
-#  endif
+   let str = prefixUnderscore str_in
    addr <- c_lookupSymbol (packString str)
    if addr == nullPtr
        then return Nothing
        else return (Just addr)
 
+loadObj :: String -> IO ()
 loadObj str = do
    r <- c_loadObj (packString str)
-   if (r == 0)
-       then panic "loadObj: failed"
-       else return ()
+   when (r == 0) (panic "loadObj: failed")
 
+unloadObj :: String -> IO ()
 unloadObj str = do
    r <- c_unloadObj (packString str)
-   if (r == 0)
-       then panic "unloadObj: failed"
-       else return ()
+   when (r == 0) (panic "unloadObj: failed")
 
+resolveObjs :: IO Bool
 resolveObjs = do
    r <- c_resolveObjs
    return (r /= 0)  -- returns True <=> success
 
+addDLL :: String -> String -> IO (Ptr CChar)
 addDLL path lib = do
    maybe_errmsg <- c_addDLL (packString path) (packString lib)
    return maybe_errmsg
 
+
+foreign import "initLinker" unsafe
+   initLinker :: IO ()
+
+-- ---------------------------------------------------------------------------
+-- Foreign declaractions to RTS entry points which does the real work;
+-- ---------------------------------------------------------------------------
+
 type PackedString = ByteArray Int
 
 foreign import "lookupSymbol" unsafe
@@ -73,9 +79,6 @@ foreign import "unloadObj" unsafe
 foreign import "resolveObjs" unsafe
    c_resolveObjs :: IO Int
 
-foreign import "initLinker" unsafe
-   initLinker :: IO ()
-
 foreign import "addDLL" unsafe 
    c_addDLL :: PackedString -> PackedString -> IO (Ptr CChar)
 \end{code}