[project @ 2005-01-28 12:55:17 by simonmar]

[ghc-hetmet.git] / ghc / compiler / utils / Panic.lhs

diff --git a/ghc/compiler/utils/Panic.lhs b/ghc/compiler/utils/Panic.lhs
index b47ff7f..6251d1b 100644 (file)
--- a/ghc/compiler/utils/Panic.lhs
+++ b/ghc/compiler/utils/Panic.lhs
@@ -12,17 +12,15 @@ some unnecessary loops in the module dependency graph.
 module Panic  
    ( 
      GhcException(..), ghcError, progName, 
+     pgmError,
      panic, panic#, assertPanic, trace,
      showException, showGhcException, tryMost,
-     installSignalHandlers,
+     installSignalHandlers, 
 
-#if __GLASGOW_HASKELL__ <= 408
-     catchJust, ioErrors, throwTo,
-#endif
+     catchJust, tryJust, ioErrors, throwTo,
    ) where
 
 #include "HsVersions.h"
-#include "config.h"
 
 import Config
 import FastTypes
@@ -32,17 +30,24 @@ import FastTypes
 import System.Posix.Signals
 # else
 import Posix           ( Handler(Catch), installHandler, sigINT, sigQUIT )
-# endif
+# endif /* GHC > 504 */
+#endif /* mingw32_HOST_OS */
 
-import CONCURRENT      ( myThreadId )
+#if defined(mingw32_HOST_OS) && __GLASGOW_HASKELL__ >= 603
+import GHC.ConsoleHandler
+#endif
 
 # if __GLASGOW_HASKELL__ < 500
 import EXCEPTION        ( raiseInThread )
 # else
 import EXCEPTION       ( throwTo )
-# endif
+# endif /* GHC < 500 */
+
+#if __GLASGOW_HASKELL__ > 408
+import EXCEPTION       ( catchJust, tryJust, ioErrors )
 #endif
 
+import CONCURRENT      ( myThreadId )
 import DYNAMIC
 import qualified EXCEPTION as Exception
 import TRACE           ( trace )
@@ -119,17 +124,24 @@ showGhcException (Panic s)
                 ++ "to glasgow-haskell-bugs@haskell.org,\n"
                 ++ "or http://sourceforge.net/projects/ghc/.\n\n")
 
+#if __GLASGOW_HASKELL__ < 603
+myMkTyConApp = mkAppTy
+#else 
+myMkTyConApp = mkTyConApp
+#endif
+
 ghcExceptionTc = mkTyCon "GhcException"
 {-# NOINLINE ghcExceptionTc #-}
 instance Typeable GhcException where
-  typeOf _ = mkAppTy ghcExceptionTc []
+  typeOf _ = myMkTyConApp ghcExceptionTc []
 \end{code}
 
 Panics and asserts.
 
 \begin{code}
-panic :: String -> a
-panic x = Exception.throwDyn (Panic x)
+panic, pgmError :: String -> a
+panic    x = Exception.throwDyn (Panic x)
+pgmError x = Exception.throwDyn (ProgramError x)
 
 -- #-versions because panic can't return an unboxed int, and that's
 -- what TAG_ is with GHC at the moment.  Ugh. (Simon)
@@ -173,6 +185,7 @@ Compatibility stuff:
 \begin{code}
 #if __GLASGOW_HASKELL__ <= 408
 catchJust = Exception.catchIO
+tryJust   = Exception.tryIO
 ioErrors  = Exception.justIoErrors
 throwTo   = Exception.raiseInThread
 #endif
@@ -185,12 +198,28 @@ thread.
 \begin{code}
 installSignalHandlers :: IO ()
 installSignalHandlers = do
-#ifndef mingw32_HOST_OS
   main_thread <- myThreadId
-  let sig_handler = Catch (throwTo main_thread 
-                               (Exception.DynException (toDyn Interrupted)))
-  installHandler sigQUIT sig_handler Nothing 
-  installHandler sigINT  sig_handler Nothing
-#endif
+  let
+      interrupt_exn = Exception.DynException (toDyn Interrupted)
+      interrupt = throwTo main_thread interrupt_exn
+  --
+#if !defined(mingw32_HOST_OS)
+  installHandler sigQUIT (Catch interrupt) Nothing 
+  installHandler sigINT  (Catch interrupt) Nothing
   return ()
+#elif __GLASGOW_HASKELL__ >= 603
+  -- GHC 6.3+ has support for console events on Windows
+  -- NOTE: running GHCi under a bash shell for some reason requires
+  -- you to press Ctrl-Break rather than Ctrl-C to provoke
+  -- an interrupt.  Ctrl-C is getting blocked somewhere, I don't know
+  -- why --SDM 17/12/2004
+  let sig_handler ControlC = interrupt
+      sig_handler Break    = interrupt
+      sig_handler _        = return ()
+
+  installHandler (Catch sig_handler)
+  return ()
+#else
+  return () -- nothing
+#endif
 \end{code}