[project @ 2003-03-27 08:18:21 by simonpj]

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

diff --git a/ghc/compiler/utils/Panic.lhs b/ghc/compiler/utils/Panic.lhs
index 01d1568..170a7a7 100644 (file)
--- a/ghc/compiler/utils/Panic.lhs
+++ b/ghc/compiler/utils/Panic.lhs
@@ -14,17 +14,37 @@ module Panic
      GhcException(..), ghcError, progName, 
      panic, panic#, assertPanic, trace,
      showException, showGhcException, tryMost,
+     installSignalHandlers,
 
-#if __GLASGOW_HASKELL__ <= 408
-     catchJust, ioErrors, throwTo,
-#endif
+     catchJust, tryJust, ioErrors, throwTo,
    ) where
 
 #include "HsVersions.h"
+#include "config.h"
 
 import Config
 import FastTypes
 
+#ifndef mingw32_HOST_OS
+# if __GLASGOW_HASKELL__ > 504
+import System.Posix.Signals
+# else
+import Posix           ( Handler(Catch), installHandler, sigINT, sigQUIT )
+# endif /* GHC > 504 */
+
+import CONCURRENT      ( myThreadId )
+#endif /* mingw32_HOST_OS */
+
+# if __GLASGOW_HASKELL__ < 500
+import EXCEPTION        ( raiseInThread )
+# else
+import EXCEPTION       ( throwTo )
+# endif /* GHC < 500 */
+
+#if __GLASGOW_HASKELL__ > 408
+import EXCEPTION       ( catchJust, tryJust, ioErrors )
+#endif
+
 import DYNAMIC
 import qualified EXCEPTION as Exception
 import TRACE           ( trace )
@@ -155,7 +175,25 @@ Compatibility stuff:
 \begin{code}
 #if __GLASGOW_HASKELL__ <= 408
 catchJust = Exception.catchIO
+tryJust   = Exception.tryIO
 ioErrors  = Exception.justIoErrors
 throwTo   = Exception.raiseInThread
 #endif
 \end{code}
+
+Standard signal handlers for catching ^C, which just throw an
+exception in the main thread.  NOTE: must be called from the main
+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
+  return ()
+\end{code}