make exit() overridable, for use in DLLs

[ghc-hetmet.git] / rts / RtsStartup.c

diff --git a/rts/RtsStartup.c b/rts/RtsStartup.c
index 33c742b..3fef259 100644 (file)
--- a/rts/RtsStartup.c
+++ b/rts/RtsStartup.c
@@ -459,6 +459,8 @@ shutdownHaskellAndExit(int n)
 static int exit_started=rtsFalse;
 #endif
 
+void (*exitFn)(int) = 0;
+
 void  
 stg_exit(int n)
 { 
@@ -471,5 +473,7 @@ stg_exit(int n)
   IF_PAR_DEBUG(verbose, debugBelch("==-- stg_exit %d on [%x]...", n, mytid));
   shutdownParallelSystem(n);
 #endif
+  if (exitFn)
+    (*exitFn)(n);
   exit(n);
 }