[project @ 2001-09-04 18:29:20 by ken]

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

diff --git a/ghc/rts/Main.c b/ghc/rts/Main.c
index 1c721b7..83fb115 100644 (file)
--- a/ghc/rts/Main.c
+++ b/ghc/rts/Main.c
@@ -1,7 +1,7 @@
 /* -----------------------------------------------------------------------------
- * $Id: Main.c,v 1.14 2000/01/13 14:34:03 hwloidl Exp $
+ * $Id: Main.c,v 1.31 2001/09/04 18:29:21 ken Exp $
  *
- * (c) The GHC Team 1998-1999
+ * (c) The GHC Team 1998-2000
  *
  * Main function for a standalone Haskell program.
  *
@@ -9,11 +9,13 @@
 
 #define COMPILING_RTS_MAIN
 
+#include "PosixSource.h"
 #include "Rts.h"
 #include "RtsAPI.h"
 #include "SchedAPI.h"
 #include "RtsFlags.h"
 #include "RtsUtils.h"
+#include "Prelude.h"
 
 #ifdef DEBUG
 # include "Printer.h"   /* for printing        */
@@ -24,8 +26,8 @@
 #endif
 
 #ifdef PAR
-# include "ParInit.h"
 # include "Parallel.h"
+# include "ParallelRts.h"
 # include "LLC.h"
 #endif
 
@@ -37,18 +39,19 @@
 # include <windows.h>
 #endif
 
+extern void __stginit_PrelMain(void);
 
 /* Hack: we assume that we're building a batch-mode system unless 
  * INTERPRETER is set
  */
-# ifndef INTERPRETER /* Hack */
+#ifndef INTERPRETER /* Hack */
 int main(int argc, char *argv[])
 {
     int exit_status;
     SchedulerStatus status;
     /* all GranSim/GUM init is done in startupHaskell; sets IAmMainThread! */
 
-    startupHaskell(argc,argv);
+    startupHaskell(argc,argv,__stginit_PrelMain);
 
     /* kick off the computation by creating the main thread with a pointer
        to mainIO_closure representing the computation of the overall program;
@@ -63,11 +66,11 @@ int main(int argc, char *argv[])
 
 #  if defined(PAR)
 
-#   if DEBUG
+#   if defined(DEBUG)
     { /* a wait loop to allow attachment of gdb to UNIX threads */
       nat i, j, s;
 
-      for (i=0, s=0; i<RtsFlags.ParFlags.wait; i++)
+      for (i=0, s=0; i<(nat)RtsFlags.ParFlags.wait; i++)
        for (j=0; j<1000000; j++) 
          s += j % 65536;
     }
@@ -76,33 +79,34 @@ int main(int argc, char *argv[])
 #   endif
 
     if (IAmMainThread == rtsTrue) {
-      fprintf(stderr, "Main Thread Started ...\n");
+      IF_PAR_DEBUG(verbose,
+                  fprintf(stderr, "==== [%x] Main Thread Started ...\n", mytid));
 
       /* ToDo: Dump event for the main thread */
-      status = rts_evalIO((StgClosure *)&mainIO_closure, NULL);
+      status = rts_evalIO((HaskellObj)mainIO_closure, NULL);
     } else {
       /* Just to show we're alive */
       IF_PAR_DEBUG(verbose,
-                  fprintf(stderr, "== [%x] Non-Main PE enters scheduler without work ...\n",
+                  fprintf(stderr, "== [%x] Non-Main PE enters scheduler via taskStart() without work ...\n",
                           mytid));
      
       /* all non-main threads enter the scheduler without work */
-      status = schedule( /* nothing */ );
+      taskStart();       
+      status = Success;  // declare victory (see shutdownParallelSystem)
     }
 
 #  elif defined(GRAN)
 
     /* ToDo: Dump event for the main thread */
-    status = rts_evalIO((StgClosure *)&mainIO_closure, NULL);
+    status = rts_evalIO(mainIO_closure, NULL);
 
 #  else /* !PAR && !GRAN */
 
     /* ToDo: want to start with a larger stack size */
-    status = rts_evalIO((StgClosure *)&mainIO_closure, NULL);
+    status = rts_evalIO((HaskellObj)mainIO_closure, NULL);
 
 #  endif /* !PAR && !GRAN */
 
-    // ToDo: update for parallel execution
     /* check the status of the entire Haskell computation */
     switch (status) {
     case Deadlock:
@@ -110,7 +114,7 @@ int main(int argc, char *argv[])
       exit_status = EXIT_DEADLOCK;
       break;
     case Killed:
-      prog_belch("main thread killed");
+      prog_belch("main thread exited (uncaught exception)");
       exit_status = EXIT_KILLED;
       break;
     case Interrupted:
@@ -120,9 +124,16 @@ int main(int argc, char *argv[])
     case Success:
       exit_status = EXIT_SUCCESS;
       break;
+#if defined(PAR)
     case NoStatus:
-      barf("main thread completed with no status");
+      prog_belch("main thread PE killed; probably due to failure of another PE; check /tmp/pvml...");
+      exit_status = EXIT_KILLED;
+      break;
+#endif 
+    default:
+      barf("main thread completed with invalid status");
     }
     shutdownHaskellAndExit(exit_status);
+    return 0; /* never reached, keep gcc -Wall happy */
 }
 # endif /* BATCH_MODE */