[project @ 2000-04-11 16:51:44 by sewardj]

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

diff --git a/ghc/rts/RtsStartup.c b/ghc/rts/RtsStartup.c
index e02426a..164d3d9 100644 (file)
--- a/ghc/rts/RtsStartup.c
+++ b/ghc/rts/RtsStartup.c
@@ -1,7 +1,7 @@
 /* -----------------------------------------------------------------------------
- * $Id: RtsStartup.c,v 1.32 2000/03/09 11:49:34 simonmar Exp $
+ * $Id: RtsStartup.c,v 1.41 2000/04/11 16:51:44 sewardj Exp $
  *
- * (c) The GHC Team, 1998-1999
+ * (c) The GHC Team, 1998-2000
  *
  * Main function for a standalone Haskell program.
  *
@@ -21,9 +21,10 @@
 #include "Ticky.h"
 #include "StgRun.h"
 #include "StgStartup.h"
+#include "Prelude.h"           /* fixupRTStoPreludeRefs */
 
 #if defined(PROFILING) || defined(DEBUG)
-# include "ProfRts.h"
+# include "Profiling.h"
 # include "ProfHeap.h"
 #endif
 
@@ -48,15 +49,32 @@ static int rts_has_started_up = 0;
 static ullong startTime = 0;
 #endif
 
-static void initModules ( void );
+EXTFUN(__init_Prelude);
+static void initModules ( void * );
 
 void
-startupHaskell(int argc, char *argv[])
+setProgArgv(int argc, char *argv[])
 {
-#ifdef ENABLE_WIN32_DLL_SUPPORT
-    int i;
-#endif
+   /* Usually this is done by startupHaskell, so we don't need to call this. 
+      However, sometimes Hugs wants to change the arguments which Haskell
+      getArgs >>= ... will be fed.  So you can do that by calling here
+      _after_ calling startupHaskell.
+   */
+   prog_argc = argc;
+   prog_argv = argv;
+}
+
+void
+getProgArgv(int *argc, char **argv[])
+{
+   *argc = prog_argc;
+   *argv = prog_argv;
+}
 
+
+void
+startupHaskell(int argc, char *argv[], void *init_root)
+{
     /* To avoid repeated initialisations of the RTS */
    if (rts_has_started_up)
      return;
@@ -134,7 +152,7 @@ startupHaskell(int argc, char *argv[])
 
     /* run the per-module initialisation code */
 #if !defined(INTERPRETER)
-    initModules();
+    initModules(init_root);
 #endif
 
 #if defined(PROFILING) || defined(DEBUG)
@@ -160,21 +178,14 @@ startupHaskell(int argc, char *argv[])
     init_default_handlers();
 #endif
  
-    /* When the RTS and Prelude live in separate DLLs,
-       we need to patch up the char- and int-like tables
-       that the RTS keep after both DLLs have been loaded,
-       filling in the tables with references to where the
-       static info tables have been loaded inside the running
-       process.
+#if !defined(INTERPRETER)
+    /* Initialise pointers from the RTS to the prelude.  
+       Only for compiled code -- the interpreter
+       will call this itself later, so don't do so now.
     */
-#ifdef ENABLE_WIN32_DLL_SUPPORT
-    for(i=0;i<=255;i++)
-       (CHARLIKE_closure[i]).header.info = (const StgInfoTable*)&Czh_static_info;
-
-    for(i=0;i<=32;i++)
-       (INTLIKE_closure[i]).header.info = (const StgInfoTable*)&Izh_static_info;
-       
+    fixupRTStoPreludeRefs(NULL);
 #endif
+
     /* Record initialization times */
     end_init();
 }
@@ -195,32 +206,38 @@ startupHaskell(int argc, char *argv[])
       - we supply a unique integer to each statically declared cost
         centre and cost centre stack in the program.
 
-   The code generator inserts a small function "__init_<moddule>" in each
+   The code generator inserts a small function "__init_<module>" in each
    module and calls the registration functions in each of the modules
-   it imports.  So, if we call "__init_Main", each reachable module in the
-   program will be registered.
+   it imports.  So, if we call "__init_PrelMain", each reachable module in the
+   program will be registered (because PrelMain.mainIO calls Main.main).
 
    The init* functions are compiled in the same way as STG code,
    i.e. without normal C call/return conventions.  Hence we must use
    StgRun to call this stuff.
    -------------------------------------------------------------------------- */
 
-#ifndef INTERPRETER
-
 /* The init functions use an explicit stack... 
  */
 #define INIT_STACK_SIZE  (BLOCK_SIZE * 4)
-F_ *init_stack;
+F_ *init_stack = NULL;
+nat init_sp = 0;
 
+#ifndef INTERPRETER
 static void
-initModules ( void )
+initModules ( void *init_root )
 {
-  /* this storage will be reclaimed by the garbage collector,
-   * as a large block.
-   */
-  init_stack = (F_ *)allocate(INIT_STACK_SIZE / sizeof(W_));
-
-  StgRun((StgFunPtr)stg_init, NULL/* no reg table */);
+    Capability cap;
+
+    init_sp = 0;
+    init_stack = (F_ *)allocate(INIT_STACK_SIZE / sizeof(W_));
+    init_stack[init_sp++] = (F_)stg_init_ret;
+    init_stack[init_sp++] = (F_)__init_Prelude;
+    if (init_root != NULL) {
+       init_stack[init_sp++] = (F_)init_root;
+    }
+    
+    cap.rSp = (P_)(init_stack + init_sp);
+    StgRun((StgFunPtr)stg_init, &cap);
 }
 
 #endif /* !INTERPRETER */
@@ -271,6 +288,10 @@ shutdownHaskell(void)
   resetNonBlockingFd(1);
   resetNonBlockingFd(2);
 
+#if defined(PAR)
+  shutdownParallelSystem(0);
+#endif
+
   /* stop timing the shutdown, we're about to print stats */
   stat_endExit();
 
@@ -293,10 +314,6 @@ shutdownHaskell(void)
 
   rts_has_started_up=0;
 
-#if defined(PAR)
-  shutdownParallelSystem(0);
-#endif
-
 }
 
 /*