/* -----------------------------------------------------------------------------
- * $Id: RtsStartup.c,v 1.67 2002/12/11 15:36:48 simonmar Exp $
+ * $Id: RtsStartup.c,v 1.68 2003/01/28 16:30:06 simonmar Exp $
*
- * (c) The GHC Team, 1998-2000
+ * (c) The GHC Team, 1998-2002
*
* Main function for a standalone Haskell program.
*
#include <stdlib.h>
-/*
- * Flag Structure
- */
+// Flag Structure
struct RTS_FLAGS RtsFlags;
-static int rts_has_started_up = 0;
-#if defined(PAR)
-ullong startTime = 0;
-#endif
-
-EXTFUN(__stginit_Prelude);
-static void initModules ( void (*)(void) );
-
-void
-setProgArgv(int argc, char *argv[])
-{
- /* 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;
-}
+// Count of how many outstanding hs_init()s there have been.
+static int hs_init_count = 0;
+/* -----------------------------------------------------------------------------
+ Starting up the RTS
+ -------------------------------------------------------------------------- */
void
-startupHaskell(int argc, char *argv[], void (*init_root)(void))
+hs_init(int *argc, char **argv[])
{
- /* To avoid repeated initialisations of the RTS */
- if (rts_has_started_up) {
- /* RTS is up and running, so only run the per-module initialisation code */
- if (init_root) {
- initModules(init_root);
+ hs_init_count++;
+ if (hs_init_count > 1) {
+ // second and subsequent inits are ignored
+ return;
}
- return;
- } else {
- rts_has_started_up=1;
- }
/* The very first thing we do is grab the start time...just in case we're
* collecting timing statistics.
defaultsHook();
/* Parse the flags, separating the RTS flags from the programs args */
- setupRtsFlags(&argc, argv, &rts_argc, rts_argv);
- prog_argc = argc;
- prog_argv = argv;
+ if (argc != NULL && argv != NULL) {
+ setupRtsFlags(argc, *argv, &rts_argc, rts_argv);
+ prog_argc = *argc;
+ prog_argv = *argv;
+ }
#if defined(PAR)
/* NB: this really must be done after processing the RTS flags */
initProfiling1();
#endif
- /* run the per-module initialisation code */
- initModules(init_root);
-
#if defined(PROFILING) || defined(DEBUG)
initProfiling2();
#endif
stat_endInit();
}
+// Compatibility interface
+void
+startupHaskell(int argc, char *argv[], void (*init_root)(void))
+{
+ hs_init(&argc, &argv);
+ hs_add_root(init_root);
+}
+
+
+/* -----------------------------------------------------------------------------
+ Getting the program's arguments.
+
+ This is used by System.Environment.getArgs.
+ -------------------------------------------------------------------------- */
+
+void
+getProgArgv(int *argc, char **argv[])
+{
+ *argc = prog_argc;
+ *argv = prog_argv;
+}
+
/* -----------------------------------------------------------------------------
Per-module initialisation
The code generator inserts a small function "__stginit_<module>" in each
module and calls the registration functions in each of the modules it
- imports. So, if we call "__stginit_PrelMain", each reachable module in the
- program will be registered (because PrelMain.mainIO calls Main.main).
+ imports.
The init* functions are compiled in the same way as STG code,
i.e. without normal C call/return conventions. Hence we must use
/* The init functions use an explicit stack...
*/
#define INIT_STACK_BLOCKS 4
-F_ *init_stack = NULL;
+static F_ *init_stack = NULL;
-static void
-initModules ( void (*init_root)(void) )
+void
+hs_add_root(void (*init_root)(void))
{
bdescr *bd;
#ifdef SMP
#endif
nat init_sp;
+ if (hs_init_count <= 0) {
+ barf("hs_add_root() must be called after hs_init()");
+ }
+
init_sp = 0;
bd = allocGroup(INIT_STACK_BLOCKS);
init_stack = (F_ *)bd->start;
init_stack[init_sp++] = (F_)stg_init_ret;
-// init_stack[init_sp++] = (F_)__stginit_Prelude;
if (init_root != NULL) {
init_stack[init_sp++] = (F_)init_root;
}
}
/* -----------------------------------------------------------------------------
- * Shutting down the RTS - two ways of doing this, one which
- * calls exit(), one that doesn't.
- *
- * (shutdownHaskellAndExit() is called by System.exitWith).
- * -----------------------------------------------------------------------------
- */
-void
-shutdownHaskellAndExit(int n)
-{
- OnExitHook();
- shutdownHaskell();
-#if defined(PAR)
- /* really exit (stg_exit() would call shutdownParallelSystem() again) */
- exit(n);
-#else
- stg_exit(n);
-#endif
-}
+ Shutting down the RTS
+ -------------------------------------------------------------------------- */
void
-shutdownHaskell(void)
+hs_exit(void)
{
- if (!rts_has_started_up)
- return;
- rts_has_started_up=0;
-
- /* start timing the shutdown */
- stat_startExit();
-
- /* stop all running tasks */
- exitScheduler();
+ if (hs_init_count <= 0) {
+ barf("too many hs_exit()s");
+ }
+ hs_init_count--;
+ if (hs_init_count > 0) {
+ // ignore until it's the last one
+ return;
+ }
+ /* start timing the shutdown */
+ stat_startExit();
+
+ /* stop all running tasks */
+ exitScheduler();
+
#if !defined(GRAN)
- /* Finalize any remaining weak pointers */
- finalizeWeakPointersNow();
+ /* Finalize any remaining weak pointers */
+ finalizeWeakPointersNow();
#endif
-
+
#if defined(GRAN)
- /* end_gr_simulation prints global stats if requested -- HWL */
- if (!RtsFlags.GranFlags.GranSimStats.Suppressed)
- end_gr_simulation();
+ /* end_gr_simulation prints global stats if requested -- HWL */
+ if (!RtsFlags.GranFlags.GranSimStats.Suppressed)
+ end_gr_simulation();
#endif
-
- /* stop the ticker */
- stopVirtTimer();
-
- /* reset the standard file descriptors to blocking mode */
- resetNonBlockingFd(0);
- resetNonBlockingFd(1);
- resetNonBlockingFd(2);
+
+ /* stop the ticker */
+ stopVirtTimer();
+
+ /* reset the standard file descriptors to blocking mode */
+ resetNonBlockingFd(0);
+ resetNonBlockingFd(1);
+ resetNonBlockingFd(2);
#if defined(PAR)
- /* controlled exit; good thread! */
- shutdownParallelSystem(0);
-
- /* global statistics in parallel system */
- PAR_TICKY_PAR_END();
+ /* controlled exit; good thread! */
+ shutdownParallelSystem(0);
+
+ /* global statistics in parallel system */
+ PAR_TICKY_PAR_END();
#endif
- /* stop timing the shutdown, we're about to print stats */
- stat_endExit();
-
- /* clean up things from the storage manager's point of view.
- * also outputs the stats (+RTS -s) info.
- */
- exitStorage();
-
+ /* stop timing the shutdown, we're about to print stats */
+ stat_endExit();
+
+ /* clean up things from the storage manager's point of view.
+ * also outputs the stats (+RTS -s) info.
+ */
+ exitStorage();
+
#ifdef RTS_GTK_FRONTPANEL
if (RtsFlags.GcFlags.frontpanel) {
stopFrontPanel();
#endif
#if defined(PROFILING)
- reportCCSProfiling();
+ reportCCSProfiling();
#endif
#if defined(PROFILING) || defined(DEBUG)
- endProfiling();
+ endProfiling();
#endif
#ifdef PROFILING
- // Originally, this was in report_ccs_profiling(). Now, retainer
- // profiling might tack some extra stuff on to the end of this file
- // during endProfiling().
- fclose(prof_file);
+ // Originally, this was in report_ccs_profiling(). Now, retainer
+ // profiling might tack some extra stuff on to the end of this file
+ // during endProfiling().
+ fclose(prof_file);
#endif
-
+
#if defined(TICKY_TICKY)
- if (RtsFlags.TickyFlags.showTickyStats) PrintTickyInfo();
+ if (RtsFlags.TickyFlags.showTickyStats) PrintTickyInfo();
+#endif
+}
+
+// Compatibility interfaces
+void
+shutdownHaskell(void)
+{
+ hs_exit();
+}
+
+void
+shutdownHaskellAndExit(int n)
+{
+ if (hs_init_count == 1) {
+ OnExitHook();
+ hs_exit();
+#if defined(PAR)
+ /* really exit (stg_exit() would call shutdownParallelSystem() again) */
+ exit(n);
+#else
+ stg_exit(n);
#endif
+ }
}
/*
projects / ghc-hetmet.git / commitdiff