release the global struct *after* we've finished using it

[perl5.git] / miniperlmain.c

diff --git a/miniperlmain.c b/miniperlmain.c
index 4e9e5e8..61358f7 100644 (file)
--- a/miniperlmain.c
+++ b/miniperlmain.c
@@ -1,7 +1,7 @@
 /*    miniperlmain.c
  *
- *    Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002,
- *    by Larry Wall and others
+ *    Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003,
+ *    2004, 2005, 2006, 2007, by Larry Wall and others
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -9,12 +9,25 @@
  */
 
 /*
- * "The Road goes ever on and on, down from the door where it began."
+ *      The Road goes ever on and on
+ *          Down from the door where it began.
+ *
+ *     [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"]
+ *     [Frodo on p.73 of _The Lord of the Rings_, I/iii: "Three Is Company"]
+ */
+
+/* This file contains the main() function for the perl interpreter.
+ * Note that miniperlmain.c contains main() for the 'miniperl' binary,
+ * while perlmain.c contains main() for the 'perl' binary.
+ *
+ * Miniperl is like perl except that it does not support dynamic loading,
+ * and in fact is used to build the dynamic modules needed for the 'real'
+ * perl executable.
  */
 
 #ifdef OEMVS
 #ifdef MYMALLOC
-/* sbrk is limited to first heap segement so make it big */
+/* sbrk is limited to first heap segment so make it big */
 #pragma runopts(HEAP(8M,500K,ANYWHERE,KEEP,8K,4K) STACK(,,ANY,) ALL31(ON))
 #else
 #pragma runopts(HEAP(2M,500K,ANYWHERE,KEEP,8K,4K) STACK(,,ANY,) ALL31(ON))
@@ -29,34 +42,48 @@
 static void xs_init (pTHX);
 static PerlInterpreter *my_perl;
 
-#if defined (__MINT__) || defined (atarist)
-/* The Atari operating system doesn't have a dynamic stack.  The
-   stack size is determined from this value.  */
-long _stksize = 64 * 1024;
+#if defined(PERL_GLOBAL_STRUCT_PRIVATE)
+/* The static struct perl_vars* may seem counterproductive since the
+ * whole idea PERL_GLOBAL_STRUCT_PRIVATE was to avoid statics, but note
+ * that this static is not in the shared perl library, the globals PL_Vars
+ * and PL_VarsPtr will stay away. */
+static struct perl_vars* my_plvarsp;
+struct perl_vars* Perl_GetVarsPrivate(void) { return my_plvarsp; }
 #endif
 
+#ifdef NO_ENV_ARRAY_IN_MAIN
+extern char **environ;
+int
+main(int argc, char **argv)
+#else
 int
 main(int argc, char **argv, char **env)
+#endif
 {
-    int exitstatus;
-
+    dVAR;
+    int exitstatus, i;
 #ifdef PERL_GLOBAL_STRUCT
-#define PERLVAR(var,type) /**/
-#define PERLVARA(var,type) /**/
-#define PERLVARI(var,type,init) PL_Vars.var = init;
-#define PERLVARIC(var,type,init) PL_Vars.var = init;
-#include "perlvars.h"
-#undef PERLVAR
-#undef PERLVARA
-#undef PERLVARI
-#undef PERLVARIC
+    struct perl_vars *plvarsp = init_global_struct();
+#  ifdef PERL_GLOBAL_STRUCT_PRIVATE
+    my_vars = my_plvarsp = plvarsp;
+#  endif
+#endif /* PERL_GLOBAL_STRUCT */
+#ifndef NO_ENV_ARRAY_IN_MAIN
+    PERL_UNUSED_ARG(env);
 #endif
+#ifndef PERL_USE_SAFE_PUTENV
+    PL_use_safe_putenv = FALSE;
+#endif /* PERL_USE_SAFE_PUTENV */
 
     /* if user wants control of gprof profiling off by default */
     /* noop unless Configure is given -Accflags=-DPERL_GPROF_CONTROL */
     PERL_GPROF_MONCONTROL(0);
 
+#ifdef NO_ENV_ARRAY_IN_MAIN
+    PERL_SYS_INIT3(&argc,&argv,&environ);
+#else
     PERL_SYS_INIT3(&argc,&argv,&env);
+#endif
 
 #if defined(USE_ITHREADS)
     /* XXX Ideally, this should really be happening in perl_alloc() or
@@ -84,13 +111,39 @@ main(int argc, char **argv, char **env)
     exitstatus = perl_parse(my_perl, xs_init, argc, argv, (char **)NULL);
     if (!exitstatus)
         perl_run(my_perl);
-      
+
+#ifndef PERL_MICRO
+    /* Unregister our signal handler before destroying my_perl */
+    for (i = 1; PL_sig_name[i]; i++) {
+       if (rsignal_state(PL_sig_num[i]) == (Sighandler_t) PL_csighandlerp) {
+           rsignal(PL_sig_num[i], (Sighandler_t) SIG_DFL);
+       }
+    }
+#endif
+
     exitstatus = perl_destruct(my_perl);
 
     perl_free(my_perl);
 
+#if defined(USE_ENVIRON_ARRAY) && defined(PERL_TRACK_MEMPOOL) && !defined(NO_ENV_ARRAY_IN_MAIN)
+    /*
+     * The old environment may have been freed by perl_free()
+     * when PERL_TRACK_MEMPOOL is defined, but without having
+     * been restored by perl_destruct() before (this is only
+     * done if destruct_level > 0).
+     *
+     * It is important to have a valid environment for atexit()
+     * routines that are eventually called.
+     */
+    environ = env;
+#endif
+
     PERL_SYS_TERM();
 
+#ifdef PERL_GLOBAL_STRUCT
+    free_global_struct(plvarsp);
+#endif /* PERL_GLOBAL_STRUCT */
+
     exit(exitstatus);
     return exitstatus;
 }
@@ -102,5 +155,16 @@ main(int argc, char **argv, char **env)
 static void
 xs_init(pTHX)
 {
+    PERL_UNUSED_CONTEXT;
     dXSUB_SYS;
 }
+
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 et:
+ */