Patch: win32 GC changes

[Anthony Green]

This patch does two things...

(1) It makes sure GC_write_cs is initialized before any possible use.
Without this patch it is possible for GC_write to happen before initializing
the critical section.  I don't know what this would do on a real win32 
platform, but it causes a hang under wine.

(2) It disables the use of getenv() for win32 targets.  I don't know how 
Microsoft targets work, but wine's getenv returns empty strings when the
environment variable is not set.  This is probably a bug in wine.

These patches are necessary in order to get a mingw HelloWorld running 
on Linux with wine.

Ok for trunk and branch?

AG


2002-03-10  Anthony Green  <green@redhat.com>

	* misc.c (GC_init_inner): Initialize GC_write_cs before use.
	* configure.in: Disable use of getenv for win32 targets (some of
	which have broken implementations).
	* configure: Rebuilt.


Index: boehm-gc/configure.in
===================================================================
RCS file: /cvs/gcc/gcc/boehm-gc/configure.in,v
retrieving revision 1.39
diff -c -r1.39 configure.in
*** configure.in	2002/02/12 18:40:38	1.39
--- configure.in	2002/03/10 18:04:57
***************
*** 109,114 ****
--- 109,115 ----
      ;;
   win32)
      AC_DEFINE(GC_WIN32_THREADS)
+     AC_DEFINE(NO_GETENV)
      ;;
   decosf1 | irix | mach | os2 | solaris | dce | vxworks)
      AC_MSG_ERROR(thread package $THREADS not yet supported)
Index: boehm-gc/misc.c
===================================================================
RCS file: /cvs/gcc/gcc/boehm-gc/misc.c,v
retrieving revision 1.21
diff -c -r1.21 misc.c
*** misc.c	2002/02/12 04:37:53	1.21
--- misc.c	2002/03/10 18:04:57
***************
*** 499,504 ****
--- 499,508 ----
  #   ifdef PRINTSTATS
        GC_print_stats = 1;
  #   endif
+ #   if defined(MSWIN32) || defined(MSWINCE)
+ 	InitializeCriticalSection(&GC_write_cs);
+ #   endif
+ 
      if (0 != GETENV("GC_PRINT_STATS")) {
        GC_print_stats = 1;
      } 
***************
*** 536,544 ****
      if (ALIGNMENT > GC_DS_TAGS && EXTRA_BYTES != 0) {
        GC_obj_kinds[NORMAL].ok_descriptor = ((word)(-ALIGNMENT) | GC_DS_LENGTH);
      }
- #   if defined(MSWIN32) || defined(MSWINCE)
- 	InitializeCriticalSection(&GC_write_cs);
- #   endif
      GC_setpagesize();
      GC_exclude_static_roots(beginGC_arrays, endGC_arrays);
      GC_exclude_static_roots(beginGC_obj_kinds, endGC_obj_kinds);
--- 540,545 ----