eliminate need for perl95.exe on Windows 9x by working around CRT

bug internally (from Benjamin Stuhl <sho_pi@hotmail.com>); modified
to call the fixed version of open_osfhandle() only on Windows 9x;
updated the makefiles and README.win32 to suit

p4raw-id: //depot/perl@4892

5 files changed, 80 insertions, 190 deletions

diff --git a/README.win32 b/README.win32
index 1623acf20f..d5adfd7dc2 100644
--- a/README.win32
+++ b/README.win32
@@ -215,21 +215,6 @@ The build process may produce "harmless" compiler warnings (more or
 less copiously, depending on how picky your compiler gets).  The
 maintainers are aware of these warnings, thankyouverymuch. :)
 
-When building using Visual C++, a perl95.exe will also get built.  This
-executable is only needed on Windows95, and should be used instead of
-perl.exe, and then only if you want sockets to work properly on Windows95.
-This is necessitated by a bug in the Microsoft C Runtime that cannot be
-worked around in the "normal" perl.exe.  perl95.exe gets built with its
-own private copy of the C Runtime that is not accessible to extensions
-(which see the DLL version of the CRT).  Be aware, therefore, that this
-perl95.exe will have esoteric problems with extensions like perl/Tk that
-themselves use the C Runtime heavily, or want to free() pointers
-malloc()-ed by perl.
-
-You can avoid the perl95.exe problems completely if you either enable
-USE_PERLCRT with Visual C++, or use Borland C++ for building perl.  In
-those cases, perl95.exe is not needed and will not be built.
-
 =back
 
 =head2 Testing
diff --git a/win32/Makefile b/win32/Makefile
index 2a002550f4..e4f3d86c5e 100644
--- a/win32/Makefile
+++ b/win32/Makefile
@@ -107,7 +107,6 @@ INST_ARCH	= \$(ARCHNAME)
 # Not recommended if you have VC 6.x and you're not running Windows 9x.
 #
 #USE_PERLCRT	= define
-#BUILD_FOR_WIN95    = define
 
 #
 # uncomment to enable linking with setargv.obj under the Visual C
@@ -482,10 +481,6 @@ MAKE		= nmake -nologo
 CFGSH_TMPL	= config.vc
 CFGH_TMPL	= config_H.vc
 
-!IF "$(BUILD_FOR_WIN95)" == "define"
-PERL95EXE	= ..\perl95.exe
-!ENDIF
-
 XCOPY		= xcopy /f /r /i /d
 RCOPY		= xcopy /f /r /i /e /d
 NOOP		= @echo
@@ -549,15 +544,6 @@ WIN32_SRC	= $(WIN32_SRC) .\win32thread.c
 WIN32_SRC	= $(WIN32_SRC) .\$(CRYPT_SRC)
 !ENDIF
 
-PERL95_SRC	=		\
-		perl95.c	\
-		win32mt.c	\
-		win32sckmt.c
-
-!IF "$(CRYPT_SRC)" != ""
-PERL95_SRC	= $(PERL95_SRC) .\$(CRYPT_SRC)
-!ENDIF
-
 DLL_SRC		= $(DYNALOADER).c
 
 X2P_SRC		=		\
@@ -620,7 +606,6 @@ MINICORE_OBJ	= $(MICROCORE_OBJ:..\=.\mini\)	\
 		  $(MINIDIR)\perlio$(o)
 MINIWIN32_OBJ	= $(WIN32_OBJ:.\=.\mini\)
 MINI_OBJ	= $(MINICORE_OBJ) $(MINIWIN32_OBJ)
-PERL95_OBJ	= $(PERL95_SRC:.c=.obj)
 DLL_OBJ		= $(DLL_SRC:.c=.obj)
 X2P_OBJ		= $(X2P_SRC:.c=.obj)
 
@@ -629,7 +614,6 @@ PERLEXE_OBJ	= perlmain$(o)
 
 PERLDLL_OBJ	= $(PERLDLL_OBJ) $(WIN32_OBJ) $(DLL_OBJ)
 #PERLEXE_OBJ	= $(PERLEXE_OBJ) $(WIN32_OBJ) $(DLL_OBJ)
-#PERL95_OBJ	= $(PERL95_OBJ) DynaLoadmt$(o)
 
 !IF "$(USE_SETARGV)" != ""
 SETARGV_OBJ	= setargv$(o)
@@ -749,7 +733,7 @@ CFG_VARS	=					\
 # Top targets
 #
 
-all : .\config.h $(GLOBEXE) $(MINIMOD) $(CONFIGPM) $(PERLEXE) $(PERL95EXE) \
+all : .\config.h $(GLOBEXE) $(MINIMOD) $(CONFIGPM) $(PERLEXE) \
 	$(X2P) $(EXTENSION_DLL) $(EXTENSION_PM)
 
 $(DYNALOADER)$(o) : $(DYNALOADER).c $(CORE_H) $(EXTDIR)\DynaLoader\dlutils.c
@@ -823,7 +807,6 @@ $(MINI_OBJ)	: $(CORE_NOCFG_H)
 $(WIN32_OBJ)	: $(CORE_H)
 $(CORE_OBJ)	: $(CORE_H)
 $(DLL_OBJ)	: $(CORE_H)
-$(PERL95_OBJ)	: $(CORE_H)
 $(X2P_OBJ)	: $(CORE_H)
 
 perldll.def : $(MINIPERL) $(CONFIGPM) ..\global.sym ..\pp.sym ..\makedef.pl
@@ -875,33 +858,6 @@ $(PERLEXE): $(PERLDLL) $(CONFIGPM) $(PERLEXE_OBJ) $(PERLEXE_RES)
 	copy splittree.pl .. 
 	$(MINIPERL) -I..\lib ..\splittree.pl "../LIB" $(AUTODIR)
 
-!IF "$(BUILD_FOR_WIN95)" == "define"
-
-perl95.c : runperl.c 
-	copy runperl.c perl95.c
-
-perl95$(o) : perl95.c
-	$(CC) $(CFLAGS_O) -MT -UPERLDLL -DWIN95FIX -c perl95.c
-
-win32sckmt$(o) : win32sck.c
-	$(CC) $(CFLAGS_O) -MT -UPERLDLL -DWIN95FIX -c \
-	    $(OBJOUT_FLAG)win32sckmt$(o) win32sck.c
-
-win32mt$(o) : win32.c
-	$(CC) $(CFLAGS_O) -MT -UPERLDLL -DWIN95FIX -c \
-	    $(OBJOUT_FLAG)win32mt$(o) win32.c
-
-DynaLoadmt$(o) : $(DYNALOADER).c
-	$(CC) $(CFLAGS_O) -MT -UPERLDLL -DWIN95FIX -c \
-	    $(OBJOUT_FLAG)DynaLoadmt$(o) $(DYNALOADER).c
-
-$(PERL95EXE): $(PERLDLL) $(CONFIGPM) $(PERL95_OBJ)
-	$(LINK32) -subsystem:console -nodefaultlib -out:$@ $(LINK_FLAGS) \
-	    $(LIBBASEFILES) $(PERL95_OBJ) $(SETARGV_OBJ) $(PERLIMPLIB) \
-	    libcmt.lib
-
-!ENDIF
-
 $(DYNALOADER).c: $(MINIPERL) $(EXTDIR)\DynaLoader\dl_win32.xs $(CONFIGPM)
 	if not exist $(AUTODIR) mkdir $(AUTODIR)
 	cd $(EXTDIR)\$(*B)
@@ -1028,7 +984,7 @@ utils: $(PERLEXE) $(X2P)
 	$(PERLEXE) $(PL2BAT) $(UTILS)
 
 distclean: clean
-	-del /f $(MINIPERL) $(PERLEXE) $(PERL95EXE) $(PERLDLL) $(GLOBEXE) \
+	-del /f $(MINIPERL) $(PERLEXE) $(PERLDLL) $(GLOBEXE) \
 		$(PERLIMPLIB) ..\miniperl.lib $(MINIMOD)
 	-del /f *.def *.map
 	-del /f $(EXTENSION_DLL) $(EXTENSION_PM)
@@ -1059,7 +1015,6 @@ distclean: clean
 	cd ..\win32
 	-del /f ..\config.sh ..\splittree.pl perlmain.c dlutils.c config.h.new
 	-del /f $(CONFIGPM)
-	-del /f perl95.c
 	-del /f bin\*.bat
 	cd $(EXTDIR)
 	-del /s *.lib *.def *.map *.pdb *.bs Makefile *$(o) pm_to_blib
@@ -1071,9 +1026,6 @@ install : all installbare installhtml
 
 installbare : utils
 	$(PERLEXE) ..\installperl
-!IF "$(BUILD_FOR_WIN95)" == "define"
-	$(XCOPY) $(PERL95EXE) $(INST_BIN)\*.*
-!ENDIF
 	if exist $(WPERLEXE) $(XCOPY) $(WPERLEXE) $(INST_BIN)\*.*
 	$(XCOPY) $(GLOBEXE) $(INST_BIN)\*.*
 	$(XCOPY) bin\*.bat $(INST_SCRIPT)\*.*
diff --git a/win32/makefile.mk b/win32/makefile.mk
index 5736366fee..6d13e10a4c 100644
--- a/win32/makefile.mk
+++ b/win32/makefile.mk
@@ -600,9 +600,6 @@ PERLIMPLIB	= ..\libperl$(a)
 
 CFGSH_TMPL	= config.vc
 CFGH_TMPL	= config_H.vc
-.IF "$(USE_PERLCRT)" != "define"
-PERL95EXE	= ..\perl95.exe
-.ENDIF
 
 .ENDIF
 
@@ -671,15 +668,6 @@ WIN32_SRC	+= .\win32thread.c
 WIN32_SRC	+= .\$(CRYPT_SRC)
 .ENDIF
 
-PERL95_SRC	=		\
-		perl95.c	\
-		win32mt.c	\
-		win32sckmt.c
-
-.IF "$(CRYPT_SRC)" != ""
-PERL95_SRC	+= .\$(CRYPT_SRC)
-.ENDIF
-
 DLL_SRC		= $(DYNALOADER).c
 
 X2P_SRC		=		\
@@ -740,7 +728,6 @@ WIN32_OBJ	= $(WIN32_SRC:db:+$(o))
 MINICORE_OBJ	= $(MINIDIR)\{$(MICROCORE_OBJ:f) miniperlmain$(o) perlio$(o)}
 MINIWIN32_OBJ	= $(MINIDIR)\{$(WIN32_OBJ:f)}
 MINI_OBJ	= $(MINICORE_OBJ) $(MINIWIN32_OBJ)
-PERL95_OBJ	= $(PERL95_SRC:db:+$(o))
 DLL_OBJ		= $(DLL_SRC:db:+$(o))
 X2P_OBJ		= $(X2P_SRC:db:+$(o))
 
@@ -887,7 +874,7 @@ RIGHTMAKE	= __not_needed
 #
 
 all : .\config.h $(GLOBEXE) $(MINIPERL) $(MK2)		\
-	$(RIGHTMAKE) $(MINIMOD) $(CONFIGPM) $(PERLEXE) $(PERL95EXE)	\
+	$(RIGHTMAKE) $(MINIMOD) $(CONFIGPM) $(PERLEXE)	\
 	$(X2P) $(EXTENSION_DLL) $(EXTENSION_PM)
 
 $(DYNALOADER)$(o) : $(DYNALOADER).c $(CORE_H) $(EXTDIR)\DynaLoader\dlutils.c
@@ -1026,7 +1013,6 @@ $(MINI_OBJ)	: $(CORE_NOCFG_H)
 $(WIN32_OBJ)	: $(CORE_H)
 $(CORE_OBJ)	: $(CORE_H)
 $(DLL_OBJ)	: $(CORE_H)
-$(PERL95_OBJ)	: $(CORE_H)
 $(X2P_OBJ)	: $(CORE_H)
 
 perldll.def : $(MINIPERL) $(CONFIGPM) ..\global.sym ..\pp.sym ..\makedef.pl
@@ -1114,37 +1100,6 @@ $(PERLEXE): $(PERLDLL) $(CONFIGPM) $(PERLEXE_OBJ) $(PERLEXE_RES)
 	copy splittree.pl .. 
 	$(MINIPERL) -I..\lib ..\splittree.pl "../LIB" $(AUTODIR)
 
-.IF "$(CCTYPE)" != "BORLAND"
-.IF "$(CCTYPE)" != "GCC"
-.IF "$(USE_PERLCRT)" != "define"
-
-perl95.c : runperl.c 
-	copy runperl.c perl95.c
-
-perl95$(o) : perl95.c
-	$(CC) $(CFLAGS_O) -MT -UPERLDLL -DWIN95FIX -c perl95.c
-
-win32sckmt$(o) : win32sck.c
-	$(CC) $(CFLAGS_O) -MT -UPERLDLL -DWIN95FIX -c \
-	    $(OBJOUT_FLAG)win32sckmt$(o) win32sck.c
-
-win32mt$(o) : win32.c
-	$(CC) $(CFLAGS_O) -MT -UPERLDLL -DWIN95FIX -c \
-	    $(OBJOUT_FLAG)win32mt$(o) win32.c
-
-DynaLoadmt$(o) : $(DYNALOADER).c
-	$(CC) $(CFLAGS_O) -MT -UPERLDLL -DWIN95FIX -c \
-	    $(OBJOUT_FLAG)DynaLoadmt$(o) $(DYNALOADER).c
-
-$(PERL95EXE): $(PERLDLL) $(CONFIGPM) $(PERL95_OBJ)
-	$(LINK32) -subsystem:console -nodefaultlib -out:$@ $(BLINK_FLAGS) \
-	    $(LIBBASEFILES) $(PERL95_OBJ) $(SETARGV_OBJ) $(PERLIMPLIB) \
-	    libcmt.lib
-
-.ENDIF
-.ENDIF
-.ENDIF
-
 $(DYNALOADER).c: $(MINIPERL) $(EXTDIR)\DynaLoader\dl_win32.xs $(CONFIGPM)
 	if not exist $(AUTODIR) mkdir $(AUTODIR)
 	cd $(EXTDIR)\$(*B) && ..\$(MINIPERL) -I..\..\lib $(*B)_pm.PL
@@ -1249,7 +1204,7 @@ utils: $(PERLEXE) $(X2P)
 	$(PERLEXE) $(PL2BAT) $(UTILS)
 
 distclean: clean
-	-del /f $(MINIPERL) $(PERLEXE) $(PERL95EXE) $(PERLDLL) $(GLOBEXE) \
+	-del /f $(MINIPERL) $(PERLEXE) $(PERLDLL) $(GLOBEXE) \
 		$(PERLIMPLIB) ..\miniperl$(a) $(MINIMOD)
 	-del /f *.def *.map
 	-del /f $(EXTENSION_DLL) $(EXTENSION_PM)
@@ -1275,9 +1230,6 @@ distclean: clean
 	-cd ..\x2p && del /f find2perl s2p *.bat
 	-del /f ..\config.sh ..\splittree.pl perlmain.c dlutils.c config.h.new
 	-del /f $(CONFIGPM)
-.IF "$(PERL95EXE)" != ""
-	-del /f perl95.c
-.ENDIF
 	-del /f bin\*.bat
 	-cd $(EXTDIR) && del /s *$(a) *.def *.map *.pdb *.bs Makefile *$(o) \
 	    pm_to_blib
@@ -1288,9 +1240,6 @@ install : all installbare installhtml
 
 installbare : $(RIGHTMAKE) utils
 	$(PERLEXE) ..\installperl
-.IF "$(PERL95EXE)" != ""
-	$(XCOPY) $(PERL95EXE) $(INST_BIN)\*.*
-.ENDIF
 	if exist $(WPERLEXE) $(XCOPY) $(WPERLEXE) $(INST_BIN)\*.*
 	$(XCOPY) $(GLOBEXE) $(INST_BIN)\*.*
 	$(XCOPY) bin\*.bat $(INST_SCRIPT)\*.*
diff --git a/win32/win32.c b/win32/win32.c
index 22842ea5e8..49a8deee52 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -1747,53 +1747,70 @@ win32_crypt(const char *txt, const char *salt)
 #endif
 }
 
-#ifdef USE_FIXED_OSFHANDLE
+/* C doesn't like repeat struct definitions */
+
+#if defined(USE_FIXED_OSFHANDLE) || defined(PERL_MSVCRT_READFIX)
 
-EXTERN_C int __cdecl _alloc_osfhnd(void);
-EXTERN_C int __cdecl _set_osfhnd(int fh, long value);
-EXTERN_C void __cdecl _lock_fhandle(int);
-EXTERN_C void __cdecl _unlock_fhandle(int);
-EXTERN_C void __cdecl _unlock(int);
+#ifndef _CRTIMP
+#define _CRTIMP __declspec(dllimport)
+#endif
 
-#if	(_MSC_VER >= 1000)
-typedef struct	{
+/*
+ * Control structure for lowio file handles
+ */
+typedef struct {
     long osfhnd;    /* underlying OS file HANDLE */
     char osfile;    /* attributes of file (e.g., open in text mode?) */
     char pipech;    /* one char buffer for handles opened on pipes */
-#if defined (_MT) && !defined (DLL_FOR_WIN32S)
     int lockinitflag;
     CRITICAL_SECTION lock;
-#endif  /* defined (_MT) && !defined (DLL_FOR_WIN32S) */
-}	ioinfo;
+} ioinfo;
+
+
+/*
+ * Array of arrays of control structures for lowio files.
+ */
+EXTERN_C _CRTIMP ioinfo* __pioinfo[];
+
+/*
+ * Definition of IOINFO_L2E, the log base 2 of the number of elements in each
+ * array of ioinfo structs.
+ */
+#define IOINFO_L2E	    5
+
+/*
+ * Definition of IOINFO_ARRAY_ELTS, the number of elements in ioinfo array
+ */
+#define IOINFO_ARRAY_ELTS   (1 << IOINFO_L2E)
 
-EXTERN_C ioinfo * __pioinfo[];
+/*
+ * Access macros for getting at an ioinfo struct and its fields from a
+ * file handle
+ */
+#define _pioinfo(i) (__pioinfo[(i) >> IOINFO_L2E] + ((i) & (IOINFO_ARRAY_ELTS - 1)))
+#define _osfhnd(i)  (_pioinfo(i)->osfhnd)
+#define _osfile(i)  (_pioinfo(i)->osfile)
+#define _pipech(i)  (_pioinfo(i)->pipech)
 
-#define IOINFO_L2E			5
-#define IOINFO_ARRAY_ELTS	(1 << IOINFO_L2E)
-#define _pioinfo(i)	(__pioinfo[i >> IOINFO_L2E] + (i & (IOINFO_ARRAY_ELTS - 1)))
-#define _osfile(i)	(_pioinfo(i)->osfile)
+#endif
 
-#else	/* (_MSC_VER >= 1000) */
-extern char _osfile[];
-#endif	/* (_MSC_VER >= 1000) */
+#ifdef USE_FIXED_OSFHANDLE
 
 #define FOPEN			0x01	/* file handle open */
 #define FAPPEND			0x20	/* file handle opened O_APPEND */
 #define FDEV			0x40	/* file handle refers to device */
 #define FTEXT			0x80	/* file handle is in text mode */
 
-#define _STREAM_LOCKS   26		/* Table of stream locks */
-#define _LAST_STREAM_LOCK  (_STREAM_LOCKS+_NSTREAM_-1)	/* Last stream lock */
-#define _FH_LOCKS          (_LAST_STREAM_LOCK+1)	/* Table of fh locks */
-
 /***
 *int my_open_osfhandle(long osfhandle, int flags) - open C Runtime file handle
 *
 *Purpose:
 *       This function allocates a free C Runtime file handle and associates
 *       it with the Win32 HANDLE specified by the first parameter. This is a
-*		temperary fix for WIN95's brain damage GetFileType() error on socket
-*		we just bypass that call for socket
+*	temperary fix for WIN95's brain damage GetFileType() error on socket
+*	we just bypass that call for socket
+*
+*	This works with MSVC++ 4.0+ or GCC/Mingw32
 *
 *Entry:
 *       long osfhandle - Win32 HANDLE to associate with C Runtime file handle.
@@ -1807,6 +1824,30 @@ extern char _osfile[];
 *
 *******************************************************************************/
 
+/*
+ * we fake up some parts of the CRT that aren't exported by MSVCRT.dll
+ * this lets sockets work on Win9X with GCC and should fix the problems
+ * with perl95.exe
+ *	-- BKS, 1-23-2000
+*/
+
+/* since we are not doing a dup2(), this works fine */
+
+#define _set_osfhnd(fh, osfh) (void)(_osfhnd(fh) = osfh)
+
+/* create an ioinfo entry, kill its handle, and steal the entry */
+
+static int _alloc_osfhnd()
+{
+    HANDLE hF = CreateFile("NUL", 0, 0, NULL, OPEN_ALWAYS, 0, NULL);
+    int fh = _open_osfhandle(hF, 0);
+    CloseHandle(hF);
+    if (fh == -1)
+        return fh;
+    EnterCriticalSection(&(_pioinfo(fh)->lock));
+    return fh;
+}
+
 static int
 my_open_osfhandle(long osfhandle, int flags)
 {
@@ -1834,18 +1875,12 @@ my_open_osfhandle(long osfhandle, int flags)
 
     fileflags |= FOPEN;		/* mark as open */
 
-#if (_MSC_VER >= 1000)
     _osfile(fh) = fileflags;	/* set osfile entry */
-    _unlock_fhandle(fh);
-#else
-    _osfile[fh] = fileflags;	/* set osfile entry */
-    _unlock(fh+_FH_LOCKS);		/* unlock handle */
-#endif
+    LeaveCritiicalSection(&_pioinfo(fh)->lock);
 
     return fh;			/* return handle */
 }
 
-#define _open_osfhandle my_open_osfhandle
 #endif	/* USE_FIXED_OSFHANDLE */
 
 /* simulate flock by locking a range on the file */
@@ -2636,43 +2671,6 @@ win32_dup2(int fd1,int fd2)
 #define FTEXT		0x80	/* file handle is in text mode */
 #define MAX_DESCRIPTOR_COUNT	(64*32) /* this is the maximun that MSVCRT can handle */
 
-/*
- * Control structure for lowio file handles
- */
-typedef struct {
-    long osfhnd;    /* underlying OS file HANDLE */
-    char osfile;    /* attributes of file (e.g., open in text mode?) */
-    char pipech;    /* one char buffer for handles opened on pipes */
-    int lockinitflag;
-    CRITICAL_SECTION lock;
-} ioinfo;
-
-
-/*
- * Array of arrays of control structures for lowio files.
- */
-EXTERN_C _CRTIMP ioinfo* __pioinfo[];
-
-/*
- * Definition of IOINFO_L2E, the log base 2 of the number of elements in each
- * array of ioinfo structs.
- */
-#define IOINFO_L2E	    5
-
-/*
- * Definition of IOINFO_ARRAY_ELTS, the number of elements in ioinfo array
- */
-#define IOINFO_ARRAY_ELTS   (1 << IOINFO_L2E)
-
-/*
- * Access macros for getting at an ioinfo struct and its fields from a
- * file handle
- */
-#define _pioinfo(i) (__pioinfo[(i) >> IOINFO_L2E] + ((i) & (IOINFO_ARRAY_ELTS - 1)))
-#define _osfhnd(i)  (_pioinfo(i)->osfhnd)
-#define _osfile(i)  (_pioinfo(i)->osfile)
-#define _pipech(i)  (_pioinfo(i)->pipech)
-
 int __cdecl _fixed_read(int fh, void *buf, unsigned cnt)
 {
     int bytes_read;                 /* number of bytes read */
@@ -3405,6 +3403,10 @@ win32_free(void *block)
 int
 win32_open_osfhandle(long handle, int flags)
 {
+#ifdef USE_FIXED_OSFHANDLE
+    if (IsWin95())
+	return my_open_osfhandle(handle, flags);
+#endif
     return _open_osfhandle(handle, flags);
 }
 
diff --git a/win32/win32.h b/win32/win32.h
index d447f2bb07..066ed720d4 100644
--- a/win32/win32.h
+++ b/win32/win32.h
@@ -130,9 +130,11 @@ struct utsname {
  * facilities for accessing the same.  See note in util.c/my_setenv(). */
 /*#define USE_WIN32_RTL_ENV */
 
-/* Define USE_FIXED_OSFHANDLE to fix VC's _open_osfhandle() on W95.
- * Can only enable it if not using the DLL CRT (it doesn't expose internals) */
-#if defined(_MSC_VER) && !defined(_DLL) && defined(_M_IX86)
+/* Define USE_FIXED_OSFHANDLE to fix MSVCRT's _open_osfhandle() on W95.
+   It now uses some black magic to work seamlessly with the DLL CRT and
+   works with MSVC++ 4.0+ or GCC/Mingw32
+	-- BKS 1-24-2000 */
+#if (defined(_M_IX86) && _MSC_VER >= 1000) || defined(__MINGW32__)
 #define USE_FIXED_OSFHANDLE
 #endif