1 files changed, 54 insertions, 12 deletions

diff --git a/lib/unlocked-io.h b/lib/unlocked-io.h
index a7240fb9..36a7a488 100644
--- a/lib/unlocked-io.h
+++ b/lib/unlocked-io.h
@@ -1,21 +1,20 @@
 /* Prefer faster, non-thread-safe stdio functions if available.
 
-   Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify it
-   under the terms of the GNU Library General Public License as published
-   by the Free Software Foundation; either version 2, or (at your option)
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
    any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Library General Public License for more details.
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
 
-   You should have received a copy of the GNU Library General Public
-   License along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-   USA.  */
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
 /* Written by Jim Meyering.  */
 
@@ -28,63 +27,106 @@
 
 # if USE_UNLOCKED_IO
 
-/* These are wrappers for functions/macros from GNU libc.
+/* These are wrappers for functions/macros from the GNU C library, and
+   from other C libraries supporting POSIX's optional thread-safe functions.
+
    The standard I/O functions are thread-safe.  These *_unlocked ones are
    more efficient but not thread-safe.  That they're not thread-safe is
-   fine since all of the applications in this package are single threaded.  */
+   fine since all of the applications in this package are single threaded.
+
+   Also, some code that is shared with the GNU C library may invoke
+   the *_unlocked functions directly.  On hosts that lack those
+   functions, invoke the non-thread-safe versions instead.  */
+
+#  include <stdio.h>
 
 #  if HAVE_DECL_CLEARERR_UNLOCKED
 #   undef clearerr
 #   define clearerr(x) clearerr_unlocked (x)
+#  else
+#   define clearerr_unlocked(x) clearerr (x)
 #  endif
 #  if HAVE_DECL_FEOF_UNLOCKED
 #   undef feof
 #   define feof(x) feof_unlocked (x)
+#  else
+#   define feof_unlocked(x) feof (x)
 #  endif
 #  if HAVE_DECL_FERROR_UNLOCKED
 #   undef ferror
 #   define ferror(x) ferror_unlocked (x)
+#  else
+#   define ferror_unlocked(x) ferror (x)
 #  endif
 #  if HAVE_DECL_FFLUSH_UNLOCKED
 #   undef fflush
 #   define fflush(x) fflush_unlocked (x)
+#  else
+#   define fflush_unlocked(x) fflush (x)
 #  endif
 #  if HAVE_DECL_FGETS_UNLOCKED
 #   undef fgets
 #   define fgets(x,y,z) fgets_unlocked (x,y,z)
+#  else
+#   define fgets_unlocked(x,y,z) fgets (x,y,z)
 #  endif
 #  if HAVE_DECL_FPUTC_UNLOCKED
 #   undef fputc
 #   define fputc(x,y) fputc_unlocked (x,y)
+#  else
+#   define fputc_unlocked(x,y) fputc (x,y)
 #  endif
 #  if HAVE_DECL_FPUTS_UNLOCKED
 #   undef fputs
 #   define fputs(x,y) fputs_unlocked (x,y)
+#  else
+#   define fputs_unlocked(x,y) fputs (x,y)
 #  endif
 #  if HAVE_DECL_FREAD_UNLOCKED
 #   undef fread
 #   define fread(w,x,y,z) fread_unlocked (w,x,y,z)
+#  else
+#   define fread_unlocked(w,x,y,z) fread (w,x,y,z)
 #  endif
 #  if HAVE_DECL_FWRITE_UNLOCKED
 #   undef fwrite
 #   define fwrite(w,x,y,z) fwrite_unlocked (w,x,y,z)
+#  else
+#   define fwrite_unlocked(w,x,y,z) fwrite (w,x,y,z)
 #  endif
 #  if HAVE_DECL_GETC_UNLOCKED
 #   undef getc
 #   define getc(x) getc_unlocked (x)
+#  else
+#   define getc_unlocked(x) getc (x)
 #  endif
 #  if HAVE_DECL_GETCHAR_UNLOCKED
 #   undef getchar
 #   define getchar() getchar_unlocked ()
+#  else
+#   define getchar_unlocked() getchar ()
 #  endif
 #  if HAVE_DECL_PUTC_UNLOCKED
 #   undef putc
 #   define putc(x,y) putc_unlocked (x,y)
+#  else
+#   define putc_unlocked(x,y) putc (x,y)
 #  endif
 #  if HAVE_DECL_PUTCHAR_UNLOCKED
 #   undef putchar
 #   define putchar(x) putchar_unlocked (x)
+#  else
+#   define putchar_unlocked(x) putchar (x)
 #  endif
 
+#  undef flockfile
+#  define flockfile(x) ((void) 0)
+
+#  undef ftrylockfile
+#  define ftrylockfile(x) 0
+
+#  undef funlockfile
+#  define funlockfile(x) ((void) 0)
+
 # endif /* USE_UNLOCKED_IO */
 #endif /* UNLOCKED_IO_H */