Added to the repository

1 files changed, 137 insertions, 0 deletions

diff --git a/mailbox/unlocked-io.h b/mailbox/unlocked-io.h
new file mode 100644
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+/* Prefer faster, non-thread-safe stdio functions if available.
+
+   Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+
+   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 General Public License for more details.
+
+   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.  */
+
+#ifndef UNLOCKED_IO_H
+#define UNLOCKED_IO_H 1
+
+/* 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.
+
+   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 /* UNLOCKED_IO_H */