unlocked-io.h   [plain text]

/* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 */