contrib/cvs-1.12/lib/unlocked-io.h

   1 /* Prefer faster, non-thread-safe stdio functions if available.
   2
   3    Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License along
  16    with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* Written by Jim Meyering.  */
  20
  21 #ifndef UNLOCKED_IO_H
  22 # define UNLOCKED_IO_H 1
  23
  24 /* These are wrappers for functions/macros from the GNU C library, and
  25    from other C libraries supporting POSIX's optional thread-safe functions.
  26
  27    The standard I/O functions are thread-safe.  These *_unlocked ones are
  28    more efficient but not thread-safe.  That they're not thread-safe is
  29    fine since all of the applications in this package are single threaded.
  30
  31    Also, some code that is shared with the GNU C library may invoke
  32    the *_unlocked functions directly.  On hosts that lack those
  33    functions, invoke the non-thread-safe versions instead.  */
  34
  35 # include <stdio.h>
  36
  37 # if HAVE_DECL_CLEARERR_UNLOCKED
  38 #  undef clearerr
  39 #  define clearerr(x) clearerr_unlocked (x)
  40 # else
  41 #  define clearerr_unlocked(x) clearerr (x)
  42 # endif
  43
  44 # if HAVE_DECL_FEOF_UNLOCKED
  45 #  undef feof
  46 #  define feof(x) feof_unlocked (x)
  47 # else
  48 #  define feof_unlocked(x) feof (x)
  49 # endif
  50
  51 # if HAVE_DECL_FERROR_UNLOCKED
  52 #  undef ferror
  53 #  define ferror(x) ferror_unlocked (x)
  54 # else
  55 #  define ferror_unlocked(x) ferror (x)
  56 # endif
  57
  58 # if HAVE_DECL_FFLUSH_UNLOCKED
  59 #  undef fflush
  60 #  define fflush(x) fflush_unlocked (x)
  61 # else
  62 #  define fflush_unlocked(x) fflush (x)
  63 # endif
  64
  65 # if HAVE_DECL_FGETS_UNLOCKED
  66 #  undef fgets
  67 #  define fgets(x,y,z) fgets_unlocked (x,y,z)
  68 # else
  69 #  define fgets_unlocked(x,y,z) fgets (x,y,z)
  70 # endif
  71
  72 # if HAVE_DECL_FPUTC_UNLOCKED
  73 #  undef fputc
  74 #  define fputc(x,y) fputc_unlocked (x,y)
  75 # else
  76 #  define fputc_unlocked(x,y) fputc (x,y)
  77 # endif
  78
  79 # if HAVE_DECL_FPUTS_UNLOCKED
  80 #  undef fputs
  81 #  define fputs(x,y) fputs_unlocked (x,y)
  82 # else
  83 #  define fputs_unlocked(x,y) fputs (x,y)
  84 # endif
  85
  86 # if HAVE_DECL_FREAD_UNLOCKED
  87 #  undef fread
  88 #  define fread(w,x,y,z) fread_unlocked (w,x,y,z)
  89 # else
  90 #  define fread_unlocked(w,x,y,z) fread (w,x,y,z)
  91 # endif
  92
  93 # if HAVE_DECL_FWRITE_UNLOCKED
  94 #  undef fwrite
  95 #  define fwrite(w,x,y,z) fwrite_unlocked (w,x,y,z)
  96 # else
  97 #  define fwrite_unlocked(w,x,y,z) fwrite (w,x,y,z)
  98 # endif
  99
 100 # if HAVE_DECL_GETC_UNLOCKED
 101 #  undef getc
 102 #  define getc(x) getc_unlocked (x)
 103 # else
 104 #  define getc_unlocked(x) getc (x)
 105 # endif
 106
 107 # if HAVE_DECL_GETCHAR_UNLOCKED
 108 #  undef getchar
 109 #  define getchar() getchar_unlocked ()
 110 # else
 111 #  define getchar_unlocked() getchar ()
 112 # endif
 113
 114 # if HAVE_DECL_PUTC_UNLOCKED
 115 #  undef putc
 116 #  define putc(x,y) putc_unlocked (x,y)
 117 # else
 118 #  define putc_unlocked(x,y) putc (x,y)
 119 # endif
 120
 121 # if HAVE_DECL_PUTCHAR_UNLOCKED
 122 #  undef putchar
 123 #  define putchar(x) putchar_unlocked (x)
 124 # else
 125 #  define putchar_unlocked(x) putchar (x)
 126 # endif
 127
 128 # undef flockfile
 129 # define flockfile(x) ((void) 0)
 130
 131 # undef ftrylockfile
 132 # define ftrylockfile(x) 0
 133
 134 # undef funlockfile
 135 # define funlockfile(x) ((void) 0)
 136
 137 #endif /* UNLOCKED_IO_H */