lib/unlocked-io.h

   1 /* Prefer faster, non-thread-safe stdio functions if available.
   2
   3    Copyright (C) 2001, 2002 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify it
   6    under the terms of the GNU Library General Public License as published
   7    by 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 GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with this program; if not, write to the Free Software
  17    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  18    USA.  */
  19
  20 /* Written by Jim Meyering.  */
  21
  22 #ifndef UNLOCKED_IO_H
  23 # define UNLOCKED_IO_H 1
  24
  25 # ifndef USE_UNLOCKED_IO
  26 #  define USE_UNLOCKED_IO 1
  27 # endif
  28
  29 # if USE_UNLOCKED_IO
  30
  31 /* These are wrappers for functions/macros from GNU libc.
  32    The standard I/O functions are thread-safe.  These *_unlocked ones are
  33    more efficient but not thread-safe.  That they're not thread-safe is
  34    fine since all of the applications in this package are single threaded.  */
  35
  36 #  if HAVE_DECL_CLEARERR_UNLOCKED
  37 #   undef clearerr
  38 #   define clearerr(x) clearerr_unlocked (x)
  39 #  endif
  40 #  if HAVE_DECL_FEOF_UNLOCKED
  41 #   undef feof
  42 #   define feof(x) feof_unlocked (x)
  43 #  endif
  44 #  if HAVE_DECL_FERROR_UNLOCKED
  45 #   undef ferror
  46 #   define ferror(x) ferror_unlocked (x)
  47 #  endif
  48 #  if HAVE_DECL_FFLUSH_UNLOCKED
  49 #   undef fflush
  50 #   define fflush(x) fflush_unlocked (x)
  51 #  endif
  52 #  if HAVE_DECL_FGETS_UNLOCKED
  53 #   undef fgets
  54 #   define fgets(x,y,z) fgets_unlocked (x,y,z)
  55 #  endif
  56 #  if HAVE_DECL_FPUTC_UNLOCKED
  57 #   undef fputc
  58 #   define fputc(x,y) fputc_unlocked (x,y)
  59 #  endif
  60 #  if HAVE_DECL_FPUTS_UNLOCKED
  61 #   undef fputs
  62 #   define fputs(x,y) fputs_unlocked (x,y)
  63 #  endif
  64 #  if HAVE_DECL_FREAD_UNLOCKED
  65 #   undef fread
  66 #   define fread(w,x,y,z) fread_unlocked (w,x,y,z)
  67 #  endif
  68 #  if HAVE_DECL_FWRITE_UNLOCKED
  69 #   undef fwrite
  70 #   define fwrite(w,x,y,z) fwrite_unlocked (w,x,y,z)
  71 #  endif
  72 #  if HAVE_DECL_GETC_UNLOCKED
  73 #   undef getc
  74 #   define getc(x) getc_unlocked (x)
  75 #  endif
  76 #  if HAVE_DECL_GETCHAR_UNLOCKED
  77 #   undef getchar
  78 #   define getchar() getchar_unlocked ()
  79 #  endif
  80 #  if HAVE_DECL_PUTC_UNLOCKED
  81 #   undef putc
  82 #   define putc(x,y) putc_unlocked (x,y)
  83 #  endif
  84 #  if HAVE_DECL_PUTCHAR_UNLOCKED
  85 #   undef putchar
  86 #   define putchar(x) putchar_unlocked (x)
  87 #  endif
  88
  89 # endif /* USE_UNLOCKED_IO */
  90 #endif /* UNLOCKED_IO_H */