root/lib/unlocked-io.h

INCLUDED FROM

     1 /* Prefer faster, non-thread-safe stdio functions if available.
     2 
     3    Copyright (C) 2001-2004, 2009-2023 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 3 of the License, or
     8    (at your option) 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
    16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
    17 
    18 /* Written by Jim Meyering.  */
    19 
    20 #ifndef UNLOCKED_IO_H
    21 # define UNLOCKED_IO_H 1
    22 
    23 /* These are wrappers for functions/macros from the GNU C library, and
    24    from other C libraries supporting POSIX's optional thread-safe functions.
    25 
    26    The standard I/O functions are thread-safe.  These *_unlocked ones are
    27    more efficient but not thread-safe.  That they're not thread-safe is
    28    fine since all of the applications in this package are single threaded.
    29 
    30    Also, some code that is shared with the GNU C library may invoke
    31    the *_unlocked functions directly.  On hosts that lack those
    32    functions, invoke the non-thread-safe versions instead.  */
    33 
    34 # include <stdio.h>
    35 
    36 # if HAVE_DECL_CLEARERR_UNLOCKED || defined clearerr_unlocked
    37 #  undef clearerr
    38 #  define clearerr(x) clearerr_unlocked (x)
    39 # else
    40 #  define clearerr_unlocked(x) clearerr (x)
    41 # endif
    42 
    43 # if HAVE_DECL_FEOF_UNLOCKED || defined feof_unlocked
    44 #  undef feof
    45 #  define feof(x) feof_unlocked (x)
    46 # else
    47 #  define feof_unlocked(x) feof (x)
    48 # endif
    49 
    50 # if HAVE_DECL_FERROR_UNLOCKED || defined ferror_unlocked
    51 #  undef ferror
    52 #  define ferror(x) ferror_unlocked (x)
    53 # else
    54 #  define ferror_unlocked(x) ferror (x)
    55 # endif
    56 
    57 # if HAVE_DECL_FFLUSH_UNLOCKED || defined fflush_unlocked
    58 #  undef fflush
    59 #  define fflush(x) fflush_unlocked (x)
    60 # else
    61 #  define fflush_unlocked(x) fflush (x)
    62 # endif
    63 
    64 # if HAVE_DECL_FGETS_UNLOCKED || defined fgets_unlocked
    65 #  undef fgets
    66 #  define fgets(x,y,z) fgets_unlocked (x,y,z)
    67 # else
    68 #  define fgets_unlocked(x,y,z) fgets (x,y,z)
    69 # endif
    70 
    71 # if HAVE_DECL_FPUTC_UNLOCKED || defined fputc_unlocked
    72 #  undef fputc
    73 #  define fputc(x,y) fputc_unlocked (x,y)
    74 # else
    75 #  define fputc_unlocked(x,y) fputc (x,y)
    76 # endif
    77 
    78 # if HAVE_DECL_FPUTS_UNLOCKED || defined fputs_unlocked
    79 #  undef fputs
    80 #  define fputs(x,y) fputs_unlocked (x,y)
    81 # else
    82 #  define fputs_unlocked(x,y) fputs (x,y)
    83 # endif
    84 
    85 # if HAVE_DECL_FREAD_UNLOCKED || defined fread_unlocked
    86 #  undef fread
    87 #  define fread(w,x,y,z) fread_unlocked (w,x,y,z)
    88 # else
    89 #  define fread_unlocked(w,x,y,z) fread (w,x,y,z)
    90 # endif
    91 
    92 # if HAVE_DECL_FWRITE_UNLOCKED || defined fwrite_unlocked
    93 #  undef fwrite
    94 #  define fwrite(w,x,y,z) fwrite_unlocked (w,x,y,z)
    95 # else
    96 #  define fwrite_unlocked(w,x,y,z) fwrite (w,x,y,z)
    97 # endif
    98 
    99 # if HAVE_DECL_GETC_UNLOCKED || defined get_unlocked
   100 #  undef getc
   101 #  define getc(x) getc_unlocked (x)
   102 # else
   103 #  define getc_unlocked(x) getc (x)
   104 # endif
   105 
   106 # if HAVE_DECL_GETCHAR_UNLOCKED || defined getchar_unlocked
   107 #  undef getchar
   108 #  define getchar() getchar_unlocked ()
   109 # else
   110 #  define getchar_unlocked() getchar ()
   111 # endif
   112 
   113 # if HAVE_DECL_PUTC_UNLOCKED || defined putc_unlocked
   114 #  undef putc
   115 #  define putc(x,y) putc_unlocked (x,y)
   116 # else
   117 #  define putc_unlocked(x,y) putc (x,y)
   118 # endif
   119 
   120 # if HAVE_DECL_PUTCHAR_UNLOCKED || defined putchar_unlocked
   121 #  undef putchar
   122 #  define putchar(x) putchar_unlocked (x)
   123 # else
   124 #  define putchar_unlocked(x) putchar (x)
   125 # endif
   126 
   127 # undef flockfile
   128 # define flockfile(x) ((void) 0)
   129 
   130 # undef ftrylockfile
   131 # define ftrylockfile(x) 0
   132 
   133 # undef funlockfile
   134 # define funlockfile(x) ((void) 0)
   135 
   136 #endif /* UNLOCKED_IO_H */