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annotate lib/unlocked-io.h @ 5848:a48fb0e98c8c

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*** empty log message ***
author Paul Eggert <eggert@cs.ucla.edu>
date Sat, 14 May 2005 06:03:57 +0000
parents 7c24a825b51d
children d39411e1c5e6
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1 /* Prefer faster, non-thread-safe stdio functions if available.
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2
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3 Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
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4
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5 This program is free software; you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 2, or (at your option)
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8 any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License along
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16 with this program; if not, write to the Free Software Foundation,
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17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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18
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19 /* Written by Jim Meyering. */
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20
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21 #ifndef UNLOCKED_IO_H
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22 #define UNLOCKED_IO_H 1
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23
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24 /* These are wrappers for functions/macros from the GNU C library, and
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25 from other C libraries supporting POSIX's optional thread-safe functions.
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26
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27 The standard I/O functions are thread-safe. These *_unlocked ones are
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28 more efficient but not thread-safe. That they're not thread-safe is
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29 fine since all of the applications in this package are single threaded.
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30
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31 Also, some code that is shared with the GNU C library may invoke
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32 the *_unlocked functions directly. On hosts that lack those
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33 functions, invoke the non-thread-safe versions instead. */
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34
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35 #include <stdio.h>
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36
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37 #if HAVE_DECL_CLEARERR_UNLOCKED
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38 # undef clearerr
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39 # define clearerr(x) clearerr_unlocked (x)
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40 #else
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41 # define clearerr_unlocked(x) clearerr (x)
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42 #endif
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43
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44 #if HAVE_DECL_FEOF_UNLOCKED
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45 # undef feof
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46 # define feof(x) feof_unlocked (x)
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47 #else
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48 # define feof_unlocked(x) feof (x)
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49 #endif
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50
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51 #if HAVE_DECL_FERROR_UNLOCKED
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52 # undef ferror
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53 # define ferror(x) ferror_unlocked (x)
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54 #else
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55 # define ferror_unlocked(x) ferror (x)
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56 #endif
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57
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58 #if HAVE_DECL_FFLUSH_UNLOCKED
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59 # undef fflush
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60 # define fflush(x) fflush_unlocked (x)
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61 #else
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62 # define fflush_unlocked(x) fflush (x)
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63 #endif
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64
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65 #if HAVE_DECL_FGETS_UNLOCKED
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66 # undef fgets
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67 # define fgets(x,y,z) fgets_unlocked (x,y,z)
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68 #else
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69 # define fgets_unlocked(x,y,z) fgets (x,y,z)
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70 #endif
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71
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72 #if HAVE_DECL_FPUTC_UNLOCKED
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73 # undef fputc
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74 # define fputc(x,y) fputc_unlocked (x,y)
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75 #else
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76 # define fputc_unlocked(x,y) fputc (x,y)
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77 #endif
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78
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79 #if HAVE_DECL_FPUTS_UNLOCKED
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80 # undef fputs
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81 # define fputs(x,y) fputs_unlocked (x,y)
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82 #else
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83 # define fputs_unlocked(x,y) fputs (x,y)
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84 #endif
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85
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86 #if HAVE_DECL_FREAD_UNLOCKED
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87 # undef fread
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88 # define fread(w,x,y,z) fread_unlocked (w,x,y,z)
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89 #else
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90 # define fread_unlocked(w,x,y,z) fread (w,x,y,z)
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91 #endif
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92
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93 #if HAVE_DECL_FWRITE_UNLOCKED
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94 # undef fwrite
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95 # define fwrite(w,x,y,z) fwrite_unlocked (w,x,y,z)
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96 #else
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97 # define fwrite_unlocked(w,x,y,z) fwrite (w,x,y,z)
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98 #endif
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99
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100 #if HAVE_DECL_GETC_UNLOCKED
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101 # undef getc
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102 # define getc(x) getc_unlocked (x)
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103 #else
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104 # define getc_unlocked(x) getc (x)
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105 #endif
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106
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107 #if HAVE_DECL_GETCHAR_UNLOCKED
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108 # undef getchar
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109 # define getchar() getchar_unlocked ()
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110 #else
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111 # define getchar_unlocked() getchar ()
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112 #endif
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113
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114 #if HAVE_DECL_PUTC_UNLOCKED
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115 # undef putc
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116 # define putc(x,y) putc_unlocked (x,y)
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117 #else
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118 # define putc_unlocked(x,y) putc (x,y)
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119 #endif
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120
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121 #if HAVE_DECL_PUTCHAR_UNLOCKED
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122 # undef putchar
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123 # define putchar(x) putchar_unlocked (x)
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124 #else
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125 # define putchar_unlocked(x) putchar (x)
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126 #endif
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127
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128 #undef flockfile
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129 #define flockfile(x) ((void) 0)
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130
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131 #undef ftrylockfile
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132 #define ftrylockfile(x) 0
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133
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134 #undef funlockfile
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135 #define funlockfile(x) ((void) 0)
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136
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137 #endif /* UNLOCKED_IO_H */