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annotate lib/unlocked-io.h @ 17476:6057744acd2c default tip master

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author Karl Berry <karl@freefriends.org>
date Fri, 16 Aug 2013 06:32:22 -0700
parents e542fd46ad6f
children
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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) 2001-2004, 2009-2013 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 3 of the License, or
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8 (at your option) 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
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 /* Written by Jim Meyering. */
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19
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20 #ifndef UNLOCKED_IO_H
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21 # define UNLOCKED_IO_H 1
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22
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23 /* These are wrappers for functions/macros from the GNU C library, and
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24 from other C libraries supporting POSIX's optional thread-safe functions.
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25
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26 The standard I/O functions are thread-safe. These *_unlocked ones are
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27 more efficient but not thread-safe. That they're not thread-safe is
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28 fine since all of the applications in this package are single threaded.
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29
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30 Also, some code that is shared with the GNU C library may invoke
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31 the *_unlocked functions directly. On hosts that lack those
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32 functions, invoke the non-thread-safe versions instead. */
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33
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34 # include <stdio.h>
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35
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36 # if HAVE_DECL_CLEARERR_UNLOCKED
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37 # undef clearerr
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38 # define clearerr(x) clearerr_unlocked (x)
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39 # else
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40 # define clearerr_unlocked(x) clearerr (x)
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41 # endif
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42
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43 # if HAVE_DECL_FEOF_UNLOCKED
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44 # undef feof
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45 # define feof(x) feof_unlocked (x)
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46 # else
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47 # define feof_unlocked(x) feof (x)
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48 # endif
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49
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50 # if HAVE_DECL_FERROR_UNLOCKED
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51 # undef ferror
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52 # define ferror(x) ferror_unlocked (x)
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53 # else
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54 # define ferror_unlocked(x) ferror (x)
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55 # endif
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56
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57 # if HAVE_DECL_FFLUSH_UNLOCKED
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58 # undef fflush
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59 # define fflush(x) fflush_unlocked (x)
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60 # else
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61 # define fflush_unlocked(x) fflush (x)
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62 # endif
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63
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64 # if HAVE_DECL_FGETS_UNLOCKED
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65 # undef fgets
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66 # define fgets(x,y,z) fgets_unlocked (x,y,z)
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67 # else
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68 # define fgets_unlocked(x,y,z) fgets (x,y,z)
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69 # endif
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70
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71 # if HAVE_DECL_FPUTC_UNLOCKED
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72 # undef fputc
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73 # define fputc(x,y) fputc_unlocked (x,y)
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74 # else
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75 # define fputc_unlocked(x,y) fputc (x,y)
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76 # endif
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77
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78 # if HAVE_DECL_FPUTS_UNLOCKED
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79 # undef fputs
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80 # define fputs(x,y) fputs_unlocked (x,y)
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81 # else
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82 # define fputs_unlocked(x,y) fputs (x,y)
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83 # endif
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84
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85 # if HAVE_DECL_FREAD_UNLOCKED
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86 # undef fread
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87 # define fread(w,x,y,z) fread_unlocked (w,x,y,z)
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88 # else
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89 # define fread_unlocked(w,x,y,z) fread (w,x,y,z)
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90 # endif
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91
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92 # if HAVE_DECL_FWRITE_UNLOCKED
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93 # undef fwrite
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94 # define fwrite(w,x,y,z) fwrite_unlocked (w,x,y,z)
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95 # else
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96 # define fwrite_unlocked(w,x,y,z) fwrite (w,x,y,z)
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97 # endif
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98
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99 # if HAVE_DECL_GETC_UNLOCKED
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100 # undef getc
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101 # define getc(x) getc_unlocked (x)
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102 # else
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103 # define getc_unlocked(x) getc (x)
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104 # endif
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105
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106 # if HAVE_DECL_GETCHAR_UNLOCKED
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107 # undef getchar
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108 # define getchar() getchar_unlocked ()
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109 # else
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110 # define getchar_unlocked() getchar ()
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111 # endif
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112
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113 # if HAVE_DECL_PUTC_UNLOCKED
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114 # undef putc
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115 # define putc(x,y) putc_unlocked (x,y)
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116 # else
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117 # define putc_unlocked(x,y) putc (x,y)
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118 # endif
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119
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120 # if HAVE_DECL_PUTCHAR_UNLOCKED
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121 # undef putchar
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122 # define putchar(x) putchar_unlocked (x)
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123 # else
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124 # define putchar_unlocked(x) putchar (x)
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125 # endif
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126
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127 # undef flockfile
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128 # define flockfile(x) ((void) 0)
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129
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130 # undef ftrylockfile
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131 # define ftrylockfile(x) 0
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132
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133 # undef funlockfile
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134 # define funlockfile(x) ((void) 0)
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135
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136 #endif /* UNLOCKED_IO_H */