annotate lib/sys_select.in.h @ 15329:e121c7cef4a9

pselect: new module * lib/sys_select.in.h: Include <signal.h>, for 'sigset_t'. (pselect): New decls. * m4/sys_select_h.m4 (gl_HEADER_SYS_SELECT): Require AC_C_RESTRICT, since the standard pselect decl uses 'restrict'. (gl_SYS_SELECT_H_DEFAULTS): Add defaults for GNULIB_PSELECT, HAVE_PSELECT, REPLACE_PSELECT. * modules/sys_select (sys/select.h): Substitute GNULIB_PSELECT, HAVE_PSELECT, REPLACE_PSELECT. * lib/pselect.c, m4/pselect.m4, modules/pselect: New files.
author Paul Eggert <eggert@cs.ucla.edu>
date Thu, 30 Jun 2011 14:57:39 -0700
parents c7ae1577bd26
children f61aaaf49e43
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1 /* Substitute for <sys/select.h>.
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2 Copyright (C) 2007-2011 Free Software Foundation, Inc.
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3
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4 This program is free software; you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 2, or (at your option)
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7 any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program; if not, write to the Free Software Foundation,
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16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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17
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18 # if __GNUC__ >= 3
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19 @PRAGMA_SYSTEM_HEADER@
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20 # endif
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21 @PRAGMA_COLUMNS@
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22
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23 /* On OSF/1, <sys/types.h> and <sys/time.h> include <sys/select.h>.
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24 Simply delegate to the system's header in this case. */
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25 #if @HAVE_SYS_SELECT_H@ && defined __osf__ && (defined _SYS_TYPES_H_ && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H) && defined _OSF_SOURCE
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26
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27 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H
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28 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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29
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30 #elif @HAVE_SYS_SELECT_H@ && defined __osf__ && (defined _SYS_TIME_H_ && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H) && defined _OSF_SOURCE
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31
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32 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H
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33 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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34
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35 #else
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36
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37 #ifndef _@GUARD_PREFIX@_SYS_SELECT_H
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38
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39 #if @HAVE_SYS_SELECT_H@
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40
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41 /* On many platforms, <sys/select.h> assumes prior inclusion of
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42 <sys/types.h>. */
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43 # include <sys/types.h>
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44
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45 /* On OSF/1 4.0, <sys/select.h> provides only a forward declaration
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46 of 'struct timeval', and no definition of this type.
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47 Also, MacOS X, AIX, HP-UX, IRIX, Solaris, Interix declare select()
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48 in <sys/time.h>.
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49 But avoid namespace pollution on glibc systems. */
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50 # ifndef __GLIBC__
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51 # include <sys/time.h>
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52 # endif
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53
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54 /* On AIX 7 and Solaris 10, <sys/select.h> provides an FD_ZERO implementation
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55 that relies on memset(), but without including <string.h>.
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56 But in any case avoid namespace pollution on glibc systems. */
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57 # if (defined __OpenBSD__ || defined _AIX || defined __sun || defined __osf__ || defined __BEOS__) \
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58 && ! defined __GLIBC__
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59 # include <string.h>
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60 # endif
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61
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62 /* The include_next requires a split double-inclusion guard. */
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63 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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64
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65 #endif
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67 #ifndef _@GUARD_PREFIX@_SYS_SELECT_H
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68 #define _@GUARD_PREFIX@_SYS_SELECT_H
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69
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70 #if !@HAVE_SYS_SELECT_H@
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71 /* A platform that lacks <sys/select.h>. */
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72 /* Get the 'struct timeval' and 'fd_set' types and the FD_* macros
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73 on most platforms. */
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74 # include <sys/time.h>
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75 /* On HP-UX 11, <sys/time.h> provides an FD_ZERO implementation
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76 that relies on memset(), but without including <string.h>. */
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77 # if defined __hpux
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78 # include <string.h>
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79 # endif
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80 /* On native Windows platforms:
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81 Get the 'fd_set' type. Also, gnulib's <sys/socket.h> redefines select
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82 so as to hide the declaration from <winsock2.h>. */
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83 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
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84 # include <sys/socket.h>
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85 # endif
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86 #endif
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87
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88 /* Get definition of 'sigset_t'.
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89 But avoid namespace pollution on glibc systems. */
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90 #if !(defined __GLIBC__ && !defined __UCLIBC__)
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91 # include <signal.h>
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92 #endif
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93
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94 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
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95
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96 /* The definition of _GL_WARN_ON_USE is copied here. */
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97
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98
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99 #if @GNULIB_PSELECT@
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100 # if @REPLACE_PSELECT@
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101 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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102 # undef pselect
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103 # define pselect rpl_pselect
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104 # endif
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105 _GL_FUNCDECL_RPL (pselect, int,
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106 (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
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107 struct timespec const *restrict, const sigset_t *restrict));
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108 _GL_CXXALIAS_RPL (pselect, int,
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109 (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
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110 struct timespec const *restrict, const sigset_t *restrict));
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111 # else
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112 # if !@HAVE_PSELECT@
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113 _GL_FUNCDECL_SYS (pselect, int,
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114 (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
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115 struct timespec const *restrict, const sigset_t *restrict));
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116 # endif
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117 _GL_CXXALIAS_SYS (pselect, int,
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118 (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
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119 struct timespec const *restrict, const sigset_t *restrict));
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120 # endif
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121 _GL_CXXALIASWARN (pselect);
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122 #elif defined GNULIB_POSIXCHECK
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123 # undef pselect
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124 # if HAVE_RAW_DECL_PSELECT
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125 _GL_WARN_ON_USE (pselect, "pselect is not portable - "
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126 "use gnulib module pselect for portability");
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127 # endif
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128 #endif
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129
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130 #if @GNULIB_SELECT@
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131 # if @REPLACE_SELECT@
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132 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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133 # undef select
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134 # define select rpl_select
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135 # endif
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136 _GL_FUNCDECL_RPL (select, int,
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137 (int, fd_set *, fd_set *, fd_set *, struct timeval *));
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138 _GL_CXXALIAS_RPL (select, int,
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139 (int, fd_set *, fd_set *, fd_set *, struct timeval *));
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140 # else
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141 _GL_CXXALIAS_SYS (select, int,
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142 (int, fd_set *, fd_set *, fd_set *, struct timeval *));
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143 # endif
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144 _GL_CXXALIASWARN (select);
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145 #elif @HAVE_WINSOCK2_H@
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146 # undef select
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147 # define select select_used_without_requesting_gnulib_module_select
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148 #elif defined GNULIB_POSIXCHECK
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149 # undef select
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150 # if HAVE_RAW_DECL_SELECT
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151 _GL_WARN_ON_USE (select, "select is not always POSIX compliant - "
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152 "use gnulib module select for portability");
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9a7657d2031f Add a link warning when the 'select' module is not used.
Bruno Haible <bruno@clisp.org>
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153 # endif
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154 #endif
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Paolo Bonzini <bonzini@gnu.org>
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155
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parents:
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156
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Bruno Haible <bruno@clisp.org>
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157 #endif /* _@GUARD_PREFIX@_SYS_SELECT_H */
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Bruno Haible <bruno@clisp.org>
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158 #endif /* _@GUARD_PREFIX@_SYS_SELECT_H */
10882
3c51cf16c4fa Fix compilation error on OSF/1 4.0.
Bruno Haible <bruno@clisp.org>
parents: 10655
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159 #endif /* OSF/1 */