annotate lib/signal.in.h @ 15369:ff0056fd6295

pthread_sigmask: Ensure declaration in <signal.h> also on Solaris 2.6.
author Bruno Haible <bruno@clisp.org>
date Fri, 08 Jul 2011 03:38:33 +0200
parents 6f48a9a9a38e
children 54bbcd9bb255
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1 /* A GNU-like <signal.h>.
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2
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3 Copyright (C) 2006-2011 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 #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 #if defined __need_sig_atomic_t || defined __need_sigset_t || defined _GL_ALREADY_INCLUDING_SIGNAL_H || (defined _SIGNAL_H && !defined __SIZEOF_PTHREAD_MUTEX_T)
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24 /* Special invocation convention:
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25 - Inside glibc header files.
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26 - On glibc systems we have a sequence of nested includes
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27 <signal.h> -> <ucontext.h> -> <signal.h>.
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28 In this situation, the functions are not yet declared, therefore we cannot
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29 provide the C++ aliases.
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30 - On glibc systems with GCC 4.3 we have a sequence of nested includes
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31 <csignal> -> </usr/include/signal.h> -> <sys/ucontext.h> -> <signal.h>.
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32 In this situation, some of the functions are not yet declared, therefore
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33 we cannot provide the C++ aliases. */
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34
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35 # @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
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36
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37 #else
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38 /* Normal invocation convention. */
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39
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40 #ifndef _@GUARD_PREFIX@_SIGNAL_H
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41
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42 #define _GL_ALREADY_INCLUDING_SIGNAL_H
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43
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44 /* Define pid_t, uid_t.
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45 Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.
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46 On Solaris 10, <signal.h> includes <sys/types.h>, which eventually includes
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47 us; so include <sys/types.h> now, before the second inclusion guard. */
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48 #include <sys/types.h>
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49
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50 /* The include_next requires a split double-inclusion guard. */
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51 #@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
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52
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53 #undef _GL_ALREADY_INCLUDING_SIGNAL_H
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54
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55 #ifndef _@GUARD_PREFIX@_SIGNAL_H
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56 #define _@GUARD_PREFIX@_SIGNAL_H
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57
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58 /* MacOS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6 declare
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59 pthread_sigmask in <pthread.h>, not in <signal.h>.
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60 But avoid namespace pollution on glibc systems.*/
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61 #if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \
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62 && ((defined __APPLE__ && defined __MACH__) || defined __FreeBSD__ || defined __OpenBSD__ || defined __osf__ || defined __sun) \
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63 && ! defined __GLIBC__
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64 # include <pthread.h>
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65 #endif
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66
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67 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
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68
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69 /* The definition of _GL_ARG_NONNULL is copied here. */
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70
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71 /* The definition of _GL_WARN_ON_USE is copied here. */
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72
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73 /* On AIX, sig_atomic_t already includes volatile. C99 requires that
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74 'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
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75 Hence, redefine this to a non-volatile type as needed. */
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76 #if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
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77 # if !GNULIB_defined_sig_atomic_t
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78 typedef int rpl_sig_atomic_t;
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79 # undef sig_atomic_t
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80 # define sig_atomic_t rpl_sig_atomic_t
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81 # define GNULIB_defined_sig_atomic_t 1
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82 # endif
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83 #endif
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84
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85 /* A set or mask of signals. */
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86 #if !@HAVE_SIGSET_T@
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87 # if !GNULIB_defined_sigset_t
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88 typedef unsigned int sigset_t;
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89 # define GNULIB_defined_sigset_t 1
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90 # endif
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91 #endif
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92
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93 /* Define sighandler_t, the type of signal handlers. A GNU extension. */
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94 #if !@HAVE_SIGHANDLER_T@
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95 # ifdef __cplusplus
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96 extern "C" {
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97 # endif
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98 # if !GNULIB_defined_sighandler_t
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99 typedef void (*sighandler_t) (int);
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100 # define GNULIB_defined_sighandler_t 1
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101 # endif
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102 # ifdef __cplusplus
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103 }
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104 # endif
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105 #endif
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106
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107
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108 #if @GNULIB_SIGNAL_H_SIGPIPE@
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109 # ifndef SIGPIPE
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110 /* Define SIGPIPE to a value that does not overlap with other signals. */
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111 # define SIGPIPE 13
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112 # define GNULIB_defined_SIGPIPE 1
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113 /* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
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114 'write', 'stdio'. */
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115 # endif
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116 #endif
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117
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118
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119 /* Maximum signal number + 1. */
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120 #ifndef NSIG
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121 # if defined __TANDEM
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122 # define NSIG 32
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123 # endif
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124 #endif
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125
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126
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127 #if @GNULIB_PTHREAD_SIGMASK@
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128 # if !@HAVE_PTHREAD_SIGMASK@
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129 _GL_FUNCDECL_SYS (pthread_sigmask, int,
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130 (int how, const sigset_t *new_mask, sigset_t *old_mask));
15343
107f8443e77a pthread_sigmask: new module
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131 # endif
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132 _GL_CXXALIAS_SYS (pthread_sigmask, int,
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133 (int how, const sigset_t *new_mask, sigset_t *old_mask));
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134 _GL_CXXALIASWARN (pthread_sigmask);
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135 #elif defined GNULIB_POSIXCHECK
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136 # undef pthread_sigmask
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137 # if HAVE_RAW_DECL_PTHREAD_SIGMASK
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138 _GL_WARN_ON_USE (pthread_sigmask, "pthread_sigmask is not portable - "
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139 "use gnulib module pthread_sigmask for portability");
107f8443e77a pthread_sigmask: new module
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140 # endif
107f8443e77a pthread_sigmask: new module
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141 #endif
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142
107f8443e77a pthread_sigmask: new module
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143
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144 #if @GNULIB_SIGPROCMASK@
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145 # if !@HAVE_POSIX_SIGNALBLOCKING@
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146
cda94d6d670f Rename signal_.h to signal.in.h.
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147 /* Maximum signal number + 1. */
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148 # ifndef NSIG
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149 # define NSIG 32
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150 # endif
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151
cda94d6d670f Rename signal_.h to signal.in.h.
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152 /* This code supports only 32 signals. */
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153 # if !GNULIB_defined_verify_NSIG_constraint
13787
f4b0b520e409 prefer (X ? 1 : -1) when converting from boolean (1,0) to int (1,-1)
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154 typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
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155 # define GNULIB_defined_verify_NSIG_constraint 1
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156 # endif
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157
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158 # endif
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159
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160 /* Test whether a given signal is contained in a signal set. */
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161 # if @HAVE_POSIX_SIGNALBLOCKING@
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162 /* This function is defined as a macro on MacOS X. */
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163 # if defined __cplusplus && defined GNULIB_NAMESPACE
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164 # undef sigismember
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165 # endif
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166 # else
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167 _GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
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168 _GL_ARG_NONNULL ((1)));
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169 # endif
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170 _GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
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171 _GL_CXXALIASWARN (sigismember);
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172
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173 /* Initialize a signal set to the empty set. */
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174 # if @HAVE_POSIX_SIGNALBLOCKING@
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175 /* This function is defined as a macro on MacOS X. */
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176 # if defined __cplusplus && defined GNULIB_NAMESPACE
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177 # undef sigemptyset
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178 # endif
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179 # else
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180 _GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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181 # endif
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182 _GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
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183 _GL_CXXALIASWARN (sigemptyset);
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184
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185 /* Add a signal to a signal set. */
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186 # if @HAVE_POSIX_SIGNALBLOCKING@
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187 /* This function is defined as a macro on MacOS X. */
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188 # if defined __cplusplus && defined GNULIB_NAMESPACE
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189 # undef sigaddset
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190 # endif
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191 # else
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192 _GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
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193 _GL_ARG_NONNULL ((1)));
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194 # endif
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195 _GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
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196 _GL_CXXALIASWARN (sigaddset);
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197
cda94d6d670f Rename signal_.h to signal.in.h.
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198 /* Remove a signal from a signal set. */
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199 # if @HAVE_POSIX_SIGNALBLOCKING@
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200 /* This function is defined as a macro on MacOS X. */
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201 # if defined __cplusplus && defined GNULIB_NAMESPACE
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202 # undef sigdelset
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203 # endif
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204 # else
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205 _GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
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206 _GL_ARG_NONNULL ((1)));
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207 # endif
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208 _GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
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209 _GL_CXXALIASWARN (sigdelset);
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210
cda94d6d670f Rename signal_.h to signal.in.h.
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211 /* Fill a signal set with all possible signals. */
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212 # if @HAVE_POSIX_SIGNALBLOCKING@
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213 /* This function is defined as a macro on MacOS X. */
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214 # if defined __cplusplus && defined GNULIB_NAMESPACE
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215 # undef sigfillset
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216 # endif
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diff changeset
217 # else
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218 _GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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219 # endif
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220 _GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
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221 _GL_CXXALIASWARN (sigfillset);
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222
cda94d6d670f Rename signal_.h to signal.in.h.
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223 /* Return the set of those blocked signals that are pending. */
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224 # if !@HAVE_POSIX_SIGNALBLOCKING@
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225 _GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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226 # endif
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227 _GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
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228 _GL_CXXALIASWARN (sigpending);
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229
cda94d6d670f Rename signal_.h to signal.in.h.
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230 /* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
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231 Then, if SET is not NULL, affect the current set of blocked signals by
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diff changeset
232 combining it with *SET as indicated in OPERATION.
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233 In this implementation, you are not allowed to change a signal handler
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234 while the signal is blocked. */
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235 # if !@HAVE_POSIX_SIGNALBLOCKING@
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diff changeset
236 # define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
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diff changeset
237 # define SIG_SETMASK 1 /* blocked_set = *set; */
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diff changeset
238 # define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
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239 _GL_FUNCDECL_SYS (sigprocmask, int,
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240 (int operation, const sigset_t *set, sigset_t *old_set));
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241 # endif
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242 _GL_CXXALIAS_SYS (sigprocmask, int,
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diff changeset
243 (int operation, const sigset_t *set, sigset_t *old_set));
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244 _GL_CXXALIASWARN (sigprocmask);
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245
10228
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246 /* Install the handler FUNC for signal SIG, and return the previous
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diff changeset
247 handler. */
12938
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248 # ifdef __cplusplus
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249 extern "C" {
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250 # endif
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251 # if !GNULIB_defined_function_taking_int_returning_void_t
12938
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252 typedef void (*_gl_function_taking_int_returning_void_t) (int);
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253 # define GNULIB_defined_function_taking_int_returning_void_t 1
da5595160b9f Allow multiple gnulib generated replacements to coexist.
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diff changeset
254 # endif
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255 # ifdef __cplusplus
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256 }
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257 # endif
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258 # if !@HAVE_POSIX_SIGNALBLOCKING@
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diff changeset
259 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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260 # define signal rpl_signal
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261 # endif
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262 _GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
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263 (int sig, _gl_function_taking_int_returning_void_t func));
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264 _GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
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265 (int sig, _gl_function_taking_int_returning_void_t func));
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266 # else
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267 _GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
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268 (int sig, _gl_function_taking_int_returning_void_t func));
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269 # endif
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270 _GL_CXXALIASWARN (signal);
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271
5a24031ebf7d Support signal handling with SIGPIPE on native Windows platforms.
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272 /* Raise signal SIG. */
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273 # if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
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274 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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275 # undef raise
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276 # define raise rpl_raise
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277 # endif
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278 _GL_FUNCDECL_RPL (raise, int, (int sig));
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279 _GL_CXXALIAS_RPL (raise, int, (int sig));
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280 # else
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281 _GL_CXXALIAS_SYS (raise, int, (int sig));
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282 # endif
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283 _GL_CXXALIASWARN (raise);
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284
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diff changeset
285 #elif defined GNULIB_POSIXCHECK
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286 # undef sigaddset
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287 # if HAVE_RAW_DECL_SIGADDSET
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diff changeset
288 _GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
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289 "use the gnulib module sigprocmask for portability");
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290 # endif
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291 # undef sigdelset
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diff changeset
292 # if HAVE_RAW_DECL_SIGDELSET
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diff changeset
293 _GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
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294 "use the gnulib module sigprocmask for portability");
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diff changeset
295 # endif
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296 # undef sigemptyset
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diff changeset
297 # if HAVE_RAW_DECL_SIGEMPTYSET
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diff changeset
298 _GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
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299 "use the gnulib module sigprocmask for portability");
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diff changeset
300 # endif
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301 # undef sigfillset
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diff changeset
302 # if HAVE_RAW_DECL_SIGFILLSET
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diff changeset
303 _GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
304 "use the gnulib module sigprocmask for portability");
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diff changeset
305 # endif
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diff changeset
306 # undef sigismember
12766
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diff changeset
307 # if HAVE_RAW_DECL_SIGISMEMBER
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diff changeset
308 _GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
309 "use the gnulib module sigprocmask for portability");
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diff changeset
310 # endif
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diff changeset
311 # undef sigpending
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diff changeset
312 # if HAVE_RAW_DECL_SIGPENDING
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diff changeset
313 _GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
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diff changeset
314 "use the gnulib module sigprocmask for portability");
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diff changeset
315 # endif
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diff changeset
316 # undef sigprocmask
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diff changeset
317 # if HAVE_RAW_DECL_SIGPROCMASK
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diff changeset
318 _GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
2c14f1e449e5 warn-on-use: use instead of link-warning
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diff changeset
319 "use the gnulib module sigprocmask for portability");
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diff changeset
320 # endif
12535
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diff changeset
321 #endif /* @GNULIB_SIGPROCMASK@ */
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29502a2dd08a New module sigaction, for mingw.
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diff changeset
322
10483
5a24031ebf7d Support signal handling with SIGPIPE on native Windows platforms.
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diff changeset
323
12535
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diff changeset
324 #if @GNULIB_SIGACTION@
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diff changeset
325 # if !@HAVE_SIGACTION@
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diff changeset
326
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diff changeset
327 # if !@HAVE_SIGINFO_T@
14274
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diff changeset
328
da5595160b9f Allow multiple gnulib generated replacements to coexist.
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diff changeset
329 # if !GNULIB_defined_siginfo_types
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330
10229
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diff changeset
331 /* Present to allow compilation, but unsupported by gnulib. */
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diff changeset
332 union sigval
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diff changeset
333 {
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diff changeset
334 int sival_int;
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diff changeset
335 void *sival_ptr;
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336 };
29502a2dd08a New module sigaction, for mingw.
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diff changeset
337
29502a2dd08a New module sigaction, for mingw.
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diff changeset
338 /* Present to allow compilation, but unsupported by gnulib. */
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diff changeset
339 struct siginfo_t
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diff changeset
340 {
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diff changeset
341 int si_signo;
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diff changeset
342 int si_code;
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diff changeset
343 int si_errno;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
344 pid_t si_pid;
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diff changeset
345 uid_t si_uid;
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diff changeset
346 void *si_addr;
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diff changeset
347 int si_status;
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diff changeset
348 long si_band;
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diff changeset
349 union sigval si_value;
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diff changeset
350 };
29502a2dd08a New module sigaction, for mingw.
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diff changeset
351 typedef struct siginfo_t siginfo_t;
14274
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diff changeset
352
da5595160b9f Allow multiple gnulib generated replacements to coexist.
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diff changeset
353 # define GNULIB_defined_siginfo_types 1
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354 # endif
da5595160b9f Allow multiple gnulib generated replacements to coexist.
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diff changeset
355
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diff changeset
356 # endif /* !@HAVE_SIGINFO_T@ */
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diff changeset
357
10243
f3834f370cbd Comment fixes.
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diff changeset
358 /* We assume that platforms which lack the sigaction() function also lack
f3834f370cbd Comment fixes.
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diff changeset
359 the 'struct sigaction' type, and vice versa. */
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diff changeset
360
14274
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diff changeset
361 # if !GNULIB_defined_struct_sigaction
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diff changeset
362
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diff changeset
363 struct sigaction
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diff changeset
364 {
29502a2dd08a New module sigaction, for mingw.
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diff changeset
365 union
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diff changeset
366 {
29502a2dd08a New module sigaction, for mingw.
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diff changeset
367 void (*_sa_handler) (int);
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diff changeset
368 /* Present to allow compilation, but unsupported by gnulib. POSIX
29502a2dd08a New module sigaction, for mingw.
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diff changeset
369 says that implementations may, but not must, make sa_sigaction
29502a2dd08a New module sigaction, for mingw.
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diff changeset
370 overlap with sa_handler, but we know of no implementation where
29502a2dd08a New module sigaction, for mingw.
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diff changeset
371 they do not overlap. */
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diff changeset
372 void (*_sa_sigaction) (int, siginfo_t *, void *);
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diff changeset
373 } _sa_func;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
374 sigset_t sa_mask;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
375 /* Not all POSIX flags are supported. */
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diff changeset
376 int sa_flags;
29502a2dd08a New module sigaction, for mingw.
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diff changeset
377 };
14274
da5595160b9f Allow multiple gnulib generated replacements to coexist.
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diff changeset
378 # define sa_handler _sa_func._sa_handler
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diff changeset
379 # define sa_sigaction _sa_func._sa_sigaction
10229
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diff changeset
380 /* Unsupported flags are not present. */
14274
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diff changeset
381 # define SA_RESETHAND 1
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diff changeset
382 # define SA_NODEFER 2
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diff changeset
383 # define SA_RESTART 4
da5595160b9f Allow multiple gnulib generated replacements to coexist.
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diff changeset
384
da5595160b9f Allow multiple gnulib generated replacements to coexist.
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diff changeset
385 # define GNULIB_defined_struct_sigaction 1
da5595160b9f Allow multiple gnulib generated replacements to coexist.
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diff changeset
386 # endif
10229
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diff changeset
387
12938
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diff changeset
388 _GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
baf17c6b8bd7 signal: Avoid #define replacements in C++ mode.
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diff changeset
389 struct sigaction *restrict));
10229
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diff changeset
390
12535
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diff changeset
391 # elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
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diff changeset
392
8c827f8e5f04 signal, spawn: use link warnings
Eric Blake <ebb9@byu.net>
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diff changeset
393 # define sa_sigaction sa_handler
10321
a6493a165dd2 c-stack: fix regression on Irix 5.3 from 2008-06-21
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diff changeset
394
12535
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diff changeset
395 # endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
12938
baf17c6b8bd7 signal: Avoid #define replacements in C++ mode.
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diff changeset
396
baf17c6b8bd7 signal: Avoid #define replacements in C++ mode.
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diff changeset
397 _GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
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398 struct sigaction *restrict));
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399 _GL_CXXALIASWARN (sigaction);
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400
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401 #elif defined GNULIB_POSIXCHECK
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402 # undef sigaction
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403 # if HAVE_RAW_DECL_SIGACTION
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404 _GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
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405 "use the gnulib module sigaction for portability");
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406 # endif
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407 #endif
9259
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408
10706
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409 /* Some systems don't have SA_NODEFER. */
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410 #ifndef SA_NODEFER
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411 # define SA_NODEFER 0
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412 #endif
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413
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414
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415 #endif /* _@GUARD_PREFIX@_SIGNAL_H */
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416 #endif /* _@GUARD_PREFIX@_SIGNAL_H */
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417 #endif