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annotate liboctave/wrappers/signal-wrappers.c @ 23084:ef4d915df748

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maint: Merge stable to default.
author John W. Eaton <jwe@octave.org>
date Mon, 23 Jan 2017 14:27:48 -0500
parents 3a2b891d0b33 e9a0469dedd9
children 092078913d54
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1 /*
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2
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3 Copyright (C) 2016 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3 of the License, or
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10 (at your option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 // These functions may be provided by gnulib. We don't include gnulib
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24 // headers directly in Octave's C++ source files to avoid problems that
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25 // may be caused by the way that gnulib overrides standard library
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26 // functions.
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27
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28 #if defined (HAVE_CONFIG_H)
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29 # include "config.h"
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30 #endif
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31
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32 #include <sys/types.h>
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33 #include <signal.h>
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34 #include <stdlib.h>
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35 #include <string.h>
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36
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37 #if defined (__WIN32__) && ! defined (__CYGWIN__)
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38 # include <windows.h>
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39 #else
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40 # include <pthread.h>
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41 #endif
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42
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43 #include "signal-wrappers.h"
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44
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45 int
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46 octave_kill_wrapper (pid_t pid, int signum)
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47 {
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48 #if defined (HAVE_KILL)
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49 return kill (pid, signum);
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50 #else
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51 return -1;
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52 #endif
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53 }
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54
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55 char *
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56 octave_strsignal_wrapper (int signum)
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57 {
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58 return strsignal (signum);
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59 }
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60
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61 bool
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62 octave_have_kill (void)
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63 {
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64 #if defined (HAVE_KILL)
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65 return true;
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66 #else
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67 return false;
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68 #endif
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69 }
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70
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71 bool
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72 octave_get_sig_number (const char *signame, int *signum)
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73 {
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74 *signum = -1;
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75
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76 // FIXME: this should probably use a perfect hash function.
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77
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78 if (! strcmp (signame, "SIGINT"))
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79 {
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80 #if defined (SIGINT)
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81 *signum = SIGINT;
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82 return true;
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83 #endif
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84 }
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85 else if (! strcmp (signame, "SIGBREAK"))
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86 {
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87 #if defined (SIGBREAK)
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88 *signum = SIGBREAK;
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89 return true;
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90 #endif
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91 }
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92 else if (! strcmp (signame, "SIGABRT"))
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93 {
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94 #if defined (SIGABRT)
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95 *signum = SIGABRT;
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96 return true;
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97 #endif
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98 }
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99 else if (! strcmp (signame, "SIGALRM"))
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100 {
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101 #if defined (SIGALRM)
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102 *signum = SIGALRM;
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103 return true;
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104 #endif
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105 }
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106 else if (! strcmp (signame, "SIGBUS"))
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107 {
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108 #if defined (SIGBUS)
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109 *signum = SIGBUS;
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110 return true;
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111 #endif
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112 }
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113 else if (! strcmp (signame, "SIGCHLD"))
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114 {
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115 #if defined (SIGCHLD)
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116 *signum = SIGCHLD;
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117 return true;
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118 #endif
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119 }
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120 else if (! strcmp (signame, "SIGCLD"))
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121 {
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122 #if defined (SIGCLD)
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123 *signum = SIGCLD;
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124 return true;
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125 #endif
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126 }
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127 else if (! strcmp (signame, "SIGCONT"))
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128 {
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129 #if defined (SIGCONT)
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130 *signum = SIGCONT;
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131 return true;
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132 #endif
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133 }
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134 else if (! strcmp (signame, "SIGEMT"))
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135 {
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136 #if defined (SIGEMT)
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137 *signum = SIGEMT;
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138 return true;
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139 #endif
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140 }
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141 else if (! strcmp (signame, "SIGFPE"))
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142 {
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143 #if defined (SIGFPE)
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144 *signum = SIGFPE;
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145 return true;
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146 #endif
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147 }
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148 else if (! strcmp (signame, "SIGHUP"))
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149 {
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150 #if defined (SIGHUP)
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151 *signum = SIGHUP;
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152 return true;
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diff changeset
153 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
154 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
155 else if (! strcmp (signame, "SIGILL"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
156 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
157 #if defined (SIGILL)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
158 *signum = SIGILL;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
159 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
160 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
161 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
162 else if (! strcmp (signame, "SIGINFO"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
163 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
164 #if defined (SIGINFO)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
165 *signum = SIGINFO;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
166 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
167 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
168 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
169 else if (! strcmp (signame, "SIGINT"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
170 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
171 #if defined (SIGINT)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
172 *signum = SIGINT;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
173 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
174 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
175 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
176 else if (! strcmp (signame, "SIGIOT"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
177 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
178 #if defined (SIGIOT)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
179 *signum = SIGIOT;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
180 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
181 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
182 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
183 else if (! strcmp (signame, "SIGLOST"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
184 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
185 #if defined (SIGLOST)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
186 *signum = SIGLOST;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
187 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
188 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
189 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
190 else if (! strcmp (signame, "SIGPIPE"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
191 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
192 #if defined (SIGPIPE)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
193 *signum = SIGPIPE;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
194 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
195 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
196 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
197 else if (! strcmp (signame, "SIGPOLL"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
198 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
199 #if defined (SIGPOLL)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
200 *signum = SIGPOLL;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
201 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
202 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
203 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
204 else if (! strcmp (signame, "SIGPROF"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
205 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
206 #if defined (SIGPROF)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
207 *signum = SIGPROF;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
208 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
209 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
210 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
211 else if (! strcmp (signame, "SIGPWR"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
212 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
213 #if defined (SIGPWR)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
214 *signum = SIGPWR;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
215 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
216 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
217 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
218 else if (! strcmp (signame, "SIGQUIT"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
219 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
220 #if defined (SIGQUIT)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
221 *signum = SIGQUIT;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
222 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
223 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
224 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
225 else if (! strcmp (signame, "SIGSEGV"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
226 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
227 #if defined (SIGSEGV)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
228 *signum = SIGSEGV;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
229 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
230 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
231 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
232 else if (! strcmp (signame, "SIGSTOP"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
233 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
234 #if defined (SIGSTOP)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
235 *signum = SIGSTOP;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
236 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
237 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
238 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
239 else if (! strcmp (signame, "SIGSYS"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
240 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
241 #if defined (SIGSYS)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
242 *signum = SIGSYS;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
243 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
244 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
245 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
246 else if (! strcmp (signame, "SIGTERM"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
247 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
248 #if defined (SIGTERM)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
249 *signum = SIGTERM;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
250 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
251 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
252 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
253 else if (! strcmp (signame, "SIGTRAP"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
254 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
255 #if defined (SIGTRAP)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
256 *signum = SIGTRAP;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
257 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
258 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
259 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
260 else if (! strcmp (signame, "SIGTSTP"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
261 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
262 #if defined (SIGTSTP)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
263 *signum = SIGTSTP;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
264 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
265 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
266 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
267 else if (! strcmp (signame, "SIGTTIN"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
268 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
269 #if defined (SIGTTIN)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
270 *signum = SIGTTIN;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
271 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
272 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
273 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
274 else if (! strcmp (signame, "SIGTTOU"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
275 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
276 #if defined (SIGTTOU)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
277 *signum = SIGTTOU;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
278 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
279 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
280 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
281 else if (! strcmp (signame, "SIGURG"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
282 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
283 #if defined (SIGURG)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
284 *signum = SIGURG;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
285 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
286 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
287 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
288 else if (! strcmp (signame, "SIGUSR1"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
289 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
290 #if defined (SIGUSR1)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
291 *signum = SIGUSR1;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
292 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
293 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
294 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
295 else if (! strcmp (signame, "SIGUSR2"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
296 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
297 #if defined (SIGUSR2)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
298 *signum = SIGUSR2;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
299 return true;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
300 #endif
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
301 }
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
302 else if (! strcmp (signame, "SIGVTALRM"))
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
303 {
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
304 #if defined (SIGVTALRM)
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
305 *signum = SIGVTALRM;
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
parents: 21940
diff changeset
306 return true;
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307 #endif
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308 }
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309 else if (! strcmp (signame, "SIGIO"))
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310 {
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311 #if defined (SIGIO)
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312 *signum = SIGIO;
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313 return true;
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314 #endif
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315 }
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316 else if (! strcmp (signame, "SIGWINCH"))
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317 {
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318 #if defined (SIGWINCH)
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319 *signum = SIGWINCH;
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320 return true;
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321 #endif
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322 }
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323 else if (! strcmp (signame, "SIGXCPU"))
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324 {
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325 #if defined (SIGXCPU)
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326 *signum = SIGXCPU;
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327 return true;
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328 #endif
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329 }
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330 else if (! strcmp (signame, "SIGXFSZ"))
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331 {
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332 #if defined (SIGXFSZ)
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333 *signum = SIGXFSZ;
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334 return true;
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335 #endif
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336 }
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337
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338 return false;
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339 }
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340
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341 octave_sig_handler *
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342 octave_set_signal_handler_internal (int sig, octave_sig_handler *handler,
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343 bool restart_syscalls)
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344 {
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345 struct sigaction act, oact;
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346
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347 act.sa_handler = handler;
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348 act.sa_flags = 0;
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349
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350 #if defined (SIGALRM)
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351 if (sig == SIGALRM)
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352 {
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353 # if defined (SA_INTERRUPT)
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354 act.sa_flags |= SA_INTERRUPT;
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355 # endif
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356 }
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357 #endif
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358 #if defined (SA_RESTART)
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359 # if defined (SIGALRM)
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360 else
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361 # endif
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362 // FIXME: Do we also need to explicitly disable SA_RESTART?
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363 if (restart_syscalls)
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364 act.sa_flags |= SA_RESTART;
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365 #endif
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366
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367 sigemptyset (&act.sa_mask);
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368 sigemptyset (&oact.sa_mask);
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369
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370 sigaction (sig, &act, &oact);
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371
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372 return oact.sa_handler;
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373 }
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374
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375 octave_sig_handler *
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376 octave_set_signal_handler_by_name (const char *signame,
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377 octave_sig_handler *handler,
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378 bool restart_syscalls)
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379 {
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380 int sig;
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381
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382 return (octave_get_sig_number (signame, &sig)
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383 ? octave_set_signal_handler_internal (sig, handler, restart_syscalls)
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384 : 0);
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385 }
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386
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387 int
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388 octave_num_signals (void)
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389 {
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390 return NSIG;
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391 }
1d23b75cbcd1 hide signal.h from C++ sources
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392
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393 typedef struct
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394 {
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395 sigset_t nvar;
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396 sigset_t ovar;
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397 } sigset_info;
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398
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399 void *
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400 octave_block_child (void)
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diff changeset
401 {
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402 #if defined (SIGCHLD)
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403
1d23b75cbcd1 hide signal.h from C++ sources
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404 sigset_info *context = (sigset_info *) malloc (sizeof (sigset_info));
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405
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
406 if (context)
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diff changeset
407 {
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408 sigemptyset (&(context->nvar));
1d23b75cbcd1 hide signal.h from C++ sources
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409 sigaddset (&(context->nvar), SIGCHLD);
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diff changeset
410 sigemptyset (&(context->ovar));
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411 sigprocmask (SIG_BLOCK, &(context->nvar), &(context->ovar));
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412 }
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
413
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diff changeset
414 return context;
1d23b75cbcd1 hide signal.h from C++ sources
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415
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
416 #else
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417
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418 return 0;
1d23b75cbcd1 hide signal.h from C++ sources
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419
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420 #endif
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421 }
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422
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diff changeset
423 void
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diff changeset
424 octave_unblock_child (void *context_arg)
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diff changeset
425 {
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
426 if (context_arg)
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
427 {
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diff changeset
428 sigset_info *context = (sigset_info *) context_arg;
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diff changeset
429
1d23b75cbcd1 hide signal.h from C++ sources
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430 sigprocmask (SIG_SETMASK, &(context->ovar), 0);
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diff changeset
431
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
432 free (context);
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
433 }
1d23b75cbcd1 hide signal.h from C++ sources
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parents: 21940
diff changeset
434 }
1d23b75cbcd1 hide signal.h from C++ sources
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parents: 21940
diff changeset
435
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
436 static void
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
437 block_or_unblock_signal (int how, int sig)
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
438 {
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
439 #if ! defined (__WIN32__) || defined (__CYGWIN__)
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
440 // Blocking/unblocking signals at thread level is only supported
1d23b75cbcd1 hide signal.h from C++ sources
John W. Eaton <jwe@octave.org>
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diff changeset
441 // on platform with fully compliant POSIX threads. This is not
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
442 // supported on Win32. Moreover, we have to make sure that SIGINT
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
443 // handler is not installed before calling AllocConsole: installing
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
444 // a SIGINT handler internally calls SetConsoleCtrlHandler, which
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
445 // must be called after AllocConsole to be effective.
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
446
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
447 sigset_t signal_mask;
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
448
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
449 sigemptyset (&signal_mask);
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
450
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
451 sigaddset (&signal_mask, sig);
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diff changeset
452
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
453 pthread_sigmask (how, &signal_mask, 0);
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diff changeset
454 #endif
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diff changeset
455 }
1d23b75cbcd1 hide signal.h from C++ sources
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parents: 21940
diff changeset
456
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
457 void
1d23b75cbcd1 hide signal.h from C++ sources
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diff changeset
458 octave_block_interrupt_signal (void)
1d23b75cbcd1 hide signal.h from C++ sources
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459 {
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460 block_or_unblock_signal (SIG_BLOCK, SIGINT);
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461 }
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462
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463 void
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464 octave_unblock_interrupt_signal (void)
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465 {
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466 block_or_unblock_signal (SIG_UNBLOCK, SIGINT);
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467 }
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468
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469
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470 /* Allow us to save the signal mask and then restore it to the most
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471 recently saved value. This is necessary when using the POSIX signal
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472 handling interface on some systems calling longjmp out of the signal
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473 handler to get to the top level on an interrupt doesn't restore the
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474 original signal mask. Alternatively, we could use
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475 sigsetjmp/siglongjmp, but saving and restoring the signal mask
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476 ourselves works ok and seems simpler just now. */
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477
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478 static sigset_t octave_signal_mask;
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479
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480 void
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481 octave_save_signal_mask (void)
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482 {
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483 sigprocmask (0, 0, &octave_signal_mask);
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484 }
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485
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486 void
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487 octave_restore_signal_mask (void)
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488 {
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489 sigprocmask (SIG_SETMASK, &octave_signal_mask, 0);
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490 }
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491
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492 int
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493 octave_raise_wrapper (int signum)
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494 {
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495 return raise (signum);
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496 }