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annotate src/SDL_fatal.c @ 4856:1ff5dfaafdc8

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Condensed flag-setting code and put parantheses in the appropriate places. It was that, in the end.
author egottlieb
date Mon, 16 Aug 2010 01:17:19 -0400
parents f7b03b6838cb
children b530ef003506
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library 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 GNU
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13 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* General fatal signal handling code for SDL */
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25
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26 #ifdef HAVE_SIGNAL_H
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27
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28 #include <signal.h>
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29
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30 #include "SDL.h"
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31 #include "SDL_fatal.h"
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32
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33 /* This installs some signal handlers for the more common fatal signals,
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34 so that if the programmer is lazy, the app doesn't die so horribly if
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35 the program crashes.
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36 */
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37
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38 static void
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39 SDL_Parachute(int sig)
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40 {
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41 signal(sig, SIG_DFL);
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42 SDL_Quit();
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43 raise(sig);
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44 }
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45
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46 static const int SDL_fatal_signals[] = {
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47 SIGSEGV,
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48 #ifdef SIGBUS
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49 SIGBUS,
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50 #endif
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51 #ifdef SIGFPE
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52 SIGFPE,
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53 #endif
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54 #ifdef SIGQUIT
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55 SIGQUIT,
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56 #endif
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57 0
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58 };
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59
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60 void
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61 SDL_InstallParachute(void)
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62 {
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63 /* Set a handler for any fatal signal not already handled */
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64 int i;
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65 #ifdef HAVE_SIGACTION
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66 struct sigaction action;
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67
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68 for (i = 0; SDL_fatal_signals[i]; ++i) {
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69 sigaction(SDL_fatal_signals[i], NULL, &action);
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70 if (action.sa_handler == SIG_DFL) {
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71 action.sa_handler = SDL_Parachute;
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72 sigaction(SDL_fatal_signals[i], &action, NULL);
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73 }
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74 }
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75 #ifdef SIGALRM
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76 /* Set SIGALRM to be ignored -- necessary on Solaris */
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77 sigaction(SIGALRM, NULL, &action);
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78 if (action.sa_handler == SIG_DFL) {
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79 action.sa_handler = SIG_IGN;
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80 sigaction(SIGALRM, &action, NULL);
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81 }
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82 #endif
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83 #else
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84 void (*ohandler) (int);
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85
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86 for (i = 0; SDL_fatal_signals[i]; ++i) {
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87 ohandler = signal(SDL_fatal_signals[i], SDL_Parachute);
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88 if (ohandler != SIG_DFL) {
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89 signal(SDL_fatal_signals[i], ohandler);
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90 }
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91 }
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92 #endif /* HAVE_SIGACTION */
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93 return;
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94 }
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95
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96 void
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97 SDL_UninstallParachute(void)
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98 {
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99 /* Remove a handler for any fatal signal handled */
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100 int i;
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101 #ifdef HAVE_SIGACTION
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102 struct sigaction action;
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103
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104 for (i = 0; SDL_fatal_signals[i]; ++i) {
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105 sigaction(SDL_fatal_signals[i], NULL, &action);
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106 if (action.sa_handler == SDL_Parachute) {
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107 action.sa_handler = SIG_DFL;
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108 sigaction(SDL_fatal_signals[i], &action, NULL);
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109 }
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110 }
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111 #else
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112 void (*ohandler) (int);
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113
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114 for (i = 0; SDL_fatal_signals[i]; ++i) {
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115 ohandler = signal(SDL_fatal_signals[i], SIG_DFL);
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116 if (ohandler != SDL_Parachute) {
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117 signal(SDL_fatal_signals[i], ohandler);
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118 }
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119 }
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120 #endif /* HAVE_SIGACTION */
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121 }
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122
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123 #else
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124
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125 /* No signals on this platform, nothing to do.. */
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126
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127 void
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128 SDL_InstallParachute(void)
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129 {
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130 return;
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131 }
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132
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133 void
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134 SDL_UninstallParachute(void)
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135 {
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136 return;
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450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
137 }
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
138
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
139 #endif /* HAVE_SIGNAL_H */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
140 /* vi: set ts=4 sw=4 expandtab: */