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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 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 SDL_Parachute(int sig) |
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39 { |
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40 signal(sig, SIG_DFL); |
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41 SDL_Quit(); |
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42 raise(sig); |
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43 } |
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44 |
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45 static int SDL_fatal_signals[] = { |
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46 SIGSEGV, |
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47 #ifdef SIGBUS |
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48 SIGBUS, |
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49 #endif |
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50 #ifdef SIGFPE |
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51 SIGFPE, |
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52 #endif |
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53 #ifdef SIGQUIT |
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54 SIGQUIT, |
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55 #endif |
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56 0 |
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57 }; |
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58 |
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59 void SDL_InstallParachute(void) |
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60 { |
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61 /* Set a handler for any fatal signal not already handled */ |
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62 int i; |
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63 #ifdef HAVE_SIGACTION |
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64 struct sigaction action; |
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65 |
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66 for ( i=0; SDL_fatal_signals[i]; ++i ) { |
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67 sigaction(SDL_fatal_signals[i], NULL, &action); |
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68 if ( action.sa_handler == SIG_DFL ) { |
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69 action.sa_handler = SDL_Parachute; |
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70 sigaction(SDL_fatal_signals[i], &action, NULL); |
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71 } |
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72 } |
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73 #ifdef SIGALRM |
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74 /* Set SIGALRM to be ignored -- necessary on Solaris */ |
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75 sigaction(SIGALRM, NULL, &action); |
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76 if ( action.sa_handler == SIG_DFL ) { |
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77 action.sa_handler = SIG_IGN; |
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78 sigaction(SIGALRM, &action, NULL); |
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79 } |
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80 #endif |
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81 #else |
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82 void (*ohandler)(int); |
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83 |
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84 for ( i=0; SDL_fatal_signals[i]; ++i ) { |
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85 ohandler = signal(SDL_fatal_signals[i], SDL_Parachute); |
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86 if ( ohandler != SIG_DFL ) { |
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87 signal(SDL_fatal_signals[i], ohandler); |
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88 } |
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89 } |
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90 #endif /* HAVE_SIGACTION */ |
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91 return; |
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92 } |
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93 |
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94 void SDL_UninstallParachute(void) |
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95 { |
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96 /* Remove a handler for any fatal signal handled */ |
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97 int i; |
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98 #ifdef HAVE_SIGACTION |
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99 struct sigaction action; |
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100 |
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101 for ( i=0; SDL_fatal_signals[i]; ++i ) { |
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102 sigaction(SDL_fatal_signals[i], NULL, &action); |
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103 if ( action.sa_handler == SDL_Parachute ) { |
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104 action.sa_handler = SIG_DFL; |
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105 sigaction(SDL_fatal_signals[i], &action, NULL); |
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106 } |
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107 } |
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108 #else |
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109 void (*ohandler)(int); |
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110 |
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111 for ( i=0; SDL_fatal_signals[i]; ++i ) { |
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112 ohandler = signal(SDL_fatal_signals[i], SIG_DFL); |
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113 if ( ohandler != SDL_Parachute ) { |
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114 signal(SDL_fatal_signals[i], ohandler); |
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115 } |
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116 } |
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117 #endif /* HAVE_SIGACTION */ |
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118 } |
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119 |
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120 #else |
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121 |
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122 /* No signals on this platform, nothing to do.. */ |
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123 |
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124 void SDL_InstallParachute(void) |
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125 { |
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126 return; |
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127 } |
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128 |
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129 void SDL_UninstallParachute(void) |
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130 { |
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131 return; |
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132 } |
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133 |
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134 #endif /* HAVE_SIGNAL_H */ |