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annotate src/SDL_fatal.c @ 2893:e67f3f3bf221
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author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 20 Dec 2008 18:40:30 +0000 |
parents | 99210400e8b9 |
children | 0b160c970b7e |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
2859 | 3 Copyright (C) 1997-2009 Sam Lantinga |
0 | 4 |
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 |
0 | 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. |
0 | 9 |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
0 | 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 |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
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22 #include "SDL_config.h" |
0 | 23 |
24 /* General fatal signal handling code for SDL */ | |
25 | |
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26 #ifdef HAVE_SIGNAL_H |
0 | 27 |
28 #include <signal.h> | |
29 | |
30 #include "SDL.h" | |
31 #include "SDL_fatal.h" | |
32 | |
33 /* This installs some signal handlers for the more common fatal signals, | |
34 so that if the programmer is lazy, the app doesn't die so horribly if | |
35 the program crashes. | |
36 */ | |
37 | |
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38 static void |
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39 SDL_Parachute(int sig) |
0 | 40 { |
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41 signal(sig, SIG_DFL); |
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42 SDL_Quit(); |
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43 raise(sig); |
0 | 44 } |
45 | |
46 static int SDL_fatal_signals[] = { | |
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47 SIGSEGV, |
0 | 48 #ifdef SIGBUS |
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49 SIGBUS, |
0 | 50 #endif |
51 #ifdef SIGFPE | |
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52 SIGFPE, |
0 | 53 #endif |
54 #ifdef SIGQUIT | |
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55 SIGQUIT, |
0 | 56 #endif |
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57 0 |
0 | 58 }; |
59 | |
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60 void |
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61 SDL_InstallParachute(void) |
0 | 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); |
0 | 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; |
0 | 94 } |
95 | |
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96 void |
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97 SDL_UninstallParachute(void) |
0 | 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); |
0 | 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 */ |
0 | 121 } |
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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137 } |
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138 |
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139 #endif /* HAVE_SIGNAL_H */ |
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140 /* vi: set ts=4 sw=4 expandtab: */ |