Mercurial > sdl-ios-xcode
annotate src/SDL_fatal.c @ 1232:0aa0000081d5
Added optimized C 32bit RGB<->RGBA alpha masking blitter from Alex Volkov.
Fixes Bugzilla #11.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 05 Jan 2006 16:40:51 +0000 |
| parents | 51a8702d8ecd |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 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 | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
|
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28 #ifdef _WIN32_WCE |
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29 #define NO_SIGNAL_H |
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30 #endif |
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31 |
| 0 | 32 /* General fatal signal handling code for SDL */ |
| 33 | |
| 34 #ifdef NO_SIGNAL_H | |
| 35 | |
| 36 /* No signals on this platform, nothing to do.. */ | |
| 37 | |
| 38 void SDL_InstallParachute(void) | |
| 39 { | |
| 40 return; | |
| 41 } | |
| 42 | |
| 43 void SDL_UninstallParachute(void) | |
| 44 { | |
| 45 return; | |
| 46 } | |
| 47 | |
| 48 #else | |
| 49 | |
| 50 #include <stdlib.h> | |
| 51 #include <stdio.h> | |
| 52 #include <signal.h> | |
| 53 #include <string.h> | |
| 54 | |
| 55 #include "SDL.h" | |
| 56 #include "SDL_fatal.h" | |
| 57 | |
|
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58 #ifdef __CYGWIN__ |
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59 #define DISABLE_STDIO |
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60 #endif |
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61 |
| 0 | 62 /* This installs some signal handlers for the more common fatal signals, |
| 63 so that if the programmer is lazy, the app doesn't die so horribly if | |
| 64 the program crashes. | |
| 65 */ | |
| 66 | |
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67 static void print_msg(const char *text) |
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68 { |
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69 #ifndef DISABLE_STDIO |
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70 fprintf(stderr, "%s", text); |
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71 #endif |
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72 } |
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73 |
| 0 | 74 static void SDL_Parachute(int sig) |
| 75 { | |
| 76 signal(sig, SIG_DFL); | |
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77 print_msg("Fatal signal: "); |
| 0 | 78 switch (sig) { |
| 79 case SIGSEGV: | |
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80 print_msg("Segmentation Fault"); |
| 0 | 81 break; |
| 82 #ifdef SIGBUS | |
| 83 #if SIGBUS != SIGSEGV | |
| 84 case SIGBUS: | |
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85 print_msg("Bus Error"); |
| 0 | 86 break; |
| 87 #endif | |
| 88 #endif /* SIGBUS */ | |
| 89 #ifdef SIGFPE | |
| 90 case SIGFPE: | |
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91 print_msg("Floating Point Exception"); |
| 0 | 92 break; |
| 93 #endif /* SIGFPE */ | |
| 94 #ifdef SIGQUIT | |
| 95 case SIGQUIT: | |
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96 print_msg("Keyboard Quit"); |
| 0 | 97 break; |
| 98 #endif /* SIGQUIT */ | |
| 99 #ifdef SIGPIPE | |
| 100 case SIGPIPE: | |
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101 print_msg("Broken Pipe"); |
| 0 | 102 break; |
| 103 #endif /* SIGPIPE */ | |
| 104 default: | |
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105 #ifndef DISABLE_STDIO |
| 0 | 106 fprintf(stderr, "# %d", sig); |
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107 #endif |
| 0 | 108 break; |
| 109 } | |
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110 print_msg(" (SDL Parachute Deployed)\n"); |
| 0 | 111 SDL_Quit(); |
| 112 exit(-sig); | |
| 113 } | |
| 114 | |
| 115 static int SDL_fatal_signals[] = { | |
| 116 SIGSEGV, | |
| 117 #ifdef SIGBUS | |
| 118 SIGBUS, | |
| 119 #endif | |
| 120 #ifdef SIGFPE | |
| 121 SIGFPE, | |
| 122 #endif | |
| 123 #ifdef SIGQUIT | |
| 124 SIGQUIT, | |
| 125 #endif | |
| 126 0 | |
| 127 }; | |
| 128 | |
| 129 void SDL_InstallParachute(void) | |
| 130 { | |
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131 /* Set a handler for any fatal signal not already handled */ |
| 0 | 132 int i; |
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133 #ifdef HAVE_SIGACTION |
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134 struct sigaction action; |
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135 |
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136 for ( i=0; SDL_fatal_signals[i]; ++i ) { |
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137 sigaction(SDL_fatal_signals[i], NULL, &action); |
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138 if ( action.sa_handler == SIG_DFL ) { |
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139 action.sa_handler = SDL_Parachute; |
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140 sigaction(SDL_fatal_signals[i], &action, NULL); |
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141 } |
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142 } |
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143 #ifdef SIGALRM |
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144 /* Set SIGALRM to be ignored -- necessary on Solaris */ |
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145 sigaction(SIGALRM, NULL, &action); |
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146 if ( action.sa_handler == SIG_DFL ) { |
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147 action.sa_handler = SIG_IGN; |
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148 sigaction(SIGALRM, &action, NULL); |
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149 } |
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150 #endif |
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151 #else |
| 0 | 152 void (*ohandler)(int); |
| 153 | |
| 154 for ( i=0; SDL_fatal_signals[i]; ++i ) { | |
| 155 ohandler = signal(SDL_fatal_signals[i], SDL_Parachute); | |
| 156 if ( ohandler != SIG_DFL ) { | |
| 157 signal(SDL_fatal_signals[i], ohandler); | |
| 158 } | |
| 159 } | |
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160 #endif /* HAVE_SIGACTION */ |
| 0 | 161 return; |
| 162 } | |
| 163 | |
| 164 void SDL_UninstallParachute(void) | |
| 165 { | |
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166 /* Remove a handler for any fatal signal handled */ |
| 0 | 167 int i; |
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168 #ifdef HAVE_SIGACTION |
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169 struct sigaction action; |
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170 |
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171 for ( i=0; SDL_fatal_signals[i]; ++i ) { |
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172 sigaction(SDL_fatal_signals[i], NULL, &action); |
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173 if ( action.sa_handler == SDL_Parachute ) { |
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174 action.sa_handler = SIG_DFL; |
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175 sigaction(SDL_fatal_signals[i], &action, NULL); |
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176 } |
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177 } |
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178 #else |
| 0 | 179 void (*ohandler)(int); |
| 180 | |
| 181 for ( i=0; SDL_fatal_signals[i]; ++i ) { | |
| 182 ohandler = signal(SDL_fatal_signals[i], SIG_DFL); | |
| 183 if ( ohandler != SDL_Parachute ) { | |
| 184 signal(SDL_fatal_signals[i], ohandler); | |
| 185 } | |
| 186 } | |
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187 #endif /* HAVE_SIGACTION */ |
| 0 | 188 } |
| 189 | |
| 190 #endif /* NO_SIGNAL_H */ |