Mercurial > sdl-ios-xcode
annotate src/SDL_fatal.c @ 641:df178851293b
Date: 28 Jun 2003 22:42:52 +0100
From: Alan Swanson
Subject: Re: [SDL] New XFree 4.3 Video Mode Patch
I have a wee amendment that moves the qsort in set_best_resolution
to only occur after failing to find an exact match only. This would
make absolutely sure we get a user set mode.
While I've never had any problems for my normal resolutions (1280x1024,
1024x768, 800x600 & 640,480) while closely examining the output from
qsort I've noticed it doesn't seem to sort the modes fully. These is
one definite wrong at 1152x768 and a few that just look wrong to me.
From a program (attached) I made to examine this more easily. X has
sorted its mode list using the same method as ours (plus frequency),
and our user modes get inserted without any other movement.
On the patch I've made I've also changed cmpmodes to sort on vertical
resolution and then horizontal. Ie vertical is now most significant
bit.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 28 Jun 2003 21:52:26 +0000 |
| parents | f6ffac90895c |
| children | b8d311d90021 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 | |
| 28 /* General fatal signal handling code for SDL */ | |
| 29 | |
| 30 #ifdef NO_SIGNAL_H | |
| 31 | |
| 32 /* No signals on this platform, nothing to do.. */ | |
| 33 | |
| 34 void SDL_InstallParachute(void) | |
| 35 { | |
| 36 return; | |
| 37 } | |
| 38 | |
| 39 void SDL_UninstallParachute(void) | |
| 40 { | |
| 41 return; | |
| 42 } | |
| 43 | |
| 44 #else | |
| 45 | |
| 46 #include <stdlib.h> | |
| 47 #include <stdio.h> | |
| 48 #include <signal.h> | |
| 49 #include <string.h> | |
| 50 | |
| 51 #include "SDL.h" | |
| 52 #include "SDL_fatal.h" | |
| 53 | |
|
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54 #ifdef __CYGWIN__ |
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55 #define DISABLE_STDIO |
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56 #endif |
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57 |
| 0 | 58 /* This installs some signal handlers for the more common fatal signals, |
| 59 so that if the programmer is lazy, the app doesn't die so horribly if | |
| 60 the program crashes. | |
| 61 */ | |
| 62 | |
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63 static void print_msg(const char *text) |
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64 { |
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65 #ifndef DISABLE_STDIO |
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66 fprintf(stderr, "%s", text); |
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67 #endif |
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68 } |
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69 |
| 0 | 70 static void SDL_Parachute(int sig) |
| 71 { | |
| 72 signal(sig, SIG_DFL); | |
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73 print_msg("Fatal signal: "); |
| 0 | 74 switch (sig) { |
| 75 case SIGSEGV: | |
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76 print_msg("Segmentation Fault"); |
| 0 | 77 break; |
| 78 #ifdef SIGBUS | |
| 79 #if SIGBUS != SIGSEGV | |
| 80 case SIGBUS: | |
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81 print_msg("Bus Error"); |
| 0 | 82 break; |
| 83 #endif | |
| 84 #endif /* SIGBUS */ | |
| 85 #ifdef SIGFPE | |
| 86 case SIGFPE: | |
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87 print_msg("Floating Point Exception"); |
| 0 | 88 break; |
| 89 #endif /* SIGFPE */ | |
| 90 #ifdef SIGQUIT | |
| 91 case SIGQUIT: | |
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92 print_msg("Keyboard Quit"); |
| 0 | 93 break; |
| 94 #endif /* SIGQUIT */ | |
| 95 #ifdef SIGPIPE | |
| 96 case SIGPIPE: | |
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97 print_msg("Broken Pipe"); |
| 0 | 98 break; |
| 99 #endif /* SIGPIPE */ | |
| 100 default: | |
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101 #ifndef DISABLE_STDIO |
| 0 | 102 fprintf(stderr, "# %d", sig); |
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103 #endif |
| 0 | 104 break; |
| 105 } | |
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106 print_msg(" (SDL Parachute Deployed)\n"); |
| 0 | 107 SDL_Quit(); |
| 108 exit(-sig); | |
| 109 } | |
| 110 | |
| 111 static int SDL_fatal_signals[] = { | |
| 112 SIGSEGV, | |
| 113 #ifdef SIGBUS | |
| 114 SIGBUS, | |
| 115 #endif | |
| 116 #ifdef SIGFPE | |
| 117 SIGFPE, | |
| 118 #endif | |
| 119 #ifdef SIGQUIT | |
| 120 SIGQUIT, | |
| 121 #endif | |
| 122 #ifdef SIGPIPE | |
| 123 SIGPIPE, | |
| 124 #endif | |
| 125 0 | |
| 126 }; | |
| 127 | |
| 128 void SDL_InstallParachute(void) | |
| 129 { | |
| 130 int i; | |
| 131 void (*ohandler)(int); | |
| 132 | |
| 133 /* Set a handler for any fatal signal not already handled */ | |
| 134 for ( i=0; SDL_fatal_signals[i]; ++i ) { | |
| 135 ohandler = signal(SDL_fatal_signals[i], SDL_Parachute); | |
| 136 if ( ohandler != SIG_DFL ) { | |
| 137 signal(SDL_fatal_signals[i], ohandler); | |
| 138 } | |
| 139 } | |
| 140 #ifdef SIGALRM | |
| 141 /* Set SIGALRM to be ignored -- necessary on Solaris */ | |
| 142 { | |
| 143 struct sigaction action, oaction; | |
| 144 | |
| 145 /* Set SIG_IGN action */ | |
| 146 memset(&action, 0, (sizeof action)); | |
| 147 action.sa_handler = SIG_IGN; | |
| 148 sigaction(SIGALRM, &action, &oaction); | |
| 149 | |
| 150 /* Reset original action if it was already being handled */ | |
| 151 if ( oaction.sa_handler != SIG_DFL ) { | |
| 152 sigaction(SIGALRM, &oaction, NULL); | |
| 153 } | |
| 154 } | |
| 155 #endif | |
| 156 return; | |
| 157 } | |
| 158 | |
| 159 void SDL_UninstallParachute(void) | |
| 160 { | |
| 161 int i; | |
| 162 void (*ohandler)(int); | |
| 163 | |
| 164 /* Remove a handler for any fatal signal handled */ | |
| 165 for ( i=0; SDL_fatal_signals[i]; ++i ) { | |
| 166 ohandler = signal(SDL_fatal_signals[i], SIG_DFL); | |
| 167 if ( ohandler != SDL_Parachute ) { | |
| 168 signal(SDL_fatal_signals[i], ohandler); | |
| 169 } | |
| 170 } | |
| 171 } | |
| 172 | |
| 173 #endif /* NO_SIGNAL_H */ |