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annotate src/SDL_fatal.c @ 4106:12bb6311fd5d SDL-1.2

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Hans de Goede fixed bug #495 When running boswars: http://www.boswars.org/ on a machine with intel integrathed graphics it crashes when it tries to play the initial theora splashscreen video: X Error of failed request: BadAlloc (insufficient resources for operation) Major opcode of failed request: 140 (XVideo) Minor opcode of failed request: 19 () Serial number of failed request: 25 Current serial number in output stream: 26 boswars: xcb_xlib.c:41: xcb_xlib_lock: Assertion `!c->xlib.lock' failed. Aborted I recognized this problem from a few years back, when I encountered it while working on the Xv blitter for xmame. The problem is that for some reason creation the Xvport and XvImage succeeds, and failure (lack of resources / hw capability?) is only indicated during the first XvPut[Shm]Image. I've written a patch for SDL using the work around for this I developed for xmame (and which is still used successfully in xmame after many years of usage). I'll admit it isn't very pretty, but after investigating several possibilities this was the best option, any other fixes would need changes to the SDL api and abi.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 29 Dec 2007 02:23:48 +0000
parents d910939febfa
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
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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 */