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SDL_fatal.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2010 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* General fatal signal handling code for SDL */
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#ifdef HAVE_SIGNAL_H
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#include <signal.h>
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#include "SDL.h"
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#include "SDL_fatal.h"
/* This installs some signal handlers for the more common fatal signals,
so that if the programmer is lazy, the app doesn't die so horribly if
the program crashes.
*/
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static void
SDL_Parachute(int sig)
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signal(sig, SIG_DFL);
SDL_Quit();
raise(sig);
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}
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static const int SDL_fatal_signals[] = {
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#ifdef SIGBUS
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#endif
#ifdef SIGFPE
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#endif
#ifdef SIGQUIT
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#endif
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};
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void
SDL_InstallParachute(void)
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/* Set a handler for any fatal signal not already handled */
int i;
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#ifdef HAVE_SIGACTION
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struct sigaction action;
for (i = 0; SDL_fatal_signals[i]; ++i) {
sigaction(SDL_fatal_signals[i], NULL, &action);
if (action.sa_handler == SIG_DFL) {
action.sa_handler = SDL_Parachute;
sigaction(SDL_fatal_signals[i], &action, NULL);
}
}
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#ifdef SIGALRM
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/* Set SIGALRM to be ignored -- necessary on Solaris */
sigaction(SIGALRM, NULL, &action);
if (action.sa_handler == SIG_DFL) {
action.sa_handler = SIG_IGN;
sigaction(SIGALRM, &action, NULL);
}
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void (*ohandler) (int);
for (i = 0; SDL_fatal_signals[i]; ++i) {
ohandler = signal(SDL_fatal_signals[i], SDL_Parachute);
if (ohandler != SIG_DFL) {
signal(SDL_fatal_signals[i], ohandler);
}
}
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#endif /* HAVE_SIGACTION */
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}
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void
SDL_UninstallParachute(void)
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/* Remove a handler for any fatal signal handled */
int i;
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#ifdef HAVE_SIGACTION
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struct sigaction action;
for (i = 0; SDL_fatal_signals[i]; ++i) {
sigaction(SDL_fatal_signals[i], NULL, &action);
if (action.sa_handler == SDL_Parachute) {
action.sa_handler = SIG_DFL;
sigaction(SDL_fatal_signals[i], &action, NULL);
}
}
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void (*ohandler) (int);
for (i = 0; SDL_fatal_signals[i]; ++i) {
ohandler = signal(SDL_fatal_signals[i], SIG_DFL);
if (ohandler != SDL_Parachute) {
signal(SDL_fatal_signals[i], ohandler);
}
}
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#endif /* HAVE_SIGACTION */
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}
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#else
/* No signals on this platform, nothing to do.. */
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void
SDL_InstallParachute(void)
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void
SDL_UninstallParachute(void)
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}
#endif /* HAVE_SIGNAL_H */
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/* vi: set ts=4 sw=4 expandtab: */