src/SDL_fatal.c
author Sam Lantinga <slouken@libsdl.org>
Thu, 06 May 2004 15:55:06 +0000
changeset 886 05c551e5bc64
parent 861 863da1c38c7e
child 1152 51a8702d8ecd
permissions -rw-r--r--
Date: Sat, 24 Apr 2004 15:13:32 +0300 From: "Mike Gorchak" Subject: SDL updates for the QNX6 1. Updated the README.QNX 2. Updated libtool scripts, which are shipped with SDL for QNX6 support. 3. Added some code to support the new QNX 6.3.0, which is in beta now. 4. Added code to detect the hw features, which driver supports. 5. Added hw alpha blits code. 6. Fixed bug when application switches to fullscreen more the 2 times. (afte\ r that window becames always stay on top). 7. Updated a bit README for the tests. 8. Added information about acceleration show in the testalpha.c test. 9. Added small fixes to the testoverlay2.c test. 10. Added alpha and cc+alpha blits benchmarks to the testvidinfo.c test.

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

/* General fatal signal handling code for SDL */

#ifdef NO_SIGNAL_H

/* No signals on this platform, nothing to do.. */

void SDL_InstallParachute(void)
{
	return;
}

void SDL_UninstallParachute(void)
{
	return;
}

#else

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <string.h>

#include "SDL.h"
#include "SDL_fatal.h"

#ifdef __CYGWIN__
#define DISABLE_STDIO
#endif

/* 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.
*/

static void print_msg(const char *text)
{
#ifndef DISABLE_STDIO
	fprintf(stderr, "%s", text);
#endif
}

static void SDL_Parachute(int sig)
{
	signal(sig, SIG_DFL);
	print_msg("Fatal signal: ");
	switch (sig) {
		case SIGSEGV:
			print_msg("Segmentation Fault");
			break;
#ifdef SIGBUS
#if SIGBUS != SIGSEGV
		case SIGBUS:
			print_msg("Bus Error");
			break;
#endif
#endif /* SIGBUS */
#ifdef SIGFPE
		case SIGFPE:
			print_msg("Floating Point Exception");
			break;
#endif /* SIGFPE */
#ifdef SIGQUIT
		case SIGQUIT:
			print_msg("Keyboard Quit");
			break;
#endif /* SIGQUIT */
#ifdef SIGPIPE
		case SIGPIPE:
			print_msg("Broken Pipe");
			break;
#endif /* SIGPIPE */
		default:
#ifndef DISABLE_STDIO
			fprintf(stderr, "# %d", sig);
#endif
			break;
	}
	print_msg(" (SDL Parachute Deployed)\n");
	SDL_Quit();
	exit(-sig);
}

static int SDL_fatal_signals[] = {
	SIGSEGV,
#ifdef SIGBUS
	SIGBUS,
#endif
#ifdef SIGFPE
	SIGFPE,
#endif
#ifdef SIGQUIT
	SIGQUIT,
#endif
	0
};

void SDL_InstallParachute(void)
{
	/* Set a handler for any fatal signal not already handled */
	int i;
#ifdef HAVE_SIGACTION
	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);
		}
	}
#ifdef SIGALRM
	/* 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);
	}
#endif
#else
	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);
		}
	}
#endif /* HAVE_SIGACTION */
	return;
}

void SDL_UninstallParachute(void)
{
	/* Remove a handler for any fatal signal handled */
	int i;
#ifdef HAVE_SIGACTION
	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);
		}
	}
#else
	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);
		}
	}
#endif /* HAVE_SIGACTION */
}

#endif /* NO_SIGNAL_H */