Mercurial > sdl-ios-xcode
view src/SDL_fatal.c @ 2938:2929ed239d2a
Adjusted default choice of audio driver.
If a driver can definitely see available devices, it is chosen. Otherwise,
we'll take the first driver that initializes but saw no devices...this might
be because it can't enumerate them, or there really aren't any available.
This prevents the dsp driver from hogging control when there are no /dev/dsp*
nodes (for example, on a Linux box with ALSA and no OSS emulation).
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Thu, 01 Jan 2009 07:54:58 +0000 |
parents | 99210400e8b9 |
children | 0b160c970b7e |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. 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 Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" /* General fatal signal handling code for SDL */ #ifdef HAVE_SIGNAL_H #include <signal.h> #include "SDL.h" #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. */ static void SDL_Parachute(int sig) { signal(sig, SIG_DFL); SDL_Quit(); raise(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 */ } #else /* No signals on this platform, nothing to do.. */ void SDL_InstallParachute(void) { return; } void SDL_UninstallParachute(void) { return; } #endif /* HAVE_SIGNAL_H */ /* vi: set ts=4 sw=4 expandtab: */