| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2012 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 quit handling code for SDL */ |
| |
| #ifdef HAVE_SIGNAL_H |
| #include <signal.h> |
| #endif |
| |
| #include "SDL_events.h" |
| #include "SDL_events_c.h" |
| |
| |
| #ifdef HAVE_SIGNAL_H |
| static void SDL_HandleSIG(int sig) |
| { |
| /* Reset the signal handler */ |
| signal(sig, SDL_HandleSIG); |
| |
| /* Signal a quit interrupt */ |
| SDL_PrivateQuit(); |
| } |
| #endif /* HAVE_SIGNAL_H */ |
| |
| /* Public functions */ |
| int SDL_QuitInit(void) |
| { |
| #ifdef HAVE_SIGACTION |
| struct sigaction action; |
| sigaction(SIGINT, NULL, &action); |
| # ifdef HAVE_SA_SIGACTION |
| if ( action.sa_handler == SIG_DFL && action.sa_sigaction == (void*)SIG_DFL ) { |
| # else |
| if ( action.sa_handler == SIG_DFL ) { |
| # endif |
| action.sa_handler = SDL_HandleSIG; |
| sigaction(SIGINT, &action, NULL); |
| } |
| sigaction(SIGTERM, NULL, &action); |
| # ifdef HAVE_SA_SIGACTION |
| if ( action.sa_handler == SIG_DFL && action.sa_sigaction == (void*)SIG_DFL ) { |
| # else |
| if ( action.sa_handler == SIG_DFL ) { |
| # endif |
| action.sa_handler = SDL_HandleSIG; |
| sigaction(SIGTERM, &action, NULL); |
| } |
| #elif HAVE_SIGNAL_H |
| void (*ohandler)(int); |
| |
| /* Both SIGINT and SIGTERM are translated into quit interrupts */ |
| ohandler = signal(SIGINT, SDL_HandleSIG); |
| if ( ohandler != SIG_DFL ) |
| signal(SIGINT, ohandler); |
| ohandler = signal(SIGTERM, SDL_HandleSIG); |
| if ( ohandler != SIG_DFL ) |
| signal(SIGTERM, ohandler); |
| #endif /* HAVE_SIGNAL_H */ |
| |
| /* That's it! */ |
| return(0); |
| } |
| void SDL_QuitQuit(void) |
| { |
| #ifdef HAVE_SIGACTION |
| struct sigaction action; |
| sigaction(SIGINT, NULL, &action); |
| if ( action.sa_handler == SDL_HandleSIG ) { |
| action.sa_handler = SIG_DFL; |
| sigaction(SIGINT, &action, NULL); |
| } |
| sigaction(SIGTERM, NULL, &action); |
| if ( action.sa_handler == SDL_HandleSIG ) { |
| action.sa_handler = SIG_DFL; |
| sigaction(SIGTERM, &action, NULL); |
| } |
| #elif HAVE_SIGNAL_H |
| void (*ohandler)(int); |
| |
| ohandler = signal(SIGINT, SIG_DFL); |
| if ( ohandler != SDL_HandleSIG ) |
| signal(SIGINT, ohandler); |
| ohandler = signal(SIGTERM, SIG_DFL); |
| if ( ohandler != SDL_HandleSIG ) |
| signal(SIGTERM, ohandler); |
| #endif /* HAVE_SIGNAL_H */ |
| } |
| |
| /* This function returns 1 if it's okay to close the application window */ |
| int SDL_PrivateQuit(void) |
| { |
| int posted; |
| |
| posted = 0; |
| if ( SDL_ProcessEvents[SDL_QUIT] == SDL_ENABLE ) { |
| SDL_Event event; |
| event.type = SDL_QUIT; |
| if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { |
| posted = 1; |
| SDL_PushEvent(&event); |
| } |
| } |
| return(posted); |
| } |