src/events/SDL_quit.c
author Holmes Futrell <hfutrell@umail.ucsb.edu>
Fri, 11 Jul 2008 00:28:50 +0000
branchgsoc2008_iphone
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 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,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    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
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    License along with this library; if not, write to the Free Software
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    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 quit handling code for SDL */
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#ifdef HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#include "SDL_events.h"
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#include "SDL_events_c.h"
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#ifdef HAVE_SIGNAL_H
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static void
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SDL_HandleSIG(int sig)
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{
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    /* Reset the signal handler */
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    signal(sig, SDL_HandleSIG);
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    /* Signal a quit interrupt */
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    SDL_SendQuit();
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}
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#endif /* HAVE_SIGNAL_H */
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/* Public functions */
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int
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SDL_QuitInit(void)
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{
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#ifdef HAVE_SIGNAL_H
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    void (*ohandler) (int);
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    /* Both SIGINT and SIGTERM are translated into quit interrupts */
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    ohandler = signal(SIGINT, SDL_HandleSIG);
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    if (ohandler != SIG_DFL)
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        signal(SIGINT, ohandler);
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    ohandler = signal(SIGTERM, SDL_HandleSIG);
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    if (ohandler != SIG_DFL)
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        signal(SIGTERM, ohandler);
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#endif /* HAVE_SIGNAL_H */
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    /* That's it! */
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    return (0);
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}
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void
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SDL_QuitQuit(void)
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{
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#ifdef HAVE_SIGNAL_H
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    void (*ohandler) (int);
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    ohandler = signal(SIGINT, SIG_DFL);
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    if (ohandler != SDL_HandleSIG)
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        signal(SIGINT, ohandler);
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    ohandler = signal(SIGTERM, SIG_DFL);
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    if (ohandler != SDL_HandleSIG)
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        signal(SIGTERM, ohandler);
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#endif /* HAVE_SIGNAL_H */
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}
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/* This function returns 1 if it's okay to close the application window */
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int
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SDL_SendQuit(void)
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{
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    int posted;
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    posted = 0;
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    if (SDL_ProcessEvents[SDL_QUIT] == SDL_ENABLE) {
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        SDL_Event event;
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        event.type = SDL_QUIT;
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        posted = (SDL_PushEvent(&event) > 0);
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    }
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    return (posted);
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}
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/* vi: set ts=4 sw=4 expandtab: */