src/events/SDL_quit.c

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FUNCTIONS

This source file includes following functions.
  1. SDL_HandleSIG
  2. SDL_QuitInit
  3. SDL_PrivateQuit

   1 /*
   2     SDL - Simple DirectMedia Layer
   3     Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
   4 
   5     This library is free software; you can redistribute it and/or
   6     modify it under the terms of the GNU Library General Public
   7     License as published by the Free Software Foundation; either
   8     version 2 of the License, or (at your option) any later version.
   9 
  10     This library is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13     Library General Public License for more details.
  14 
  15     You should have received a copy of the GNU Library General Public
  16     License along with this library; if not, write to the Free
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 
  19     Sam Lantinga
  20     slouken@devolution.com
  21 */
  22 
  23 #ifdef SAVE_RCSID
  24 static char rcsid =
  25  "@(#) $Id: SDL_quit.c,v 1.2.2.3 2001/02/10 07:20:04 hercules Exp $";
  26 #endif
  27 
  28 /* General quit handling code for SDL */
  29 
  30 #include <stdio.h>
  31 #ifndef NO_SIGNAL_H
  32 #include <signal.h>
  33 #endif
  34 
  35 #include "SDL_events.h"
  36 #include "SDL_events_c.h"
  37 
  38 
  39 #ifndef NO_SIGNAL_H
  40 static void SDL_HandleSIG(int sig)
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  41 {
  42         /* Reset the signal handler */
  43         signal(sig, SDL_HandleSIG);
  44 
  45         /* Signal a quit interrupt */
  46         SDL_PrivateQuit();
  47 }
  48 #endif /* NO_SIGNAL_H */
  49 
  50 /* Public functions */
  51 int SDL_QuitInit(void)
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  52 {
  53 #ifndef NO_SIGNAL_H
  54         void (*ohandler)(int);
  55 
  56         /* Both SIGINT and SIGTERM are translated into quit interrupts */
  57         ohandler = signal(SIGINT,  SDL_HandleSIG);
  58         if ( ohandler != SIG_DFL )
  59                 signal(SIGINT, ohandler);
  60         ohandler = signal(SIGTERM, SDL_HandleSIG);
  61         if ( ohandler != SIG_DFL )
  62                 signal(SIGTERM, ohandler);
  63 #endif /* NO_SIGNAL_H */
  64 
  65         /* That's it! */
  66         return(0);
  67 }
  68 
  69 /* This function returns 1 if it's okay to close the application window */
  70 int SDL_PrivateQuit(void)
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  71 {
  72         int posted;
  73 
  74         posted = 0;
  75         if ( SDL_ProcessEvents[SDL_QUIT] == SDL_ENABLE ) {
  76                 SDL_Event event;
  77                 event.type = SDL_QUIT;
  78                 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
  79                         posted = 1;
  80                         SDL_PushEvent(&event);
  81                 }
  82         }
  83         return(posted);
  84 }

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