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  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. /* General quit handling code for SDL */
  24.  
  25. #include <stdio.h>
  26. #ifndef NO_SIGNAL_H
  27. #include <signal.h>
  28. #endif
  29.  
  30. #include "SDL_events.h"
  31. #include "SDL_events_c.h"
  32.  
  33.  
  34. #ifndef NO_SIGNAL_H
  35. static void SDL_HandleSIG(int sig)
  36. {
  37.         /* Reset the signal handler */
  38.         signal(sig, SDL_HandleSIG);
  39.  
  40.         /* Signal a quit interrupt */
  41.         SDL_PrivateQuit();
  42. }
  43. #endif /* NO_SIGNAL_H */
  44.  
  45. /* Public functions */
  46. int SDL_QuitInit(void)
  47. {
  48. #ifndef NO_SIGNAL_H
  49.         void (*ohandler)(int);
  50.  
  51.         /* Both SIGINT and SIGTERM are translated into quit interrupts */
  52.         ohandler = signal(SIGINT,  SDL_HandleSIG);
  53.         if ( ohandler != SIG_DFL )
  54.                 signal(SIGINT, ohandler);
  55.         ohandler = signal(SIGTERM, SDL_HandleSIG);
  56.         if ( ohandler != SIG_DFL )
  57.                 signal(SIGTERM, ohandler);
  58. #endif /* NO_SIGNAL_H */
  59.  
  60.         /* That's it! */
  61.         return(0);
  62. }
  63.  
  64. /* This function returns 1 if it's okay to close the application window */
  65. int SDL_PrivateQuit(void)
  66. {
  67.         int posted;
  68.  
  69.         posted = 0;
  70.         if ( SDL_ProcessEvents[SDL_QUIT] == SDL_ENABLE ) {
  71.                 SDL_Event event;
  72.                 event.type = SDL_QUIT;
  73.                 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
  74.                         posted = 1;
  75.                         SDL_PushEvent(&event);
  76.                 }
  77.         }
  78.         return(posted);
  79. }
  80.