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  1. /*
  2.   Simple DirectMedia Layer
  3.   Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
  4.  
  5.   This software is provided 'as-is', without any express or implied
  6.   warranty.  In no event will the authors be held liable for any damages
  7.   arising from the use of this software.
  8.  
  9.   Permission is granted to anyone to use this software for any purpose,
  10.   including commercial applications, and to alter it and redistribute it
  11.   freely, subject to the following restrictions:
  12.  
  13.   1. The origin of this software must not be misrepresented; you must not
  14.      claim that you wrote the original software. If you use this software
  15.      in a product, an acknowledgment in the product documentation would be
  16.      appreciated but is not required.
  17.   2. Altered source versions must be plainly marked as such, and must not be
  18.      misrepresented as being the original software.
  19.   3. This notice may not be removed or altered from any source distribution.
  20. */
  21.  
  22. /**
  23.  *  \file SDL_quit.h
  24.  *
  25.  *  Include file for SDL quit event handling.
  26.  */
  27.  
  28. #ifndef SDL_quit_h_
  29. #define SDL_quit_h_
  30.  
  31. #include "SDL_stdinc.h"
  32. #include "SDL_error.h"
  33.  
  34. /**
  35.  *  \file SDL_quit.h
  36.  *
  37.  *  An ::SDL_QUIT event is generated when the user tries to close the application
  38.  *  window.  If it is ignored or filtered out, the window will remain open.
  39.  *  If it is not ignored or filtered, it is queued normally and the window
  40.  *  is allowed to close.  When the window is closed, screen updates will
  41.  *  complete, but have no effect.
  42.  *
  43.  *  SDL_Init() installs signal handlers for SIGINT (keyboard interrupt)
  44.  *  and SIGTERM (system termination request), if handlers do not already
  45.  *  exist, that generate ::SDL_QUIT events as well.  There is no way
  46.  *  to determine the cause of an ::SDL_QUIT event, but setting a signal
  47.  *  handler in your application will override the default generation of
  48.  *  quit events for that signal.
  49.  *
  50.  *  \sa SDL_Quit()
  51.  */
  52.  
  53. /* There are no functions directly affecting the quit event */
  54.  
  55. #define SDL_QuitRequested() \
  56.         (SDL_PumpEvents(), (SDL_PeepEvents(NULL,0,SDL_PEEKEVENT,SDL_QUIT,SDL_QUIT) > 0))
  57.  
  58. #endif /* SDL_quit_h_ */
  59.