view docs/html/sdlquitevent.html @ 4355:9b464226e541 SDL-1.2

Fixed bug #855 Ludwig Nussel 2009-10-18 06:31:52 PDT an mprotect call was added to fix bug 528. However that results in a buffer that allows writing and code execution. Ie the no-execute security features of modern operating systems are defeated this way. Two mprotect calls are needed. One to make the buffer executable but not writeable when done and another one to make the buffer writeable again if the content needs to be changed.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 18 Oct 2009 17:31:37 +0000
parents 355632dca928
children
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>SDL_QuitEvent</H1
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><H2
>Name</H2
>SDL_QuitEvent&nbsp;--&nbsp;Quit requested event</DIV
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><H2
>Structure Definition</H2
><PRE
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>typedef struct{
  Uint8 type
} SDL_QuitEvent;</PRE
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>Structure Data</H2
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><TT
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><TT
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>SDL_QUIT</TT
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><H2
>Description</H2
><P
><SPAN
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>SDL_QuitEvent</SPAN
> is a member of the <A
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>SDL_Event</SPAN
></A
> union and is used whan an event of type <TT
CLASS="LITERAL"
>SDL_QUIT</TT
> is reported.</P
><P
>As can be seen, the SDL_QuitEvent structure serves no useful purpose. The event itself, on the other hand, is very important. If you filter out or ignore a quit event then it is impossible for the user to close the window. On the other hand, if you do accept a quit event then the application window will be closed, and screen updates will still report success event though the application will no longer be visible.</P
><DIV
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><B
>Note: </B
>The macro <TT
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>SDL_QuitRequested</TT
> will return non-zero if a quit event is pending</P
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>See Also</H2
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