Mercurial > sdl-ios-xcode
view docs/html/sdleventstate.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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<HTML ><HEAD ><TITLE >SDL_EventState</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="SDL Library Documentation" HREF="index.html"><LINK REL="UP" TITLE="Event Functions." HREF="eventfunctions.html"><LINK REL="PREVIOUS" TITLE="SDL_GetEventFilter" HREF="sdlgeteventfilter.html"><LINK REL="NEXT" TITLE="SDL_GetKeyState" HREF="sdlgetkeystate.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFF8DC" TEXT="#000000" LINK="#0000ee" VLINK="#551a8b" ALINK="#ff0000" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >SDL Library Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="sdlgeteventfilter.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdlgetkeystate.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLEVENTSTATE" ></A >SDL_EventState</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN5646" ></A ><H2 >Name</H2 >SDL_EventState -- This function allows you to set the state of processing certain events.</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN5649" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN5650" ></A ><P ></P ><PRE CLASS="FUNCSYNOPSISINFO" >#include "SDL.h"</PRE ><P ><CODE ><CODE CLASS="FUNCDEF" >Uint8 <B CLASS="FSFUNC" >SDL_EventState</B ></CODE >(Uint8 type, int state);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN5656" ></A ><H2 >Description</H2 ><P >This function allows you to set the state of processing certain event <TT CLASS="PARAMETER" ><I >type</I ></TT >'s.</P ><P >If <TT CLASS="PARAMETER" ><I >state</I ></TT > is set to <TT CLASS="LITERAL" >SDL_IGNORE</TT >, that event <TT CLASS="PARAMETER" ><I >type</I ></TT > will be automatically dropped from the event queue and will not be filtered.</P ><P >If <TT CLASS="PARAMETER" ><I >state</I ></TT > is set to <TT CLASS="LITERAL" >SDL_ENABLE</TT >, that event <TT CLASS="PARAMETER" ><I >type</I ></TT > will be processed normally.</P ><P >If <TT CLASS="PARAMETER" ><I >state</I ></TT > is set to <TT CLASS="LITERAL" >SDL_QUERY</TT >, <TT CLASS="FUNCTION" >SDL_EventState</TT > will return the current processing state of the specified event <TT CLASS="PARAMETER" ><I >type</I ></TT >.</P ><P >A list of event <TT CLASS="PARAMETER" ><I >type</I ></TT >'s can be found in the <A HREF="sdlevent.html" ><SPAN CLASS="STRUCTNAME" >SDL_Event</SPAN ></A > section.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN5677" ></A ><H2 >See Also</H2 ><P ><A HREF="sdlevent.html" ><SPAN CLASS="STRUCTNAME" >SDL_Event</SPAN ></A ></P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sdlgeteventfilter.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sdlgetkeystate.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_GetEventFilter</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="eventfunctions.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL_GetKeyState</TD ></TR ></TABLE ></DIV ></BODY ></HTML >