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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
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><TITLE
>SDL_JoyHatEvent</TITLE
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><HR
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><H1
><A
NAME="SDLJOYHATEVENT"
></A
>SDL_JoyHatEvent</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN4320"
></A
><H2
>Name</H2
>SDL_JoyHatEvent&nbsp;--&nbsp;Joystick hat position change event structure</DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4323"
></A
><H2
>Structure Definition</H2
><PRE
CLASS="PROGRAMLISTING"
>typedef struct{
  Uint8 type;
  Uint8 which;
  Uint8 hat;
  Uint8 value;
} SDL_JoyHatEvent;</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4326"
></A
><H2
>Structure Data</H2
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN4328"
></A
><P
></P
><TABLE
BORDER="0"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="STRUCTFIELD"
><I
>type</I
></TT
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="LITERAL"
>SDL_JOY</TT
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="STRUCTFIELD"
><I
>which</I
></TT
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Joystick device index</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="STRUCTFIELD"
><I
>hat</I
></TT
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Joystick hat index</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="STRUCTFIELD"
><I
>value</I
></TT
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Hat position</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4348"
></A
><H2
>Description</H2
><P
><SPAN
CLASS="STRUCTNAME"
>SDL_JoyHatEvent</SPAN
> is a member of the <A
HREF="sdlevent.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_Event</SPAN
></A
> union and is used when an event of type <TT
CLASS="LITERAL"
>SDL_JOYHATMOTION</TT
> is reported.</P
><P
>A <TT
CLASS="LITERAL"
>SDL_JOYHATMOTION</TT
> event occurs when ever a user moves a hat on the joystick. The field <TT
CLASS="STRUCTFIELD"
><I
>which</I
></TT
> is the index of the joystick that reported the event and <TT
CLASS="STRUCTFIELD"
><I
>hat</I
></TT
> is the index of the hat (for a more detailed exlaination see the <A
HREF="joystick.html"
>Joystick section</A
>). <TT
CLASS="STRUCTFIELD"
><I
>value</I
></TT
> is the current position of the hat. It is a logically OR'd combination of the following values (whose meanings should be pretty obvious:) :</P
><P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><TT
CLASS="LITERAL"
>SDL_HAT_CENTERED</TT
></TD
></TR
><TR
><TD
><TT
CLASS="LITERAL"
>SDL_HAT_UP</TT
></TD
></TR
><TR
><TD
><TT
CLASS="LITERAL"
>SDL_HAT_RIGHT</TT
></TD
></TR
><TR
><TD
><TT
CLASS="LITERAL"
>SDL_HAT_DOWN</TT
></TD
></TR
><TR
><TD
><TT
CLASS="LITERAL"
>SDL_HAT_LEFT</TT
></TD
></TR
></TBODY
></TABLE
><P
></P
><P
>The following defines are also provided:</P
><P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><TT
CLASS="LITERAL"
>SDL_HAT_RIGHTUP</TT
></TD
></TR
><TR
><TD
><TT
CLASS="LITERAL"
>SDL_HAT_RIGHTDOWN</TT
></TD
></TR
><TR
><TD
><TT
CLASS="LITERAL"
>SDL_HAT_LEFTUP</TT
></TD
></TR
><TR
><TD
><TT
CLASS="LITERAL"
>SDL_HAT_LEFTDOWN</TT
></TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4382"
></A
><H2
>See Also</H2
><P
><A
HREF="sdlevent.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_Event</SPAN
></A
>,
<A
HREF="joystick.html"
>Joystick Functions</A
>,
<A
HREF="sdljoystickeventstate.html"
><TT
CLASS="FUNCTION"
>SDL_JoystickEventState</TT
></A
>,
<A
HREF="sdljoystickgetball.html"
><TT
CLASS="FUNCTION"
>SDL_JoystickGetHat</TT
></A
></P
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