/
sdldestroysemaphore.html
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/
sdldestroysemaphore.html
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<HTML
><HEAD
><TITLE
>SDL_DestroySemaphore</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.61
"><LINK
REL="HOME"
TITLE="SDL Library Documentation"
HREF="index.html"><LINK
REL="UP"
TITLE="Multi-threaded Programming"
HREF="thread.html"><LINK
REL="PREVIOUS"
TITLE="SDL_CreateSemaphore"
HREF="sdlcreatesemaphore.html"><LINK
REL="NEXT"
TITLE="SDL_SemWait"
HREF="sdlsemwait.html"></HEAD
><BODY
CLASS="REFENTRY"
BGCOLOR="#FFF8DC"
TEXT="#000000"
LINK="#0000ee"
VLINK="#551a8b"
ALINK="#ff0000"
><DIV
CLASS="NAVHEADER"
><TABLE
WIDTH="100%"
BORDER="0"
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><TH
COLSPAN="3"
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>SDL Library Documentation</TH
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><TR
><TD
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><A
HREF="sdlcreatesemaphore.html"
>Prev</A
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><HR
ALIGN="LEFT"
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><H1
><A
NAME="SDLDESTROYSEMAPHORE"
>SDL_DestroySemaphore</A
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN7357"
></A
><H2
>Name</H2
>SDL_DestroySemaphore -- Destroys a semaphore that was created by <A
HREF="sdlcreatesemaphore.html"
>SDL_CreateSemaphore</A
>.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN7361"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN7362"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"
#include "SDL_thread.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>void <B
CLASS="FSFUNC"
>SDL_DestroySemaphore</B
></CODE
>(SDL_sem *sem);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN7368"
></A
><H2
>Description</H2
><P
><TT
CLASS="FUNCTION"
>SDL_DestroySemaphore</TT
> destroys the semaphore pointed to
by <TT
CLASS="PARAMETER"
><I
>sem</I
></TT
> that was created by
<A
HREF="sdlcreatesemaphore.html"
><TT
CLASS="FUNCTION"
>SDL_CreateSemaphore</TT
></A
>.
It is not safe to destroy a semaphore if there are threads currently blocked
waiting on it.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN7375"
></A
><H2
>Examples</H2
><P
><PRE
CLASS="PROGRAMLISTING"
>if (my_sem != NULL) {
SDL_DestroySemaphore(my_sem);
my_sem = NULL;
}</PRE
></P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN7379"
></A
><H2
>See Also</H2
><P
><A
HREF="sdlcreatesemaphore.html"
><TT
CLASS="FUNCTION"
>SDL_CreateSemaphore</TT
></A
>,
<A
HREF="sdlsemwait.html"
><TT
CLASS="FUNCTION"
>SDL_SemWait</TT
></A
>,
<A
HREF="sdlsemtrywait.html"
><TT
CLASS="FUNCTION"
>SDL_SemTryWait</TT
></A
>,
<A
HREF="sdlsemwaittimeout.html"
><TT
CLASS="FUNCTION"
>SDL_SemWaitTimeout</TT
></A
>,
<A
HREF="sdlsempost.html"
><TT
CLASS="FUNCTION"
>SDL_SemPost</TT
></A
>,
<A
HREF="sdlsemvalue.html"
><TT
CLASS="FUNCTION"
>SDL_SemValue</TT
></A
></P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="sdlcreatesemaphore.html"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="sdlsemwait.html"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>SDL_CreateSemaphore</TD
><TD
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VALIGN="top"
><A
HREF="thread.html"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
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>SDL_SemWait</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>