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><H1
><A
NAME="SDLDESTROYSEMAPHORE"
>SDL_DestroySemaphore</A
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><H2
>Name</H2
>SDL_DestroySemaphore&nbsp;--&nbsp;Destroys a semaphore that was created by <A
HREF="sdlcreatesemaphore.html"
>SDL_CreateSemaphore</A
>.</DIV
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>Synopsis</H2
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><PRE
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>#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
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><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
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><H2
>Examples</H2
><P
><PRE
CLASS="PROGRAMLISTING"
>if (my_sem != NULL) {
        SDL_DestroySemaphore(my_sem);
        my_sem = NULL;
}</PRE
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>See Also</H2
><P
><A
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><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
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><TT
CLASS="FUNCTION"
>SDL_SemPost</TT
></A
>,
<A
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><TT
CLASS="FUNCTION"
>SDL_SemValue</TT
></A
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author	Sam Lantinga <slouken@libsdl.org>
date	Mon, 20 Jan 2003 00:25:28 +0000
parents	e5bc29de3f0a
children	355632dca928