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view docs/html/sdldestroysemaphore.html @ 3880:74e828c64315 SDL-1.2

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Fixed bug #292 I might be on crack here. It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and right channels of a stereo stream together, and clamps the new mono channel if it would overflow. Shouldn't it be dividing by 2 to average the two sample points instead of clamping? Otherwise the mono sample point's volume doubles in the conversion. This would also make the conversion faster, as it replaces two branches per sample frame with a bitwise shift. --ryan.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 24 Sep 2006 15:45:37 +0000
parents 355632dca928
children
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<HTML
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>SDL_DestroySemaphore</TITLE
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>SDL_DestroySemaphore</H1
><DIV
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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
><DIV
CLASS="REFSYNOPSISDIV"
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><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
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><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="AEN7993"
></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
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><A
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><H2
>Examples</H2
><P
><PRE
CLASS="PROGRAMLISTING"
>if (my_sem != NULL) {
        SDL_DestroySemaphore(my_sem);
        my_sem = NULL;
}</PRE
></P
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>See Also</H2
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><TT
CLASS="FUNCTION"
>SDL_CreateSemaphore</TT
></A
>,
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HREF="sdlsemwait.html"
><TT
CLASS="FUNCTION"
>SDL_SemWait</TT
></A
>,
<A
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><TT
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>SDL_SemTryWait</TT
></A
>,
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>SDL_SemWaitTimeout</TT
></A
>,
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>SDL_SemPost</TT
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