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view docs/html/sdlsemvalue.html @ 4333:55717a755897 SDL-1.2

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Switched from setting the period size and count to setting the buffer size directly, based on feedback from the ALSA development list: http://mailman.alsa-project.org/pipermail/alsa-devel/2009-October/022267.html This has the nice side effect of reducing latency on my SBLive! card.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 13 Oct 2009 09:56:15 +0000
parents 355632dca928
children
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<HTML
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>SDL_SemValue</TITLE
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><H1
><A
NAME="SDLSEMVALUE"
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>SDL_SemValue</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN8218"
></A
><H2
>Name</H2
>SDL_SemValue&nbsp;--&nbsp;Return the current value of a semaphore.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN8221"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN8222"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"
#include "SDL/SDL_thread.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>Uint32 <B
CLASS="FSFUNC"
>SDL_SemValue</B
></CODE
>(SDL_sem *sem);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN8228"
></A
><H2
>Description</H2
><P
><TT
CLASS="FUNCTION"
>SDL_SemValue()</TT
> returns the current semaphore value from
the semaphore pointed to by <TT
CLASS="PARAMETER"
><I
>sem</I
></TT
>.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN8233"
></A
><H2
>Return Value</H2
><P
>Returns current value of the semaphore.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN8236"
></A
><H2
>Examples</H2
><P
><PRE
CLASS="PROGRAMLISTING"
>  sem_value = SDL_SemValue(my_sem);</PRE
></P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN8240"
></A
><H2
>See Also</H2
><P
><A
HREF="sdlcreatesemaphore.html"
><TT
CLASS="FUNCTION"
>SDL_CreateSemaphore</TT
></A
>,
<A
HREF="sdldestroysemaphore.html"
><TT
CLASS="FUNCTION"
>SDL_DestroySemaphore</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
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