symbian-qemu-0.9.1-12/libsdl-trunk/docs/html/sdldestroysemaphore.html
author Mike Kinghan <mikek@symbian.org>
Thu, 25 Nov 2010 14:28:39 +0000
branchGCC_SURGE
changeset 135 10852f1a0ae9
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Merge a pointless head that got away.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<HTML
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><HEAD
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><TITLE
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>SDL_DestroySemaphore</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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"><LINK
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REL="HOME"
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TITLE="SDL Library Documentation"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Multi-threaded Programming"
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HREF="thread.html"><LINK
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REL="PREVIOUS"
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TITLE="SDL_CreateSemaphore"
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HREF="sdlcreatesemaphore.html"><LINK
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REL="NEXT"
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TITLE="SDL_SemWait"
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HREF="sdlsemwait.html"></HEAD
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><BODY
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CLASS="REFENTRY"
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BGCOLOR="#FFF8DC"
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TEXT="#000000"
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LINK="#0000ee"
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VLINK="#551a8b"
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ALINK="#ff0000"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>SDL Library Documentation</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="sdlcreatesemaphore.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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></TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="sdlsemwait.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><H1
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><A
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NAME="SDLDESTROYSEMAPHORE"
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></A
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>SDL_DestroySemaphore</H1
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><DIV
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CLASS="REFNAMEDIV"
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><A
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NAME="AEN7982"
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></A
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><H2
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>Name</H2
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>SDL_DestroySemaphore&nbsp;--&nbsp;Destroys a semaphore that was created by <A
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HREF="sdlcreatesemaphore.html"
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>SDL_CreateSemaphore</A
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>.</DIV
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><DIV
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CLASS="REFSYNOPSISDIV"
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><A
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NAME="AEN7986"
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></A
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><H2
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>Synopsis</H2
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><DIV
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CLASS="FUNCSYNOPSIS"
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><A
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NAME="AEN7987"
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></A
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><P
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></P
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><PRE
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CLASS="FUNCSYNOPSISINFO"
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>#include "SDL.h"
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#include "SDL_thread.h"</PRE
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><P
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><CODE
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><CODE
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CLASS="FUNCDEF"
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>void <B
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CLASS="FSFUNC"
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>SDL_DestroySemaphore</B
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></CODE
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>(SDL_sem *sem);</CODE
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></P
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><P
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></P
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></DIV
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN7993"
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></A
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><H2
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>Description</H2
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martin.trojer@nokia.com
parents:
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><P
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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><TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CLASS="FUNCTION"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>SDL_DestroySemaphore</TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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> destroys the semaphore pointed to
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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by <TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CLASS="PARAMETER"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><I
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>sem</I
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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> that was created by
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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<A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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HREF="sdlcreatesemaphore.html"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CLASS="FUNCTION"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>SDL_CreateSemaphore</TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>.
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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It is not safe to destroy a semaphore if there are threads currently blocked
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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waiting on it.</P
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></DIV
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><DIV
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CLASS="REFSECT1"
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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NAME="AEN8000"
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></A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><H2
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Examples</H2
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><P
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><PRE
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CLASS="PROGRAMLISTING"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>if (my_sem != NULL) {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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        SDL_DestroySemaphore(my_sem);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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        my_sem = NULL;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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}</PRE
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></P
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></DIV
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><DIV
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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CLASS="REFSECT1"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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NAME="AEN8004"
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></A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><H2
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>See Also</H2
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><P
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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HREF="sdlcreatesemaphore.html"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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CLASS="FUNCTION"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>SDL_CreateSemaphore</TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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<A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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HREF="sdlsemwait.html"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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CLASS="FUNCTION"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>SDL_SemWait</TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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>,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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<A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   186
HREF="sdlsemtrywait.html"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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><TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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CLASS="FUNCTION"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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>SDL_SemTryWait</TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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></A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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>,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
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<A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   193
HREF="sdlsemwaittimeout.html"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   194
><TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   195
CLASS="FUNCTION"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   196
>SDL_SemWaitTimeout</TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   197
></A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   198
>,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   199
<A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   200
HREF="sdlsempost.html"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   201
><TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   202
CLASS="FUNCTION"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   203
>SDL_SemPost</TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   204
></A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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>,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   206
<A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   207
HREF="sdlsemvalue.html"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   208
><TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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CLASS="FUNCTION"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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>SDL_SemValue</TT
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></P
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></DIV
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><DIV
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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   215
CLASS="NAVFOOTER"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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><HR
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   217
ALIGN="LEFT"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   218
WIDTH="100%"><TABLE
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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SUMMARY="Footer navigation table"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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WIDTH="100%"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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   221
BORDER="0"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   222
CELLPADDING="0"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   223
CELLSPACING="0"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><TR
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><TD
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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WIDTH="33%"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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ALIGN="left"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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VALIGN="top"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   230
HREF="sdlcreatesemaphore.html"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   231
ACCESSKEY="P"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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>Prev</A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></TD
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><TD
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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WIDTH="34%"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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ALIGN="center"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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VALIGN="top"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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   239
HREF="index.html"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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ACCESSKEY="H"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Home</A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></TD
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><TD
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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WIDTH="33%"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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ALIGN="right"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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VALIGN="top"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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HREF="sdlsemwait.html"
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ACCESSKEY="N"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Next</A
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></TD
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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></TR
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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>SDL_CreateSemaphore</TD
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WIDTH="34%"
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><A
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HREF="thread.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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>SDL_SemWait</TD
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></TR
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>