--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-BA89F4DF-E2F6-5E0B-BF20-F8898FC5D5F8.dita	Wed Mar 31 11:11:55 2010 +0100
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
+<!-- This component and the accompanying materials are made available under the terms of the License 
+"Eclipse Public License v1.0" which accompanies this distribution, 
+and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
+<!-- Initial Contributors:
+    Nokia Corporation - initial contribution.
+Contributors: 
+-->
+<!DOCTYPE concept
+  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
+<concept id="GUID-BA89F4DF-E2F6-5E0B-BF20-F8898FC5D5F8" xml:lang="en"><title>Mutexes
+Overview</title><shortdesc>This document provides an overview of mutexes.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+<section id="GUID-C50B1D56-F467-42DB-B010-1B37E5CC39EC"><title>Purpose</title> <p>Synchronises exclusive access to shared
+resources within and between processes.</p> </section>
+<section id="GUID-A4DD591F-A0D2-4FA5-9AFC-6D7DC76C9F2C"><title>Description</title> <p>Mutexes are typically used to serialise
+access to a section of re-entrant code that cannot be executed concurrently
+by more than one thread. A mutex object only allows one thread into a controlled
+section, forcing other threads which attempt to gain access to that section
+to wait until the first thread has exited from that section.</p> <p>A mutex
+can be used by threads across any number of processes. If a resource is only
+shared between the threads within the same process, it can be more efficient
+to use a critical section.</p> <p>Mutexes are Kernel objects and, as such,
+are managed by the Kernel, and accessed by user programs through handles. </p> <p>The
+mutex handle is provided by <xref href="GUID-C0FEA3A0-7DD3-3B87-A919-CB973BC05766.dita"><apiname>RMutex</apiname></xref>.</p> <p><xref href="GUID-A907C7B1-BD90-3E8F-AEA8-5A634BC98D0D.dita"><apiname>TFindMutex</apiname></xref> is
+used for finding a mutex created by another process.</p> </section>
+</conbody></concept>
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