Symbian3/PDK/Source/GUID-57DD8365-E60F-55C6-BB24-8D215A31A8AF.dita
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Fri, 22 Jan 2010 18:26:19 +0000
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permissions -rw-r--r--
Addition of the PDK content and example code for Documentation_content according to Feature bug 1607 and bug 1608
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
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<!-- This component and the accompanying materials are made available under the terms of the License 
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"Eclipse Public License v1.0" which accompanies this distribution, 
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
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<!-- Initial Contributors:
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    Nokia Corporation - initial contribution.
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Contributors: 
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-->
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<!DOCTYPE concept
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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
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<concept id="GUID-57DD8365-E60F-55C6-BB24-8D215A31A8AF" xml:lang="en"><title>How
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to track changes</title><shortdesc>This topic describes hoe to track changes made to file and free
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disk space.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
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<section id="GUID-DF41D2BE-1FD6-421F-9D07-49CCAC7AC288"><title>File changes</title> <p>To be notified whenever there is a
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change in the file system, use <xref href="GUID-E263C747-946F-35AA-9F1D-41833BD350FC.dita#GUID-E263C747-946F-35AA-9F1D-41833BD350FC/GUID-5F5D51B6-2643-3482-8C9F-71DF6C3355C4"><apiname>RFs::NotifyChange()</apiname></xref>. This
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is better than having to poll regularly. </p> <p>Use the <codeph>TOpenFileScan</codeph> class
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to find out which files are open, and the thread id of the program that has
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them open. This is useful for programs such as shells to be able to highlight
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files that are presently open. It is also useful for backup programs, which
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may need to close or suspend the owning program before doing a backup. </p> </section>
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<section id="GUID-754E8C5D-BE23-43D7-93BB-9B22B89E4241"><title>Free disk space changes</title> <p>Clients can use <xref href="GUID-E263C747-946F-35AA-9F1D-41833BD350FC.dita#GUID-E263C747-946F-35AA-9F1D-41833BD350FC/GUID-38A2D71A-DDB5-355D-863D-43802C67D51F"><apiname>RFs::NotifyDiskSpace()</apiname></xref> to
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ask that they be notified when free disk space on a drive crosses a client
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defined threshold value. This means that a client is notified if free disk
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space either increases above the threshold value or decreases below that value. </p> </section>
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</conbody></concept>