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Symbian3/SDK/Source/GUID-092C18D4-A525-5562-9BF6-41435E400290.dita
author Dominic Pinkman <dominic.pinkman@nokia.com>
Tue, 20 Jul 2010 12:00:49 +0100
changeset 13 48780e181b38
parent 8 ae94777fff8f
permissions -rw-r--r--
Week 28 contribution of SDK documentation content. See release notes for details. Fixes bugs Bug 1897 and Bug 1522.
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ae94777fff8f Week 23 contribution of SDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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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
ae94777fff8f Week 23 contribution of SDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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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-092C18D4-A525-5562-9BF6-41435E400290" xml:lang="en"><title>LibpThread Example - Using P.I.P.S OECORE </title><prolog><metadata><keywords/></metadata></prolog><conbody>
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<p>This example application shows, using a P.I.P.S. (P.I.P.S. Is POSIX
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on the Symbian platform) program, the use of the LibpThread library
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to demonstrate simple multi-threading and synchronisation. </p>
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<p>The purpose is to create a basic multithreading example showing
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the usage of the LibpThread APIs. This example also shows how multi-threading
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is used to achieve concurrency in tasks and sharing of resources. </p>
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<section id="GUID-026FD8D6-6C4A-5958-B289-775D4AE1E756-GENID-1-10-1-13-1-1-5-1-3-1-11-1-7-1-2-3"><title>Download</title> <p>Click on the following link to download the example: <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/zips/guid-84e8baf2-57f1-4255-aeb8-a6ed0ed2145e.zip" scope="external"> LibpThreadExample.zip</xref></p><p>Click: <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/guid-84e8baf2-57f1-4255-aeb8-a6ed0ed2145e.html" scope="peer">browse</xref> to view the example code. </p> </section>
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<section id="GUID-7E7C4564-B10E-41F9-8A9D-D8A6C5E9C51C-GENID-1-10-1-13-1-1-5-1-3-1-11-1-7-1-2-4"><title>Description</title> <p>The following sections provide more information about the steps
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that the example performs. </p> <p><b> Thread Synchronisation</b> </p> <p>The example creates three threads named ThreadOne, ThreadTwo
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and ThreadThree. The threads write "One", "Two" and "Three" five times
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in a text file. The text file, located in <filepath>epoc32\winscw\c\newfile.txt</filepath>, is used as a shared resource for all three threads. A mutex is
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used to ensure that first ThreadOne writes in the file, then ThreadTwo
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and then ThreadThree. If the mutex is not used all the threads can
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simultaneously write in the file. This can be seen by commenting out <codeph>pthread_mutex_lock</codeph> and <codeph>pthread_mutex_unlock</codeph> in the code. </p> </section>
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<section id="GUID-236CB272-E196-4A61-B627-ACFFC4B37AA1"><title>Related
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APIs</title><p><xref href="GUID-94FEEC14-384E-364F-929F-0339FE559FB0.dita"><apiname>pthread_mutex_lock(pthread_mutex_t *)</apiname></xref> </p><p><xref href="GUID-E0AABD52-5A8F-3F49-A46D-5CE5BE975765.dita"><apiname>pthread_mutex_unlock(pthread_mutex_t *)</apiname></xref> </p><p><xref href="GUID-23868643-4C61-3661-843B-2D67C54CF163.dita"><apiname>pthread_join(pthread_t,void **)</apiname></xref></p><p><xref href="GUID-889CB456-6980-3B92-9350-0C6C8C9AC435.dita"><apiname>pthread_mutex_t</apiname></xref></p></section>
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<section id="GUID-67A72761-1D92-46D1-B1C9-7455978BDE4E-GENID-1-10-1-13-1-1-5-1-3-1-11-1-7-1-2-6"><title>Build</title> <p>The Symbian build process describes how to build this example
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application. </p> <p>The example builds an executable
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called <filepath>LibpThreadExample.exe</filepath> in the standard
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locations. </p> <p>To run the example, start <filepath>LibpThreadExample.exe</filepath> from the file system or from your IDE. After launching the executable,
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depending on the emulator you are using, you may need to navigate
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away from the application launcher or shell screen to view the console. </p> </section>
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51a74ef9ed63 Week 12 contribution of API Specs and fix SDK submission
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</conbody></concept>
MCL/sftools/depl/docscontent