1 <?xml version="1.0" encoding="utf-8"?>

     2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

     3 <!-- This component and the accompanying materials are made available under the terms of the License 

     4 "Eclipse Public License v1.0" which accompanies this distribution, 

     5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

     6 <!-- Initial Contributors:

     7     Nokia Corporation - initial contribution.

     8 Contributors: 

     9 -->

    10 <!DOCTYPE concept

    11   PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

    12 <concept id="GUID-DD568637-CD37-5E4C-AD78-4AA5AFE1E9D8" xml:lang="en"><title>Entry

    13 Point Implementation</title><shortdesc>Media driver must implement an entry point function that creates

    14 a PDD factory object that is derived from <codeph>DPhysicalDevice</codeph>.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

    15 <p>Because media drivers are implemented as kernel extensions, use the <xref href="GUID-F10BBEC9-FC49-3B85-9B7F-9A6DB66A7B30.dita"><apiname>DECLARE_EXTENSION_PDD()</apiname></xref> macro

    16 as a wrapper around the code that creates your factory object; the following

    17 code fragment is typical: </p>

    18 <codeblock id="GUID-BE6811EF-1FA7-58D2-89AC-12887B49DA5B" xml:space="preserve">DECLARE_EXTENSION_PDD()

    19     {

    20     return new DMyPhysicalDevice;

    21     } </codeblock>

    22 <p>where <codeph>DMyPhysicalDevice</codeph> is an implementation of <xref href="GUID-A5484A7F-94B9-34C7-9F88-82B1BF516930.dita"><apiname>DPhysicalDevice</apiname></xref>. </p>

    23 </conbody></concept>