Symbian3/SDK/Source/GUID-FF312AAD-E40B-5238-A31C-B34AFD892D5A.dita
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Thu, 21 Jan 2010 18:18:20 +0000
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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-FF312AAD-E40B-5238-A31C-B34AFD892D5A" xml:lang="en"><title>Static
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interface DLLs</title><prolog><metadata><keywords/></metadata></prolog><conbody>
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<p>A static interface DLL represents an interface which is defined to its
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clients by one or more headers for use at compile time, and an import library
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for use at link time. </p>
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<p>When a executable that is a client of the DLL is loaded at run-time, the
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loader notes that it requires the static interface DLL to be available. The
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loader then either loads the DLL or, if it is loaded already, attaches the
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new client to it. </p>
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<p>In Symbian platform, all static interface DLLs must have a <codeph>uid2</codeph> of <codeph>0x1000008d</codeph>.
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The particular static interface DLL is then identified by name and by <codeph>uid3</codeph>. </p>
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<p>For example, if a DLL called <filepath>helloview.dll</filepath> is built
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with a <codeph>uid3</codeph> of 0x10000252, then the name used in the import
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library for ARM builds of Symbian platform is <filepath>helloview[10000252]</filepath>.
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When the loader loads the <filepath>helloview.dll</filepath>, it checks that
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its UID is <codeph>0x10000252</codeph>. If the <codeph>uid3</codeph> in the
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DLL does not match, then the load fails. </p>
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<section><title>mmp project specification</title><p>A static interface DLL
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project file must specify the correct target type and UID:</p><ul>
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<li id="GUID-EBD5092A-1F8F-5715-AFB4-A8183263028C"><p>Specify the <codeph>TARGETTYPE</codeph> line
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as: </p> <codeblock id="GUID-0BF51E79-4F88-58FC-9608-C57F1C8F6FF0" xml:space="preserve">TARGETTYPE dll</codeblock> <p>This
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implicitly specifies <codeph>UID1</codeph> correctly. </p> </li>
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<li id="GUID-2FB86A73-A3D3-5289-B5C3-5D3CE68EE68C"><p>Specify the UID for
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the DLL in a <codeph>UID</codeph> line: </p> <p><userinput>UID 0x1000008d
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&lt;UID3&gt;</userinput> </p> </li>
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</ul> </section>
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<example><p>An example of the <filepath>mmp</filepath> project file for a
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static DLL is given below: </p><codeblock id="GUID-0690A3DC-3FF4-5FA1-9532-7ED2A0E65C1B" xml:space="preserve">TARGET        CreateStaticDLL.dll
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TARGETTYPE    dll
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UID           0x1000008d 0x10004268
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SOURCEPATH    .
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SOURCE        CreateStaticDLL.cpp
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USERINCLUDE   .
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SYSTEMINCLUDE \Epoc32\include
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LIBRARY       euser.lib
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EXPORTUNFROZEN</codeblock></example>
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</conbody></concept>