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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/publishstd_8cpp_source.html
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Tue, 30 Mar 2010 16:16:55 +0100
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>TB9.2 Example Applications: examples/Base/IPC/pubsub/publishstd.cpp Source File</title>
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<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<link href="doxygen.css" rel="stylesheet" type="text/css"/>
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</head>
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<body>
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<!-- Generated by Doxygen 1.6.2 -->
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<h1>examples/Base/IPC/pubsub/publishstd.cpp</h1><a href="publishstd_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).</span>
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<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
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<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
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<a name="l00004"></a>00004 <span class="comment">// under the terms of &quot;Eclipse Public License v1.0&quot;</span>
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<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
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<a name="l00006"></a>00006 <span class="comment">// at the URL &quot;http://www.eclipse.org/legal/epl-v10.html&quot;.</span>
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<a name="l00007"></a>00007 <span class="comment">//</span>
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<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
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<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
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<a name="l00010"></a>00010 <span class="comment">//</span>
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<a name="l00011"></a>00011 <span class="comment">// Contributors:</span>
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<a name="l00012"></a>00012 <span class="comment">//</span>
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<a name="l00013"></a>00013 <span class="comment">// Description:</span>
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<a name="l00014"></a>00014 <span class="comment">// Demonstrates standard state pattern of publishing a byte-array property</span>
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<a name="l00015"></a>00015 <span class="comment">//</span>
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<a name="l00016"></a>00016
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<a name="l00017"></a>00017
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<a name="l00018"></a>00018
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<a name="l00023"></a>00023 <span class="preprocessor">#include &quot;<a class="code" href="publish_8h.html">publish.h</a>&quot;</span>
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<a name="l00024"></a>00024
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<a name="l00025"></a>00025 LOCAL_D CConsoleBase* console;
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<a name="l00026"></a>00026
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<a name="l00032"></a><a class="code" href="publishstd_8cpp.html#ae3dba9d5ec6d59791d61680c67729f0e">00032</a> <span class="keywordtype">void</span> <a class="code" href="publish_8h.html#ae3dba9d5ec6d59791d61680c67729f0e">PublishL</a>(RProperty&amp; aProperty,TDes16&amp; aBuf)
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<a name="l00033"></a>00033         {
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<a name="l00034"></a>00034         console-&gt;Printf(KTxtPublish);
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<a name="l00035"></a>00035
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<a name="l00036"></a>00036         <span class="comment">// Publish the property</span>
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<a name="l00037"></a>00037         <span class="comment">// Failure to publish values in standard state publishing pattern is treated as a serious error</span>
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<a name="l00038"></a>00038         User::LeaveIfError(aProperty.Set(aBuf));
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<a name="l00039"></a>00039         console-&gt;Printf(KTxtArray);
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<a name="l00040"></a>00040
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<a name="l00041"></a>00041         <span class="comment">// Print the value of the byte-array</span>
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<a name="l00042"></a>00042         TInt bufLength = aBuf.Length();
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<a name="l00043"></a>00043         <span class="keywordflow">for</span>(TInt ix = 0; ix &lt; bufLength; ix++)
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<a name="l00044"></a>00044                 {
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<a name="l00045"></a>00045                 console-&gt;Printf(KTxtArrayElement,aBuf[ix]);
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<a name="l00046"></a>00046                 }
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<a name="l00047"></a>00047         console-&gt;Printf(KTxtNewLine);
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<a name="l00048"></a>00048         }
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<a name="l00049"></a>00049
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<a name="l00050"></a>00050 <span class="keywordtype">void</span> DoExampleL()
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<a name="l00051"></a>00051         {
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<a name="l00052"></a>00052         console-&gt;Printf(KTxtStPublish);
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<a name="l00053"></a>00053         console-&gt;Printf(KTxtDefine);
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<a name="l00054"></a>00054
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<a name="l00055"></a>00055         <span class="comment">// Define and pre-allocate memory to the byte-array property</span>
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<a name="l00056"></a>00056         RProperty::Define(KMyPropertyCat, KMyPropertyName,RProperty::EByteArray,KAllowAllPolicy,KAllowAllPolicy,KArraySize);
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<a name="l00057"></a>00057         RProperty myProperty;
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<a name="l00058"></a>00058         <span class="comment">// Create a handle to the property</span>
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<a name="l00059"></a>00059         User::LeaveIfError(myProperty.Attach(KMyPropertyCat,KMyPropertyName,EOwnerThread));
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<a name="l00060"></a>00060         console-&gt;Printf(KTxtCreateHandle);
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<a name="l00061"></a>00061
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<a name="l00062"></a>00062         <span class="comment">// Byte-Array property value to be published</span>
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<a name="l00063"></a>00063         TUint16 array[KArraySize] = {10,20,30,40};
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<a name="l00064"></a>00064
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<a name="l00065"></a>00065         <span class="comment">// Descriptor that the array contents are copied into</span>
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<a name="l00066"></a>00066         TBuf16&lt;KBufSize&gt; buf;
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<a name="l00067"></a>00067
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<a name="l00068"></a>00068         <span class="comment">// Copy array contents into the descriptor</span>
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<a name="l00069"></a>00069         buf.Copy(&amp;array[0],<span class="keyword">sizeof</span>(array));
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<a name="l00070"></a>00070         buf.SetLength(KArraySize);
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<a name="l00071"></a>00071
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<a name="l00072"></a>00072         <span class="comment">// Publish the property</span>
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<a name="l00073"></a>00073         <a class="code" href="publish_8h.html#ae3dba9d5ec6d59791d61680c67729f0e">PublishL</a>(myProperty,buf);
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<a name="l00074"></a>00074
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<a name="l00075"></a>00075         <span class="comment">// Change the array contents</span>
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<a name="l00076"></a>00076         array[0] = 0x00ab;
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<a name="l00077"></a>00077         array[1] = 0x00bc;
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<a name="l00078"></a>00078         array[2] = 0x00cd;
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<a name="l00079"></a>00079         array[3] = 0x00de;
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<a name="l00080"></a>00080         array[4] = 0x00ef;
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<a name="l00081"></a>00081         array[5] = 0x00fa;
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<a name="l00082"></a>00082
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<a name="l00083"></a>00083         buf.Copy(&amp;array[0],<span class="keyword">sizeof</span>(array));
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<a name="l00084"></a>00084         <span class="comment">// Copy array contents into the descriptor</span>
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<a name="l00085"></a>00085         buf.SetLength(KArraySize);
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<a name="l00086"></a>00086
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<a name="l00087"></a>00087         <span class="comment">// Wait for a key press</span>
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<a name="l00088"></a>00088         console-&gt;Printf(KTxtEnter);
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<a name="l00089"></a>00089         <span class="keywordflow">while</span>(console-&gt;Getch()!= EKeyEnter)
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<a name="l00090"></a>00090                 {
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<a name="l00091"></a>00091                 console-&gt;Printf(KTxtEnter);
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<a name="l00092"></a>00092                 }
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<a name="l00093"></a>00093
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<a name="l00094"></a>00094         <span class="comment">// Publish the property</span>
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<a name="l00095"></a>00095         <a class="code" href="publish_8h.html#ae3dba9d5ec6d59791d61680c67729f0e">PublishL</a>(myProperty,buf);
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<a name="l00096"></a>00096
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<a name="l00097"></a>00097         <span class="comment">// Indicate the publisher will not publish any more values</span>
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<a name="l00098"></a>00098         <span class="comment">// The subscriber stops its subscription to the property when this value is published</span>
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<a name="l00099"></a>00099         buf.Copy(KStop);
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<a name="l00100"></a>00100         console-&gt;Printf(KTxtEnter);
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<a name="l00101"></a>00101
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<a name="l00102"></a>00102         <span class="comment">// Wait for a key press</span>
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<a name="l00103"></a>00103         <span class="keywordflow">while</span>(console-&gt;Getch()!= EKeyEnter)
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<a name="l00104"></a>00104                 {
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<a name="l00105"></a>00105                 console-&gt;Printf(KTxtEnter);
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<a name="l00106"></a>00106                 }
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<a name="l00107"></a>00107
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<a name="l00108"></a>00108         <span class="comment">// Publish the property</span>
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<a name="l00109"></a>00109         <a class="code" href="publish_8h.html#ae3dba9d5ec6d59791d61680c67729f0e">PublishL</a>(myProperty,buf);
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<a name="l00110"></a>00110
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<a name="l00111"></a>00111         <span class="comment">// Close the handle to the property</span>
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<a name="l00112"></a>00112
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<a name="l00113"></a>00113         myProperty.Close();
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<a name="l00114"></a>00114
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<a name="l00115"></a>00115         <span class="comment">// Wait for a key press</span>
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<a name="l00116"></a>00116         <span class="keywordflow">while</span>(console-&gt;Getch()!= EKeyEnter)
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<a name="l00117"></a>00117                 {
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<a name="l00118"></a>00118                 console-&gt;Printf(KTxtEnter);
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<a name="l00119"></a>00119                 }
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<a name="l00120"></a>00120
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<a name="l00121"></a>00121         <span class="comment">// The publisher has finished so delete the property</span>
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<a name="l00122"></a>00122         User::LeaveIfError(RProperty::Delete(KMyPropertyCat, KMyPropertyName));
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<a name="l00123"></a>00123         }
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<a name="l00124"></a>00124
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<a name="l00125"></a><a class="code" href="publishstd_8cpp.html#a0f358e9c4355138f629b8c4f37310295">00125</a> GLDEF_C TInt E32Main()
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<a name="l00126"></a>00126         {
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<a name="l00127"></a>00127         __UHEAP_MARK;
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<a name="l00128"></a>00128         CTrapCleanup* cleanup = CTrapCleanup::New();
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<a name="l00129"></a>00129
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<a name="l00130"></a>00130         TRAPD(createError, console = Console::NewL(KTextConsoleTitle, TSize(KConsFullScreen,KConsFullScreen)));
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<a name="l00131"></a>00131         <span class="keywordflow">if</span> (createError)
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<a name="l00132"></a>00132                 <span class="keywordflow">return</span> createError;
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<a name="l00133"></a>00133
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<a name="l00134"></a>00134         TRAPD(mainError, DoExampleL());
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<a name="l00135"></a>00135         <span class="keywordflow">if</span> (mainError)
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<a name="l00136"></a>00136                 console-&gt;Printf(KTextFailed, mainError);
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<a name="l00137"></a>00137         console-&gt;Printf(KTextPressAnyKey);
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<a name="l00138"></a>00138         console-&gt;Getch();
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<a name="l00139"></a>00139
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<a name="l00140"></a>00140         <span class="keyword">delete</span> console;
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<a name="l00141"></a>00141         <span class="keyword">delete</span> cleanup;
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<a name="l00142"></a>00142         __UHEAP_MARKEND;
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<a name="l00143"></a>00143         <span class="keywordflow">return</span> KErrNone;
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<a name="l00144"></a>00144         }
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</pre></div></div>
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<hr size="1"/><address style="text-align: right;"><small>Generated by&nbsp;
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
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</body>
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</html>
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