Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_utilities_8cpp_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 13 Aug 2010 16:47:46 +0100
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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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/MemMan/Cleanup/Utilities/Utilities.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/MemMan/Cleanup/Utilities/Utilities.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2000-2009 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">//</span>
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<a name="l00015"></a>00015 
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<a name="l00016"></a>00016 <span class="preprocessor">#include &quot;CommonFramework.h&quot;</span>
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<a name="l00017"></a>00017 
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<a name="l00018"></a>00018 <span class="comment">//</span>
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<a name="l00019"></a>00019 <span class="comment">// Definition of the CTestOne class</span>
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<a name="l00020"></a>00020 <span class="comment">//</span>
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<a name="l00021"></a>00021 <span class="keyword">class </span>CTestOne : <span class="keyword">public</span> CBase
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<a name="l00022"></a>00022         {       
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<a name="l00023"></a>00023 <span class="keyword">public</span>:
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<a name="l00024"></a>00024         ~CTestOne();
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<a name="l00025"></a>00025         <span class="keywordtype">void</span>     SetTextL(<span class="keyword">const</span> TDesC&amp; aData);
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<a name="l00026"></a>00026 <span class="keyword">private</span> :
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<a name="l00027"></a>00027         HBufC*   iText;
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<a name="l00028"></a>00028         };
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<a name="l00029"></a>00029 
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<a name="l00030"></a>00030 
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<a name="l00031"></a>00031 <span class="comment">//</span>
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<a name="l00032"></a>00032 <span class="comment">// Implementation of the CTestOne class</span>
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<a name="l00033"></a>00033 <span class="comment">//</span>
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<a name="l00034"></a>00034 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtInsideDestructor,<span class="stringliteral">&quot;Executing the CTestOne destructor\n&quot;</span>);
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<a name="l00035"></a>00035 CTestOne::~CTestOne()
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<a name="l00036"></a>00036         {
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<a name="l00037"></a>00037         <span class="keyword">delete</span> iText;
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<a name="l00038"></a>00038         console-&gt;Printf(KTxtInsideDestructor);
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<a name="l00039"></a>00039         }
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<a name="l00040"></a>00040 
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<a name="l00041"></a>00041 <span class="keywordtype">void</span> CTestOne::SetTextL(<span class="keyword">const</span> TDesC&amp; aData)
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<a name="l00042"></a>00042         {
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<a name="l00043"></a>00043         <span class="keywordflow">if</span> (iText)
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<a name="l00044"></a>00044                 {
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<a name="l00045"></a>00045                 <span class="keyword">delete</span> iText;
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<a name="l00046"></a>00046                 iText = NULL;
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<a name="l00047"></a>00047                 }
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<a name="l00048"></a>00048         iText = aData.AllocL(); 
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<a name="l00049"></a>00049         }
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<a name="l00050"></a>00050 
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<a name="l00051"></a>00051 
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<a name="l00052"></a>00052 
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<a name="l00053"></a>00053 <span class="comment">//</span>
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<a name="l00054"></a>00054 <span class="comment">// Definition of the RTestTwo class</span>
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<a name="l00055"></a>00055 <span class="comment">//</span>
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<a name="l00056"></a>00056 <span class="keyword">class </span>RTestTwo
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<a name="l00057"></a>00057         {       
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<a name="l00058"></a>00058 <span class="keyword">public</span>:
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<a name="l00059"></a>00059         RTestTwo(TInt aValue);
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<a name="l00060"></a>00060         <span class="keywordtype">void</span>     Close();
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<a name="l00061"></a>00061 <span class="keyword">private</span> :
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<a name="l00062"></a>00062         TInt     iX;
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<a name="l00063"></a>00063         };
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<a name="l00064"></a>00064 
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<a name="l00065"></a>00065 <span class="comment">//</span>
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<a name="l00066"></a>00066 <span class="comment">// Implementation of the RTestTwo class</span>
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<a name="l00067"></a>00067 <span class="comment">//</span>
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<a name="l00068"></a>00068 RTestTwo::RTestTwo(TInt aValue)
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<a name="l00069"></a>00069         : iX(aValue)
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<a name="l00070"></a>00070         {
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<a name="l00071"></a>00071         }
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<a name="l00072"></a>00072 
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<a name="l00073"></a>00073 
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<a name="l00074"></a>00074 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtCloseRTestTwo,<span class="stringliteral">&quot;RTestTwo closing\n&quot;</span>);
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<a name="l00075"></a>00075 
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<a name="l00076"></a>00076 <span class="keywordtype">void</span> RTestTwo::Close()
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<a name="l00077"></a>00077         {
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<a name="l00078"></a>00078         console-&gt;Printf(KTxtCloseRTestTwo);
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<a name="l00079"></a>00079         }
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<a name="l00080"></a>00080 
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<a name="l00081"></a>00081 
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<a name="l00082"></a>00082 
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<a name="l00083"></a>00083 <span class="comment">//</span>
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<a name="l00084"></a>00084 <span class="comment">// Definition of the RTestThree class</span>
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<a name="l00085"></a>00085 <span class="comment">//</span>
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<a name="l00086"></a>00086 <span class="keyword">class </span>RTestThree
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<a name="l00087"></a>00087         {       
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<a name="l00088"></a>00088 <span class="keyword">public</span>:
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<a name="l00089"></a>00089         RTestThree(TInt aValue);
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<a name="l00090"></a>00090         <span class="keywordtype">void</span>     Release();
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<a name="l00091"></a>00091 <span class="keyword">private</span> :
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<a name="l00092"></a>00092         TInt     iY;
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<a name="l00093"></a>00093         };
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<a name="l00094"></a>00094 
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<a name="l00095"></a>00095 <span class="comment">//</span>
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<a name="l00096"></a>00096 <span class="comment">// Implementation of the RTestThree class</span>
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<a name="l00097"></a>00097 <span class="comment">//</span>
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<a name="l00098"></a>00098 RTestThree::RTestThree(TInt aValue)
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<a name="l00099"></a>00099         : iY(aValue)
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<a name="l00100"></a>00100         {
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<a name="l00101"></a>00101         }
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<a name="l00102"></a>00102 
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<a name="l00103"></a>00103 
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<a name="l00104"></a>00104 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtReleaseRTestThree,<span class="stringliteral">&quot;RTestThree releasing\n&quot;</span>);
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<a name="l00105"></a>00105 
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<a name="l00106"></a>00106 <span class="keywordtype">void</span> RTestThree::Release()
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<a name="l00107"></a>00107         {
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<a name="l00108"></a>00108         console-&gt;Printf(KTxtReleaseRTestThree);
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<a name="l00109"></a>00109         }
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<a name="l00110"></a>00110 
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<a name="l00111"></a>00111 <span class="comment">//</span>
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<a name="l00112"></a>00112 <span class="comment">// main body of the example</span>
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<a name="l00113"></a>00113 <span class="comment">//</span>
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<a name="l00114"></a>00114 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtHelloWorld,<span class="stringliteral">&quot;Hello World!&quot;</span>);
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<a name="l00115"></a>00115 LOCAL_C <span class="keywordtype">void</span> doExampleL()
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<a name="l00116"></a>00116     {
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<a name="l00117"></a>00117                 <span class="comment">// 1. Construct a CTestOne object on the heap</span>
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<a name="l00118"></a>00118         CTestOne* one = <span class="keyword">new</span> (ELeave) CTestOne;
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<a name="l00119"></a>00119         
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<a name="l00120"></a>00120                 <span class="comment">// Use the CleanupDeletePushL() function to put a TCleanUpItem</span>
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<a name="l00121"></a>00121                 <span class="comment">// on the cleanup stack</span>
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<a name="l00122"></a>00122         CleanupDeletePushL(one);
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<a name="l00123"></a>00123 
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<a name="l00124"></a>00124                 <span class="comment">// Exercise the CTestOne object (just to show it doing something)</span>
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<a name="l00125"></a>00125         one-&gt;SetTextL(KTxtHelloWorld);
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<a name="l00126"></a>00126 
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<a name="l00127"></a>00127                 <span class="comment">// Pop and destroy the cleanup item off the cleanup stack.</span>
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<a name="l00128"></a>00128                 <span class="comment">// The cleanup operation deletes the CTestOne object</span>
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<a name="l00129"></a>00129         CleanupStack::PopAndDestroy();
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<a name="l00130"></a>00130         
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<a name="l00131"></a>00131                 <span class="comment">// 2. Construct a RTestTwo object on the program stack.</span>
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<a name="l00132"></a>00132                 <span class="comment">//</span>
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<a name="l00133"></a>00133                 <span class="comment">// The value passed is of no significance; it is just</span>
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<a name="l00134"></a>00134                 <span class="comment">// to show that the class is not trivial.</span>
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<a name="l00135"></a>00135         RTestTwo  two(2);
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<a name="l00136"></a>00136                 
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<a name="l00137"></a>00137                 <span class="comment">// Use the CleanupClosePushL() function to put a TCleanUpItem</span>
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<a name="l00138"></a>00138                 <span class="comment">// on the cleanup stack</span>
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<a name="l00139"></a>00139         CleanupClosePushL(two);
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<a name="l00140"></a>00140 
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<a name="l00141"></a>00141                 <span class="comment">// Pop and destroy the cleanup item off the cleanup stack.</span>
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<a name="l00142"></a>00142                 <span class="comment">// The cleanup operation calls the Close() member function of</span>
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<a name="l00143"></a>00143                 <span class="comment">// the RTestTwo object</span>
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<a name="l00144"></a>00144         CleanupStack::PopAndDestroy();
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<a name="l00145"></a>00145                                 
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<a name="l00146"></a>00146 
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<a name="l00147"></a>00147                 <span class="comment">// 3. Construct a RTestThree object on the program stack.</span>
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<a name="l00148"></a>00148                 <span class="comment">//</span>
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<a name="l00149"></a>00149                 <span class="comment">// The value passed is of no significance; it is just</span>
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<a name="l00150"></a>00150                 <span class="comment">// to show that the class is not trivial.</span>
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<a name="l00151"></a>00151         RTestThree  three(3);
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<a name="l00152"></a>00152                 
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<a name="l00153"></a>00153                 <span class="comment">// Use the CleanupClosePushL() function to put a TCleanUpItem</span>
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<a name="l00154"></a>00154                 <span class="comment">// on the cleanup stack</span>
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<a name="l00155"></a>00155         CleanupReleasePushL(three);
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<a name="l00156"></a>00156 
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<a name="l00157"></a>00157                 <span class="comment">// Pop and destroy the cleanup item off the cleanup stack.</span>
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<a name="l00158"></a>00158                 <span class="comment">// The cleanup operation calls the Release() member function of</span>
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<a name="l00159"></a>00159                 <span class="comment">// the RTestThree object</span>
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<a name="l00160"></a>00160         CleanupStack::PopAndDestroy();
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<a name="l00161"></a>00161 
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<a name="l00162"></a>00162                 <span class="comment">// 4. Construct an array of objects on the heap</span>
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<a name="l00163"></a>00163         TInt heapSize1 = User::Heap().Count(); <span class="comment">// take a count of the heap size now</span>
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<a name="l00164"></a>00164         
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<a name="l00165"></a>00165         <span class="keyword">const</span> TInt KNumObjects = 4;
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<a name="l00166"></a>00166         <span class="keyword">const</span> TInt KStringLength = 10;
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<a name="l00167"></a>00167         TBuf&lt;KStringLength&gt;* four = <span class="keyword">new</span> (ELeave) TBuf&lt;KStringLength&gt;[KNumObjects];
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<a name="l00168"></a>00168                 <span class="comment">// Use the CleanupArrayDeletePushL() function to put a TCleanUpItem</span>
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<a name="l00169"></a>00169                 <span class="comment">// on the cleanup stack</span>
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<a name="l00170"></a>00170         CleanupArrayDeletePushL(four);
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<a name="l00171"></a>00171 
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<a name="l00172"></a>00172                 <span class="comment">// Do something that might leave - a simple memory allocation</span>
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<a name="l00173"></a>00173         TInt* mem = (TInt*)User::Alloc(100);
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<a name="l00174"></a>00174         <span class="keyword">delete</span> mem;
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<a name="l00175"></a>00175 
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<a name="l00176"></a>00176                 <span class="comment">// Pop and destroy the cleanup item off the cleanup stack.</span>
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<a name="l00177"></a>00177                 <span class="comment">// The cleanup operation deletes the CTestOne object</span>
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<a name="l00178"></a>00178         CleanupStack::PopAndDestroy();
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<a name="l00179"></a>00179         <span class="keywordflow">if</span> ( User::Heap().Count() == heapSize1 )
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<a name="l00180"></a>00180                 {
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<a name="l00181"></a>00181                 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFourComplete,<span class="stringliteral">&quot;Array deleted\n&quot;</span>);
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<a name="l00182"></a>00182                 console-&gt;Printf(KFourComplete);
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<a name="l00183"></a>00183                 }
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<a name="l00184"></a>00184         }
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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>