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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_simple_o_o_m_8cpp_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 13 Aug 2010 16:47:46 +0100
changeset 14 578be2adaf3e
parent 6 43e37759235e
permissions -rw-r--r--
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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/SimpleOOM/SimpleOOM.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/SimpleOOM/SimpleOOM.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">// Example checks the robustness of a simple class on Out Of Memory (OOM)</span>
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<a name="l00015"></a>00015 <span class="comment">// NOTE: the structure of this example is different to standard E32 examples</span>
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<a name="l00016"></a>00016 <span class="comment">//</span>
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<a name="l00017"></a>00017
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<a name="l00018"></a>00018
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<a name="l00019"></a>00019 <span class="preprocessor">#include &lt;e32cons.h&gt;</span>
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<a name="l00022"></a>00022
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<a name="l00023"></a>00023   <span class="comment">// All messages written to this</span>
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<a name="l00024"></a>00024 LOCAL_D CConsoleBase* console;
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<a name="l00025"></a>00025
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<a name="l00026"></a>00026   <span class="comment">// Function prototypes</span>
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<a name="l00027"></a>00027 LOCAL_C <span class="keywordtype">void</span> doExampleL();
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<a name="l00028"></a>00028 LOCAL_C <span class="keywordtype">void</span> callExampleL();
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<a name="l00029"></a>00029
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<a name="l00032"></a>00032 <span class="comment">//</span>
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<a name="l00033"></a>00033 <span class="comment">// -----&gt; CSimple (definition)</span>
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<a name="l00034"></a>00034 <span class="comment">//</span>
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<a name="l00036"></a>00036 <span class="comment"></span><span class="keyword">class </span>CSimple : <span class="keyword">public</span> CBase
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<a name="l00037"></a>00037         {
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<a name="l00038"></a>00038 <span class="keyword">public</span> :
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<a name="l00039"></a>00039         <span class="keyword">static</span> CSimple* NewL(TInt aVal);
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<a name="l00040"></a>00040         <span class="keyword">static</span> CSimple* NewLC(TInt aVal);
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<a name="l00041"></a>00041         <span class="keywordtype">void</span>   Display();
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<a name="l00042"></a>00042 <span class="keyword">protected</span>:
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<a name="l00043"></a>00043         CSimple(TInt aVal);
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<a name="l00044"></a>00044 <span class="keyword">public</span>:
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<a name="l00045"></a>00045         TInt   iVal;
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<a name="l00046"></a>00046         };
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<a name="l00047"></a>00047
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<a name="l00048"></a>00048
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<a name="l00050"></a>00050 <span class="comment">//</span>
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<a name="l00051"></a>00051 <span class="comment">// -----&gt; CSimple (implementation)</span>
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<a name="l00052"></a>00052 <span class="comment">//</span>
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<a name="l00054"></a>00054 <span class="comment"></span>CSimple* CSimple::NewL(TInt aVal)
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<a name="l00055"></a>00055         {
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<a name="l00056"></a>00056           <span class="comment">// NB The NewL function uses the C++ constructor mechanism.</span>
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<a name="l00057"></a>00057         CSimple* <span class="keyword">self</span>=<span class="keyword">new</span> (ELeave) CSimple(aVal);
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<a name="l00058"></a>00058         <span class="keywordflow">return</span> <span class="keyword">self</span>;
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<a name="l00059"></a>00059         }
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<a name="l00060"></a>00060
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<a name="l00061"></a>00061
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<a name="l00062"></a>00062 CSimple* CSimple::NewLC(TInt aVal)
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<a name="l00063"></a>00063         {
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<a name="l00064"></a>00064           <span class="comment">// NewLC is enriched with a push to the cleanup stack</span>
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<a name="l00065"></a>00065         CSimple* <span class="keyword">self</span>=NewL(aVal);
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<a name="l00066"></a>00066         CleanupStack::PushL(<span class="keyword">self</span>);
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<a name="l00067"></a>00067         <span class="keywordflow">return</span> <span class="keyword">self</span>;
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<a name="l00068"></a>00068         }
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<a name="l00069"></a>00069
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<a name="l00071"></a>00071 <span class="keywordtype">void</span> CSimple::Display()
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<a name="l00072"></a>00072         {
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<a name="l00073"></a>00073           <span class="comment">// Display class data member on the console.</span>
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<a name="l00074"></a>00074         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat1,<span class="stringliteral">&quot;Value=%d.\n&quot;</span>);
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<a name="l00075"></a>00075         console-&gt;Printf(KFormat1,iVal);
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<a name="l00076"></a>00076         }
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<a name="l00077"></a>00077
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<a name="l00078"></a>00078 CSimple::CSimple(TInt aVal)
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<a name="l00079"></a>00079         : iVal(aVal)
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<a name="l00080"></a>00080         {}
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<a name="l00084"></a>00084 <span class="comment">//</span>
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<a name="l00085"></a>00085 <span class="comment">// Main function called by E32</span>
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<a name="l00086"></a>00086 <span class="comment">//</span>
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<a name="l00088"></a>00088 <span class="comment"></span>GLDEF_C TInt E32Main()
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<a name="l00089"></a>00089     {
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<a name="l00090"></a>00090           <span class="comment">// Get cleanup stack</span>
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<a name="l00091"></a>00091         CTrapCleanup* cleanup=CTrapCleanup::New();
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<a name="l00092"></a>00092
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<a name="l00093"></a>00093           <span class="comment">// Some more initialization, then do the example</span>
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<a name="l00094"></a>00094         TRAPD(error,callExampleL());
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<a name="l00095"></a>00095
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<a name="l00096"></a>00096           <span class="comment">// callExampleL() should never leave.</span>
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<a name="l00097"></a>00097         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgPanicEpoc32ex,<span class="stringliteral">&quot;EPOC32EX&quot;</span>);
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<a name="l00098"></a>00098         __ASSERT_ALWAYS(!error,User::Panic(KMsgPanicEpoc32ex,error));
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<a name="l00099"></a>00099
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<a name="l00100"></a>00100           <span class="comment">// destroy the cleanup stack</span>
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<a name="l00101"></a>00101         <span class="keyword">delete</span> cleanup;
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<a name="l00102"></a>00102
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<a name="l00103"></a>00103           <span class="comment">// return</span>
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<a name="l00104"></a>00104         <span class="keywordflow">return</span> 0;
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<a name="l00105"></a>00105     }
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<a name="l00106"></a>00106
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<a name="l00107"></a>00107
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<a name="l00109"></a>00109 <span class="comment">//</span>
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<a name="l00110"></a>00110 <span class="comment">//</span>
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<a name="l00111"></a>00111 <span class="comment">//</span>
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<a name="l00113"></a>00113 <span class="comment"></span>LOCAL_C <span class="keywordtype">void</span> callExampleL()
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<a name="l00114"></a>00114     {
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<a name="l00115"></a>00115           <span class="comment">// Initialize and call the example code under cleanup stack.</span>
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<a name="l00116"></a>00116         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgExampleCode,<span class="stringliteral">&quot;Symbian platform Example Code&quot;</span>);
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<a name="l00117"></a>00117         console = Console::NewL(KMsgExampleCode,TSize(KConsFullScreen,KConsFullScreen));
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<a name="l00118"></a>00118           <span class="comment">// Put console onto the cleanup stack.</span>
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<a name="l00119"></a>00119         CleanupStack::PushL(console);
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<a name="l00120"></a>00120
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<a name="l00121"></a>00121           <span class="comment">// Mark for alloc heaven tool</span>
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<a name="l00122"></a>00122         __UHEAP_MARK;
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<a name="l00123"></a>00123
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<a name="l00124"></a>00124           <span class="comment">// Perform the example function under the protection of a </span>
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<a name="l00125"></a>00125           <span class="comment">// TRAP harness.</span>
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<a name="l00126"></a>00126         TRAPD(error,doExampleL());
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<a name="l00127"></a>00127
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<a name="l00128"></a>00128           <span class="comment">// Test the example for alloc heaven</span>
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<a name="l00129"></a>00129           __UHEAP_MARKEND;
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<a name="l00130"></a>00130
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<a name="l00131"></a>00131           <span class="comment">// </span>
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<a name="l00132"></a>00132         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgOK,<span class="stringliteral">&quot;ok&quot;</span>);
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<a name="l00133"></a>00133         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat2,<span class="stringliteral">&quot;Overall example Trap Harness failed: leave code=%d&quot;</span>);
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<a name="l00134"></a>00134         <span class="keywordflow">if</span> (error)
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<a name="l00135"></a>00135                 console-&gt;Printf(KFormat2, error);
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<a name="l00136"></a>00136         <span class="keywordflow">else</span>
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<a name="l00137"></a>00137                 console-&gt;Printf(KMsgOK);
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<a name="l00138"></a>00138
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<a name="l00139"></a>00139           <span class="comment">// Continue</span>
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<a name="l00140"></a>00140         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgPressAnyKey,<span class="stringliteral">&quot; [press any key]&quot;</span>);
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<a name="l00141"></a>00141         console-&gt;Printf(KMsgPressAnyKey);
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<a name="l00142"></a>00142         console-&gt;Getch();
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<a name="l00143"></a>00143
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<a name="l00144"></a>00144           <span class="comment">// Remove the console object from the cleanupstack</span>
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<a name="l00145"></a>00145           <span class="comment">// and destroy it. </span>
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<a name="l00146"></a>00146         CleanupStack::PopAndDestroy();
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<a name="l00147"></a>00147     }
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<a name="l00148"></a>00148
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<a name="l00149"></a>00149
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<a name="l00151"></a>00151 <span class="comment">//</span>
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<a name="l00152"></a>00152 <span class="comment">// Do the example</span>
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<a name="l00153"></a>00153 <span class="comment">//</span>
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<a name="l00154"></a>00154 <span class="comment">// Example checks the robustness of class on OOM</span>
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<a name="l00156"></a>00156 <span class="comment"></span><span class="keywordtype">void</span> doExampleL()
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<a name="l00157"></a>00157         {
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<a name="l00158"></a>00158           <span class="comment">// Start up the allocation failure tool to fail </span>
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<a name="l00159"></a>00159           <span class="comment">// in the third cycle (arg=3 as there is 1 new</span>
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<a name="l00160"></a>00160           <span class="comment">// per cycle)</span>
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<a name="l00161"></a>00161         __UHEAP_SETFAIL(RHeap::EDeterministic,3);
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<a name="l00162"></a>00162
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<a name="l00163"></a>00163         <span class="keywordflow">for</span>(TInt ii=1;ii&lt;4;ii++)
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<a name="l00164"></a>00164                 {
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<a name="l00165"></a>00165                   <span class="comment">// Display status information</span>
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<a name="l00166"></a>00166                 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat3,<span class="stringliteral">&quot;Cycle %d.\n&quot;</span>);
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<a name="l00167"></a>00167                 console-&gt;Printf(KFormat3,ii);
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<a name="l00168"></a>00168                   <span class="comment">// Create new instance</span>
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<a name="l00169"></a>00169                 CSimple* mySimpleExample = CSimple::NewL(2);
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<a name="l00170"></a>00170                   <span class="comment">// Display the instance</span>
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<a name="l00171"></a>00171                 mySimpleExample-&gt;Display();
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<a name="l00172"></a>00172                   <span class="comment">// Destroy the instance</span>
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<a name="l00173"></a>00173                 <span class="keyword">delete</span> mySimpleExample;
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<a name="l00174"></a>00174                 }
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<a name="l00175"></a>00175         }
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<a name="l00176"></a>00176
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<a name="l00177"></a>00177
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<a name="l00178"></a>00178
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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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