Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_utilities_8cpp_source.html
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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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>
<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
<a name="l00004"></a>00004 <span class="comment">// under the terms of "Eclipse Public License v1.0"</span>
<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
<a name="l00006"></a>00006 <span class="comment">// at the URL "http://www.eclipse.org/legal/epl-v10.html".</span>
<a name="l00007"></a>00007 <span class="comment">//</span>
<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
<a name="l00010"></a>00010 <span class="comment">//</span>
<a name="l00011"></a>00011 <span class="comment">// Contributors:</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// Description:</span>
<a name="l00014"></a>00014 <span class="comment">//</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="preprocessor">#include "CommonFramework.h"</span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="comment">//</span>
<a name="l00019"></a>00019 <span class="comment">// Definition of the CTestOne class</span>
<a name="l00020"></a>00020 <span class="comment">//</span>
<a name="l00021"></a>00021 <span class="keyword">class </span>CTestOne : <span class="keyword">public</span> CBase
<a name="l00022"></a>00022 {
<a name="l00023"></a>00023 <span class="keyword">public</span>:
<a name="l00024"></a>00024 ~CTestOne();
<a name="l00025"></a>00025 <span class="keywordtype">void</span> SetTextL(<span class="keyword">const</span> TDesC& aData);
<a name="l00026"></a>00026 <span class="keyword">private</span> :
<a name="l00027"></a>00027 HBufC* iText;
<a name="l00028"></a>00028 };
<a name="l00029"></a>00029
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="comment">//</span>
<a name="l00032"></a>00032 <span class="comment">// Implementation of the CTestOne class</span>
<a name="l00033"></a>00033 <span class="comment">//</span>
<a name="l00034"></a>00034 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtInsideDestructor,<span class="stringliteral">"Executing the CTestOne destructor\n"</span>);
<a name="l00035"></a>00035 CTestOne::~CTestOne()
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 <span class="keyword">delete</span> iText;
<a name="l00038"></a>00038 console->Printf(KTxtInsideDestructor);
<a name="l00039"></a>00039 }
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="keywordtype">void</span> CTestOne::SetTextL(<span class="keyword">const</span> TDesC& aData)
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043 <span class="keywordflow">if</span> (iText)
<a name="l00044"></a>00044 {
<a name="l00045"></a>00045 <span class="keyword">delete</span> iText;
<a name="l00046"></a>00046 iText = NULL;
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048 iText = aData.AllocL();
<a name="l00049"></a>00049 }
<a name="l00050"></a>00050
<a name="l00051"></a>00051
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <span class="comment">//</span>
<a name="l00054"></a>00054 <span class="comment">// Definition of the RTestTwo class</span>
<a name="l00055"></a>00055 <span class="comment">//</span>
<a name="l00056"></a>00056 <span class="keyword">class </span>RTestTwo
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 <span class="keyword">public</span>:
<a name="l00059"></a>00059 RTestTwo(TInt aValue);
<a name="l00060"></a>00060 <span class="keywordtype">void</span> Close();
<a name="l00061"></a>00061 <span class="keyword">private</span> :
<a name="l00062"></a>00062 TInt iX;
<a name="l00063"></a>00063 };
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="comment">//</span>
<a name="l00066"></a>00066 <span class="comment">// Implementation of the RTestTwo class</span>
<a name="l00067"></a>00067 <span class="comment">//</span>
<a name="l00068"></a>00068 RTestTwo::RTestTwo(TInt aValue)
<a name="l00069"></a>00069 : iX(aValue)
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtCloseRTestTwo,<span class="stringliteral">"RTestTwo closing\n"</span>);
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="keywordtype">void</span> RTestTwo::Close()
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078 console->Printf(KTxtCloseRTestTwo);
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080
<a name="l00081"></a>00081
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="comment">//</span>
<a name="l00084"></a>00084 <span class="comment">// Definition of the RTestThree class</span>
<a name="l00085"></a>00085 <span class="comment">//</span>
<a name="l00086"></a>00086 <span class="keyword">class </span>RTestThree
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 <span class="keyword">public</span>:
<a name="l00089"></a>00089 RTestThree(TInt aValue);
<a name="l00090"></a>00090 <span class="keywordtype">void</span> Release();
<a name="l00091"></a>00091 <span class="keyword">private</span> :
<a name="l00092"></a>00092 TInt iY;
<a name="l00093"></a>00093 };
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="comment">//</span>
<a name="l00096"></a>00096 <span class="comment">// Implementation of the RTestThree class</span>
<a name="l00097"></a>00097 <span class="comment">//</span>
<a name="l00098"></a>00098 RTestThree::RTestThree(TInt aValue)
<a name="l00099"></a>00099 : iY(aValue)
<a name="l00100"></a>00100 {
<a name="l00101"></a>00101 }
<a name="l00102"></a>00102
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtReleaseRTestThree,<span class="stringliteral">"RTestThree releasing\n"</span>);
<a name="l00105"></a>00105
<a name="l00106"></a>00106 <span class="keywordtype">void</span> RTestThree::Release()
<a name="l00107"></a>00107 {
<a name="l00108"></a>00108 console->Printf(KTxtReleaseRTestThree);
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="comment">//</span>
<a name="l00112"></a>00112 <span class="comment">// main body of the example</span>
<a name="l00113"></a>00113 <span class="comment">//</span>
<a name="l00114"></a>00114 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtHelloWorld,<span class="stringliteral">"Hello World!"</span>);
<a name="l00115"></a>00115 LOCAL_C <span class="keywordtype">void</span> doExampleL()
<a name="l00116"></a>00116 {
<a name="l00117"></a>00117 <span class="comment">// 1. Construct a CTestOne object on the heap</span>
<a name="l00118"></a>00118 CTestOne* one = <span class="keyword">new</span> (ELeave) CTestOne;
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="comment">// Use the CleanupDeletePushL() function to put a TCleanUpItem</span>
<a name="l00121"></a>00121 <span class="comment">// on the cleanup stack</span>
<a name="l00122"></a>00122 CleanupDeletePushL(one);
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="comment">// Exercise the CTestOne object (just to show it doing something)</span>
<a name="l00125"></a>00125 one->SetTextL(KTxtHelloWorld);
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="comment">// Pop and destroy the cleanup item off the cleanup stack.</span>
<a name="l00128"></a>00128 <span class="comment">// The cleanup operation deletes the CTestOne object</span>
<a name="l00129"></a>00129 CleanupStack::PopAndDestroy();
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="comment">// 2. Construct a RTestTwo object on the program stack.</span>
<a name="l00132"></a>00132 <span class="comment">//</span>
<a name="l00133"></a>00133 <span class="comment">// The value passed is of no significance; it is just</span>
<a name="l00134"></a>00134 <span class="comment">// to show that the class is not trivial.</span>
<a name="l00135"></a>00135 RTestTwo two(2);
<a name="l00136"></a>00136
<a name="l00137"></a>00137 <span class="comment">// Use the CleanupClosePushL() function to put a TCleanUpItem</span>
<a name="l00138"></a>00138 <span class="comment">// on the cleanup stack</span>
<a name="l00139"></a>00139 CleanupClosePushL(two);
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <span class="comment">// Pop and destroy the cleanup item off the cleanup stack.</span>
<a name="l00142"></a>00142 <span class="comment">// The cleanup operation calls the Close() member function of</span>
<a name="l00143"></a>00143 <span class="comment">// the RTestTwo object</span>
<a name="l00144"></a>00144 CleanupStack::PopAndDestroy();
<a name="l00145"></a>00145
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="comment">// 3. Construct a RTestThree object on the program stack.</span>
<a name="l00148"></a>00148 <span class="comment">//</span>
<a name="l00149"></a>00149 <span class="comment">// The value passed is of no significance; it is just</span>
<a name="l00150"></a>00150 <span class="comment">// to show that the class is not trivial.</span>
<a name="l00151"></a>00151 RTestThree three(3);
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <span class="comment">// Use the CleanupClosePushL() function to put a TCleanUpItem</span>
<a name="l00154"></a>00154 <span class="comment">// on the cleanup stack</span>
<a name="l00155"></a>00155 CleanupReleasePushL(three);
<a name="l00156"></a>00156
<a name="l00157"></a>00157 <span class="comment">// Pop and destroy the cleanup item off the cleanup stack.</span>
<a name="l00158"></a>00158 <span class="comment">// The cleanup operation calls the Release() member function of</span>
<a name="l00159"></a>00159 <span class="comment">// the RTestThree object</span>
<a name="l00160"></a>00160 CleanupStack::PopAndDestroy();
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="comment">// 4. Construct an array of objects on the heap</span>
<a name="l00163"></a>00163 TInt heapSize1 = User::Heap().Count(); <span class="comment">// take a count of the heap size now</span>
<a name="l00164"></a>00164
<a name="l00165"></a>00165 <span class="keyword">const</span> TInt KNumObjects = 4;
<a name="l00166"></a>00166 <span class="keyword">const</span> TInt KStringLength = 10;
<a name="l00167"></a>00167 TBuf<KStringLength>* four = <span class="keyword">new</span> (ELeave) TBuf<KStringLength>[KNumObjects];
<a name="l00168"></a>00168 <span class="comment">// Use the CleanupArrayDeletePushL() function to put a TCleanUpItem</span>
<a name="l00169"></a>00169 <span class="comment">// on the cleanup stack</span>
<a name="l00170"></a>00170 CleanupArrayDeletePushL(four);
<a name="l00171"></a>00171
<a name="l00172"></a>00172 <span class="comment">// Do something that might leave - a simple memory allocation</span>
<a name="l00173"></a>00173 TInt* mem = (TInt*)User::Alloc(100);
<a name="l00174"></a>00174 <span class="keyword">delete</span> mem;
<a name="l00175"></a>00175
<a name="l00176"></a>00176 <span class="comment">// Pop and destroy the cleanup item off the cleanup stack.</span>
<a name="l00177"></a>00177 <span class="comment">// The cleanup operation deletes the CTestOne object</span>
<a name="l00178"></a>00178 CleanupStack::PopAndDestroy();
<a name="l00179"></a>00179 <span class="keywordflow">if</span> ( User::Heap().Count() == heapSize1 )
<a name="l00180"></a>00180 {
<a name="l00181"></a>00181 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFourComplete,<span class="stringliteral">"Array deleted\n"</span>);
<a name="l00182"></a>00182 console->Printf(KFourComplete);
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184 }
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