Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_simple_o_o_m_8cpp_source.html
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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>
<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">// Example checks the robustness of a simple class on Out Of Memory (OOM)</span>
<a name="l00015"></a>00015 <span class="comment">// NOTE: the structure of this example is different to standard E32 examples</span>
<a name="l00016"></a>00016 <span class="comment">//</span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#include <e32cons.h></span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="comment">// All messages written to this</span>
<a name="l00024"></a>00024 LOCAL_D CConsoleBase* console;
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="comment">// Function prototypes</span>
<a name="l00027"></a>00027 LOCAL_C <span class="keywordtype">void</span> doExampleL();
<a name="l00028"></a>00028 LOCAL_C <span class="keywordtype">void</span> callExampleL();
<a name="l00029"></a>00029
<a name="l00030"></a>00030
<a name="l00032"></a>00032 <span class="comment">//</span>
<a name="l00033"></a>00033 <span class="comment">// -----> CSimple (definition)</span>
<a name="l00034"></a>00034 <span class="comment">//</span>
<a name="l00036"></a>00036 <span class="comment"></span><span class="keyword">class </span>CSimple : <span class="keyword">public</span> CBase
<a name="l00037"></a>00037 {
<a name="l00038"></a>00038 <span class="keyword">public</span> :
<a name="l00039"></a>00039 <span class="keyword">static</span> CSimple* NewL(TInt aVal);
<a name="l00040"></a>00040 <span class="keyword">static</span> CSimple* NewLC(TInt aVal);
<a name="l00041"></a>00041 <span class="keywordtype">void</span> Display();
<a name="l00042"></a>00042 <span class="keyword">protected</span>:
<a name="l00043"></a>00043 CSimple(TInt aVal);
<a name="l00044"></a>00044 <span class="keyword">public</span>:
<a name="l00045"></a>00045 TInt iVal;
<a name="l00046"></a>00046 };
<a name="l00047"></a>00047
<a name="l00048"></a>00048
<a name="l00050"></a>00050 <span class="comment">//</span>
<a name="l00051"></a>00051 <span class="comment">// -----> CSimple (implementation)</span>
<a name="l00052"></a>00052 <span class="comment">//</span>
<a name="l00054"></a>00054 <span class="comment"></span>CSimple* CSimple::NewL(TInt aVal)
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 <span class="comment">// NB The NewL function uses the C++ constructor mechanism.</span>
<a name="l00057"></a>00057 CSimple* <span class="keyword">self</span>=<span class="keyword">new</span> (ELeave) CSimple(aVal);
<a name="l00058"></a>00058 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00059"></a>00059 }
<a name="l00060"></a>00060
<a name="l00061"></a>00061
<a name="l00062"></a>00062 CSimple* CSimple::NewLC(TInt aVal)
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064 <span class="comment">// NewLC is enriched with a push to the cleanup stack</span>
<a name="l00065"></a>00065 CSimple* <span class="keyword">self</span>=NewL(aVal);
<a name="l00066"></a>00066 CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00067"></a>00067 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00068"></a>00068 }
<a name="l00069"></a>00069
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="keywordtype">void</span> CSimple::Display()
<a name="l00072"></a>00072 {
<a name="l00073"></a>00073 <span class="comment">// Display class data member on the console.</span>
<a name="l00074"></a>00074 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat1,<span class="stringliteral">"Value=%d.\n"</span>);
<a name="l00075"></a>00075 console->Printf(KFormat1,iVal);
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077
<a name="l00078"></a>00078 CSimple::CSimple(TInt aVal)
<a name="l00079"></a>00079 : iVal(aVal)
<a name="l00080"></a>00080 {}
<a name="l00081"></a>00081
<a name="l00082"></a>00082
<a name="l00084"></a>00084 <span class="comment">//</span>
<a name="l00085"></a>00085 <span class="comment">// Main function called by E32</span>
<a name="l00086"></a>00086 <span class="comment">//</span>
<a name="l00088"></a>00088 <span class="comment"></span>GLDEF_C TInt E32Main()
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 <span class="comment">// Get cleanup stack</span>
<a name="l00091"></a>00091 CTrapCleanup* cleanup=CTrapCleanup::New();
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="comment">// Some more initialization, then do the example</span>
<a name="l00094"></a>00094 TRAPD(error,callExampleL());
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="comment">// callExampleL() should never leave.</span>
<a name="l00097"></a>00097 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgPanicEpoc32ex,<span class="stringliteral">"EPOC32EX"</span>);
<a name="l00098"></a>00098 __ASSERT_ALWAYS(!error,User::Panic(KMsgPanicEpoc32ex,error));
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="comment">// destroy the cleanup stack</span>
<a name="l00101"></a>00101 <span class="keyword">delete</span> cleanup;
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="comment">// return</span>
<a name="l00104"></a>00104 <span class="keywordflow">return</span> 0;
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106
<a name="l00107"></a>00107
<a name="l00109"></a>00109 <span class="comment">//</span>
<a name="l00110"></a>00110 <span class="comment">//</span>
<a name="l00111"></a>00111 <span class="comment">//</span>
<a name="l00113"></a>00113 <span class="comment"></span>LOCAL_C <span class="keywordtype">void</span> callExampleL()
<a name="l00114"></a>00114 {
<a name="l00115"></a>00115 <span class="comment">// Initialize and call the example code under cleanup stack.</span>
<a name="l00116"></a>00116 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgExampleCode,<span class="stringliteral">"Symbian platform Example Code"</span>);
<a name="l00117"></a>00117 console = Console::NewL(KMsgExampleCode,TSize(KConsFullScreen,KConsFullScreen));
<a name="l00118"></a>00118 <span class="comment">// Put console onto the cleanup stack.</span>
<a name="l00119"></a>00119 CleanupStack::PushL(console);
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <span class="comment">// Mark for alloc heaven tool</span>
<a name="l00122"></a>00122 __UHEAP_MARK;
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="comment">// Perform the example function under the protection of a </span>
<a name="l00125"></a>00125 <span class="comment">// TRAP harness.</span>
<a name="l00126"></a>00126 TRAPD(error,doExampleL());
<a name="l00127"></a>00127
<a name="l00128"></a>00128 <span class="comment">// Test the example for alloc heaven</span>
<a name="l00129"></a>00129 __UHEAP_MARKEND;
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="comment">// </span>
<a name="l00132"></a>00132 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgOK,<span class="stringliteral">"ok"</span>);
<a name="l00133"></a>00133 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat2,<span class="stringliteral">"Overall example Trap Harness failed: leave code=%d"</span>);
<a name="l00134"></a>00134 <span class="keywordflow">if</span> (error)
<a name="l00135"></a>00135 console->Printf(KFormat2, error);
<a name="l00136"></a>00136 <span class="keywordflow">else</span>
<a name="l00137"></a>00137 console->Printf(KMsgOK);
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="comment">// Continue</span>
<a name="l00140"></a>00140 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KMsgPressAnyKey,<span class="stringliteral">" [press any key]"</span>);
<a name="l00141"></a>00141 console->Printf(KMsgPressAnyKey);
<a name="l00142"></a>00142 console->Getch();
<a name="l00143"></a>00143
<a name="l00144"></a>00144 <span class="comment">// Remove the console object from the cleanupstack</span>
<a name="l00145"></a>00145 <span class="comment">// and destroy it. </span>
<a name="l00146"></a>00146 CleanupStack::PopAndDestroy();
<a name="l00147"></a>00147 }
<a name="l00148"></a>00148
<a name="l00149"></a>00149
<a name="l00151"></a>00151 <span class="comment">//</span>
<a name="l00152"></a>00152 <span class="comment">// Do the example</span>
<a name="l00153"></a>00153 <span class="comment">//</span>
<a name="l00154"></a>00154 <span class="comment">// Example checks the robustness of class on OOM</span>
<a name="l00156"></a>00156 <span class="comment"></span><span class="keywordtype">void</span> doExampleL()
<a name="l00157"></a>00157 {
<a name="l00158"></a>00158 <span class="comment">// Start up the allocation failure tool to fail </span>
<a name="l00159"></a>00159 <span class="comment">// in the third cycle (arg=3 as there is 1 new</span>
<a name="l00160"></a>00160 <span class="comment">// per cycle)</span>
<a name="l00161"></a>00161 __UHEAP_SETFAIL(RHeap::EDeterministic,3);
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="keywordflow">for</span>(TInt ii=1;ii<4;ii++)
<a name="l00164"></a>00164 {
<a name="l00165"></a>00165 <span class="comment">// Display status information</span>
<a name="l00166"></a>00166 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat3,<span class="stringliteral">"Cycle %d.\n"</span>);
<a name="l00167"></a>00167 console->Printf(KFormat3,ii);
<a name="l00168"></a>00168 <span class="comment">// Create new instance</span>
<a name="l00169"></a>00169 CSimple* mySimpleExample = CSimple::NewL(2);
<a name="l00170"></a>00170 <span class="comment">// Display the instance</span>
<a name="l00171"></a>00171 mySimpleExample->Display();
<a name="l00172"></a>00172 <span class="comment">// Destroy the instance</span>
<a name="l00173"></a>00173 <span class="keyword">delete</span> mySimpleExample;
<a name="l00174"></a>00174 }
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177
<a name="l00178"></a>00178
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