Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/euserhlexample_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/SysLibs/EUserHLExample/src/euserhlexample.cpp</h1><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>
<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 <f32file.h></span>
<a name="l00017"></a>00017 <span class="preprocessor">#include <e32cons.h></span>
<a name="l00018"></a>00018 <span class="preprocessor">#include <euserhl.h></span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtExample,<span class="stringliteral">"EUsableExample\n"</span>);
<a name="l00022"></a>00022 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPressAnyKeyToContinue,<span class="stringliteral">"Press any key to continue\n"</span>);
<a name="l00023"></a>00023
<a name="l00024"></a>00024 CConsoleBase* gConsole;
<a name="l00025"></a>00025
<a name="l00032"></a>00032 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KPath, <span class="stringliteral">"c:\\a\\b\\c"</span>);
<a name="l00033"></a>00033 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KOne, <span class="stringliteral">"One "</span>);
<a name="l00034"></a>00034 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTwo, <span class="stringliteral">"Two "</span>);
<a name="l00035"></a>00035 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTesting, <span class="stringliteral">"Testing "</span>);
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="keywordtype">void</span> MaybeLeave()
<a name="l00038"></a>00038 {
<a name="l00039"></a>00039 <span class="comment">// Some code that may leave</span>
<a name="l00040"></a>00040 }
<a name="l00041"></a>00041
<a name="l00042"></a>00042 HBufC* AllocateNameL(<span class="keyword">const</span> TDesC& aDes)
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 <span class="keywordflow">return</span> aDes.AllocL();
<a name="l00045"></a>00045 }
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="keywordtype">void</span> GetCurrentPath(TDes& aDes)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 aDes = KPath;
<a name="l00050"></a>00050 }
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="keywordtype">void</span> GetCurrentPathString(LString& aString)
<a name="l00053"></a>00053 {
<a name="l00054"></a>00054 aString = KPath; <span class="comment">// Will auto-grow if necessary, may leave</span>
<a name="l00055"></a>00055 }
<a name="l00056"></a>00056
<a name="l00057"></a>00057 LString AppendCurrentPathStringL(LString aString)
<a name="l00058"></a>00058 {
<a name="l00059"></a>00059 <span class="comment">/*</span>
<a name="l00060"></a>00060 <span class="comment"> This method accepts and returns LStrings by value. It works but</span>
<a name="l00061"></a>00061 <span class="comment"> is not recommended due to the inherent inefficiencies.</span>
<a name="l00062"></a>00062 <span class="comment"> */</span>
<a name="l00063"></a>00063 LString result(aString);
<a name="l00064"></a>00064 result += KPath;
<a name="l00065"></a>00065 <span class="keywordflow">return</span> result;
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="keyword">class </span>CTicker : <span class="keyword">public</span> CBase
<a name="l00069"></a>00069 {
<a name="l00070"></a>00070 <span class="keyword">public</span>:
<a name="l00071"></a>00071 <span class="keywordtype">void</span> Tick() { ++iTicks; }
<a name="l00072"></a>00072 <span class="keywordtype">void</span> Tock() { ++iTocks; }
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="keywordtype">void</span> Zap() { <span class="keyword">delete</span> <span class="keyword">this</span>; }
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="keyword">public</span>:
<a name="l00077"></a>00077 TInt iTicks;
<a name="l00078"></a>00078 TInt iTocks;
<a name="l00079"></a>00079 };
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="comment">// Defines a custom pointer cleanup policy that calls the Zap member</span>
<a name="l00082"></a>00082 <span class="keyword">class </span>TTickerZapStrategy
<a name="l00083"></a>00083 {
<a name="l00084"></a>00084 <span class="keyword">public</span>:
<a name="l00085"></a>00085 <span class="keyword">static</span> <span class="keywordtype">void</span> Cleanup(CTicker* aPtr)
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 <span class="comment">/*</span>
<a name="l00088"></a>00088 <span class="comment"> The general template/class scaffolding remains the same</span>
<a name="l00089"></a>00089 <span class="comment"> for all custom cleanups, just this cleanup body varies</span>
<a name="l00090"></a>00090 <span class="comment"> */</span>
<a name="l00091"></a>00091 aPtr->Zap();
<a name="l00092"></a>00092 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPrintZapp, <span class="stringliteral">"Zapped CTicker\n"</span>);
<a name="l00093"></a>00093 gConsole->Printf(KTxtPrintZapp);
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 };
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="keywordtype">void</span> RegisterTicker(CTicker& aTicker)
<a name="l00098"></a>00098 {
<a name="l00099"></a>00099 (void)aTicker;
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="keywordtype">void</span> RegisterTickerPtr(CTicker* aTicker)
<a name="l00103"></a>00103 {
<a name="l00104"></a>00104 (void)aTicker;
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="keywordtype">void</span> TakeTickerOwnership(CTicker* aTicker)
<a name="l00108"></a>00108 {
<a name="l00109"></a>00109 <span class="keyword">delete</span> aTicker;
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="keywordtype">void</span> RegisterTimer(RTimer& aTimer)
<a name="l00113"></a>00113 {
<a name="l00114"></a>00114 (void)aTimer;
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="comment">// Defines a custom handle cleanup policy that calls Cancel() then Close()</span>
<a name="l00118"></a>00118 <span class="keyword">class </span>TCancelClose
<a name="l00119"></a>00119 {
<a name="l00120"></a>00120 <span class="keyword">public</span>:
<a name="l00121"></a>00121 <span class="keyword">template</span> <<span class="keyword">class</span> T>
<a name="l00122"></a>00122 <span class="keyword">static</span> <span class="keywordtype">void</span> Cleanup(T* aHandle)
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124 <span class="comment">/*</span>
<a name="l00125"></a>00125 <span class="comment"> The general template/class scaffolding remains the same</span>
<a name="l00126"></a>00126 <span class="comment"> for all custom cleanups, just this cleanup body varies</span>
<a name="l00127"></a>00127 <span class="comment"> */</span>
<a name="l00128"></a>00128 aHandle->Cancel();
<a name="l00129"></a>00129 aHandle->Close();
<a name="l00130"></a>00130 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtCancel,<span class="stringliteral">"Cancel Closed RTimer\n"</span>);
<a name="l00131"></a>00131 gConsole->Printf(KTxtCancel);
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133 };
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="keywordtype">void</span> BespokeCleanupFunction(TAny* <span class="comment">/*aData*/</span>)
<a name="l00136"></a>00136 {
<a name="l00137"></a>00137 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtCleanup,<span class="stringliteral">"BespokeCleanupFunction\n"</span>);
<a name="l00138"></a>00138 gConsole->Printf(KTxtCleanup);
<a name="l00139"></a>00139 }
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <span class="comment">// The walkthroughs themselves</span>
<a name="l00142"></a>00142
<a name="l00149"></a>00149 <span class="keyword">class </span>CStringUserTwoPhase : <span class="keyword">public</span> CBase
<a name="l00150"></a>00150 {
<a name="l00151"></a>00151 <span class="keyword">public</span>:
<a name="l00152"></a>00152 <span class="keyword">static</span> CStringUserTwoPhase* NewL(<span class="keyword">const</span> TDesC& aName)
<a name="l00153"></a>00153 {
<a name="l00154"></a>00154 <span class="comment">/*</span>
<a name="l00155"></a>00155 <span class="comment"> We can use the resource management utility classes in</span>
<a name="l00156"></a>00156 <span class="comment"> two-phase if we want.</span>
<a name="l00157"></a>00157 <span class="comment"> */</span>
<a name="l00158"></a>00158 LCleanedupPtr<CStringUserTwoPhase> <span class="keyword">self</span>(<span class="keyword">new</span>(ELeave) CStringUserTwoPhase);
<a name="l00159"></a>00159 <span class="keyword">self</span>->Construct(aName);
<a name="l00160"></a>00160 <span class="comment">/*</span>
<a name="l00161"></a>00161 <span class="comment"> Calling Unmanage() disables cleanup and yields the</span>
<a name="l00162"></a>00162 <span class="comment"> previously managed pointer so that it can be safely</span>
<a name="l00163"></a>00163 <span class="comment"> returned</span>
<a name="l00164"></a>00164 <span class="comment"> */</span>
<a name="l00165"></a>00165 <span class="keywordflow">return</span> <span class="keyword">self</span>.Unmanage();
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167
<a name="l00168"></a>00168 <span class="keyword">virtual</span> <span class="keywordtype">void</span> Construct(<span class="keyword">const</span> TDesC& aName)
<a name="l00169"></a>00169 {
<a name="l00170"></a>00170 <span class="comment">/*</span>
<a name="l00171"></a>00171 <span class="comment"> This assignment may leave if LString fails to allocate a</span>
<a name="l00172"></a>00172 <span class="comment"> heap buffer large enough to hold the data in aName</span>
<a name="l00173"></a>00173 <span class="comment"> */</span>
<a name="l00174"></a>00174 iName = aName;
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177 ~CStringUserTwoPhase()
<a name="l00178"></a>00178 {
<a name="l00179"></a>00179 <span class="comment">// The iName LString cleans up after itself automatically </span>
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181
<a name="l00182"></a>00182 <span class="keyword">const</span> TDesC& Name()
<a name="l00183"></a>00183 {
<a name="l00184"></a>00184 <span class="comment">// We can just return an LString directly as a const TDesC</span>
<a name="l00185"></a>00185 <span class="keywordflow">return</span> iName;
<a name="l00186"></a>00186 }
<a name="l00187"></a>00187
<a name="l00188"></a>00188 <span class="keyword">protected</span>:
<a name="l00189"></a>00189 CStringUserTwoPhase()
<a name="l00190"></a>00190 {
<a name="l00191"></a>00191 <span class="comment">/*</span>
<a name="l00192"></a>00192 <span class="comment"> Everything interesting happens in ConstructL in this</span>
<a name="l00193"></a>00193 <span class="comment"> version. </span>
<a name="l00194"></a>00194 <span class="comment"></span>
<a name="l00195"></a>00195 <span class="comment"> Default initialization of the iName LString does not</span>
<a name="l00196"></a>00196 <span class="comment"> allocate a heap buffer, and so cannot leave. As long as</span>
<a name="l00197"></a>00197 <span class="comment"> initialization is deferred to ConstructL, LStrings can be</span>
<a name="l00198"></a>00198 <span class="comment"> used safely with two-phase construction.</span>
<a name="l00199"></a>00199 <span class="comment"> */</span>
<a name="l00200"></a>00200 }
<a name="l00201"></a>00201
<a name="l00202"></a>00202 <span class="keyword">protected</span>:
<a name="l00203"></a>00203 LString iName;
<a name="l00204"></a>00204 };
<a name="l00205"></a>00205
<a name="l00217"></a>00217 <span class="keyword">class </span>CStringUserSinglePhase : <span class="keyword">public</span> CBase
<a name="l00218"></a>00218 {
<a name="l00219"></a>00219 <span class="keyword">public</span>:
<a name="l00220"></a>00220 <span class="comment">/*</span>
<a name="l00221"></a>00221 <span class="comment"> This macro is necessary to ensure cleanup is correctly handled</span>
<a name="l00222"></a>00222 <span class="comment"> in the event that a constructor may leave beneath a call to</span>
<a name="l00223"></a>00223 <span class="comment"> new(ELeave)</span>
<a name="l00224"></a>00224 <span class="comment"> */</span>
<a name="l00225"></a>00225 CONSTRUCTORS_MAY_LEAVE
<a name="l00226"></a>00226
<a name="l00227"></a>00227 <span class="keyword">static</span> CStringUserSinglePhase* NewL(<span class="keyword">const</span> TDesC& aName)
<a name="l00228"></a>00228 {
<a name="l00229"></a>00229 <span class="keywordflow">return</span> <span class="keyword">new</span>(ELeave) CStringUserSinglePhase(aName);
<a name="l00230"></a>00230 }
<a name="l00231"></a>00231
<a name="l00232"></a>00232 ~CStringUserSinglePhase()
<a name="l00233"></a>00233 {
<a name="l00234"></a>00234 <span class="comment">// The iName LString cleans up after itself automatically</span>
<a name="l00235"></a>00235 }
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="keyword">const</span> TDesC& Name()
<a name="l00238"></a>00238 {
<a name="l00239"></a>00239 <span class="comment">// We can just return an LString directly as a const TDesC</span>
<a name="l00240"></a>00240 <span class="keywordflow">return</span> iName;
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="keyword">protected</span>:
<a name="l00244"></a>00244 CStringUserSinglePhase(<span class="keyword">const</span> TDesC& aName)
<a name="l00245"></a>00245 <span class="comment">/*</span>
<a name="l00246"></a>00246 <span class="comment"> This initialization of iName may leave because LString</span>
<a name="l00247"></a>00247 <span class="comment"> needs to allocate a heap buffer to copy the aName string</span>
<a name="l00248"></a>00248 <span class="comment"> data into</span>
<a name="l00249"></a>00249 <span class="comment"> */</span>
<a name="l00250"></a>00250 : iName(aName)
<a name="l00251"></a>00251 {
<a name="l00252"></a>00252 <span class="comment">/*</span>
<a name="l00253"></a>00253 <span class="comment"> If iName initialization is successful but the constructor</span>
<a name="l00254"></a>00254 <span class="comment"> then goes on to leave later, iName (like all fields fully</span>
<a name="l00255"></a>00255 <span class="comment"> constructed at the point of a leave in a constructor) will</span>
<a name="l00256"></a>00256 <span class="comment"> be destructed, and so clean up after itself</span>
<a name="l00257"></a>00257 <span class="comment"> */</span>
<a name="l00258"></a>00258 MaybeLeave();
<a name="l00259"></a>00259 }
<a name="l00260"></a>00260
<a name="l00261"></a>00261 <span class="keyword">protected</span>:
<a name="l00262"></a>00262 LString iName;
<a name="l00263"></a>00263 };
<a name="l00264"></a>00264
<a name="l00265"></a>00265
<a name="l00266"></a>00266 <span class="keywordtype">void</span> WalkthroughStringsL()
<a name="l00267"></a>00267 {
<a name="l00268"></a>00268 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtOption1,<span class="stringliteral">"Option1: String handling using EUser high level library\n"</span>);
<a name="l00269"></a>00269 gConsole->Printf(KTxtOption1);
<a name="l00270"></a>00270 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtFormatString,<span class="stringliteral">"String %d"</span>);
<a name="l00271"></a>00271 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPrintString,<span class="stringliteral">"String %d = %S\n"</span>);
<a name="l00272"></a>00272 {
<a name="l00273"></a>00273 <span class="comment">// Trivially exercise the LString using classes defined above</span>
<a name="l00274"></a>00274
<a name="l00275"></a>00275 LCleanedupPtr<CStringUserTwoPhase> one(CStringUserTwoPhase::NewL(KOne));
<a name="l00276"></a>00276 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtSinglePhaseConstructor,<span class="stringliteral">"Single phase name: %S\n"</span>);
<a name="l00277"></a>00277 gConsole->Printf(KTxtSinglePhaseConstructor, &one->Name());
<a name="l00278"></a>00278
<a name="l00279"></a>00279 LCleanedupPtr<CStringUserSinglePhase> two(CStringUserSinglePhase::NewL(KTwo));
<a name="l00280"></a>00280 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtTwoPhaseConstructor,<span class="stringliteral">"Single phase name: %S\n"</span>);
<a name="l00281"></a>00281 gConsole->Printf(KTxtTwoPhaseConstructor, &two->Name());
<a name="l00282"></a>00282
<a name="l00283"></a>00283 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l00284"></a>00284 gConsole->Getch();
<a name="l00285"></a>00285 <span class="comment">// Both instances are automatically deleted as we go out of scope</span>
<a name="l00286"></a>00286 }
<a name="l00287"></a>00287
<a name="l00288"></a>00288 {
<a name="l00289"></a>00289 <span class="comment">/*</span>
<a name="l00290"></a>00290 <span class="comment"> A default constructed LString starts empty, doesn't</span>
<a name="l00291"></a>00291 <span class="comment"> allocate any memory on the heap, and therefore the</span>
<a name="l00292"></a>00292 <span class="comment"> following cannot leave</span>
<a name="l00293"></a>00293 <span class="comment"> */</span>
<a name="l00294"></a>00294 LString s;
<a name="l00295"></a>00295
<a name="l00296"></a>00296 <span class="comment">/*</span>
<a name="l00297"></a>00297 <span class="comment"> But it will grow on demand if you assign to it, so it has</span>
<a name="l00298"></a>00298 <span class="comment"> enough space to hold the copied string data, and so</span>
<a name="l00299"></a>00299 <span class="comment"> assignment may leave</span>
<a name="l00300"></a>00300 <span class="comment"> */</span>
<a name="l00301"></a>00301 s = KOne;
<a name="l00302"></a>00302
<a name="l00303"></a>00303 <span class="comment">/*</span>
<a name="l00304"></a>00304 <span class="comment"> Similarly if you append to it with the leaving variant of</span>
<a name="l00305"></a>00305 <span class="comment"> Append(), AppendL(), if may grow on demand</span>
<a name="l00306"></a>00306 <span class="comment"> */</span>
<a name="l00307"></a>00307 s.AppendL(KTwo);
<a name="l00308"></a>00308
<a name="l00309"></a>00309 <span class="comment">// The += operator for LString also maps to AppendL()</span>
<a name="l00310"></a>00310 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KThree, <span class="stringliteral">"Three "</span>);
<a name="l00311"></a>00311 s += KThree;
<a name="l00312"></a>00312
<a name="l00313"></a>00313 <span class="comment">/*</span>
<a name="l00314"></a>00314 <span class="comment"> You can also use new leaving format methods that also grow</span>
<a name="l00315"></a>00315 <span class="comment"> on demand</span>
<a name="l00316"></a>00316 <span class="comment"> */</span>
<a name="l00317"></a>00317 s.AppendFormatL(KTesting);
<a name="l00318"></a>00318
<a name="l00319"></a>00319 <span class="comment">/*</span>
<a name="l00320"></a>00320 <span class="comment"> This general style of use of LString may be preferable to</span>
<a name="l00321"></a>00321 <span class="comment"> typical descriptor use for a number of reasons e.g. it</span>
<a name="l00322"></a>00322 <span class="comment"> avoids the common temptation to set an artificial maximum</span>
<a name="l00323"></a>00323 <span class="comment"> buffer size; it avoids massive conservative over-allocation</span>
<a name="l00324"></a>00324 <span class="comment"> when the average case length of a string is far less than</span>
<a name="l00325"></a>00325 <span class="comment"> the worst-case maximum; it will not surprise you (compared</span>
<a name="l00326"></a>00326 <span class="comment"> to the alternative of a large stack-allocated TBuf) by</span>
<a name="l00327"></a>00327 <span class="comment"> triggering stack overflow.</span>
<a name="l00328"></a>00328 <span class="comment"> */</span>
<a name="l00329"></a>00329
<a name="l00330"></a>00330 <span class="comment">// An LString can be printed the same way as any descriptor</span>
<a name="l00331"></a>00331 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtValue,<span class="stringliteral">"Value: %S\n"</span>);
<a name="l00332"></a>00332 gConsole->Printf(KTxtValue, &s);
<a name="l00333"></a>00333
<a name="l00334"></a>00334 <span class="comment">// An LString can be compared the same way as any descriptor</span>
<a name="l00335"></a>00335 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtLStringCompare,<span class="stringliteral">" Comparing LString with a literal is successful\n"</span>);
<a name="l00336"></a>00336 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KPhrase, <span class="stringliteral">"One Two Three Testing "</span>);
<a name="l00337"></a>00337 <span class="keywordflow">if</span>(s == KPhrase)
<a name="l00338"></a>00338 {
<a name="l00339"></a>00339 gConsole->Printf(KTxtLStringCompare);
<a name="l00340"></a>00340 }
<a name="l00341"></a>00341
<a name="l00342"></a>00342 <span class="comment">// An LString supports all TDesC and TDes methods</span>
<a name="l00343"></a>00343 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtLStringSupportedAPI1,<span class="stringliteral">"LString supports TDesC and TDes methods\n"</span>);
<a name="l00344"></a>00344 <span class="keywordflow">if</span>(s.Find(KTwo) == 4)
<a name="l00345"></a>00345 {
<a name="l00346"></a>00346 gConsole->Printf(KTxtLStringSupportedAPI1);
<a name="l00347"></a>00347 }
<a name="l00348"></a>00348 <span class="comment">// An LString supports all TDesC and TDes operators</span>
<a name="l00349"></a>00349 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtLStringSupportedAPI2,<span class="stringliteral">"LString supports TDesC and TDes operators\n"</span>);
<a name="l00350"></a>00350 <span class="keywordflow">if</span>(s[4] == TChar(<span class="charliteral">'T'</span>))
<a name="l00351"></a>00351 {
<a name="l00352"></a>00352 gConsole->Printf(KTxtLStringSupportedAPI2);
<a name="l00353"></a>00353 }
<a name="l00354"></a>00354 TInt untrimmed = s.Length();
<a name="l00355"></a>00355 s.Trim();
<a name="l00356"></a>00356 <span class="keywordflow">if</span>(s.Length() == untrimmed - 1)
<a name="l00357"></a>00357 {
<a name="l00358"></a>00358 <span class="comment">//LString supports Trim API</span>
<a name="l00359"></a>00359 }
<a name="l00360"></a>00360
<a name="l00361"></a>00361 s.UpperCase();
<a name="l00362"></a>00362 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPrintUpperCase,<span class="stringliteral">"UpperCase: %S\n"</span>);
<a name="l00363"></a>00363 gConsole->Printf(KTxtPrintUpperCase, &s);
<a name="l00364"></a>00364 s.LowerCase();
<a name="l00365"></a>00365 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPrintLowerCase,<span class="stringliteral">"UpperCase: %S\n"</span>);
<a name="l00366"></a>00366 gConsole->Printf(KTxtPrintLowerCase, &s);
<a name="l00367"></a>00367 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l00368"></a>00368 gConsole->Getch();
<a name="l00369"></a>00369 <span class="comment">/*</span>
<a name="l00370"></a>00370 <span class="comment"> The underlying heap allocated buffer is released</span>
<a name="l00371"></a>00371 <span class="comment"> automatically when the LString goes out of scope, either</span>
<a name="l00372"></a>00372 <span class="comment"> normally or through a leave</span>
<a name="l00373"></a>00373 <span class="comment"> */</span>
<a name="l00374"></a>00374 }
<a name="l00375"></a>00375
<a name="l00376"></a>00376 {
<a name="l00377"></a>00377 <span class="comment">// You can initialize with a MaxLength value</span>
<a name="l00378"></a>00378 LString s(KMaxFileName); <span class="comment">// This operation may leave</span>
<a name="l00379"></a>00379 <span class="keywordflow">if</span>(s.MaxLength() == KMaxFileName)
<a name="l00380"></a>00380 {
<a name="l00381"></a>00381 <span class="comment">//LString supports MaxLength API</span>
<a name="l00382"></a>00382 }
<a name="l00383"></a>00383
<a name="l00384"></a>00384 <span class="comment">/*</span>
<a name="l00385"></a>00385 <span class="comment"> And you can dynamically adjust MaxLength later using </span>
<a name="l00386"></a>00386 <span class="comment"> SetMaxLengthL() if you want an exact allocated size.</span>
<a name="l00387"></a>00387 <span class="comment"> Setting MaxLength() on construction or via SetMaxLengthL() is</span>
<a name="l00388"></a>00388 <span class="comment"> exact; calling MaxLength() immediately afterwards is</span>
<a name="l00389"></a>00389 <span class="comment"> guaranteed to return exactly the value you specified.</span>
<a name="l00390"></a>00390 <span class="comment"> */</span>
<a name="l00391"></a>00391 s.SetMaxLengthL(2 * KMaxFileName);
<a name="l00392"></a>00392 <span class="keywordflow">if</span>(s.MaxLength() == 2 * KMaxFileName)
<a name="l00393"></a>00393 {
<a name="l00394"></a>00394 <span class="comment">//MaxLength is successfully adjusted.</span>
<a name="l00395"></a>00395 }
<a name="l00396"></a>00396
<a name="l00397"></a>00397 <span class="comment">/*</span>
<a name="l00398"></a>00398 <span class="comment"> Pre-setting MaxLength is important when passing an LString</span>
<a name="l00399"></a>00399 <span class="comment"> as a TDes to a library function, because the LString can't</span>
<a name="l00400"></a>00400 <span class="comment"> be auto-grown via the TDes API.</span>
<a name="l00401"></a>00401 <span class="comment"> */</span>
<a name="l00402"></a>00402
<a name="l00403"></a>00403 }
<a name="l00404"></a>00404
<a name="l00405"></a>00405 {
<a name="l00406"></a>00406 <span class="comment">/*</span>
<a name="l00407"></a>00407 <span class="comment"> You can initialize from any descriptor (or literal) and the</span>
<a name="l00408"></a>00408 <span class="comment"> string data is copied into the LString</span>
<a name="l00409"></a>00409 <span class="comment"> */</span>
<a name="l00410"></a>00410 LString s(KOne); <span class="comment">// From a literal</span>
<a name="l00411"></a>00411 s += KTwo;
<a name="l00412"></a>00412 LString half(s.Left(s.Length() / 2)); <span class="comment">// Left returns a TPtrC</span>
<a name="l00413"></a>00413 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPrintAllandHalf,<span class="stringliteral">"All: %S, Half: %S\n"</span>);
<a name="l00414"></a>00414 gConsole->Printf(KTxtPrintAllandHalf, &s, &half);
<a name="l00415"></a>00415
<a name="l00416"></a>00416 <span class="comment">/*</span>
<a name="l00417"></a>00417 <span class="comment"> On the other hand, you can initialize from a returned</span>
<a name="l00418"></a>00418 <span class="comment"> HBufC* and the LString automatically takes ownership</span>
<a name="l00419"></a>00419 <span class="comment"> */</span>
<a name="l00420"></a>00420 LString own(AllocateNameL(KTesting));
<a name="l00421"></a>00421 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtOwnedString,<span class="stringliteral">"What I own: %S\n"</span>);
<a name="l00422"></a>00422 gConsole->Printf(KTxtOwnedString, &own);
<a name="l00423"></a>00423
<a name="l00424"></a>00424 <span class="comment">/*</span>
<a name="l00425"></a>00425 <span class="comment"> Following that you can re-assign an HBufC to an existing</span>
<a name="l00426"></a>00426 <span class="comment"> string using the assignment operator </span>
<a name="l00427"></a>00427 <span class="comment"> taking ownership of the new content. </span>
<a name="l00428"></a>00428 <span class="comment"> */</span>
<a name="l00429"></a>00429 own = AllocateNameL(KTesting);
<a name="l00430"></a>00430
<a name="l00431"></a>00431 <span class="comment">/*</span>
<a name="l00432"></a>00432 <span class="comment"> Following that you can re-assign an HBufC to an existing</span>
<a name="l00433"></a>00433 <span class="comment"> string. The string destroys its original content before</span>
<a name="l00434"></a>00434 <span class="comment"> taking ownership of the new content. </span>
<a name="l00435"></a>00435 <span class="comment"> */</span>
<a name="l00436"></a>00436 own.Assign(AllocateNameL(KTesting));
<a name="l00437"></a>00437
<a name="l00438"></a>00438 <span class="comment">/*</span>
<a name="l00439"></a>00439 <span class="comment"> The content of one string can similarly be assigned</span>
<a name="l00440"></a>00440 <span class="comment"> to another to avoid copying. In this example, the content </span>
<a name="l00441"></a>00441 <span class="comment"> is detached from 's' and transfered to 'own'.</span>
<a name="l00442"></a>00442 <span class="comment"> */</span>
<a name="l00443"></a>00443 own.Assign(s);
<a name="l00444"></a>00444
<a name="l00445"></a>00445 <span class="comment">/*</span>
<a name="l00446"></a>00446 <span class="comment"> The same content transfer can be achieved from an RBuf to a</span>
<a name="l00447"></a>00447 <span class="comment"> string. You may need to do this if a legacy method returns</span>
<a name="l00448"></a>00448 <span class="comment"> you an RBuf. The RBuf is emptied of its content.</span>
<a name="l00449"></a>00449 <span class="comment"> */</span>
<a name="l00450"></a>00450 RBuf16 buf;
<a name="l00451"></a>00451 buf.CreateL(KOne);
<a name="l00452"></a>00452 own.Assign(buf);
<a name="l00453"></a>00453
<a name="l00454"></a>00454 <span class="comment">/*</span>
<a name="l00455"></a>00455 <span class="comment"> You can also assign a simple text array to a string as its</span>
<a name="l00456"></a>00456 <span class="comment"> new buffer. This method initialises the length to zero.</span>
<a name="l00457"></a>00457 <span class="comment"> */</span>
<a name="l00458"></a>00458 own.Assign((TText*)User::Alloc(24*(TInt)<span class="keyword">sizeof</span>(TText)), 24);
<a name="l00459"></a>00459
<a name="l00460"></a>00460 <span class="comment">/*</span>
<a name="l00461"></a>00461 <span class="comment"> If the buffer has already been filled with some characters</span>
<a name="l00462"></a>00462 <span class="comment"> then you supply the length in this alternative Assign() method.</span>
<a name="l00463"></a>00463 <span class="comment"> */</span>
<a name="l00464"></a>00464 own.Assign((TText*)User::Alloc(24*(TInt)<span class="keyword">sizeof</span>(TText)), 12,24);
<a name="l00465"></a>00465 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l00466"></a>00466 gConsole->Getch();
<a name="l00467"></a>00467 <span class="comment">/*</span>
<a name="l00468"></a>00468 <span class="comment"> Each Assign() destroys the old content before assuming ownership</span>
<a name="l00469"></a>00469 <span class="comment"> of the new.</span>
<a name="l00470"></a>00470 <span class="comment"> As usual the last content of the string is destroyed when the </span>
<a name="l00471"></a>00471 <span class="comment"> LString goes out of scope</span>
<a name="l00472"></a>00472 <span class="comment"> */</span>
<a name="l00473"></a>00473 }
<a name="l00474"></a>00474
<a name="l00475"></a>00475 {
<a name="l00476"></a>00476 <span class="comment">/*</span>
<a name="l00477"></a>00477 <span class="comment"> You can reserve extra free space in preparation for an </span>
<a name="l00478"></a>00478 <span class="comment"> operation that adds characters to the string. You may</span>
<a name="l00479"></a>00479 <span class="comment"> need to do this when you cannot use any of the auto-buffer</span>
<a name="l00480"></a>00480 <span class="comment"> extending LString methods to achieve your objective.</span>
<a name="l00481"></a>00481 <span class="comment"> */</span>
<a name="l00482"></a>00482 LString s(KOne);
<a name="l00483"></a>00483 s.ReserveFreeCapacityL(4);
<a name="l00484"></a>00484 <span class="keywordflow">if</span>(s.Length() == 4)
<a name="l00485"></a>00485 {
<a name="l00486"></a>00486 <span class="comment">//Length() API gives the current length of the string</span>
<a name="l00487"></a>00487 }
<a name="l00488"></a>00488 <span class="keywordflow">if</span>(s.MaxLength() >= 8)
<a name="l00489"></a>00489 {
<a name="l00490"></a>00490 <span class="comment">//MaxLength() gives the maximum length supported by the string</span>
<a name="l00491"></a>00491 }
<a name="l00492"></a>00492
<a name="l00493"></a>00493 <span class="comment">/*</span>
<a name="l00494"></a>00494 <span class="comment"> Almost all the methods that may extend the string buffer,</span>
<a name="l00495"></a>00495 <span class="comment"> including the explicit ReserveFreeCapacityL(), but excluding</span>
<a name="l00496"></a>00496 <span class="comment"> SetMaxLengthL(), attempt to grow the size exponentially. </span>
<a name="l00497"></a>00497 <span class="comment"> The exponential growth pattern is expected to give better </span>
<a name="l00498"></a>00498 <span class="comment"> performance at an amortised complexity of O(n) when adding n characters.</span>
<a name="l00499"></a>00499 <span class="comment"> If the exponential growth is less than the supplied extra size</span>
<a name="l00500"></a>00500 <span class="comment"> then the supplied size is used instead to save time.</span>
<a name="l00501"></a>00501 <span class="comment"> The exponential growth is used in anticipation of further additions</span>
<a name="l00502"></a>00502 <span class="comment"> to a string. This trades-off speed efficiency for space efficiency.</span>
<a name="l00503"></a>00503 <span class="comment"> If required you may be able to swap the oversized buffer for </span>
<a name="l00504"></a>00504 <span class="comment"> a more compact one using:</span>
<a name="l00505"></a>00505 <span class="comment"> */</span>
<a name="l00506"></a>00506 s.Compress();
<a name="l00507"></a>00507 <span class="keywordflow">if</span>(s.MaxLength() >= 4)
<a name="l00508"></a>00508 {
<a name="l00509"></a>00509 <span class="comment">//Compress() API is used to compress the unused memory.</span>
<a name="l00510"></a>00510 }
<a name="l00511"></a>00511
<a name="l00512"></a>00512 <span class="comment">/*</span>
<a name="l00513"></a>00513 <span class="comment"> Resize() attempts to re-allocate a smaller buffer to copy</span>
<a name="l00514"></a>00514 <span class="comment"> the content into. If the new memory cannot be allocated then the</span>
<a name="l00515"></a>00515 <span class="comment"> original string is left unaffected. </span>
<a name="l00516"></a>00516 <span class="comment"> </span>
<a name="l00517"></a>00517 <span class="comment"> When you have finished using the content of a string you can</span>
<a name="l00518"></a>00518 <span class="comment"> get its buffer released without destroying the string itself. </span>
<a name="l00519"></a>00519 <span class="comment"> You may want to do this when using member declared strings.</span>
<a name="l00520"></a>00520 <span class="comment"> Automatic strings are destroyed when they go out of scope.</span>
<a name="l00521"></a>00521 <span class="comment"> */</span>
<a name="l00522"></a>00522 s.Reset();
<a name="l00523"></a>00523 <span class="keywordflow">if</span>(s.Length() == 0)
<a name="l00524"></a>00524 {
<a name="l00525"></a>00525 <span class="comment">//Buffer of the string is released, hence length is zero.</span>
<a name="l00526"></a>00526 }
<a name="l00527"></a>00527 <span class="keywordflow">if</span>(s.MaxLength() == 0)
<a name="l00528"></a>00528 {
<a name="l00529"></a>00529 <span class="comment">//Buffer of the string is released, hence maximum length is zero.</span>
<a name="l00530"></a>00530 }
<a name="l00531"></a>00531
<a name="l00532"></a>00532 }
<a name="l00533"></a>00533
<a name="l00534"></a>00534 {
<a name="l00535"></a>00535 <span class="comment">/*</span>
<a name="l00536"></a>00536 <span class="comment"> An LString can be passed directly to any function requiring</span>
<a name="l00537"></a>00537 <span class="comment"> a const TDesC&</span>
<a name="l00538"></a>00538 <span class="comment"> */</span>
<a name="l00539"></a>00539 TInt year = 2009;
<a name="l00540"></a>00540
<a name="l00541"></a>00541 LString s;
<a name="l00542"></a>00542 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtFormatYear1,<span class="stringliteral">"Happy New Year %d"</span>);
<a name="l00543"></a>00543 s.FormatL(KTxtFormatYear1, year);
<a name="l00544"></a>00544 <span class="comment">// InfoPrint() takes a const TDesC&</span>
<a name="l00545"></a>00545 User::InfoPrint(s);
<a name="l00546"></a>00546
<a name="l00547"></a>00547 LString pattern;
<a name="l00548"></a>00548 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtFormatYear2,<span class="stringliteral">"*Year %d"</span>);
<a name="l00549"></a>00549 pattern.FormatL(KTxtFormatYear2, year);
<a name="l00550"></a>00550 <span class="comment">// Match() takes a const TDesC& as a pattern</span>
<a name="l00551"></a>00551 TInt loc = s.Match(pattern);
<a name="l00552"></a>00552 <span class="keywordflow">if</span>(loc == 10)
<a name="l00553"></a>00553 {
<a name="l00554"></a>00554 <span class="comment">//Match() API is demonstrated successfully.</span>
<a name="l00555"></a>00555 }
<a name="l00556"></a>00556 }
<a name="l00557"></a>00557
<a name="l00558"></a>00558 {
<a name="l00559"></a>00559 <span class="comment">/*</span>
<a name="l00560"></a>00560 <span class="comment"> An LString can be passed directly to any function requiring</span>
<a name="l00561"></a>00561 <span class="comment"> a TDes& but care must always be taken to pre-set MaxLength()</span>
<a name="l00562"></a>00562 <span class="comment"> since LStrings can't be automatically grown via the TDes</span>
<a name="l00563"></a>00563 <span class="comment"> interface</span>
<a name="l00564"></a>00564 <span class="comment"> */</span>
<a name="l00565"></a>00565
<a name="l00566"></a>00566 LString s;
<a name="l00567"></a>00567 <span class="comment">/*</span>
<a name="l00568"></a>00568 <span class="comment"> Calling GetCurrentPath(s) now would panic because LStrings</span>
<a name="l00569"></a>00569 <span class="comment"> are initialized by default to MaxLength 0. Although s is</span>
<a name="l00570"></a>00570 <span class="comment"> an LString GetCurrentPath() takes a TDes& and so inside the function</span>
<a name="l00571"></a>00571 <span class="comment"> 's' behaves as a TDes and would panic with USER 11 if the resulting </span>
<a name="l00572"></a>00572 <span class="comment"> new length of s is greater than its maximum length.</span>
<a name="l00573"></a>00573 <span class="comment"> */</span>
<a name="l00574"></a>00574 <span class="keywordflow">if</span>(s.MaxLength() == 0)
<a name="l00575"></a>00575 {
<a name="l00576"></a>00576 <span class="comment">//LStrings are initialized by default to MaxLength 0</span>
<a name="l00577"></a>00577 }
<a name="l00578"></a>00578
<a name="l00579"></a>00579 <span class="comment">/*</span>
<a name="l00580"></a>00580 <span class="comment"> Calling SetMaxLengthL() will automatically realloc the</span>
<a name="l00581"></a>00581 <span class="comment"> underlying buffer if required, and is guaranteed to leave</span>
<a name="l00582"></a>00582 <span class="comment"> MaxLength() equal to the specified value</span>
<a name="l00583"></a>00583 <span class="comment"> */</span>
<a name="l00584"></a>00584 s.SetMaxLengthL(KMaxFileName);
<a name="l00585"></a>00585 GetCurrentPath(s);
<a name="l00586"></a>00586 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPrintPath,<span class="stringliteral">"Path: %S\n"</span>);
<a name="l00587"></a>00587 gConsole->Printf(KTxtPrintPath, &s);
<a name="l00588"></a>00588 <span class="keywordflow">if</span>(s == KPath)
<a name="l00589"></a>00589 {
<a name="l00590"></a>00590 <span class="comment">//String comparison is successful</span>
<a name="l00591"></a>00591 }
<a name="l00592"></a>00592
<a name="l00593"></a>00593 <span class="comment">/*</span>
<a name="l00594"></a>00594 <span class="comment"> If SetMaxLengthL() adjusts MaxLength() to be lower than the current</span>
<a name="l00595"></a>00595 <span class="comment"> Length(), the data is truncated to the new MaxLength() and</span>
<a name="l00596"></a>00596 <span class="comment"> Length() set to the new MaxLength().</span>
<a name="l00597"></a>00597 <span class="comment"> */</span>
<a name="l00598"></a>00598 s.SetMaxLengthL(s.Length() / 2);
<a name="l00599"></a>00599 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtTruncatedPath,<span class="stringliteral">"Truncated path: %S\n"</span>);
<a name="l00600"></a>00600 gConsole->Printf(KTxtTruncatedPath, &s);
<a name="l00601"></a>00601 <span class="keywordflow">if</span>(s.Length() == s.MaxLength())
<a name="l00602"></a>00602 {
<a name="l00603"></a>00603 <span class="comment">//String comparison is successful</span>
<a name="l00604"></a>00604 }
<a name="l00605"></a>00605
<a name="l00606"></a>00606 <span class="comment">/*</span>
<a name="l00607"></a>00607 <span class="comment"> An initial MaxLength() can be specified when constructing an</span>
<a name="l00608"></a>00608 <span class="comment"> LString. Note that unlike the default constructor, this</span>
<a name="l00609"></a>00609 <span class="comment"> variant allocates and may leave.</span>
<a name="l00610"></a>00610 <span class="comment"> */</span>
<a name="l00611"></a>00611 LString s2(KMaxFileName);
<a name="l00612"></a>00612 GetCurrentPath(s2);
<a name="l00613"></a>00613 gConsole->Printf(KTxtPrintPath, &s2);
<a name="l00614"></a>00614 <span class="keywordflow">if</span>(s2 == KPath)
<a name="l00615"></a>00615 {
<a name="l00616"></a>00616 <span class="comment">//String comparison is successful</span>
<a name="l00617"></a>00617 }
<a name="l00618"></a>00618
<a name="l00619"></a>00619 <span class="comment">/*</span>
<a name="l00620"></a>00620 <span class="comment"> Your code and APIs can benefit from LString's auto-growth</span>
<a name="l00621"></a>00621 <span class="comment"> behaviour by accepting an LString to fill in as an output</span>
<a name="l00622"></a>00622 <span class="comment"> parameter. Using LString rather than TDes parameters means </span>
<a name="l00623"></a>00623 <span class="comment"> that the function is able to safely increase the size of the </span>
<a name="l00624"></a>00624 <span class="comment"> string as the LString will re-allocate as necessary</span>
<a name="l00625"></a>00625 <span class="comment"> */</span>
<a name="l00626"></a>00626 LString s3;
<a name="l00627"></a>00627 <span class="comment">// GetCurrentPathString() takes an LString&</span>
<a name="l00628"></a>00628 GetCurrentPathString(s3);
<a name="l00629"></a>00629 gConsole->Printf(KTxtPrintPath, &s3);
<a name="l00630"></a>00630 <span class="keywordflow">if</span>(s3 == KPath)
<a name="l00631"></a>00631 {
<a name="l00632"></a>00632 <span class="comment">//String comparison is successful</span>
<a name="l00633"></a>00633 }
<a name="l00634"></a>00634
<a name="l00635"></a>00635 <span class="comment">/*</span>
<a name="l00636"></a>00636 <span class="comment"> As a well-defined value class, if you want to, LStrings can</span>
<a name="l00637"></a>00637 <span class="comment"> be passed and returned by value. This is relatively</span>
<a name="l00638"></a>00638 <span class="comment"> inefficient however due to the amount of copying and heap</span>
<a name="l00639"></a>00639 <span class="comment"> reallocation involved. </span>
<a name="l00640"></a>00640 <span class="comment"> */</span>
<a name="l00641"></a>00641 LString s4(AppendCurrentPathStringL(s3));
<a name="l00642"></a>00642 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtAppendedPath,<span class="stringliteral">"Appended path: %S\n"</span>);
<a name="l00643"></a>00643 gConsole->Printf(KTxtAppendedPath, &s4);
<a name="l00644"></a>00644 <span class="keywordflow">if</span>(s4.Length() == s3.Length() * 2)
<a name="l00645"></a>00645 {
<a name="l00646"></a>00646 <span class="comment">//String comparison is successful</span>
<a name="l00647"></a>00647 }
<a name="l00648"></a>00648 }
<a name="l00649"></a>00649
<a name="l00650"></a>00650 {
<a name="l00651"></a>00651 <span class="comment">/*</span>
<a name="l00652"></a>00652 <span class="comment"> LStrings can be allocated on the heap if necessary. </span>
<a name="l00653"></a>00653 <span class="comment"> Then it can managed as part of an array of string pointers.</span>
<a name="l00654"></a>00654 <span class="comment"> */</span>
<a name="l00655"></a>00655 TInt n = 5;
<a name="l00656"></a>00656 LCleanedupHandle<RPointerArray<LString>, TResetAndDestroy> sarray;
<a name="l00657"></a>00657
<a name="l00658"></a>00658 <span class="keywordflow">for</span> (TInt i = 0; i < n; ++i)
<a name="l00659"></a>00659 {
<a name="l00660"></a>00660 LString* s = <span class="keyword">new</span>(ELeave) LString;
<a name="l00661"></a>00661 s->FormatL(KTxtFormatString, i);
<a name="l00662"></a>00662 sarray->Append(s);
<a name="l00663"></a>00663 }
<a name="l00664"></a>00664
<a name="l00665"></a>00665 <span class="keywordflow">for</span> (TInt i = 0, n = sarray->Count(); i < n; ++i)
<a name="l00666"></a>00666 {
<a name="l00667"></a>00667 LString tmp;
<a name="l00668"></a>00668 tmp.FormatL(KTxtFormatString, i);
<a name="l00669"></a>00669 <span class="keywordflow">if</span>(tmp == *(*sarray)[i])
<a name="l00670"></a>00670 {
<a name="l00671"></a>00671
<a name="l00672"></a>00672 }
<a name="l00673"></a>00673 gConsole->Printf(KTxtPrintString, i, (*sarray)[i]);
<a name="l00674"></a>00674 }
<a name="l00675"></a>00675
<a name="l00676"></a>00676 }
<a name="l00677"></a>00677
<a name="l00678"></a>00678 {
<a name="l00679"></a>00679 <span class="comment">/*</span>
<a name="l00680"></a>00680 <span class="comment"> Any allocation failure in new(ELeave)LString throws</span>
<a name="l00681"></a>00681 <span class="comment"> KErrNoMemory and cleans up fully after itself.</span>
<a name="l00682"></a>00682 <span class="comment"> */</span>
<a name="l00683"></a>00683
<a name="l00684"></a>00684 __UHEAP_MARK;
<a name="l00685"></a>00685 TRAPD(status, <span class="keyword">new</span>(ELeave) LString(100 * 1024 * 1024));
<a name="l00686"></a>00686 <span class="keywordflow">if</span>(status == KErrNoMemory)
<a name="l00687"></a>00687 {
<a name="l00688"></a>00688 <span class="comment">//cleans up after itself fully, there is no need to take any further action.</span>
<a name="l00689"></a>00689 }
<a name="l00690"></a>00690 __UHEAP_MARKEND;
<a name="l00691"></a>00691 }
<a name="l00692"></a>00692
<a name="l00693"></a>00693 {
<a name="l00694"></a>00694 <span class="comment">/*</span>
<a name="l00695"></a>00695 <span class="comment"> Native C arrays (both heap and stack allocated) of LStrings</span>
<a name="l00696"></a>00696 <span class="comment"> also work, although their use is not recommended.</span>
<a name="l00697"></a>00697 <span class="comment"> */</span>
<a name="l00698"></a>00698
<a name="l00699"></a>00699 TInt n = 5;
<a name="l00700"></a>00700 LCleanedupArray<LString> sarray(<span class="keyword">new</span>(ELeave) LString[n]);
<a name="l00701"></a>00701
<a name="l00702"></a>00702 <span class="keywordflow">for</span> (TInt i = 0; i < n; ++i)
<a name="l00703"></a>00703 {
<a name="l00704"></a>00704 sarray[i].FormatL(KTxtFormatString, i);
<a name="l00705"></a>00705 }
<a name="l00706"></a>00706
<a name="l00707"></a>00707 <span class="keywordflow">for</span> (TInt i = 0; i < n; ++i)
<a name="l00708"></a>00708 {
<a name="l00709"></a>00709 LString tmp;
<a name="l00710"></a>00710 tmp.FormatL(KTxtFormatString, i);
<a name="l00711"></a>00711 <span class="keywordflow">if</span>(tmp == sarray[i])
<a name="l00712"></a>00712 {
<a name="l00713"></a>00713 <span class="comment">//comparison of strings is successful</span>
<a name="l00714"></a>00714 }
<a name="l00715"></a>00715 gConsole->Printf(KTxtPrintString, i, &sarray[i]);
<a name="l00716"></a>00716 }
<a name="l00717"></a>00717
<a name="l00718"></a>00718 }
<a name="l00719"></a>00719
<a name="l00720"></a>00720 }
<a name="l00721"></a>00721
<a name="l00727"></a>00727 <span class="keyword">class </span>CManagedUserTwoPhase : <span class="keyword">public</span> CBase
<a name="l00728"></a>00728 {
<a name="l00729"></a>00729 <span class="keyword">public</span>:
<a name="l00730"></a>00730 <span class="keyword">static</span> CManagedUserTwoPhase* NewL(CTicker* aTicker)
<a name="l00731"></a>00731 {
<a name="l00732"></a>00732 <span class="comment">/*</span>
<a name="l00733"></a>00733 <span class="comment"> We can use the resource management utility classes in</span>
<a name="l00734"></a>00734 <span class="comment"> two-phase if we want to.</span>
<a name="l00735"></a>00735 <span class="comment"> */</span>
<a name="l00736"></a>00736 LCleanedupPtr<CManagedUserTwoPhase> <span class="keyword">self</span>(<span class="keyword">new</span>(ELeave) CManagedUserTwoPhase);
<a name="l00737"></a>00737 <span class="keyword">self</span>->ConstructL(aTicker);
<a name="l00738"></a>00738 <span class="comment">/*</span>
<a name="l00739"></a>00739 <span class="comment"> Calling Unmanage() disables cleanup and yields the</span>
<a name="l00740"></a>00740 <span class="comment"> previously managed pointer so that it can be safely</span>
<a name="l00741"></a>00741 <span class="comment"> returned.</span>
<a name="l00742"></a>00742 <span class="comment"> */</span>
<a name="l00743"></a>00743 <span class="keywordflow">return</span> <span class="keyword">self</span>.Unmanage();
<a name="l00744"></a>00744 }
<a name="l00745"></a>00745
<a name="l00746"></a>00746 ~CManagedUserTwoPhase()
<a name="l00747"></a>00747 {
<a name="l00748"></a>00748 <span class="comment">/*</span>
<a name="l00749"></a>00749 <span class="comment"> The iTicker manager will automatically delete the CTicker</span>
<a name="l00750"></a>00750 <span class="comment"> The iTimer manager will automatically Close() the RTimer.</span>
<a name="l00751"></a>00751 <span class="comment"> */</span>
<a name="l00752"></a>00752 }
<a name="l00753"></a>00753
<a name="l00754"></a>00754 CTicker& Ticker()
<a name="l00755"></a>00755 {
<a name="l00756"></a>00756 <span class="comment">// If we dereference the management object we get a CTicker&.</span>
<a name="l00757"></a>00757 <span class="keywordflow">return</span> *iTicker;
<a name="l00758"></a>00758 }
<a name="l00759"></a>00759
<a name="l00760"></a>00760 RTimer& Timer()
<a name="l00761"></a>00761 {
<a name="l00762"></a>00762 <span class="comment">// If we dereference the management object we get an RTimer&.</span>
<a name="l00763"></a>00763 <span class="keywordflow">return</span> *iTimer;
<a name="l00764"></a>00764 }
<a name="l00765"></a>00765
<a name="l00766"></a>00766 <span class="keyword">private</span>:
<a name="l00767"></a>00767
<a name="l00768"></a>00768 <span class="keyword">virtual</span> <span class="keywordtype">void</span> ConstructL(CTicker* aTicker)
<a name="l00769"></a>00769 {
<a name="l00770"></a>00770 <span class="comment">// Take ownership and manage aTicker.</span>
<a name="l00771"></a>00771 iTicker = aTicker;
<a name="l00772"></a>00772
<a name="l00773"></a>00773 <span class="comment">// Note use of -> to indirect through the management wrapper.</span>
<a name="l00774"></a>00774 iTimer->CreateLocal() OR_LEAVE;
<a name="l00775"></a>00775 }
<a name="l00776"></a>00776
<a name="l00777"></a>00777 CManagedUserTwoPhase()
<a name="l00778"></a>00778 {
<a name="l00779"></a>00779 <span class="comment">/*</span>
<a name="l00780"></a>00780 <span class="comment"> Everything interesting happens in ConstructL() in this</span>
<a name="l00781"></a>00781 <span class="comment"> version. </span>
<a name="l00782"></a>00782 <span class="comment"></span>
<a name="l00783"></a>00783 <span class="comment"> Default initialization of the iName LString does not</span>
<a name="l00784"></a>00784 <span class="comment"> allocate a heap buffer, and so cannot leave. As long as</span>
<a name="l00785"></a>00785 <span class="comment"> initialization is deferred to ConstructL(), LStrings can be</span>
<a name="l00786"></a>00786 <span class="comment"> used safely with two-phase construction.</span>
<a name="l00787"></a>00787 <span class="comment"> */</span>
<a name="l00788"></a>00788 }
<a name="l00789"></a>00789
<a name="l00790"></a>00790 <span class="keyword">private</span>:
<a name="l00791"></a>00791 <span class="comment">// We have to use LManagedXxx for fields, not LCleanedupXxx</span>
<a name="l00792"></a>00792 LManagedPtr<CTicker> iTicker;
<a name="l00793"></a>00793 LManagedHandle<RTimer> iTimer;
<a name="l00794"></a>00794 };
<a name="l00795"></a>00795
<a name="l00808"></a>00808 <span class="keyword">class </span>CManagedUserSinglePhase : <span class="keyword">public</span> CBase
<a name="l00809"></a>00809 {
<a name="l00810"></a>00810 <span class="keyword">public</span>:
<a name="l00811"></a>00811 <span class="comment">/*</span>
<a name="l00812"></a>00812 <span class="comment"> This macro is necessary to ensure cleanup is correctly handled</span>
<a name="l00813"></a>00813 <span class="comment"> in the event that a constructor may leave beneath a call to</span>
<a name="l00814"></a>00814 <span class="comment"> new(ELeave)</span>
<a name="l00815"></a>00815 <span class="comment"> */</span>
<a name="l00816"></a>00816 CONSTRUCTORS_MAY_LEAVE
<a name="l00817"></a>00817
<a name="l00818"></a>00818 <span class="keyword">static</span> CManagedUserSinglePhase* NewL(CTicker* aTicker)
<a name="l00819"></a>00819 {
<a name="l00820"></a>00820 <span class="keywordflow">return</span> <span class="keyword">new</span>(ELeave) CManagedUserSinglePhase(aTicker);
<a name="l00821"></a>00821 }
<a name="l00822"></a>00822
<a name="l00823"></a>00823 ~CManagedUserSinglePhase()
<a name="l00824"></a>00824 {
<a name="l00825"></a>00825 <span class="comment">/*</span>
<a name="l00826"></a>00826 <span class="comment"> The iTicker manager destructor will automatically Zap() the CTicker.</span>
<a name="l00827"></a>00827 <span class="comment"> The iTimer manager destructor will automatically Close() the RTimer.</span>
<a name="l00828"></a>00828 <span class="comment"> */</span>
<a name="l00829"></a>00829 }
<a name="l00830"></a>00830
<a name="l00831"></a>00831 CTicker& Ticker()
<a name="l00832"></a>00832 {
<a name="l00833"></a>00833 <span class="comment">// If we dereference the management object we get a CTicker&.</span>
<a name="l00834"></a>00834 <span class="keywordflow">return</span> *iTicker;
<a name="l00835"></a>00835 }
<a name="l00836"></a>00836
<a name="l00837"></a>00837 RTimer& Timer()
<a name="l00838"></a>00838 {
<a name="l00839"></a>00839 <span class="comment">// If we dereference the management object we get an RTimer&.</span>
<a name="l00840"></a>00840 <span class="keywordflow">return</span> *iTimer;
<a name="l00841"></a>00841 }
<a name="l00842"></a>00842
<a name="l00843"></a>00843 <span class="keyword">private</span>:
<a name="l00844"></a>00844 CManagedUserSinglePhase(CTicker* aTicker)
<a name="l00845"></a>00845 <span class="comment">/*</span>
<a name="l00846"></a>00846 <span class="comment"> Take ownership and manage aTicker. Note that initialization</span>
<a name="l00847"></a>00847 <span class="comment"> of the LManagedXxx classes does not actually leave, but</span>
<a name="l00848"></a>00848 <span class="comment"> initialization of the LCleanedupXxx classes can.</span>
<a name="l00849"></a>00849 <span class="comment"> */</span>
<a name="l00850"></a>00850 : iTicker(aTicker)
<a name="l00851"></a>00851 {
<a name="l00852"></a>00852 <span class="comment">/*</span>
<a name="l00853"></a>00853 <span class="comment"> If iTicker initialization is successful but the constructor</span>
<a name="l00854"></a>00854 <span class="comment"> then goes on to leave later, iTicker (like all fields fully</span>
<a name="l00855"></a>00855 <span class="comment"> constructed at the point of a leave in a constructor) will</span>
<a name="l00856"></a>00856 <span class="comment"> be destructed, and the manager will cleanup the CTicker.</span>
<a name="l00857"></a>00857 <span class="comment"></span>
<a name="l00858"></a>00858 <span class="comment"> Note use of -> to indirect through the management wrapper.</span>
<a name="l00859"></a>00859 <span class="comment"> */</span>
<a name="l00860"></a>00860 iTimer->CreateLocal();
<a name="l00861"></a>00861
<a name="l00862"></a>00862 <span class="comment">// Likewise if we leave here, both iTicker and iTimer will</span>
<a name="l00863"></a>00863 <span class="comment">// undergo managed cleanup.</span>
<a name="l00864"></a>00864 MaybeLeave();
<a name="l00865"></a>00865 }
<a name="l00866"></a>00866
<a name="l00867"></a>00867 <span class="keyword">private</span>:
<a name="l00868"></a>00868 <span class="comment">// We have to use LManagedXxx for fields, not LCleanedupXxx.</span>
<a name="l00869"></a>00869 LManagedPtr<CTicker, TTickerZapStrategy> iTicker;
<a name="l00870"></a>00870 LManagedHandle<RTimer> iTimer;
<a name="l00871"></a>00871 };
<a name="l00872"></a>00872
<a name="l00873"></a>00873 <span class="comment">//Class definition of trivial R-Class</span>
<a name="l00874"></a>00874 <span class="keyword">class </span>RSimple
<a name="l00875"></a>00875 {
<a name="l00876"></a>00876 <span class="keyword">public</span>:
<a name="l00877"></a>00877
<a name="l00878"></a>00878 RSimple(){iData = NULL;}
<a name="l00879"></a>00879
<a name="l00880"></a>00880 <span class="comment">//Open function sets value</span>
<a name="l00881"></a>00881 <span class="keywordtype">void</span> OpenL(TInt aValue)
<a name="l00882"></a>00882 {
<a name="l00883"></a>00883 iData = <span class="keyword">new</span>(ELeave) TInt(aValue);
<a name="l00884"></a>00884 }
<a name="l00885"></a>00885
<a name="l00886"></a>00886 <span class="comment">//Cleanup function – frees resource</span>
<a name="l00887"></a>00887 <span class="keywordtype">void</span> Close()
<a name="l00888"></a>00888 {
<a name="l00889"></a>00889 <span class="keyword">delete</span> iData;
<a name="l00890"></a>00890 iData = NULL;
<a name="l00891"></a>00891 }
<a name="l00892"></a>00892
<a name="l00893"></a>00893 <span class="comment">//Cleanup function – frees resource</span>
<a name="l00894"></a>00894 <span class="keywordtype">void</span> Free()
<a name="l00895"></a>00895 {
<a name="l00896"></a>00896 <span class="keyword">delete</span> iData;
<a name="l00897"></a>00897 iData = NULL;
<a name="l00898"></a>00898 }
<a name="l00899"></a>00899
<a name="l00900"></a>00900 <span class="comment">//Cleanup function – frees resource</span>
<a name="l00901"></a>00901 <span class="keywordtype">void</span> ReleaseData()
<a name="l00902"></a>00902 {
<a name="l00903"></a>00903 <span class="keyword">delete</span> iData;
<a name="l00904"></a>00904 iData = NULL;
<a name="l00905"></a>00905 }
<a name="l00906"></a>00906
<a name="l00907"></a>00907 <span class="comment">//static cleanup function – frees aRSimple resources</span>
<a name="l00908"></a>00908 <span class="keyword">static</span> <span class="keywordtype">void</span> Cleanup(TAny* aRSimple)
<a name="l00909"></a>00909 {
<a name="l00910"></a>00910 <span class="keyword">static_cast<</span>RSimple*<span class="keyword">></span>(aRSimple)->Close();
<a name="l00911"></a>00911 }
<a name="l00912"></a>00912
<a name="l00913"></a>00913
<a name="l00914"></a>00914 <span class="keyword">private</span>:
<a name="l00915"></a>00915 TInt* iData;
<a name="l00916"></a>00916
<a name="l00917"></a>00917 };
<a name="l00918"></a>00918
<a name="l00919"></a>00919
<a name="l00926"></a>00926 DEFINE_CLEANUP_FUNCTION(RSimple, ReleaseData);
<a name="l00927"></a>00927
<a name="l00928"></a>00928
<a name="l00929"></a>00929 <span class="keywordtype">void</span> WalkthroughManagedL()
<a name="l00930"></a>00930 {
<a name="l00931"></a>00931 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtOption2,<span class="stringliteral">"Option2: Object creation and resource management using EUser high level library\n"</span>);
<a name="l00932"></a>00932 gConsole->Printf(KTxtOption2);
<a name="l00933"></a>00933 {
<a name="l00934"></a>00934 <span class="comment">// Trivially exercise the manager-using classes defined above.</span>
<a name="l00935"></a>00935 CTicker* ticker1 = <span class="keyword">new</span>(ELeave) CTicker;
<a name="l00936"></a>00936 LCleanedupPtr<CManagedUserTwoPhase> one(CManagedUserTwoPhase::NewL(ticker1));
<a name="l00937"></a>00937 <span class="keywordflow">if</span>(&one->Ticker() == ticker1)
<a name="l00938"></a>00938 {
<a name="l00939"></a>00939 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtLCleanedupPtrDemo1,<span class="stringliteral">"Creating an instance of CTicker using LCleanedupPtr\n"</span>);
<a name="l00940"></a>00940 gConsole->Printf(KTxtLCleanedupPtrDemo1);
<a name="l00941"></a>00941 }
<a name="l00942"></a>00942 one->Timer().Cancel(); <span class="comment">// Just to check we can get at it</span>
<a name="l00943"></a>00943
<a name="l00944"></a>00944 CTicker* ticker2 = <span class="keyword">new</span>(ELeave) CTicker;
<a name="l00945"></a>00945 LCleanedupPtr<CManagedUserSinglePhase> two(CManagedUserSinglePhase::NewL(ticker2));
<a name="l00946"></a>00946 <span class="keywordflow">if</span>(&two->Ticker() == ticker2)
<a name="l00947"></a>00947 {
<a name="l00948"></a>00948 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtLCleanedupPtrDemo2,<span class="stringliteral">"Creating second instance of CTicker using LCleanedupPtr\n"</span>);
<a name="l00949"></a>00949 gConsole->Printf(KTxtLCleanedupPtrDemo2);
<a name="l00950"></a>00950 }
<a name="l00951"></a>00951 two->Timer().Cancel(); <span class="comment">// Just to check we can get at it</span>
<a name="l00952"></a>00952 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtLCleanedupPtr,<span class="stringliteral">"Both instances are automatically deleted as we go out of scope\n"</span>);
<a name="l00953"></a>00953 gConsole->Printf(KTxtLCleanedupPtr);
<a name="l00954"></a>00954 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l00955"></a>00955 gConsole->Getch();
<a name="l00956"></a>00956 }
<a name="l00957"></a>00957
<a name="l00958"></a>00958 <span class="comment">// Always use LCleanedupXxx for locals, not LManagedXxx</span>
<a name="l00959"></a>00959
<a name="l00960"></a>00960 {
<a name="l00961"></a>00961 <span class="comment">/*</span>
<a name="l00962"></a>00962 <span class="comment"> Behind the scenes the LCleanedupXxx constructors push a</span>
<a name="l00963"></a>00963 <span class="comment"> cleanup item onto the cleanup stack and so may leave. If</span>
<a name="l00964"></a>00964 <span class="comment"> there is a leave during construction, the supplied pointer</span>
<a name="l00965"></a>00965 <span class="comment"> will still get cleaned up.</span>
<a name="l00966"></a>00966 <span class="comment"> */</span>
<a name="l00967"></a>00967 LCleanedupPtr<CTicker> t(<span class="keyword">new</span>(ELeave) CTicker);
<a name="l00968"></a>00968
<a name="l00969"></a>00969 <span class="comment">/*</span>
<a name="l00970"></a>00970 <span class="comment"> We can access CTicker's members via the management object</span>
<a name="l00971"></a>00971 <span class="comment"> using -></span>
<a name="l00972"></a>00972 <span class="comment"> */</span>
<a name="l00973"></a>00973 t->Tick();
<a name="l00974"></a>00974 t->Tock();
<a name="l00975"></a>00975 <span class="keywordflow">if</span>(t->iTicks == t->iTocks)
<a name="l00976"></a>00976 {
<a name="l00977"></a>00977 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtLCleanedupPtrDemo3,<span class="stringliteral">"CTicker members access using LCleanedupPtr is successful\n"</span>);
<a name="l00978"></a>00978 gConsole->Printf(KTxtLCleanedupPtrDemo3);
<a name="l00979"></a>00979 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l00980"></a>00980 gConsole->Getch();
<a name="l00981"></a>00981 }
<a name="l00982"></a>00982
<a name="l00983"></a>00983 <span class="comment">/*</span>
<a name="l00984"></a>00984 <span class="comment"> We can get at a reference to the managed object using *</span>
<a name="l00985"></a>00985 <span class="comment"> when we need to, e.g. if we need to pass it to a function.</span>
<a name="l00986"></a>00986 <span class="comment"> */</span>
<a name="l00987"></a>00987 RegisterTicker(*t); <span class="comment">// Takes a CTicker&</span>
<a name="l00988"></a>00988
<a name="l00989"></a>00989 <span class="comment">/*</span>
<a name="l00990"></a>00990 <span class="comment"> If some unfriendly interface needs a pointer rather than a</span>
<a name="l00991"></a>00991 <span class="comment"> ref, we have a couple of options.</span>
<a name="l00992"></a>00992 <span class="comment"> */</span>
<a name="l00993"></a>00993 RegisterTickerPtr(&*t); <span class="comment">// Takes a CTicker*</span>
<a name="l00994"></a>00994 RegisterTickerPtr(t.Get()); <span class="comment">// Takes a CTicker*</span>
<a name="l00995"></a>00995
<a name="l00996"></a>00996 <span class="comment">/*</span>
<a name="l00997"></a>00997 <span class="comment"> Note the use of . in t.Get() above; this distinguishes</span>
<a name="l00998"></a>00998 <span class="comment"> operations on the managing type from operations on the</span>
<a name="l00999"></a>00999 <span class="comment"> managed object.</span>
<a name="l01000"></a>01000 <span class="comment"> </span>
<a name="l01001"></a>01001 <span class="comment"> When the management object goes out of scope, either</span>
<a name="l01002"></a>01002 <span class="comment"> normally or as the result of a leave, the managed object is</span>
<a name="l01003"></a>01003 <span class="comment"> automatically deleted.</span>
<a name="l01004"></a>01004 <span class="comment"> */</span>
<a name="l01005"></a>01005 }
<a name="l01006"></a>01006
<a name="l01007"></a>01007 {
<a name="l01008"></a>01008 <span class="comment">/*</span>
<a name="l01009"></a>01009 <span class="comment"> Sometimes you need to protect something temporarily before</span>
<a name="l01010"></a>01010 <span class="comment"> transferring ownership e.g. by returning the pointer or</span>
<a name="l01011"></a>01011 <span class="comment"> passing it to a function that takes ownership.</span>
<a name="l01012"></a>01012 <span class="comment"> */</span>
<a name="l01013"></a>01013
<a name="l01014"></a>01014 LCleanedupPtr<CTicker> t(<span class="keyword">new</span>(ELeave) CTicker);
<a name="l01015"></a>01015
<a name="l01016"></a>01016 <span class="comment">// Protected while we do this</span>
<a name="l01017"></a>01017 MaybeLeave();
<a name="l01018"></a>01018
<a name="l01019"></a>01019 <span class="comment">/*</span>
<a name="l01020"></a>01020 <span class="comment"> But now we want to hand it off, so we use Unmanage() to</span>
<a name="l01021"></a>01021 <span class="comment"> both return a pointer and break the management link</span>
<a name="l01022"></a>01022 <span class="comment"> */</span>
<a name="l01023"></a>01023 TakeTickerOwnership(t.Unmanage());
<a name="l01024"></a>01024
<a name="l01025"></a>01025 <span class="comment">/*</span>
<a name="l01026"></a>01026 <span class="comment"> Now when it goes out of scope, no cleanup action is</span>
<a name="l01027"></a>01027 <span class="comment"> performed.</span>
<a name="l01028"></a>01028 <span class="comment"> */</span>
<a name="l01029"></a>01029 }
<a name="l01030"></a>01030
<a name="l01031"></a>01031 {
<a name="l01032"></a>01032 <span class="comment">/*</span>
<a name="l01033"></a>01033 <span class="comment"> If needed, it is possible to reuse a manager by using = to</span>
<a name="l01034"></a>01034 <span class="comment"> assign it a new managed object.</span>
<a name="l01035"></a>01035 <span class="comment"> */</span>
<a name="l01036"></a>01036
<a name="l01037"></a>01037 <span class="comment">// Not managing anything to start with</span>
<a name="l01038"></a>01038 LCleanedupPtr<CTicker> t;
<a name="l01039"></a>01039 <span class="keywordflow">if</span>(t.Get() == NULL)
<a name="l01040"></a>01040 {
<a name="l01041"></a>01041 <span class="comment">//Successfully initialised to NULL</span>
<a name="l01042"></a>01042 }
<a name="l01043"></a>01043 <span class="keywordflow">if</span>(&*t == NULL)
<a name="l01044"></a>01044 {
<a name="l01045"></a>01045 <span class="comment">//CTicker* value is also NULL</span>
<a name="l01046"></a>01046 }
<a name="l01047"></a>01047
<a name="l01048"></a>01048 <span class="keywordflow">for</span> (TInt i = 0; i < 10; ++i)
<a name="l01049"></a>01049 {
<a name="l01050"></a>01050 <span class="comment">/*</span>
<a name="l01051"></a>01051 <span class="comment"> If an object is already being managed, it is cleaned up</span>
<a name="l01052"></a>01052 <span class="comment"> before taking ownership of the new object.</span>
<a name="l01053"></a>01053 <span class="comment"> */</span>
<a name="l01054"></a>01054 t = <span class="keyword">new</span>(ELeave) CTicker;
<a name="l01055"></a>01055 }
<a name="l01056"></a>01056 <span class="comment">/*</span>
<a name="l01057"></a>01057 <span class="comment"> We're left owning the final ticker instance, all prior</span>
<a name="l01058"></a>01058 <span class="comment"> instances having been automatically deleted.</span>
<a name="l01059"></a>01059 <span class="comment"> */</span>
<a name="l01060"></a>01060 }
<a name="l01061"></a>01061
<a name="l01062"></a>01062 {
<a name="l01063"></a>01063 <span class="comment">// If you have stateful code where a pointer can sometimes be NULL.</span>
<a name="l01064"></a>01064 LCleanedupPtr<CTicker> t(<span class="keyword">new</span>(ELeave) CTicker);
<a name="l01065"></a>01065
<a name="l01066"></a>01066 <span class="comment">// Does t refer to NULL?</span>
<a name="l01067"></a>01067 <span class="keywordflow">if</span> (!t)
<a name="l01068"></a>01068 {
<a name="l01069"></a>01069 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtNull,<span class="stringliteral">"LCleanedupPtr object refers to Null\n"</span> );
<a name="l01070"></a>01070 gConsole->Printf(KTxtNull);
<a name="l01071"></a>01071 }
<a name="l01072"></a>01072
<a name="l01073"></a>01073 t = NULL; <span class="comment">// Also releases the currently managed CTicker </span>
<a name="l01074"></a>01074
<a name="l01075"></a>01075 <span class="comment">// Does t refer to a non-NULL pointer?</span>
<a name="l01076"></a>01076 <span class="keywordflow">if</span> (t)
<a name="l01077"></a>01077 {
<a name="l01078"></a>01078 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtNonNull,<span class="stringliteral">"LCleanedupPtr object refers to Non Null pointer\n"</span> );
<a name="l01079"></a>01079 gConsole->Printf(KTxtNonNull);
<a name="l01080"></a>01080 }
<a name="l01081"></a>01081 }
<a name="l01082"></a>01082
<a name="l01083"></a>01083 {
<a name="l01084"></a>01084 <span class="comment">// LCleanedupPtr uses delete to cleanup by default, but alternative cleanups can be specified</span>
<a name="l01085"></a>01085
<a name="l01086"></a>01086 <span class="comment">// We just want to free this one and not invoke the destructor</span>
<a name="l01087"></a>01087 LCleanedupPtr<CTicker, TPointerFree> t(static_cast<CTicker*>(User::AllocL(<span class="keyword">sizeof</span>(CTicker))));
<a name="l01088"></a>01088
<a name="l01089"></a>01089 <span class="comment">// Now User::Free() is called when t goes out of scope</span>
<a name="l01090"></a>01090 }
<a name="l01091"></a>01091
<a name="l01092"></a>01092 {
<a name="l01093"></a>01093 <span class="comment">/*</span>
<a name="l01094"></a>01094 <span class="comment"> As well as the stock options, custom cleanup policies can</span>
<a name="l01095"></a>01095 <span class="comment"> also be defined. See above for the definition of</span>
<a name="l01096"></a>01096 <span class="comment"> TTickerZap.</span>
<a name="l01097"></a>01097 <span class="comment"> */</span>
<a name="l01098"></a>01098 LCleanedupPtr<CTicker, TTickerZapStrategy> t(<span class="keyword">new</span>(ELeave) CTicker);
<a name="l01099"></a>01099
<a name="l01100"></a>01100 <span class="comment">// Now Zap() is called on the CTicker instance when t goes out of scope</span>
<a name="l01101"></a>01101 }
<a name="l01102"></a>01102
<a name="l01103"></a>01103 {
<a name="l01104"></a>01104 <span class="comment">/*</span>
<a name="l01105"></a>01105 <span class="comment"> LCleanedupHandle is very similar in behaviour to</span>
<a name="l01106"></a>01106 <span class="comment"> LCleanedupPtr, the main difference being that it can define</span>
<a name="l01107"></a>01107 <span class="comment"> and contain its own instance of a handle rather than</span>
<a name="l01108"></a>01108 <span class="comment"> being supplied one.</span>
<a name="l01109"></a>01109 <span class="comment"> */</span>
<a name="l01110"></a>01110 LCleanedupHandle<RTimer> t;
<a name="l01111"></a>01111
<a name="l01112"></a>01112 <span class="comment">// Again, access to managed handle members is via -></span>
<a name="l01113"></a>01113 t->CreateLocal() OR_LEAVE;
<a name="l01114"></a>01114 t->Cancel();
<a name="l01115"></a>01115
<a name="l01116"></a>01116 <span class="comment">//We can get a reference to the handle for passing to functions using *</span>
<a name="l01117"></a>01117 RegisterTimer(*t);
<a name="l01118"></a>01118
<a name="l01119"></a>01119 <span class="comment">/*</span>
<a name="l01120"></a>01120 <span class="comment"> When the management object goes out of scope, either</span>
<a name="l01121"></a>01121 <span class="comment"> normally or as the result of a leave, the managed object is</span>
<a name="l01122"></a>01122 <span class="comment"> automatically cleanup by calling Close() on it.</span>
<a name="l01123"></a>01123 <span class="comment"> */</span>
<a name="l01124"></a>01124 }
<a name="l01125"></a>01125
<a name="l01126"></a>01126 {
<a name="l01127"></a>01127 <span class="comment">/*</span>
<a name="l01128"></a>01128 <span class="comment"> LCleanedupHandle calls Close() by default, but alternative</span>
<a name="l01129"></a>01129 <span class="comment"> cleanups can be specified.</span>
<a name="l01130"></a>01130 <span class="comment"> </span>
<a name="l01131"></a>01131 <span class="comment"> We want this RPointerArray cleanup with with</span>
<a name="l01132"></a>01132 <span class="comment"> ResetAndDestroy instead of Close().</span>
<a name="l01133"></a>01133 <span class="comment"> */</span>
<a name="l01134"></a>01134 LCleanedupHandle<RPointerArray<HBufC>, TResetAndDestroy> array;
<a name="l01135"></a>01135 <span class="keywordflow">for</span> (TInt i = 0; i < 10; ++i)
<a name="l01136"></a>01136 {
<a name="l01137"></a>01137 array->AppendL(HBufC::NewL(5));
<a name="l01138"></a>01138 }
<a name="l01139"></a>01139
<a name="l01140"></a>01140 <span class="comment">//Now when array goes out of scope, ResetAndDestroy is called to clean it up.</span>
<a name="l01141"></a>01141 }
<a name="l01142"></a>01142
<a name="l01143"></a>01143 {
<a name="l01144"></a>01144 <span class="comment">/*</span>
<a name="l01145"></a>01145 <span class="comment"> As well as the stock options, custom cleanup policies can</span>
<a name="l01146"></a>01146 <span class="comment"> also be defined. See above for the definition of TCancelClose.</span>
<a name="l01147"></a>01147 <span class="comment"> */</span>
<a name="l01148"></a>01148 LCleanedupHandle<RTimer, TCancelClose> t;
<a name="l01149"></a>01149 t->CreateLocal();
<a name="l01150"></a>01150
<a name="l01151"></a>01151 <span class="comment">// Now Cancel() followed by Close() are called when t goes out of scope</span>
<a name="l01152"></a>01152 }
<a name="l01153"></a>01153
<a name="l01154"></a>01154
<a name="l01155"></a>01155 {
<a name="l01156"></a>01156 <span class="comment">/*</span>
<a name="l01157"></a>01157 <span class="comment"> LCleanedupHandleRef calls Close() by default, but alternative</span>
<a name="l01158"></a>01158 <span class="comment"> cleanups can be specified.</span>
<a name="l01159"></a>01159 <span class="comment"> </span>
<a name="l01160"></a>01160 <span class="comment"> We want this RPointerArray cleanup with</span>
<a name="l01161"></a>01161 <span class="comment"> ResetAndDestroy instead of Close().</span>
<a name="l01162"></a>01162 <span class="comment"> */</span>
<a name="l01163"></a>01163 RPointerArray<HBufC> rar;
<a name="l01164"></a>01164 <span class="comment">// calls to functions that cannot leave here</span>
<a name="l01165"></a>01165 rar.Append(HBufC::NewL(5));
<a name="l01166"></a>01166 rar.Append(HBufC::NewL(5));
<a name="l01167"></a>01167
<a name="l01168"></a>01168
<a name="l01169"></a>01169 LCleanedupRef<RPointerArray<HBufC>, TResetAndDestroy> array(rar);
<a name="l01170"></a>01170 <span class="comment">// calls to functions that could leave here</span>
<a name="l01171"></a>01171 <span class="keywordflow">for</span> (TInt i = 0; i < 10; ++i)
<a name="l01172"></a>01172 {
<a name="l01173"></a>01173 array->AppendL(HBufC::NewL(5));
<a name="l01174"></a>01174 }
<a name="l01175"></a>01175
<a name="l01176"></a>01176 <span class="comment">// Now when array goes out of scope, ResetAndDestroy is called to clean it up</span>
<a name="l01177"></a>01177 }
<a name="l01178"></a>01178
<a name="l01179"></a>01179 {
<a name="l01180"></a>01180 <span class="comment">/*</span>
<a name="l01181"></a>01181 <span class="comment"> Never mix direct cleanup stack API calls with management</span>
<a name="l01182"></a>01182 <span class="comment"> class use within the same function, because their</span>
<a name="l01183"></a>01183 <span class="comment"> interaction can be confusing and counter-intuitive. Avoid</span>
<a name="l01184"></a>01184 <span class="comment"> the use of LC methods that leave objects on the cleanup</span>
<a name="l01185"></a>01185 <span class="comment"> stack, and use L methods instead.</span>
<a name="l01186"></a>01186 <span class="comment"></span>
<a name="l01187"></a>01187 <span class="comment"> If a badly-behaved API were to offer only an LC variant,</span>
<a name="l01188"></a>01188 <span class="comment"> you would have to use it as follows</span>
<a name="l01189"></a>01189 <span class="comment"> */</span>
<a name="l01190"></a>01190 HBufC* raw = HBufC::NewLC(5);
<a name="l01191"></a>01191 <span class="comment">// Must pop immediately to balance the cleanup stack, before instantiating the manager</span>
<a name="l01192"></a>01192 CleanupStack::Pop();
<a name="l01193"></a>01193 LCleanedupPtr<HBufC> wrapped(raw);
<a name="l01194"></a>01194
<a name="l01195"></a>01195 <span class="comment">/*</span>
<a name="l01196"></a>01196 <span class="comment"> Never do this:</span>
<a name="l01197"></a>01197 <span class="comment"> LCleanedupPtr<HBufC> buf(HBufC::NewLC(5));</span>
<a name="l01198"></a>01198 <span class="comment"> CleanupStack::Pop();</span>
<a name="l01199"></a>01199 <span class="comment"> because the manager will be popped (having been pushed</span>
<a name="l01200"></a>01200 <span class="comment"> last), not the raw buf pointer as you might have hoped</span>
<a name="l01201"></a>01201 <span class="comment"></span>
<a name="l01202"></a>01202 <span class="comment"> A cleaner alternative may be to write your own L function</span>
<a name="l01203"></a>01203 <span class="comment"> wrapper around the LC function supplied.</span>
<a name="l01204"></a>01204 <span class="comment"></span>
<a name="l01205"></a>01205 <span class="comment"> Luckily this situation (an LC method without a</span>
<a name="l01206"></a>01206 <span class="comment"> corresponding L method) is rare in practice.</span>
<a name="l01207"></a>01207 <span class="comment"> */</span>
<a name="l01208"></a>01208 }
<a name="l01209"></a>01209
<a name="l01210"></a>01210 {
<a name="l01211"></a>01211 <span class="comment">// Although rarely used on the Symbian platform, C++ arrays are supported with a custom management class</span>
<a name="l01212"></a>01212 LCleanedupArray<CTicker> array(<span class="keyword">new</span> CTicker[5]);
<a name="l01213"></a>01213
<a name="l01214"></a>01214 <span class="comment">// The array is cleaned up with delete[] on scope exit</span>
<a name="l01215"></a>01215 }
<a name="l01216"></a>01216
<a name="l01217"></a>01217 {
<a name="l01218"></a>01218 <span class="comment">/*</span>
<a name="l01219"></a>01219 <span class="comment"> Although most cases are best covered by applying custom</span>
<a name="l01220"></a>01220 <span class="comment"> cleanup policies to the management classes already</span>
<a name="l01221"></a>01221 <span class="comment"> described, there is also a general TCleanupItem style</span>
<a name="l01222"></a>01222 <span class="comment"> cleanup option.</span>
<a name="l01223"></a>01223 <span class="comment"> */</span>
<a name="l01224"></a>01224 TAny* data = NULL; <span class="comment">// But could be anything</span>
<a name="l01225"></a>01225 LCleanedupGuard guard1(BespokeCleanupFunction, data);
<a name="l01226"></a>01226 <span class="comment">// On scope exit BespokeCleanupFunction() is called on data.</span>
<a name="l01227"></a>01227
<a name="l01228"></a>01228 LCleanedupGuard guard2(BespokeCleanupFunction, data);
<a name="l01229"></a>01229 <span class="comment">// But cleanup can also be disabled in this case, as follows:</span>
<a name="l01230"></a>01230 guard2.Dismiss();
<a name="l01231"></a>01231 }
<a name="l01232"></a>01232
<a name="l01233"></a>01233 {
<a name="l01234"></a>01234 LCleanedupHandle<RFs> managedFs;
<a name="l01235"></a>01235 managedFs->Connect();
<a name="l01236"></a>01236 <span class="comment">//default cleanup strategy is to call RFs::Close() on scope exit;</span>
<a name="l01237"></a>01237 }
<a name="l01238"></a>01238
<a name="l01239"></a>01239 {
<a name="l01240"></a>01240 LCleanedupHandle<RSimple, TFree> simple;
<a name="l01241"></a>01241 simple->OpenL(23);
<a name="l01242"></a>01242 <span class="comment">//Specified cleanup strategy is to call RSimple::Free() on scope exit;</span>
<a name="l01243"></a>01243 }
<a name="l01244"></a>01244
<a name="l01245"></a>01245 <span class="comment">/*</span>
<a name="l01246"></a>01246 <span class="comment"> Because the DEFINE_CLEANUP_FUNCTION is defined above, the default</span>
<a name="l01247"></a>01247 <span class="comment"> cleanup function for RSimple is RSimple::ReleaseData() rather than</span>
<a name="l01248"></a>01248 <span class="comment"> RSimple::Close()</span>
<a name="l01249"></a>01249 <span class="comment"> */</span>
<a name="l01250"></a>01250 {
<a name="l01251"></a>01251 LCleanedupHandle<RSimple> simple;
<a name="l01252"></a>01252 simple->OpenL(23);
<a name="l01253"></a>01253 <span class="comment">//Custom cleanup strategy is to call RSimple::ReleaseData() on scope exit</span>
<a name="l01254"></a>01254 }
<a name="l01255"></a>01255
<a name="l01256"></a>01256 {
<a name="l01257"></a>01257 RSimple simple;
<a name="l01258"></a>01258
<a name="l01259"></a>01259 <span class="comment">//The RSimple class above defines a static cleanup function</span>
<a name="l01260"></a>01260 <span class="comment">//RSimple::Cleanup().</span>
<a name="l01261"></a>01261 LCleanedupGuard guard(RSimple::Cleanup, &simple);
<a name="l01262"></a>01262
<a name="l01263"></a>01263 simple.OpenL(10);
<a name="l01264"></a>01264
<a name="l01265"></a>01265 <span class="comment">//On scope exit RSimple::Cleanup() is called passing &simple.</span>
<a name="l01266"></a>01266 }
<a name="l01267"></a>01267 }
<a name="l01268"></a>01268
<a name="l01269"></a>01269 <span class="keywordtype">void</span> WalkthroughUsageL()
<a name="l01270"></a>01270 {
<a name="l01271"></a>01271 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtOption3,<span class="stringliteral">"Option3: Memory used by EUser high level classes\n"</span>);
<a name="l01272"></a>01272 gConsole->Printf(KTxtOption3);
<a name="l01273"></a>01273 RFile file;
<a name="l01274"></a>01274
<a name="l01275"></a>01275 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtSizeofRFile,<span class="stringliteral">"Size of RFile = %d\n"</span>);
<a name="l01276"></a>01276 gConsole->Printf(KTxtSizeofRFile, <span class="keyword">sizeof</span>(file));
<a name="l01277"></a>01277
<a name="l01278"></a>01278 LCleanedupHandle<RFile> cFile;
<a name="l01279"></a>01279
<a name="l01280"></a>01280 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtSizeofLCleanedupHandleRFile,<span class="stringliteral">"Size of LCleanedupHandle<RFile> = %d\n"</span>);
<a name="l01281"></a>01281 gConsole->Printf(KTxtSizeofLCleanedupHandleRFile, <span class="keyword">sizeof</span>(cFile));
<a name="l01282"></a>01282 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l01283"></a>01283 gConsole->Getch();
<a name="l01284"></a>01284
<a name="l01285"></a>01285 LCleanedupRef<RFile> crFile(file);
<a name="l01286"></a>01286 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtSizeofLCleanedupRefRFile,<span class="stringliteral">"Size of LCleanedupRef<RFile> = %d\n"</span>);
<a name="l01287"></a>01287 gConsole->Printf(KTxtSizeofLCleanedupRefRFile, <span class="keyword">sizeof</span>(crFile));
<a name="l01288"></a>01288 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l01289"></a>01289 gConsole->Getch();
<a name="l01290"></a>01290
<a name="l01291"></a>01291 CTicker* tracker = <span class="keyword">new</span>(ELeave) CTicker;
<a name="l01292"></a>01292 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtSizeofCTracker,<span class="stringliteral">"Size of CTracker* = %d\n"</span>);
<a name="l01293"></a>01293 gConsole->Printf(KTxtSizeofCTracker, <span class="keyword">sizeof</span>(tracker));
<a name="l01294"></a>01294 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l01295"></a>01295 gConsole->Getch();
<a name="l01296"></a>01296
<a name="l01297"></a>01297 LCleanedupPtr<CTicker> cTracker(tracker);
<a name="l01298"></a>01298 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtSizeofLCleanedupHandleCTicker,<span class="stringliteral">"Size of LCleanedupPtr<CTicker> = %d\n"</span>);
<a name="l01299"></a>01299 gConsole->Printf(KTxtSizeofLCleanedupHandleCTicker, <span class="keyword">sizeof</span>(LCleanedupPtr<CTicker>));
<a name="l01300"></a>01300 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l01301"></a>01301 gConsole->Getch();
<a name="l01302"></a>01302 }
<a name="l01303"></a>01303
<a name="l01304"></a>01304 TInt TestL()
<a name="l01305"></a>01305 {
<a name="l01306"></a>01306 gConsole=Console::NewL(KTxtExample,TSize(KConsFullScreen,KConsFullScreen));
<a name="l01307"></a>01307 CleanupStack::PushL(gConsole);
<a name="l01308"></a>01308 gConsole->Printf(KTxtExample);
<a name="l01309"></a>01309 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l01310"></a>01310 gConsole->Getch();
<a name="l01311"></a>01311 WalkthroughStringsL();
<a name="l01312"></a>01312 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l01313"></a>01313 gConsole->Getch();
<a name="l01314"></a>01314 WalkthroughManagedL();
<a name="l01315"></a>01315 gConsole->Printf(KTxtPressAnyKeyToContinue);
<a name="l01316"></a>01316 gConsole->Getch();
<a name="l01317"></a>01317 WalkthroughUsageL();
<a name="l01318"></a>01318 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPressAnyKeyToExit,<span class="stringliteral">"\nPress any key to exit"</span>);
<a name="l01319"></a>01319 gConsole->Printf(KTxtPressAnyKeyToExit);
<a name="l01320"></a>01320 gConsole->Getch();
<a name="l01321"></a>01321 CleanupStack::PopAndDestroy(gConsole); <span class="comment">// delete the gConsole</span>
<a name="l01322"></a>01322 <span class="keywordflow">return</span> KErrNone;
<a name="l01323"></a>01323 }
<a name="l01324"></a>01324
<a name="l01325"></a>01325 TInt E32Main()
<a name="l01326"></a>01326 {
<a name="l01327"></a>01327 __UHEAP_MARK;
<a name="l01328"></a>01328 CTrapCleanup* cleanup=CTrapCleanup::New(); <span class="comment">// Create clean-up stack.</span>
<a name="l01329"></a>01329 TInt status;
<a name="l01330"></a>01330 <span class="keywordflow">if</span>(cleanup!=NULL)
<a name="l01331"></a>01331 {
<a name="l01332"></a>01332 TRAP(status, TestL());
<a name="l01333"></a>01333 __ASSERT_ALWAYS(!status,User::Panic(KTxtExample,status));
<a name="l01334"></a>01334 }
<a name="l01335"></a>01335 <span class="keyword">delete</span> cleanup; <span class="comment">// Delete clean-up stack. </span>
<a name="l01336"></a>01336 __UHEAP_MARKEND;
<a name="l01337"></a>01337
<a name="l01338"></a>01338 <span class="keywordflow">return</span> status;
<a name="l01339"></a>01339 }
<a name="l01340"></a>01340
<a name="l01341"></a>01341
<a name="l01342"></a>01342 <span class="comment">// eof</span>
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