Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_fibonacci1_8cpp_source.html
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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<h1>examples/Base/IPC/Async/Fibonacci1/Fibonacci1.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 wraps a console in an active object.</span>
<a name="l00015"></a>00015 <span class="comment">// Calculates Fibonacci number as chosen by the user. Note that, in this</span>
<a name="l00016"></a>00016 <span class="comment">// example, the calculation is done as part of the console active object's </span>
<a name="l00017"></a>00017 <span class="comment">// RunL() and can take a long time to complete. It also means that nothing</span>
<a name="l00018"></a>00018 <span class="comment">// else can happen (including responding to keyboard events) until the </span>
<a name="l00019"></a>00019 <span class="comment">// calculation is complete. </span>
<a name="l00020"></a>00020 <span class="comment">//</span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="preprocessor">#include <e32base.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <e32cons.h></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <e32std.h></span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028
<a name="l00029"></a>00029 LOCAL_D CConsoleBase* console;
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtMainInstructions,<span class="stringliteral">"\n\nPress 'F' to start\n 'ESC' to exit.\n"</span>);
<a name="l00032"></a>00032
<a name="l00034"></a>00034 <span class="comment">//</span>
<a name="l00035"></a>00035 <span class="comment">// -----> CActiveConsole (definition)</span>
<a name="l00036"></a>00036 <span class="comment">//</span>
<a name="l00037"></a>00037 <span class="comment">// An abstract class which provides the facility to issue key requests. </span>
<a name="l00038"></a>00038 <span class="comment">//</span>
<a name="l00040"></a>00040 <span class="comment"></span>
<a name="l00041"></a>00041 <span class="keyword">class </span>CActiveConsole : <span class="keyword">public</span> CActive
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043 <span class="keyword">public</span>:
<a name="l00044"></a>00044 <span class="comment">// Construction</span>
<a name="l00045"></a>00045 CActiveConsole(CConsoleBase* aConsole);
<a name="l00046"></a>00046 <span class="keywordtype">void</span> ConstructL();
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="comment">// Destruction</span>
<a name="l00049"></a>00049 ~CActiveConsole();
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="comment">// Issue request</span>
<a name="l00052"></a>00052 <span class="keywordtype">void</span> RequestCharacter();
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="comment">// Cancel request.</span>
<a name="l00055"></a>00055 <span class="comment">// Defined as pure virtual by CActive;</span>
<a name="l00056"></a>00056 <span class="comment">// implementation provided by this class.</span>
<a name="l00057"></a>00057 <span class="keywordtype">void</span> DoCancel();
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="comment">// Service completed request.</span>
<a name="l00060"></a>00060 <span class="comment">// Defined as pure virtual by CActive;</span>
<a name="l00061"></a>00061 <span class="comment">// implementation provided by this class,</span>
<a name="l00062"></a>00062 <span class="keywordtype">void</span> RunL();
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="comment">// Called from RunL() - an implementation must be provided</span>
<a name="l00065"></a>00065 <span class="comment">// by derived classes to handle the completed request</span>
<a name="l00066"></a>00066 <span class="keyword">virtual</span> <span class="keywordtype">void</span> ProcessKeyPress(TChar aChar) = 0;
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="keyword">protected</span>:
<a name="l00069"></a>00069 <span class="comment">// Data members defined by this class</span>
<a name="l00070"></a>00070 CConsoleBase* iConsole; <span class="comment">// A console for reading from</span>
<a name="l00071"></a>00071 };
<a name="l00072"></a>00072
<a name="l00073"></a>00073
<a name="l00075"></a>00075 <span class="comment">//</span>
<a name="l00076"></a>00076 <span class="comment">// -----> CExampleScheduler (definition)</span>
<a name="l00077"></a>00077 <span class="comment">//</span>
<a name="l00079"></a>00079 <span class="comment"></span>
<a name="l00080"></a>00080 <span class="keyword">class </span>CExampleScheduler : <span class="keyword">public</span> CActiveScheduler
<a name="l00081"></a>00081 {
<a name="l00082"></a>00082 <span class="keyword">public</span>:
<a name="l00083"></a>00083 <span class="keywordtype">void</span> Error (TInt aError) <span class="keyword">const</span>;
<a name="l00084"></a>00084 <span class="keywordtype">void</span> WaitForAnyRequest();
<a name="l00085"></a>00085 <span class="keywordtype">void</span> SetActiveObject(CActiveConsole* aActiveConsole);
<a name="l00086"></a>00086 <span class="keyword">private</span>:
<a name="l00087"></a>00087 <span class="comment">// data members defined for this class</span>
<a name="l00088"></a>00088 CActiveConsole* iActiveConsole;
<a name="l00089"></a>00089 };
<a name="l00090"></a>00090
<a name="l00091"></a>00091
<a name="l00093"></a>00093 <span class="comment">//</span>
<a name="l00094"></a>00094 <span class="comment">// -----> TFibonacciEngine (definition)</span>
<a name="l00095"></a>00095 <span class="comment">//</span>
<a name="l00096"></a>00096 <span class="comment">// This class provides the fibonacci calculation engine</span>
<a name="l00097"></a>00097 <span class="comment">//</span>
<a name="l00099"></a>00099 <span class="comment"></span>
<a name="l00100"></a>00100 <span class="keyword">class </span>TFibonacciEngine
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102 <span class="keyword">public</span>:
<a name="l00103"></a>00103 <span class="keywordtype">void</span> Calculate (TInt aTerms) ;
<a name="l00104"></a>00104
<a name="l00105"></a>00105 TInt iResult ;
<a name="l00106"></a>00106 } ;
<a name="l00107"></a>00107
<a name="l00108"></a>00108
<a name="l00110"></a>00110 <span class="comment">//</span>
<a name="l00111"></a>00111 <span class="comment">// -----> CFibonacciApplication (definition)</span>
<a name="l00112"></a>00112 <span class="comment">//</span>
<a name="l00113"></a>00113 <span class="comment">// This class encapsulates the fibonacci calculation engine</span>
<a name="l00114"></a>00114 <span class="comment">//</span>
<a name="l00116"></a>00116 <span class="comment"></span>
<a name="l00117"></a>00117 <span class="keyword">class </span>CFibonacciApplication : <span class="keyword">public</span> CActiveConsole
<a name="l00118"></a>00118 {
<a name="l00119"></a>00119 <span class="keyword">public</span>:
<a name="l00120"></a>00120 CFibonacciApplication(CConsoleBase* aConsole) ;
<a name="l00121"></a>00121 <span class="keywordtype">void</span> ConstructL();
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="comment">// Static construction</span>
<a name="l00124"></a>00124 <span class="keyword">static</span> CFibonacciApplication* NewLC(CConsoleBase* aConsole) ;
<a name="l00125"></a>00125
<a name="l00126"></a>00126 <span class="comment">// service request</span>
<a name="l00127"></a>00127 <span class="keywordtype">void</span> ProcessKeyPress(TChar aChar) ;
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="keyword">private</span>:
<a name="l00130"></a>00130 CConsoleBase* iConsole ;
<a name="l00131"></a>00131 TFibonacciEngine iFibonacciEngine ;
<a name="l00132"></a>00132 };
<a name="l00133"></a>00133
<a name="l00134"></a>00134
<a name="l00136"></a>00136 <span class="comment">//</span>
<a name="l00137"></a>00137 <span class="comment">// -----> CActiveConsole (implementation)</span>
<a name="l00138"></a>00138 <span class="comment">//</span>
<a name="l00140"></a>00140 <span class="comment"></span>
<a name="l00141"></a>00141 CActiveConsole::CActiveConsole( CConsoleBase* aConsole)
<a name="l00142"></a>00142 : CActive(CActive::EPriorityUserInput)
<a name="l00143"></a>00143 <span class="comment">// Construct high-priority active object</span>
<a name="l00144"></a>00144 {
<a name="l00145"></a>00145 iConsole = aConsole;
<a name="l00146"></a>00146 __DECLARE_NAME(_S(<span class="stringliteral">"CActiveConsole"</span>));
<a name="l00147"></a>00147
<a name="l00148"></a>00148 }
<a name="l00149"></a>00149
<a name="l00150"></a>00150 <span class="keywordtype">void</span> CActiveConsole::ConstructL()
<a name="l00151"></a>00151 {
<a name="l00152"></a>00152 <span class="comment">// Add to active scheduler</span>
<a name="l00153"></a>00153 CActiveScheduler::Add(<span class="keyword">this</span>);
<a name="l00154"></a>00154 }
<a name="l00155"></a>00155
<a name="l00156"></a>00156 CActiveConsole::~CActiveConsole()
<a name="l00157"></a>00157 {
<a name="l00158"></a>00158 <span class="comment">// Make sure we're cancelled</span>
<a name="l00159"></a>00159 Cancel();
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="keywordtype">void</span> CActiveConsole::DoCancel()
<a name="l00163"></a>00163 {
<a name="l00164"></a>00164 iConsole->ReadCancel();
<a name="l00165"></a>00165 }
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="keywordtype">void</span> CActiveConsole::RunL()
<a name="l00168"></a>00168 {
<a name="l00169"></a>00169 <span class="comment">// Handle completed request</span>
<a name="l00170"></a>00170 ProcessKeyPress(TChar(iConsole->KeyCode()));
<a name="l00171"></a>00171 }
<a name="l00172"></a>00172
<a name="l00173"></a>00173 <span class="keywordtype">void</span> CActiveConsole::RequestCharacter()
<a name="l00174"></a>00174 {
<a name="l00175"></a>00175 <span class="comment">// A request is issued to the CConsoleBase to accept a</span>
<a name="l00176"></a>00176 <span class="comment">// character from the keyboard.</span>
<a name="l00177"></a>00177 iConsole->Read(iStatus);
<a name="l00178"></a>00178 SetActive();
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180
<a name="l00181"></a>00181
<a name="l00183"></a>00183 <span class="comment">//</span>
<a name="l00184"></a>00184 <span class="comment">// -----> CExampleScheduler (implementation)</span>
<a name="l00185"></a>00185 <span class="comment">//</span>
<a name="l00187"></a>00187 <span class="comment"></span>
<a name="l00188"></a>00188 <span class="keywordtype">void</span> CExampleScheduler::Error(TInt aError)<span class="keyword"> const</span>
<a name="l00189"></a>00189 <span class="keyword"> </span>{
<a name="l00190"></a>00190 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtSchedulerError,<span class="stringliteral">"CExampleScheduler - error"</span>);
<a name="l00191"></a>00191 User::Panic(KTxtSchedulerError,aError);
<a name="l00192"></a>00192 }
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <span class="keywordtype">void</span> CExampleScheduler::WaitForAnyRequest()
<a name="l00195"></a>00195 {
<a name="l00196"></a>00196 <span class="keywordflow">if</span> (!(iActiveConsole->IsActive()))
<a name="l00197"></a>00197 iActiveConsole->RequestCharacter();
<a name="l00198"></a>00198 CActiveScheduler::WaitForAnyRequest();
<a name="l00199"></a>00199 }
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="keywordtype">void</span> CExampleScheduler::SetActiveObject(CActiveConsole* aActiveConsole)
<a name="l00202"></a>00202 {
<a name="l00203"></a>00203 iActiveConsole = aActiveConsole;
<a name="l00204"></a>00204 }
<a name="l00205"></a>00205
<a name="l00206"></a>00206
<a name="l00208"></a>00208 <span class="comment">// CFibonacciApplication support routine</span>
<a name="l00209"></a>00209 <span class="comment">// uses up arrow & down arrow to change number, Enter to select</span>
<a name="l00211"></a>00211 <span class="comment"></span>
<a name="l00212"></a>00212 TInt GetValueFromKeyboard (TInt aInitial, TInt aStep, TInt lowerLimit, TInt upperLimit, <span class="keyword">const</span> TDesC& aPrompt, CConsoleBase* aConsole)
<a name="l00213"></a>00213 {
<a name="l00214"></a>00214 TChar input ;
<a name="l00215"></a>00215 TInt value = aInitial ;
<a name="l00216"></a>00216
<a name="l00217"></a>00217 aConsole->Printf(aPrompt) ;
<a name="l00218"></a>00218 <span class="keywordflow">do</span>
<a name="l00219"></a>00219 {
<a name="l00220"></a>00220 aConsole->SetPos(0);
<a name="l00221"></a>00221 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat1,<span class="stringliteral">"%d "</span>);
<a name="l00222"></a>00222 aConsole->Printf(KFormat1, value);
<a name="l00223"></a>00223 input = aConsole->Getch() ;
<a name="l00224"></a>00224 <span class="keywordflow">if</span> (input == EKeyUpArrow && value < upperLimit) value = value + aStep ;
<a name="l00225"></a>00225 <span class="keywordflow">if</span> (input == EKeyDownArrow && value > lowerLimit) value = value - aStep ;
<a name="l00226"></a>00226 <span class="keywordflow">if</span> (input == <span class="charliteral">'c'</span>) value = -1;
<a name="l00227"></a>00227 }
<a name="l00228"></a>00228 <span class="keywordflow">while</span> (input != EKeyEnter && input != <span class="charliteral">'c'</span>) ;
<a name="l00229"></a>00229
<a name="l00230"></a>00230 <span class="keywordflow">return</span> value ;
<a name="l00231"></a>00231 }
<a name="l00232"></a>00232
<a name="l00233"></a>00233
<a name="l00235"></a>00235 <span class="comment">//</span>
<a name="l00236"></a>00236 <span class="comment">// -----> CFibonacciApplication (implementation)</span>
<a name="l00237"></a>00237 <span class="comment">//</span>
<a name="l00239"></a>00239 <span class="comment"></span>
<a name="l00240"></a>00240 CFibonacciApplication::CFibonacciApplication(CConsoleBase* aConsole )
<a name="l00241"></a>00241 : CActiveConsole(aConsole)
<a name="l00242"></a>00242 <span class="comment">// construct zero-priority active object</span>
<a name="l00243"></a>00243 {
<a name="l00244"></a>00244 iConsole = aConsole ;
<a name="l00245"></a>00245 __DECLARE_NAME(_S(<span class="stringliteral">"CFibonacciApplication"</span>));
<a name="l00246"></a>00246 }
<a name="l00247"></a>00247
<a name="l00248"></a>00248
<a name="l00249"></a>00249 CFibonacciApplication* CFibonacciApplication::NewLC(CConsoleBase* aConsole )
<a name="l00250"></a>00250 {
<a name="l00251"></a>00251 CFibonacciApplication* <span class="keyword">self</span>=<span class="keyword">new</span> (ELeave) CFibonacciApplication(aConsole);
<a name="l00252"></a>00252 CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00253"></a>00253 <span class="keyword">self</span>->ConstructL();
<a name="l00254"></a>00254 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00255"></a>00255 }
<a name="l00256"></a>00256
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <span class="keywordtype">void</span> CFibonacciApplication::ConstructL()
<a name="l00259"></a>00259 {
<a name="l00260"></a>00260 <span class="comment">// Add to active scheduler</span>
<a name="l00261"></a>00261 CActiveScheduler::Add(<span class="keyword">this</span>);
<a name="l00262"></a>00262 <span class="comment">// Make this the active object</span>
<a name="l00263"></a>00263 ((CExampleScheduler*)(CActiveScheduler::Current()))->SetActiveObject(<span class="keyword">this</span>);
<a name="l00264"></a>00264 }
<a name="l00265"></a>00265
<a name="l00266"></a>00266
<a name="l00267"></a>00267 <span class="keywordtype">void</span> CFibonacciApplication::ProcessKeyPress(TChar aChar)
<a name="l00268"></a>00268 {
<a name="l00269"></a>00269 <span class="comment">// if key is ESC </span>
<a name="l00270"></a>00270 <span class="comment">// cancel any outstanding request</span>
<a name="l00271"></a>00271 <span class="comment">// stop the scheduler</span>
<a name="l00272"></a>00272 <span class="keywordflow">if</span> (aChar == EKeyEscape)
<a name="l00273"></a>00273 {
<a name="l00274"></a>00274 CActiveScheduler::Stop();
<a name="l00275"></a>00275 <span class="keywordflow">return</span>;
<a name="l00276"></a>00276 }
<a name="l00277"></a>00277
<a name="l00278"></a>00278 <span class="comment">// If key is "f" or "F"</span>
<a name="l00279"></a>00279 <span class="comment">// cancel any outstanding request</span>
<a name="l00280"></a>00280 <span class="comment">// issue a fibonacci request.</span>
<a name="l00281"></a>00281 <span class="keywordflow">if</span> (aChar == <span class="charliteral">'f'</span> || aChar == <span class="charliteral">'F'</span>)
<a name="l00282"></a>00282 {
<a name="l00283"></a>00283 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtStartingFibonacci,<span class="stringliteral">"\nStarting Fibonacci.... \n"</span>);
<a name="l00284"></a>00284 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtReturnTermNumber,<span class="stringliteral">"\nENTER selects number, and starts calculation\nUP arrow increases num\nDOWN arrow decreases num\nC cancels\n\n"</span>);
<a name="l00285"></a>00285 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtCalculating,<span class="stringliteral">"\nCalculating...\n"</span>);
<a name="l00286"></a>00286 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat2,<span class="stringliteral">"\nResult : %u \n"</span>);
<a name="l00287"></a>00287 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtCancelled,<span class="stringliteral">"Cancelled"</span>);
<a name="l00288"></a>00288
<a name="l00289"></a>00289 iConsole->Printf(KTxtStartingFibonacci);
<a name="l00290"></a>00290
<a name="l00291"></a>00291 TInt iterations = GetValueFromKeyboard(5,1,2,46, KTxtReturnTermNumber, iConsole) ;
<a name="l00292"></a>00292 <span class="keywordflow">if</span> (iterations == -1) <span class="comment">// convenient if awkward but allows us to indicate a request to cancel.</span>
<a name="l00293"></a>00293 {
<a name="l00294"></a>00294 iConsole->Printf(KTxtCancelled);
<a name="l00295"></a>00295 iConsole->Printf(KTxtMainInstructions);
<a name="l00296"></a>00296 <span class="keywordflow">return</span>;
<a name="l00297"></a>00297 }
<a name="l00298"></a>00298
<a name="l00299"></a>00299 iConsole->Printf(KTxtCalculating);
<a name="l00300"></a>00300 iFibonacciEngine.Calculate(iterations);
<a name="l00301"></a>00301
<a name="l00302"></a>00302 iConsole->Printf(KFormat2, iFibonacciEngine.iResult) ;
<a name="l00303"></a>00303 iConsole->Printf(KTxtMainInstructions);
<a name="l00304"></a>00304 <span class="keywordflow">return</span>;
<a name="l00305"></a>00305 }
<a name="l00306"></a>00306
<a name="l00307"></a>00307 <span class="comment">// any other key ignore</span>
<a name="l00308"></a>00308 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtNotRecognised,<span class="stringliteral">"\nUnwanted key pressed"</span>);
<a name="l00309"></a>00309 iConsole->Printf(KTxtNotRecognised);
<a name="l00310"></a>00310 iConsole->Printf(KTxtMainInstructions);
<a name="l00311"></a>00311 }
<a name="l00312"></a>00312
<a name="l00314"></a>00314 <span class="comment">//</span>
<a name="l00315"></a>00315 <span class="comment">// -----> TFibonacciEngine (implementation)</span>
<a name="l00316"></a>00316 <span class="comment">//</span>
<a name="l00318"></a>00318 <span class="comment"></span>
<a name="l00319"></a>00319 <span class="keywordtype">void</span> TFibonacciEngine::Calculate (TInt aTerms)
<a name="l00320"></a>00320 {
<a name="l00321"></a>00321 TInt iterations = aTerms ;
<a name="l00322"></a>00322
<a name="l00323"></a>00323 TInt currentTotal = 1 ;
<a name="l00324"></a>00324 TInt previousTotal = 0 ;
<a name="l00325"></a>00325 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtTooManyIterations,<span class="stringliteral">"Too many iterations"</span>);
<a name="l00326"></a>00326 __ASSERT_ALWAYS(iterations<47,User::Panic(KTxtTooManyIterations,iterations));
<a name="l00327"></a>00327
<a name="l00328"></a>00328 <span class="comment">// if limit not yet reached</span>
<a name="l00329"></a>00329 <span class="keywordflow">while</span> (iterations-- > 0)
<a name="l00330"></a>00330 {
<a name="l00331"></a>00331 <span class="comment">// calculate next number in series</span>
<a name="l00332"></a>00332 TInt newTotal = currentTotal + previousTotal ;
<a name="l00333"></a>00333
<a name="l00334"></a>00334 <span class="comment">// update variables</span>
<a name="l00335"></a>00335 previousTotal = currentTotal ;
<a name="l00336"></a>00336 currentTotal = newTotal ;
<a name="l00337"></a>00337
<a name="l00338"></a>00338 <span class="comment">// introduce a delay</span>
<a name="l00339"></a>00339 User::After(1000000) ;
<a name="l00340"></a>00340 }
<a name="l00341"></a>00341
<a name="l00342"></a>00342 iResult = currentTotal ;
<a name="l00343"></a>00343
<a name="l00344"></a>00344 }
<a name="l00345"></a>00345
<a name="l00346"></a>00346
<a name="l00348"></a>00348 <span class="comment">// This section deals with initialisation and ensuring we have a console active</span>
<a name="l00350"></a>00350 <span class="comment"></span>
<a name="l00351"></a>00351 <span class="keywordtype">void</span> doExampleL () ;
<a name="l00352"></a>00352
<a name="l00353"></a>00353 <span class="keywordtype">void</span> SetupConsoleL();
<a name="l00354"></a>00354
<a name="l00355"></a>00355 GLDEF_C TInt E32Main() <span class="comment">// main function called by E32</span>
<a name="l00356"></a>00356 {
<a name="l00357"></a>00357 CTrapCleanup* cleanup=CTrapCleanup::New(); <span class="comment">// get clean-up stack</span>
<a name="l00358"></a>00358 TRAPD(error,SetupConsoleL()); <span class="comment">// more initialization, then do example</span>
<a name="l00359"></a>00359 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtFibonacciExampleError,<span class="stringliteral">"Fibonacci example error"</span>);
<a name="l00360"></a>00360 __ASSERT_ALWAYS(!error,User::Panic(KTxtFibonacciExampleError,error));
<a name="l00361"></a>00361 <span class="keyword">delete</span> cleanup; <span class="comment">// destroy clean-up stack</span>
<a name="l00362"></a>00362 <span class="keywordflow">return</span> 0; <span class="comment">// and return</span>
<a name="l00363"></a>00363 }
<a name="l00364"></a>00364
<a name="l00365"></a>00365 <span class="keywordtype">void</span> SetupConsoleL() <span class="comment">// initialize and call example code under cleanup stack</span>
<a name="l00366"></a>00366 {
<a name="l00367"></a>00367 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtFibSingActObj,<span class="stringliteral">"Single Active Object"</span>);
<a name="l00368"></a>00368 console=Console::NewL(KTxtFibSingActObj, TSize(KConsFullScreen,KConsFullScreen));
<a name="l00369"></a>00369 CleanupStack::PushL(console);
<a name="l00370"></a>00370
<a name="l00371"></a>00371 console->Printf(KTxtMainInstructions) ;
<a name="l00372"></a>00372 TRAPD(error, doExampleL()); <span class="comment">// perform example function</span>
<a name="l00373"></a>00373 <span class="keywordflow">if</span> (error)
<a name="l00374"></a>00374 {
<a name="l00375"></a>00375 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat3,<span class="stringliteral">"failed: leave code=%d"</span>);
<a name="l00376"></a>00376 console->Printf(KFormat3, error);
<a name="l00377"></a>00377 }
<a name="l00378"></a>00378 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPressAnyKey,<span class="stringliteral">"[Press any key to exit]"</span>);
<a name="l00379"></a>00379 console->Printf(KTxtPressAnyKey);
<a name="l00380"></a>00380 console->Getch(); <span class="comment">// get and ignore character</span>
<a name="l00381"></a>00381 CleanupStack::PopAndDestroy(); <span class="comment">// close console</span>
<a name="l00382"></a>00382 }
<a name="l00383"></a>00383
<a name="l00384"></a>00384
<a name="l00386"></a>00386 <span class="comment">//</span>
<a name="l00387"></a>00387 <span class="comment">// Do the example</span>
<a name="l00388"></a>00388 <span class="comment">//</span>
<a name="l00390"></a>00390 <span class="comment"></span><span class="keywordtype">void</span> doExampleL()
<a name="l00391"></a>00391 {
<a name="l00392"></a>00392 <span class="comment">// Construct and install the active scheduler</span>
<a name="l00393"></a>00393 CExampleScheduler* exampleScheduler = <span class="keyword">new</span> (ELeave) CExampleScheduler;
<a name="l00394"></a>00394
<a name="l00395"></a>00395 <span class="comment">// Push onto the cleanup stack</span>
<a name="l00396"></a>00396 CleanupStack::PushL(exampleScheduler);
<a name="l00397"></a>00397
<a name="l00398"></a>00398 <span class="comment">// Install as the active scheduler</span>
<a name="l00399"></a>00399 CActiveScheduler::Install(exampleScheduler);
<a name="l00400"></a>00400
<a name="l00401"></a>00401 <span class="comment">// Create CFibonacciApplication active object.</span>
<a name="l00402"></a>00402 CFibonacciApplication* fibonacci = CFibonacciApplication::NewLC(console);
<a name="l00403"></a>00403
<a name="l00404"></a>00404 <span class="comment">// issue initial request</span>
<a name="l00405"></a>00405 fibonacci->RequestCharacter() ;
<a name="l00406"></a>00406
<a name="l00407"></a>00407 <span class="comment">// Main part of the program:</span>
<a name="l00408"></a>00408 <span class="comment">// wait loop that cycles until ActiveScheduler::Stop called</span>
<a name="l00409"></a>00409 CActiveScheduler::Start();
<a name="l00410"></a>00410
<a name="l00411"></a>00411 <span class="comment">// Remove from the cleanup stack and destroy:</span>
<a name="l00412"></a>00412 <span class="comment">// 1. the CFibonacciApplication active object.</span>
<a name="l00413"></a>00413 <span class="comment">// 2. exampleScheduler</span>
<a name="l00414"></a>00414 CleanupStack::PopAndDestroy();
<a name="l00415"></a>00415 CleanupStack::PopAndDestroy();
<a name="l00416"></a>00416 }
<a name="l00417"></a>00417
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