Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/threadengine_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/ForumNokia/ThreadExample/src/threadengine.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment">* ============================================================================</span>
<a name="l00003"></a>00003 <span class="comment">* Name : CThreadEngine from CThreadEngine.h</span>
<a name="l00004"></a>00004 <span class="comment">* Part of : Thread</span>
<a name="l00005"></a>00005 <span class="comment">* Created : 04.02.2005 by Forum Nokia</span>
<a name="l00006"></a>00006 <span class="comment">* Version : 1.0</span>
<a name="l00007"></a>00007 <span class="comment">* Copyright: Nokia Corporation</span>
<a name="l00008"></a>00008 <span class="comment">* ============================================================================</span>
<a name="l00009"></a>00009 <span class="comment">*/</span>
<a name="l00010"></a>00010
<a name="l00011"></a>00011 <span class="comment">// INCLUDES</span>
<a name="l00012"></a>00012 <span class="preprocessor">#include "..\inc\threadengine.h"</span>
<a name="l00013"></a>00013 <span class="preprocessor">#include "threadappview.h"</span>
<a name="l00014"></a>00014 <span class="preprocessor">#include "threadanimation.h"</span>
<a name="l00015"></a>00015 <span class="preprocessor">#include <thread.rsg></span>
<a name="l00016"></a>00016 <span class="preprocessor">#include <StringLoader.h></span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="comment">// time that threads sleep in ThreadFunction</span>
<a name="l00019"></a>00019 <span class="keyword">const</span> TInt KThreadUpdateInterval = 200000;
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="comment">// resurrect threads after this interval</span>
<a name="l00022"></a>00022 <span class="keyword">const</span> TInt KThreadWatchdogInterval = 5000000;
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00025"></a>00025 <span class="comment">// CThreadEngine::CThreadEngine(void)</span>
<a name="l00026"></a>00026 <span class="comment">//</span>
<a name="l00027"></a>00027 <span class="comment">// constructor</span>
<a name="l00028"></a>00028 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00029"></a>00029 CThreadEngine::CThreadEngine(<span class="keywordtype">void</span>): CTimer(CActive::EPriorityStandard), iNotSynchonizedCounter(0),
<a name="l00030"></a>00030 iSynchronizedCounter(0), iCreatedThreads(EFalse)
<a name="l00031"></a>00031 {
<a name="l00032"></a>00032 <span class="comment">// Create a mutex for synchronization purpose</span>
<a name="l00033"></a>00033 iMutex.CreateLocal();
<a name="l00034"></a>00034
<a name="l00035"></a>00035 }
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00038"></a>00038 <span class="comment">// CThreadEngine::~CThreadEngine(void)</span>
<a name="l00039"></a>00039 <span class="comment">//</span>
<a name="l00040"></a>00040 <span class="comment">// destructor</span>
<a name="l00041"></a>00041 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00042"></a><a class="code" href="class_c_thread_engine.html#a78c4edde0ad6368f8901dd20170ac889">00042</a> <a class="code" href="class_c_thread_engine.html#a78c4edde0ad6368f8901dd20170ac889">CThreadEngine::~CThreadEngine</a>(<span class="keywordtype">void</span>)
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 <span class="comment">// Kill all threads before closing the handles</span>
<a name="l00045"></a>00045 iThreadOne.Kill(KErrNone);
<a name="l00046"></a>00046 iThreadTwo.Kill(KErrNone);
<a name="l00047"></a>00047 iThreadThree.Kill(KErrNone);
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="comment">// Handles should be closed</span>
<a name="l00050"></a>00050 iThreadOne.Close();
<a name="l00051"></a>00051 iThreadTwo.Close();
<a name="l00052"></a>00052 iThreadThree.Close();
<a name="l00053"></a>00053 }
<a name="l00054"></a>00054
<a name="l00055"></a>00055
<a name="l00056"></a><a class="code" href="class_c_thread_engine.html#af36e9899e337766ff0bd7ee9c5080f60">00056</a> <a class="code" href="class_c_thread_engine.html">CThreadEngine</a>* <a class="code" href="class_c_thread_engine.html#af36e9899e337766ff0bd7ee9c5080f60">CThreadEngine::NewL</a>(<a class="code" href="class_c_thread_app_view.html">CThreadAppView</a>* aView)
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 <a class="code" href="class_c_thread_engine.html">CThreadEngine</a>* <span class="keyword">self</span> = <a class="code" href="class_c_thread_engine.html#a311d84662a41a7a2221b8d049eb3d525">CThreadEngine::NewLC</a>(aView);
<a name="l00059"></a>00059 CleanupStack::Pop(<span class="keyword">self</span>);
<a name="l00060"></a>00060 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00061"></a>00061 }
<a name="l00062"></a>00062
<a name="l00063"></a><a class="code" href="class_c_thread_engine.html#a311d84662a41a7a2221b8d049eb3d525">00063</a> <a class="code" href="class_c_thread_engine.html">CThreadEngine</a>* <a class="code" href="class_c_thread_engine.html#a311d84662a41a7a2221b8d049eb3d525">CThreadEngine::NewLC</a>(<a class="code" href="class_c_thread_app_view.html">CThreadAppView</a>* aView)
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 <a class="code" href="class_c_thread_engine.html">CThreadEngine</a>* <span class="keyword">self</span> = <span class="keyword">new</span> (ELeave) <a class="code" href="class_c_thread_engine.html">CThreadEngine</a>;
<a name="l00066"></a>00066 CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00067"></a>00067 <span class="keyword">self</span>->ConstructL(aView);
<a name="l00068"></a>00068 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="comment">// Standard EPOC 2nd phase constructor</span>
<a name="l00072"></a>00072 <span class="keywordtype">void</span> CThreadEngine::ConstructL(<a class="code" href="class_c_thread_app_view.html">CThreadAppView</a>* aView)
<a name="l00073"></a>00073 {
<a name="l00074"></a>00074 CTimer::ConstructL();
<a name="l00075"></a>00075
<a name="l00076"></a>00076 iView = aView;
<a name="l00077"></a>00077 CActiveScheduler::Add( <span class="keyword">this</span> );
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00081"></a>00081 <span class="comment">// CThreadEngine::StartL()</span>
<a name="l00082"></a>00082 <span class="comment">//</span>
<a name="l00083"></a>00083 <span class="comment">// Create threads and start Timer that resurrects threads. </span>
<a name="l00084"></a>00084 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00085"></a><a class="code" href="class_c_thread_engine.html#a0bfcabc0c045354d389f61d355ca0490">00085</a> <span class="keywordtype">void</span> <a class="code" href="class_c_thread_engine.html#a0bfcabc0c045354d389f61d355ca0490">CThreadEngine::StartL</a>()
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 <span class="comment">// Create threads only once</span>
<a name="l00088"></a>00088 <span class="keywordflow">if</span> ( iCreatedThreads == EFalse )
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 <a class="code" href="class_c_thread_engine.html#ad53a8e971af48dd561844863a5ff3888">CreateThreadsL</a>();
<a name="l00091"></a>00091 After( KThreadWatchdogInterval );
<a name="l00092"></a>00092 }
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00096"></a>00096 <span class="comment">// CThreadEngine::RunL()</span>
<a name="l00097"></a>00097 <span class="comment">//</span>
<a name="l00098"></a>00098 <span class="comment">// Check that all threads are alive, if not then create and resume them again.</span>
<a name="l00099"></a>00099 <span class="comment">// After resuming, continue the thread animation.</span>
<a name="l00100"></a>00100 <span class="comment">// Called by the active scheduler when a request completion event occurs.</span>
<a name="l00101"></a>00101 <span class="comment">// ExitType can be used to check thread state ( killed / panicked / alive )</span>
<a name="l00102"></a>00102 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00103"></a><a class="code" href="class_c_thread_engine.html#aec36044be34b754c06dc98a9c2836fdb">00103</a> <span class="keywordtype">void</span> <a class="code" href="class_c_thread_engine.html#aec36044be34b754c06dc98a9c2836fdb">CThreadEngine::RunL</a>()
<a name="l00104"></a>00104 {
<a name="l00105"></a>00105
<a name="l00106"></a>00106 <span class="comment">// Has thread one been killed?</span>
<a name="l00107"></a>00107 <span class="keywordflow">if</span> ( iThreadOne.ExitType() == EExitKill )
<a name="l00108"></a>00108 {
<a name="l00109"></a>00109 HBufC* threadWasKilled = StringLoader::LoadLC( R_THREAD1_WAS_KILLED );
<a name="l00110"></a>00110 iView-><a class="code" href="class_c_thread_app_view.html#adfff519017801b286a339fb4bafae139">DrawText</a>( *threadWasKilled );
<a name="l00111"></a>00111 CleanupStack::PopAndDestroy( threadWasKilled );
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="comment">// Closing the handle finalises thread deconstructing. Thread with</span>
<a name="l00114"></a>00114 <span class="comment">// same name can be opened aftewards. Without closing the handle new unique</span>
<a name="l00115"></a>00115 <span class="comment">// name must be used. </span>
<a name="l00116"></a>00116 iThreadOne.Close();
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="comment">// Create a new thread because earlier was killed</span>
<a name="l00119"></a>00119 <span class="keywordflow">if</span> ( iThreadOne.Create( _L(<span class="stringliteral">"thread1"</span>), <a class="code" href="class_c_thread_engine.html#ab8dd5de1ec65da63b17fc87dd402f07b">ExecuteThreadOne</a>, 4096, KMinHeapSize,
<a name="l00120"></a>00120 256*KMinHeapSize, &iNotSynchonizedCounter) != KErrNone )
<a name="l00121"></a>00121 {
<a name="l00122"></a>00122 <span class="comment">// Create failed. This should not happen.</span>
<a name="l00123"></a>00123 HBufC* threadCreateFailureText = StringLoader::LoadLC( R_THREAD1_CREATE_FAILURE );
<a name="l00124"></a>00124 iView-><a class="code" href="class_c_thread_app_view.html#adfff519017801b286a339fb4bafae139">DrawText</a>( *threadCreateFailureText );
<a name="l00125"></a>00125 CleanupStack::PopAndDestroy( threadCreateFailureText);
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127 <span class="keywordflow">else</span>
<a name="l00128"></a>00128 {
<a name="l00129"></a>00129 <span class="comment">// Start newly created thread</span>
<a name="l00130"></a>00130 iThreadOne.Resume();
<a name="l00131"></a>00131 <span class="comment">// Start the threadOne animation</span>
<a name="l00132"></a>00132 iView->iAnimationOne-><a class="code" href="class_c_thread_animation.html#a25c3d4648dd8cc0e258173341c2b21ce">StartAnimationL</a>();
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135
<a name="l00136"></a>00136 <span class="comment">// Has thread two been killed?</span>
<a name="l00137"></a>00137 <span class="keywordflow">if</span> ( iThreadTwo.ExitType() == EExitKill )
<a name="l00138"></a>00138 {
<a name="l00139"></a>00139 HBufC* threadWasKilled = StringLoader::LoadLC( R_THREAD2_WAS_KILLED );
<a name="l00140"></a>00140 iView-><a class="code" href="class_c_thread_app_view.html#adfff519017801b286a339fb4bafae139">DrawText</a>( *threadWasKilled );
<a name="l00141"></a>00141 CleanupStack::PopAndDestroy( threadWasKilled );
<a name="l00142"></a>00142
<a name="l00143"></a>00143 iThreadTwo.Close();
<a name="l00144"></a>00144
<a name="l00145"></a>00145 <span class="comment">// Create a new thread because earlier was killed</span>
<a name="l00146"></a>00146 <span class="keywordflow">if</span> ( KErrNone != iThreadTwo.Create( _L(<span class="stringliteral">"thread2"</span>) , <a class="code" href="class_c_thread_engine.html#ad2122547b95714aa7dea18f28e77ca14">ExecuteThreadTwo</a>, 4096, KMinHeapSize,
<a name="l00147"></a>00147 256*KMinHeapSize, <span class="keyword">this</span> ) )
<a name="l00148"></a>00148 {
<a name="l00149"></a>00149 <span class="comment">// Create failed. This should not happen.</span>
<a name="l00150"></a>00150 HBufC* threadCreateFailureText = StringLoader::LoadLC( R_THREAD2_CREATE_FAILURE );
<a name="l00151"></a>00151 iView-><a class="code" href="class_c_thread_app_view.html#adfff519017801b286a339fb4bafae139">DrawText</a>( *threadCreateFailureText );
<a name="l00152"></a>00152 CleanupStack::PopAndDestroy( threadCreateFailureText);
<a name="l00153"></a>00153 }
<a name="l00154"></a>00154 <span class="keywordflow">else</span>
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156 <span class="comment">// Start newly created thread</span>
<a name="l00157"></a>00157 iThreadTwo.Resume();
<a name="l00158"></a>00158 iView->iAnimationTwo-><a class="code" href="class_c_thread_animation.html#a25c3d4648dd8cc0e258173341c2b21ce">StartAnimationL</a>();
<a name="l00159"></a>00159 }
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="comment">// Has thread three been killed?</span>
<a name="l00163"></a>00163 <span class="keywordflow">if</span> ( iThreadThree.ExitType() == EExitKill )
<a name="l00164"></a>00164 {
<a name="l00165"></a>00165 HBufC* threadWasKilled = StringLoader::LoadLC( R_THREAD3_WAS_KILLED );
<a name="l00166"></a>00166 iView-><a class="code" href="class_c_thread_app_view.html#adfff519017801b286a339fb4bafae139">DrawText</a>( *threadWasKilled );
<a name="l00167"></a>00167 CleanupStack::PopAndDestroy( threadWasKilled );
<a name="l00168"></a>00168
<a name="l00169"></a>00169 iThreadThree.Close();
<a name="l00170"></a>00170
<a name="l00171"></a>00171 <span class="comment">// Create a new thread because earlier was killed</span>
<a name="l00172"></a>00172 <span class="keywordflow">if</span> ( KErrNone != iThreadThree.Create( _L(<span class="stringliteral">"thread3"</span>) , <a class="code" href="class_c_thread_engine.html#a12d8af3f0da569111fe99ebb4101f7b4">ExecuteThreadThree</a>, 4096, KMinHeapSize,
<a name="l00173"></a>00173 256*KMinHeapSize, <span class="keyword">this</span>) )
<a name="l00174"></a>00174 {
<a name="l00175"></a>00175 <span class="comment">// Create failed. This should not happen.</span>
<a name="l00176"></a>00176 HBufC* threadCreateFailureText = StringLoader::LoadLC( R_THREAD1_CREATE_FAILURE );
<a name="l00177"></a>00177 iView-><a class="code" href="class_c_thread_app_view.html#adfff519017801b286a339fb4bafae139">DrawText</a>( *threadCreateFailureText );
<a name="l00178"></a>00178 CleanupStack::PopAndDestroy( threadCreateFailureText );
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180 <span class="keywordflow">else</span>
<a name="l00181"></a>00181 {
<a name="l00182"></a>00182 <span class="comment">// Start newly created thread</span>
<a name="l00183"></a>00183 iThreadThree.Resume();
<a name="l00184"></a>00184 iView->iAnimationThree-><a class="code" href="class_c_thread_animation.html#a25c3d4648dd8cc0e258173341c2b21ce">StartAnimationL</a>();
<a name="l00185"></a>00185 }
<a name="l00186"></a>00186 }
<a name="l00187"></a>00187
<a name="l00188"></a>00188 <span class="comment">// Wait for a while and run the same function again </span>
<a name="l00189"></a>00189 After( KThreadWatchdogInterval );
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191
<a name="l00192"></a>00192 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00193"></a>00193 <span class="comment">// CThreadEngine::DoCancel()</span>
<a name="l00194"></a>00194 <span class="comment">//</span>
<a name="l00195"></a>00195 <span class="comment">// Cancel and stop the timer. </span>
<a name="l00196"></a>00196 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00197"></a><a class="code" href="class_c_thread_engine.html#a48334d697168092a5e7be817e45fd176">00197</a> <span class="keywordtype">void</span> <a class="code" href="class_c_thread_engine.html#a48334d697168092a5e7be817e45fd176">CThreadEngine::DoCancel</a>()
<a name="l00198"></a>00198 {
<a name="l00199"></a>00199 Cancel();
<a name="l00200"></a>00200 }
<a name="l00201"></a>00201
<a name="l00202"></a>00202 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00203"></a>00203 <span class="comment">// CThreadEngine::RunError(TInt)</span>
<a name="l00204"></a>00204 <span class="comment">//</span>
<a name="l00205"></a>00205 <span class="comment">// Cancel and stop the timer. </span>
<a name="l00206"></a>00206 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00207"></a><a class="code" href="class_c_thread_engine.html#a7768311c64d094ac44485243026b6e46">00207</a> TInt <a class="code" href="class_c_thread_engine.html#a7768311c64d094ac44485243026b6e46">CThreadEngine::RunError</a>(TInt)
<a name="l00208"></a>00208 {
<a name="l00209"></a>00209 <span class="keywordflow">return</span> KErrNone;
<a name="l00210"></a>00210 }
<a name="l00211"></a>00211
<a name="l00212"></a>00212 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00213"></a>00213 <span class="comment">// CThreadEngine::ThreadKilledText(const TDesC& aText, TInt aCount)</span>
<a name="l00214"></a>00214 <span class="comment">//</span>
<a name="l00215"></a>00215 <span class="comment">// Print text and a number after thread has been killed. Count reflects </span>
<a name="l00216"></a>00216 <span class="comment">// how long thread was running. TempValue is needed for TInt to TDesC </span>
<a name="l00217"></a>00217 <span class="comment">// conversion</span>
<a name="l00218"></a>00218 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00219"></a>00219 <span class="keywordtype">void</span> CThreadEngine::ThreadKilledText(<span class="keyword">const</span> TDesC& aText, TInt aCount)
<a name="l00220"></a>00220 {
<a name="l00221"></a>00221 TBuf<50> tempBuf;
<a name="l00222"></a>00222
<a name="l00223"></a>00223 tempBuf.Append( aText );
<a name="l00224"></a>00224 tempBuf.AppendNum( aCount );
<a name="l00225"></a>00225 iView-><a class="code" href="class_c_thread_app_view.html#adfff519017801b286a339fb4bafae139">DrawText</a>( tempBuf );
<a name="l00226"></a>00226 }
<a name="l00227"></a>00227
<a name="l00228"></a>00228 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00229"></a>00229 <span class="comment">// CThreadEngine::KillThread(TInt aThreadCount)</span>
<a name="l00230"></a>00230 <span class="comment">//</span>
<a name="l00231"></a>00231 <span class="comment">// Kill threadOne (1) / threadTwo (2) / threadThree (3)</span>
<a name="l00232"></a>00232 <span class="comment">// and draw text that a thread has been killed. Stops animation</span>
<a name="l00233"></a>00233 <span class="comment">// after killing. Resets counters.</span>
<a name="l00234"></a>00234 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00235"></a><a class="code" href="class_c_thread_engine.html#a222c982a5bc397dfa3fd17ea37ce4dda">00235</a> <span class="keywordtype">void</span> <a class="code" href="class_c_thread_engine.html#a222c982a5bc397dfa3fd17ea37ce4dda">CThreadEngine::KillThread</a>(TInt aThreadCount)
<a name="l00236"></a>00236 {
<a name="l00237"></a>00237 <span class="comment">//Do not kill before threads have been created</span>
<a name="l00238"></a>00238 <span class="keywordflow">if</span> ( iCreatedThreads == EFalse )
<a name="l00239"></a>00239 {
<a name="l00240"></a>00240 <span class="keywordflow">return</span>;
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242
<a name="l00243"></a>00243 HBufC* killedText;
<a name="l00244"></a>00244
<a name="l00245"></a>00245 <span class="keywordflow">switch</span>( aThreadCount )
<a name="l00246"></a>00246 {
<a name="l00247"></a>00247 <span class="keywordflow">case</span> 1:
<a name="l00248"></a>00248 <span class="comment">// Thread can be killed because handle is connected to it.</span>
<a name="l00249"></a>00249 iThreadOne.Kill(KErrNone);
<a name="l00250"></a>00250
<a name="l00251"></a>00251 killedText = StringLoader::LoadLC(R_KILLED_THREAD1);
<a name="l00252"></a>00252 ThreadKilledText( *killedText, iNotSynchonizedCounter);
<a name="l00253"></a>00253 CleanupStack::PopAndDestroy(killedText);
<a name="l00254"></a>00254
<a name="l00255"></a>00255 iNotSynchonizedCounter = 0;
<a name="l00256"></a>00256
<a name="l00257"></a>00257 iView->iAnimationOne-><a class="code" href="class_c_thread_animation.html#a27125fb245b96ac2d4d3f7ef6231ed2a">StopAnimation</a>();
<a name="l00258"></a>00258
<a name="l00259"></a>00259 <span class="keywordflow">break</span>;
<a name="l00260"></a>00260 <span class="keywordflow">case</span> 2:
<a name="l00261"></a>00261 iThreadTwo.Kill(KErrNone);
<a name="l00262"></a>00262
<a name="l00263"></a>00263 killedText = StringLoader::LoadLC(R_KILLED_THREAD2);
<a name="l00264"></a>00264 ThreadKilledText( *killedText, iSynchronizedCounter);
<a name="l00265"></a>00265 CleanupStack::PopAndDestroy(killedText);
<a name="l00266"></a>00266
<a name="l00267"></a>00267 <span class="comment">// Reset counter</span>
<a name="l00268"></a>00268 <a class="code" href="class_c_thread_engine.html#af3982a90e967a486bde825f5aa2ddc55">SetSyncValue</a>(0);
<a name="l00269"></a>00269
<a name="l00270"></a>00270 iView->iAnimationTwo-><a class="code" href="class_c_thread_animation.html#a27125fb245b96ac2d4d3f7ef6231ed2a">StopAnimation</a>();
<a name="l00271"></a>00271
<a name="l00272"></a>00272 <span class="keywordflow">break</span>;
<a name="l00273"></a>00273 <span class="keywordflow">case</span> 3:
<a name="l00274"></a>00274 iThreadThree.Kill(KErrNone);
<a name="l00275"></a>00275
<a name="l00276"></a>00276 killedText = StringLoader::LoadLC(R_KILLED_THREAD3);
<a name="l00277"></a>00277 ThreadKilledText( *killedText, iSynchronizedCounter );
<a name="l00278"></a>00278 CleanupStack::PopAndDestroy( killedText );
<a name="l00279"></a>00279
<a name="l00280"></a>00280 <span class="comment">// Reset counter</span>
<a name="l00281"></a>00281 <a class="code" href="class_c_thread_engine.html#af3982a90e967a486bde825f5aa2ddc55">SetSyncValue</a>(0);
<a name="l00282"></a>00282
<a name="l00283"></a>00283 iView->iAnimationThree-><a class="code" href="class_c_thread_animation.html#a27125fb245b96ac2d4d3f7ef6231ed2a">StopAnimation</a>();
<a name="l00284"></a>00284 <span class="keywordflow">break</span>;
<a name="l00285"></a>00285 }
<a name="l00286"></a>00286 }
<a name="l00287"></a>00287
<a name="l00288"></a>00288 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00289"></a>00289 <span class="comment">// CThreadEngine::ExecuteThread(TAny *aPtr)</span>
<a name="l00290"></a>00290 <span class="comment">//</span>
<a name="l00291"></a>00291 <span class="comment">// Threadfunction of threadOne. Executed only by threadOne.</span>
<a name="l00292"></a>00292 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00293"></a><a class="code" href="class_c_thread_engine.html#ab8dd5de1ec65da63b17fc87dd402f07b">00293</a> TInt <a class="code" href="class_c_thread_engine.html#ab8dd5de1ec65da63b17fc87dd402f07b">CThreadEngine::ExecuteThreadOne</a>(TAny *aPtr)
<a name="l00294"></a>00294 {
<a name="l00295"></a>00295 <span class="comment">// Convert pointer</span>
<a name="l00296"></a>00296 TInt* notSync = <span class="keyword">static_cast<</span>TInt*<span class="keyword">></span>(aPtr);
<a name="l00297"></a>00297
<a name="l00298"></a>00298 TBool loopConditionOne = ETrue;
<a name="l00299"></a>00299 <span class="keywordflow">while</span> ( loopConditionOne )
<a name="l00300"></a>00300 {
<a name="l00301"></a>00301 <span class="comment">// iNotSynchonizedCounter++, synhronization is not needed because</span>
<a name="l00302"></a>00302 <span class="comment">// only this thread changes iNotSynchronizedCount value.</span>
<a name="l00303"></a>00303 *notSync = *notSync + 1;
<a name="l00304"></a>00304 <span class="comment">// Wait for a while</span>
<a name="l00305"></a>00305 User::After( KThreadUpdateInterval );
<a name="l00306"></a>00306 }
<a name="l00307"></a>00307
<a name="l00308"></a>00308 <span class="keywordflow">return</span> KErrNone;
<a name="l00309"></a>00309 }
<a name="l00310"></a>00310
<a name="l00311"></a>00311 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00312"></a>00312 <span class="comment">// CThreadEngine::ExecuteThreadTwo(TAny *aPtr)</span>
<a name="l00313"></a>00313 <span class="comment">//</span>
<a name="l00314"></a>00314 <span class="comment">// Threadfunction of threadTwo. Executed only by threadTwo.</span>
<a name="l00315"></a>00315 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00316"></a><a class="code" href="class_c_thread_engine.html#ad2122547b95714aa7dea18f28e77ca14">00316</a> TInt <a class="code" href="class_c_thread_engine.html#ad2122547b95714aa7dea18f28e77ca14">CThreadEngine::ExecuteThreadTwo</a>(TAny *aPtr)
<a name="l00317"></a>00317 {
<a name="l00318"></a>00318 <span class="comment">// Convert pointer</span>
<a name="l00319"></a>00319 <a class="code" href="class_c_thread_engine.html">CThreadEngine</a>* engine = <span class="keyword">static_cast<</span><a class="code" href="class_c_thread_engine.html">CThreadEngine</a>*<span class="keyword">></span>(aPtr);
<a name="l00320"></a>00320
<a name="l00321"></a>00321 TBool loopConditionTwo = ETrue;
<a name="l00322"></a>00322 <span class="keywordflow">while</span> ( loopConditionTwo )
<a name="l00323"></a>00323 {
<a name="l00324"></a>00324 <span class="comment">// iSynchronizedCounter++;</span>
<a name="l00325"></a>00325 <span class="comment">// The counter is not handled directly, because two threads</span>
<a name="l00326"></a>00326 <span class="comment">// interact with the same variable. Synchronization is needed.</span>
<a name="l00327"></a>00327 engine-><a class="code" href="class_c_thread_engine.html#af3982a90e967a486bde825f5aa2ddc55">SetSyncValue</a>(engine-><a class="code" href="class_c_thread_engine.html#a7f6b1665b605dcf900473bce9a9191b9">GetSyncValue</a>()+1);
<a name="l00328"></a>00328 User::After( KThreadUpdateInterval );
<a name="l00329"></a>00329 }
<a name="l00330"></a>00330
<a name="l00331"></a>00331 <span class="keywordflow">return</span> KErrNone;
<a name="l00332"></a>00332 }
<a name="l00333"></a>00333
<a name="l00334"></a>00334 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00335"></a>00335 <span class="comment">// CThreadEngine::ExecuteThreadThree(TAny *aPtr)</span>
<a name="l00336"></a>00336 <span class="comment">//</span>
<a name="l00337"></a>00337 <span class="comment">// Threadfunction of threadThree. Executed only by threadThree.</span>
<a name="l00338"></a>00338 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00339"></a><a class="code" href="class_c_thread_engine.html#a12d8af3f0da569111fe99ebb4101f7b4">00339</a> TInt <a class="code" href="class_c_thread_engine.html#a12d8af3f0da569111fe99ebb4101f7b4">CThreadEngine::ExecuteThreadThree</a>(TAny *aPtr)
<a name="l00340"></a>00340 {
<a name="l00341"></a>00341 <a class="code" href="class_c_thread_engine.html">CThreadEngine</a>* engine = <span class="keyword">static_cast<</span><a class="code" href="class_c_thread_engine.html">CThreadEngine</a>*<span class="keyword">></span>(aPtr);
<a name="l00342"></a>00342
<a name="l00343"></a>00343 TBool loopConditionThree = ETrue;
<a name="l00344"></a>00344 <span class="keywordflow">while</span> ( loopConditionThree )
<a name="l00345"></a>00345 {
<a name="l00346"></a>00346 <span class="comment">// iSynchronizedCounter++;</span>
<a name="l00347"></a>00347 <span class="comment">// The counter is not handled directly, because two threads</span>
<a name="l00348"></a>00348 <span class="comment">// interact with the same variable. Synchronization is needed.</span>
<a name="l00349"></a>00349 engine-><a class="code" href="class_c_thread_engine.html#af3982a90e967a486bde825f5aa2ddc55">SetSyncValue</a>(engine-><a class="code" href="class_c_thread_engine.html#a7f6b1665b605dcf900473bce9a9191b9">GetSyncValue</a>()+1);
<a name="l00350"></a>00350 User::After( KThreadUpdateInterval );
<a name="l00351"></a>00351 }
<a name="l00352"></a>00352
<a name="l00353"></a>00353 <span class="keywordflow">return</span> KErrNone;
<a name="l00354"></a>00354 }
<a name="l00355"></a>00355
<a name="l00356"></a>00356 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00357"></a>00357 <span class="comment">// CThreadEngine::SetSyncValue(TInt aValue)</span>
<a name="l00358"></a>00358 <span class="comment">//</span>
<a name="l00359"></a>00359 <span class="comment">// Set the iSynchronizedCounter value. Synchronization is implemented by using</span>
<a name="l00360"></a>00360 <span class="comment">// a semaphore. Function is thread-safe.</span>
<a name="l00361"></a>00361 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00362"></a><a class="code" href="class_c_thread_engine.html#af3982a90e967a486bde825f5aa2ddc55">00362</a> <span class="keywordtype">void</span> <a class="code" href="class_c_thread_engine.html#af3982a90e967a486bde825f5aa2ddc55">CThreadEngine::SetSyncValue</a>(TInt aValue)
<a name="l00363"></a>00363 {
<a name="l00364"></a>00364 iMutex.Wait();
<a name="l00365"></a>00365 iSynchronizedCounter = aValue;
<a name="l00366"></a>00366 iMutex.Signal();
<a name="l00367"></a>00367 }
<a name="l00368"></a>00368
<a name="l00369"></a>00369 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00370"></a>00370 <span class="comment">// CThreadEngine::GetSyncValue() const</span>
<a name="l00371"></a>00371 <span class="comment">//</span>
<a name="l00372"></a>00372 <span class="comment">// Returns iSynchronizedCounter. </span>
<a name="l00373"></a>00373 <span class="comment">// </span>
<a name="l00374"></a>00374 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00375"></a><a class="code" href="class_c_thread_engine.html#a7f6b1665b605dcf900473bce9a9191b9">00375</a> TInt <a class="code" href="class_c_thread_engine.html#a7f6b1665b605dcf900473bce9a9191b9">CThreadEngine::GetSyncValue</a>()<span class="keyword"> const</span>
<a name="l00376"></a>00376 <span class="keyword"> </span>{
<a name="l00377"></a>00377 <span class="keywordflow">return</span> iSynchronizedCounter;
<a name="l00378"></a>00378 }
<a name="l00379"></a>00379
<a name="l00380"></a>00380 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00381"></a>00381 <span class="comment">// CThreadEngine::CreateThreadsL()</span>
<a name="l00382"></a>00382 <span class="comment">//</span>
<a name="l00383"></a>00383 <span class="comment">// Create three threads and resume them. Start thread animations.</span>
<a name="l00384"></a>00384 <span class="comment">// </span>
<a name="l00385"></a>00385 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00386"></a><a class="code" href="class_c_thread_engine.html#ad53a8e971af48dd561844863a5ff3888">00386</a> <span class="keywordtype">void</span> <a class="code" href="class_c_thread_engine.html#ad53a8e971af48dd561844863a5ff3888">CThreadEngine::CreateThreadsL</a>()
<a name="l00387"></a>00387 {
<a name="l00388"></a>00388 <span class="comment">//Create thread1</span>
<a name="l00389"></a>00389 iThreadOne.Create( _L(<span class="stringliteral">"thread1"</span>) , <a class="code" href="class_c_thread_engine.html#ab8dd5de1ec65da63b17fc87dd402f07b">ExecuteThreadOne</a>, 4096, KMinHeapSize, 256*KMinHeapSize,
<a name="l00390"></a>00390 &iNotSynchonizedCounter);
<a name="l00391"></a>00391 iThreadOne.Resume();
<a name="l00392"></a>00392 iView->iAnimationOne-><a class="code" href="class_c_thread_animation.html#a25c3d4648dd8cc0e258173341c2b21ce">StartAnimationL</a>();
<a name="l00393"></a>00393
<a name="l00394"></a>00394 <span class="comment">// Create thread2</span>
<a name="l00395"></a>00395 <span class="comment">// thread two and three modify same counter, that is why a pointer to this class is given,</span>
<a name="l00396"></a>00396 <span class="comment">// not the counter itself. Threads modify iSynchronizedCounter through two CThreadEngine </span>
<a name="l00397"></a>00397 <span class="comment">// functions: GetSyncValue() / SetSyncValue(). Thread2 gets a pointer to CThreadEngine,</span>
<a name="l00398"></a>00398 <span class="comment">// because it must use synchronized funtions to increment the counter.</span>
<a name="l00399"></a>00399 iThreadTwo.Create( _L(<span class="stringliteral">"thread2"</span>) , <a class="code" href="class_c_thread_engine.html#ad2122547b95714aa7dea18f28e77ca14">ExecuteThreadTwo</a>, 4096, KMinHeapSize, 256*KMinHeapSize,
<a name="l00400"></a>00400 <span class="keyword">this</span>);
<a name="l00401"></a>00401 iThreadTwo.Resume();
<a name="l00402"></a>00402 iView->iAnimationTwo-><a class="code" href="class_c_thread_animation.html#a25c3d4648dd8cc0e258173341c2b21ce">StartAnimationL</a>();
<a name="l00403"></a>00403
<a name="l00404"></a>00404 <span class="comment">//Create thread3</span>
<a name="l00405"></a>00405 iThreadThree.Create(_L(<span class="stringliteral">"thread3"</span>) , <a class="code" href="class_c_thread_engine.html#a12d8af3f0da569111fe99ebb4101f7b4">ExecuteThreadThree</a>, 4096, KMinHeapSize, 256*KMinHeapSize,
<a name="l00406"></a>00406 <span class="keyword">this</span> );
<a name="l00407"></a>00407 iThreadThree.Resume();
<a name="l00408"></a>00408 iView->iAnimationThree-><a class="code" href="class_c_thread_animation.html#a25c3d4648dd8cc0e258173341c2b21ce">StartAnimationL</a>();
<a name="l00409"></a>00409
<a name="l00410"></a>00410 <span class="comment">// All threads have been now created. Threads can be killed.</span>
<a name="l00411"></a>00411 iCreatedThreads = ETrue;
<a name="l00412"></a>00412 }
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