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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/condvarlocal_8cpp_source.html
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Tue, 30 Mar 2010 16:16:55 +0100
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>TB9.2 Example Applications: examples/Base/IPC/condvar/condvarlocal/src/condvarlocal.cpp Source File</title>
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<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<link href="doxygen.css" rel="stylesheet" type="text/css"/>
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</head>
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<body>
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<!-- Generated by Doxygen 1.6.2 -->
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<h1>examples/Base/IPC/condvar/condvarlocal/src/condvarlocal.cpp</h1><a href="condvarlocal_8cpp.html">Go to the documentation of this file.</a><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>
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<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
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<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
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<a name="l00004"></a>00004 <span class="comment">// under the terms of &quot;Eclipse Public License v1.0&quot;</span>
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<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
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<a name="l00006"></a>00006 <span class="comment">// at the URL &quot;http://www.eclipse.org/legal/epl-v10.html&quot;.</span>
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<a name="l00007"></a>00007 <span class="comment">//</span>
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<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
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<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
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<a name="l00010"></a>00010 <span class="comment">//</span>
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<a name="l00011"></a>00011 <span class="comment">// Contributors:</span>
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<a name="l00012"></a>00012 <span class="comment">//</span>
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<a name="l00013"></a>00013 <span class="comment">// Description:</span>
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<a name="l00014"></a>00014 <span class="comment">// Contains the E32Main() function, which executes the example.</span>
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<a name="l00015"></a>00015 <span class="comment">// The example demonstrates the use of local condition variable IPC mechanism. The threads created in the process use this condition variable to co-operate with each other.</span>
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<a name="l00016"></a>00016 <span class="comment">// The example performs the following tasks:</span>
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<a name="l00017"></a>00017 <span class="comment">// - create an object of the CQueue class, which in turn crates a queue of integer tokens</span>
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<a name="l00018"></a>00018 <span class="comment">// - create an object of the CProducer class, which in turn creates the producer thread</span>
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<a name="l00019"></a>00019 <span class="comment">// - create an object of the CConsumer class, which in turn creates the consumer thread</span>
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<a name="l00020"></a>00020 <span class="comment">// - create an object of the CUserInterface class ,which accepts asynchronous key press events from the console.</span>
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<a name="l00021"></a>00021 <span class="comment">// The CUserInterface class provides an interface for the user to interact with the threads created in the example.</span>
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<a name="l00022"></a>00022 <span class="comment">// The CQueue::iCondVar is the local condition varaibale that is used by the two threads to co-operate with each other.</span>
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<a name="l00023"></a>00023 <span class="comment">//</span>
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<a name="l00024"></a>00024
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<a name="l00025"></a>00025
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<a name="l00026"></a>00026
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<a name="l00035"></a>00035 <span class="preprocessor">#include &quot;<a class="code" href="globals_8h.html">globals.h</a>&quot;</span>
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<a name="l00036"></a>00036 <span class="preprocessor">#include &quot;<a class="code" href="queue_8h.html">queue.h</a>&quot;</span>
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<a name="l00037"></a>00037 <span class="preprocessor">#include &quot;<a class="code" href="producer_8h.html">producer.h</a>&quot;</span>
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<a name="l00038"></a>00038 <span class="preprocessor">#include &quot;<a class="code" href="consumer_8h.html">consumer.h</a>&quot;</span>
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<a name="l00039"></a>00039 <span class="preprocessor">#include &quot;<a class="code" href="_i_p_c_2condvar_2condvarlocal_2inc_2userinterface_8h.html">userinterface.h</a>&quot;</span>
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<a name="l00040"></a>00040
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<a name="l00041"></a>00041 LOCAL_D CConsoleBase* console;
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<a name="l00042"></a>00042 LOCAL_C <span class="keywordtype">void</span> DoExampleL();
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<a name="l00043"></a>00043 LOCAL_C <span class="keywordtype">void</span> callExampleL();
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<a name="l00044"></a>00044
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<a name="l00045"></a>00045 LOCAL_C <span class="keywordtype">void</span> DoExampleL()
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<a name="l00046"></a>00046         {
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<a name="l00047"></a>00047         CActiveScheduler* scheduler = <span class="keyword">new</span> (ELeave) CActiveScheduler();
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<a name="l00048"></a>00048         CleanupStack::PushL(scheduler);
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<a name="l00049"></a>00049         CActiveScheduler::Install(scheduler);
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<a name="l00050"></a>00050
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<a name="l00051"></a>00051         <span class="comment">// Create an object of the CQueue class.</span>
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<a name="l00052"></a>00052         <a class="code" href="class_c_queue.html">CQueue</a>* tokens = <a class="code" href="class_c_queue.html#a2c3c0bae6b0e6aaa10df8fb51dfb7e30">CQueue::NewL</a>();
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<a name="l00053"></a>00053         CleanupStack::PushL(tokens);
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<a name="l00054"></a>00054
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<a name="l00055"></a>00055         <span class="comment">// Print the KTextInvokeProducer string and wait for a key press.</span>
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<a name="l00056"></a>00056         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextInvokeProducer,<span class="stringliteral">&quot;Creating and starting the Producer Thread...[This produces a token every two seconds]\n&quot;</span>);
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<a name="l00057"></a>00057         console-&gt;Printf(KTextInvokeProducer);
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<a name="l00058"></a>00058         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPressAnyKeyToContinue,<span class="stringliteral">&quot;[press any key to continue]\n&quot;</span>);
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<a name="l00059"></a>00059         console-&gt;Printf(KTxtPressAnyKeyToContinue);
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<a name="l00060"></a>00060         console-&gt;Getch();
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<a name="l00061"></a>00061         <span class="comment">// Create an object of the CProducer class.</span>
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<a name="l00062"></a>00062         <a class="code" href="class_c_producer.html">CProducer</a>* prod = <a class="code" href="class_c_producer.html#a3897c9436f1aae1654b3ae1c5a4b6673">CProducer::NewL</a>(console,tokens);
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<a name="l00063"></a>00063         CleanupStack::PushL(prod);
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<a name="l00064"></a>00064
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<a name="l00065"></a>00065         <span class="comment">// Print the KTextInvokeConsumer string and wait for a key press.</span>
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<a name="l00066"></a>00066         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextInvokeConsumer,<span class="stringliteral">&quot;Creating and starting the Consumer Thread...[This consumes a token every second]\n&quot;</span>);
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<a name="l00067"></a>00067         console-&gt;Printf(KTextInvokeConsumer);
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<a name="l00068"></a>00068         console-&gt;Printf(KTxtPressAnyKeyToContinue);
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<a name="l00069"></a>00069         console-&gt;Getch();
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<a name="l00070"></a>00070
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<a name="l00071"></a>00071         <span class="comment">// Create an object of the CConsumer class.</span>
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<a name="l00072"></a>00072         <a class="code" href="class_c_consumer.html">CConsumer</a>* cons = <a class="code" href="class_c_consumer.html#a7ba476d5a42cbd16448b540867bd141b">CConsumer::NewL</a>(console,tokens);
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<a name="l00073"></a>00073         CleanupStack::PushL(cons);
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<a name="l00074"></a>00074
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<a name="l00075"></a>00075         <span class="comment">// Create an object of the CUserInterface class.</span>
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<a name="l00076"></a>00076         <span class="comment">// This handles key press requests from the console.</span>
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<a name="l00077"></a>00077         <a class="code" href="class_c_user_interface.html">CUserInterface</a>* ui = <a class="code" href="class_c_user_interface.html#acb29c660858994d24137bb413fee4af8">CUserInterface::NewL</a>(console,prod);
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<a name="l00078"></a>00078         CleanupStack::PushL(ui);
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<a name="l00079"></a>00079
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<a name="l00080"></a>00080         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextStartAS,<span class="stringliteral">&quot;Starting the active scheduler...\n&quot;</span>);
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<a name="l00081"></a>00081         console-&gt;Printf(KTextStartAS);
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<a name="l00082"></a>00082         <span class="comment">// Issue an asynchronous read request.</span>
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<a name="l00083"></a>00083         ui-&gt;<a class="code" href="class_c_user_interface.html#a9f9158c56f74b7c8da6c527f346c9952">ReadFunc</a>();
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<a name="l00084"></a>00084         <span class="comment">// Start the active scheduler.</span>
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<a name="l00085"></a>00085         CActiveScheduler::Start();
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<a name="l00086"></a>00086
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<a name="l00087"></a>00087         CleanupStack::PopAndDestroy(5,scheduler);
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<a name="l00088"></a>00088         }
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<a name="l00089"></a>00089
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<a name="l00090"></a><a class="code" href="condvarlocal_8cpp.html#a0f358e9c4355138f629b8c4f37310295">00090</a> GLDEF_C TInt E32Main()
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<a name="l00091"></a>00091     {
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<a name="l00092"></a>00092         __UHEAP_MARK;
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<a name="l00093"></a>00093         CTrapCleanup* cleanup=CTrapCleanup::New();
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<a name="l00094"></a>00094         TRAPD(error,callExampleL());
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<a name="l00095"></a>00095         <span class="keyword">delete</span> cleanup;
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<a name="l00096"></a>00096         __ASSERT_ALWAYS(!error,User::Panic(KTxtEPOC32EX,error));
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<a name="l00097"></a>00097         __UHEAP_MARKEND;
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<a name="l00098"></a>00098         <span class="keywordflow">return</span> 0;
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<a name="l00099"></a>00099     }
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<a name="l00100"></a>00100
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<a name="l00101"></a>00101 LOCAL_C <span class="keywordtype">void</span> callExampleL()
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<a name="l00102"></a>00102     {
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<a name="l00103"></a>00103         console=Console::NewL(KTxtExampleCode,TSize(KConsFullScreen,KConsFullScreen));
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<a name="l00104"></a>00104         CleanupStack::PushL(console);
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<a name="l00105"></a>00105         TRAPD(error,DoExampleL());
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<a name="l00106"></a>00106         <span class="keywordflow">if</span> (error)
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<a name="l00107"></a>00107                 console-&gt;Printf(KFormatFailed, error);
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<a name="l00108"></a>00108         <span class="keywordflow">else</span>
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<a name="l00109"></a>00109                 console-&gt;Printf(KTxtOK);
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<a name="l00110"></a>00110         console-&gt;Printf(KTxtPressAnyKey);
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<a name="l00111"></a>00111         console-&gt;Getch();
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<a name="l00112"></a>00112         CleanupStack::PopAndDestroy();
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<a name="l00113"></a>00113     }
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</pre></div></div>
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<hr size="1"/><address style="text-align: right;"><small>Generated by&nbsp;
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
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</body>
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</html>
FCL/sftools/depl/docscontent