Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_smp_example_8cpp_source.html
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>TB9.2 Example Applications: examples/Base/SmpExample/src/SmpExample.cpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.6.2 -->
<h1>examples/Base/SmpExample/src/SmpExample.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
<a name="l00014"></a>00014 <span class="preprocessor">#include <d32dbms.h></span> <span class="comment">//Used for RDbDatabase class. </span>
<a name="l00015"></a>00015 <span class="preprocessor">#include "SmpExample.h"</span>
<a name="l00016"></a>00016 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KDatabase1, <span class="stringliteral">"C:\\DBforSMP1.db"</span>);
<a name="l00017"></a>00017 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KDatabase2, <span class="stringliteral">"C:\\DBforSMP2.db"</span>);
<a name="l00018"></a>00018
<a name="l00022"></a><a class="code" href="class_c_smp_example.html#a4f902855860346e1529c8aad989100f0">00022</a> <a class="code" href="class_c_smp_example.html#a4f902855860346e1529c8aad989100f0">CSmpExample::~CSmpExample</a>()
<a name="l00023"></a>00023 {
<a name="l00024"></a>00024 iReadThread.Close(); <span class="comment">//Reader thread closed. </span>
<a name="l00025"></a>00025 iWriteThread1.Close(); <span class="comment">//Writer thread closed. </span>
<a name="l00026"></a>00026 iWriteThread2.Close(); <span class="comment">//Writer thread closed.</span>
<a name="l00027"></a>00027 <span class="keyword">delete</span> iConsole;
<a name="l00028"></a>00028 }
<a name="l00029"></a>00029
<a name="l00033"></a><a class="code" href="class_c_smp_example.html#aaf2dab332a98167a1dde6309732a2460">00033</a> <a class="code" href="class_c_smp_example.html">CSmpExample</a>* <a class="code" href="class_c_smp_example.html#aaf2dab332a98167a1dde6309732a2460">CSmpExample::NewL</a>()
<a name="l00034"></a>00034 {
<a name="l00035"></a>00035 <a class="code" href="class_c_smp_example.html">CSmpExample</a>* <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave)<a class="code" href="class_c_smp_example.html">CSmpExample</a>();
<a name="l00036"></a>00036 CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00037"></a>00037 <span class="keyword">self</span>->ConstructL();
<a name="l00038"></a>00038 CleanupStack::Pop(<span class="keyword">self</span>);
<a name="l00039"></a>00039 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00040"></a>00040 }
<a name="l00041"></a>00041
<a name="l00045"></a><a class="code" href="class_c_smp_example.html#aa9bbdb0f3c1cb00236cf6eedc2fe0840">00045</a> <span class="keywordtype">void</span> <a class="code" href="class_c_smp_example.html#aa9bbdb0f3c1cb00236cf6eedc2fe0840">CSmpExample::ConstructL</a>()
<a name="l00046"></a>00046 {
<a name="l00047"></a>00047 <a class="code" href="class_c_smp_example.html#a6ed7d09453967159b3cb9cb8c271aeab">CreateDatabaseL</a>(KDatabase1);
<a name="l00048"></a>00048 <a class="code" href="class_c_smp_example.html#a6ed7d09453967159b3cb9cb8c271aeab">CreateDatabaseL</a>(KDatabase2);
<a name="l00049"></a>00049
<a name="l00050"></a>00050 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextConsoleTitle, <span class="stringliteral">"SmpExample"</span>);
<a name="l00051"></a>00051 iConsole = <a class="code" href="class_c_smp_example.html#aaf2dab332a98167a1dde6309732a2460">Console::NewL</a>(KTextConsoleTitle, TSize(KConsFullScreen, KConsFullScreen));
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <span class="comment">//Creates a reader thread to read the databases.</span>
<a name="l00054"></a>00054 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KReader, <span class="stringliteral">"ReaderThread"</span>);
<a name="l00055"></a>00055 User::LeaveIfError(iReadThread.Create(KReader, <a class="code" href="class_c_smp_example.html#ac56a561b32603f3d9fccb186b90ee28b">ReadThreadFuncL</a>, KDefaultStackSize, KMinHeapSize, 256*KMinHeapSize, <span class="keyword">this</span>, EOwnerProcess));
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="comment">//Creates a writer thread to write to the DBforSMP1.db database. </span>
<a name="l00058"></a>00058 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KWriter1, <span class="stringliteral">"WriterThread1"</span>);
<a name="l00059"></a>00059 User::LeaveIfError(iWriteThread1.Create(KWriter1, <a class="code" href="class_c_smp_example.html#a3a99e9be00e57c1d8489de6f62d00a2b">WriteThread1FuncL</a>, KDefaultStackSize, KMinHeapSize, 256*KMinHeapSize, <span class="keyword">this</span>, EOwnerProcess));
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="comment">//Creates a writer thread to write to the DBforSMP2.db database. </span>
<a name="l00062"></a>00062 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KWriter2, <span class="stringliteral">"WriterThread2"</span>);
<a name="l00063"></a>00063 User::LeaveIfError(iWriteThread2.Create(KWriter2, <a class="code" href="class_c_smp_example.html#a41ccf5be445f2ad57cee4fa93b8830c6">WriteThread2FuncL</a>, KDefaultStackSize, KMinHeapSize, 256*KMinHeapSize, <span class="keyword">this</span>, EOwnerProcess));
<a name="l00064"></a>00064
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="comment">//Sets priority to the threads. </span>
<a name="l00067"></a>00067 iWriteThread1.SetPriority(EPriorityMuchLess);
<a name="l00068"></a>00068 iWriteThread2.SetPriority(EPriorityMore);
<a name="l00069"></a>00069 iReadThread.SetPriority(EPriorityNormal);
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00075"></a><a class="code" href="class_c_smp_example.html#afdb87a66a6b0a41cbea465aa2495aa1c">00075</a> <span class="keywordtype">void</span> <a class="code" href="class_c_smp_example.html#afdb87a66a6b0a41cbea465aa2495aa1c">CSmpExample::StartThreads</a>()
<a name="l00076"></a>00076 {
<a name="l00077"></a>00077 TRequestStatus writerThread1Status;
<a name="l00078"></a>00078 TRequestStatus readerThreadStatus;
<a name="l00079"></a>00079 TRequestStatus writerThread2Status;
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextPressKey, <span class="stringliteral">"\nPress any key to start writing to and reading from the database\n"</span>);
<a name="l00082"></a>00082 iConsole->Printf(KTextPressKey);
<a name="l00083"></a>00083 iConsole->Getch();
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="comment">//Requests a notification for the ReaderThread to terminate. </span>
<a name="l00086"></a>00086 iReadThread.Logon(readerThreadStatus);
<a name="l00087"></a>00087 iReadThread.Resume();
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="comment">//Requests a notification for the WriterThread1 to terminate. </span>
<a name="l00090"></a>00090 iWriteThread1.Logon(writerThread1Status);
<a name="l00091"></a>00091 iWriteThread1.Resume();
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="comment">//Requests a notification for the WriterThread2 to terminate. </span>
<a name="l00094"></a>00094 iWriteThread2.Logon(writerThread2Status);
<a name="l00095"></a>00095 iWriteThread2.Resume();
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="comment">//Control returns to the main thread when the all the threads terminate. </span>
<a name="l00098"></a>00098 User::WaitForRequest(writerThread1Status);
<a name="l00099"></a>00099 User::WaitForRequest(readerThreadStatus);
<a name="l00100"></a>00100 User::WaitForRequest(writerThread2Status);
<a name="l00101"></a>00101 }
<a name="l00102"></a>00102
<a name="l00106"></a><a class="code" href="class_c_smp_example.html#a8eaf4cbbf9c4b69d0854140963a22e51">00106</a> <span class="keywordtype">void</span> <a class="code" href="class_c_smp_example.html#a8eaf4cbbf9c4b69d0854140963a22e51">CSmpExample::PrintMessage</a>()
<a name="l00107"></a>00107 {
<a name="l00108"></a>00108 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextWelcome, <span class="stringliteral">"Welcome to the SmpExample.\n"</span>);
<a name="l00109"></a>00109 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextPurposel1, <span class="stringliteral">"There are three threads running in the example: WriterThread1 has the lowest priority,\n"</span>);
<a name="l00110"></a>00110 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextPurposel2, <span class="stringliteral">"ReaderThread has normal priority and WriterThread2 has maximum priority.\n"</span>);
<a name="l00111"></a>00111 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextPurposel3, <span class="stringliteral">"The two WriterThreads open two different databases and write some integers to them.\n"</span>);
<a name="l00112"></a>00112 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextPurposel4, <span class="stringliteral">"ReaderThread reads the two databases and prints the output to the console.\n"</span>);
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextPurposel5, <span class="stringliteral">"In a unicore environment, WriterThread1 will be scheduled to run last and would not have\n"</span>);
<a name="l00115"></a>00115 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextPurposel6, <span class="stringliteral">"written to the database when ReaderThread starts reading the databases.\n"</span>);
<a name="l00116"></a>00116 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextPurposel7, <span class="stringliteral">"But in an SMP environment, both the WriterThreads write to their respective databases simultaneously.\n"</span>);
<a name="l00117"></a>00117
<a name="l00118"></a>00118 iConsole->Printf(KTextWelcome);
<a name="l00119"></a>00119 iConsole->Printf(KTextPurposel1);
<a name="l00120"></a>00120 iConsole->Printf(KTextPurposel2);
<a name="l00121"></a>00121 iConsole->Printf(KTextPurposel3);
<a name="l00122"></a>00122 iConsole->Printf(KTextPurposel4);
<a name="l00123"></a>00123 iConsole->Printf(KTextPurposel5);
<a name="l00124"></a>00124 iConsole->Printf(KTextPurposel6);
<a name="l00125"></a>00125 iConsole->Printf(KTextPurposel7);
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127
<a name="l00131"></a><a class="code" href="class_c_smp_example.html#a3b589411b99d71c460442290516e04ec">00131</a> <span class="keywordtype">void</span> <a class="code" href="class_c_smp_example.html#a3b589411b99d71c460442290516e04ec">CSmpExample::ReadDatabaseL</a>(<span class="keyword">const</span> TDesC& aDbName, CConsoleBase& console)
<a name="l00132"></a>00132 {
<a name="l00133"></a>00133 <span class="comment">//Creates a file server session object before any file system manipulation. </span>
<a name="l00134"></a>00134 RFs fsSession;
<a name="l00135"></a>00135 CleanupClosePushL(fsSession);
<a name="l00136"></a>00136 fsSession.Connect();
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="comment">//Creates Rdbs object</span>
<a name="l00139"></a>00139 RDbs dbs;
<a name="l00140"></a>00140 CleanupClosePushL(dbs);
<a name="l00141"></a>00141 dbs.Connect();
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <span class="comment">//Opens the named database using the RDbs object</span>
<a name="l00144"></a>00144 RDbNamedDatabase database;
<a name="l00145"></a>00145 CleanupClosePushL(database);
<a name="l00146"></a>00146 User::LeaveIfError(database.Open(dbs, aDbName));
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="comment">//Locks the database.</span>
<a name="l00149"></a>00149 database.Begin();
<a name="l00150"></a>00150 <span class="comment">//Prepare an SQL query to read one row of numbers from the database. </span>
<a name="l00151"></a>00151 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KSQLStatement, <span class="stringliteral">"Select Number1, Number2, Number3 from Numbers order by Number1, Number2, Number3"</span>);
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <span class="comment">//Creates a view on the database to read it.</span>
<a name="l00154"></a>00154 RDbView view;
<a name="l00155"></a>00155 CleanupClosePushL(view);
<a name="l00156"></a>00156
<a name="l00157"></a>00157 User::LeaveIfError(view.Prepare(database, TDbQuery(KSQLStatement, EDbCompareNormal)));
<a name="l00158"></a>00158 User::LeaveIfError(view.EvaluateAll());
<a name="l00159"></a>00159
<a name="l00160"></a>00160 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextReading, <span class="stringliteral">"Reading the database\t %S.\n"</span>);
<a name="l00161"></a>00161 console.Printf(KTextReading, &aDbName);
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="comment">//Boolean variable to check whether the database is empty.</span>
<a name="l00164"></a>00164 TBool isDbEmpty= EFalse;
<a name="l00165"></a>00165 <span class="comment">//Iterates through the database till the last row is read. </span>
<a name="l00166"></a>00166 <span class="keywordflow">for</span> (view.FirstL(); view.AtRow(); view.NextL())
<a name="l00167"></a>00167 {
<a name="l00168"></a>00168 view.GetL();
<a name="l00169"></a>00169 TInt number1 = view.ColInt(1);
<a name="l00170"></a>00170 TInt number2 = view.ColInt(2);
<a name="l00171"></a>00171 TInt number3 = view.ColInt(3);
<a name="l00172"></a>00172 <span class="comment">//Prepare a row formatter to print numbers in the console. </span>
<a name="l00173"></a>00173 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KRowFormatter, <span class="stringliteral">"Reading %d \t%d\t%d\n"</span>);
<a name="l00174"></a>00174 <span class="comment">//Reads the integers from the view and display them in the console.</span>
<a name="l00175"></a>00175 console.Printf(KRowFormatter, number1, number2, number3);
<a name="l00176"></a>00176 isDbEmpty= ETrue;
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178
<a name="l00179"></a>00179 <span class="keywordflow">if</span>(isDbEmpty== EFalse)
<a name="l00180"></a>00180 {
<a name="l00181"></a>00181 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextDbEmpty, <span class="stringliteral">"Database is empty.\n\n"</span>);
<a name="l00182"></a>00182 console.Printf(KTextDbEmpty);
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184 <span class="keywordflow">else</span>
<a name="l00185"></a>00185 {
<a name="l00186"></a>00186 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextAllRead, <span class="stringliteral">"All the numbers in the database have been read.\n\n"</span>);
<a name="l00187"></a>00187 console.Printf(KTextAllRead);
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189
<a name="l00190"></a>00190 CleanupStack::PopAndDestroy(&view);
<a name="l00191"></a>00191 CleanupStack::PopAndDestroy(&database);
<a name="l00192"></a>00192 CleanupStack::PopAndDestroy(&dbs);
<a name="l00193"></a>00193 CleanupStack::PopAndDestroy(&fsSession);
<a name="l00194"></a>00194 }
<a name="l00195"></a>00195
<a name="l00199"></a><a class="code" href="class_c_smp_example.html#a70e2ac4866c0bea841d38203ae2f6194">00199</a> <span class="keywordtype">void</span> <a class="code" href="class_c_smp_example.html#a70e2ac4866c0bea841d38203ae2f6194">CSmpExample::ReadBothDatabasesL</a>()
<a name="l00200"></a>00200 {
<a name="l00201"></a>00201 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextConsoleTitle, <span class="stringliteral">"ReaderThread"</span>);
<a name="l00202"></a>00202 CConsoleBase* console= <a class="code" href="class_c_smp_example.html#aaf2dab332a98167a1dde6309732a2460">Console::NewL</a>(KTextConsoleTitle, TSize(KConsFullScreen, KConsFullScreen));
<a name="l00203"></a>00203 CleanupStack::PushL(console);
<a name="l00204"></a>00204
<a name="l00205"></a>00205 <span class="comment">//Reads DBforSMP1.db and prints the output to the console. </span>
<a name="l00206"></a>00206 <a class="code" href="class_c_smp_example.html#a3b589411b99d71c460442290516e04ec">ReadDatabaseL</a>(KDatabase1, *console);
<a name="l00207"></a>00207 <span class="comment">//Reads DBforSMP2.db and prints the output to the console.</span>
<a name="l00208"></a>00208 <a class="code" href="class_c_smp_example.html#a3b589411b99d71c460442290516e04ec">ReadDatabaseL</a>(KDatabase2, *console);
<a name="l00209"></a>00209
<a name="l00210"></a>00210 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KExit, <span class="stringliteral">"Press any key to exit\n"</span>);
<a name="l00211"></a>00211 console->Printf(KExit);
<a name="l00212"></a>00212 console->Getch();
<a name="l00213"></a>00213 CleanupStack::PopAndDestroy(console);
<a name="l00214"></a>00214 }
<a name="l00215"></a>00215
<a name="l00220"></a><a class="code" href="class_c_smp_example.html#ac56a561b32603f3d9fccb186b90ee28b">00220</a> TInt <a class="code" href="class_c_smp_example.html#ac56a561b32603f3d9fccb186b90ee28b">CSmpExample::ReadThreadFuncL</a>(TAny* <span class="comment">/*aPtr*/</span>)
<a name="l00221"></a>00221 {
<a name="l00222"></a>00222 __UHEAP_MARK;
<a name="l00223"></a>00223 <span class="comment">//Creates cleanup stack.</span>
<a name="l00224"></a>00224 CTrapCleanup* cleanup = CTrapCleanup::New();
<a name="l00225"></a>00225 <span class="keywordflow">if</span>(!cleanup)
<a name="l00226"></a>00226 {
<a name="l00227"></a>00227 <span class="keywordflow">return</span> KErrNoMemory;
<a name="l00228"></a>00228 }
<a name="l00229"></a>00229
<a name="l00230"></a>00230 TRAPD(error, <a class="code" href="class_c_smp_example.html#a70e2ac4866c0bea841d38203ae2f6194">ReadBothDatabasesL</a>());
<a name="l00231"></a>00231 <span class="keywordflow">if</span>(error != KErrNone)
<a name="l00232"></a>00232 {
<a name="l00233"></a>00233 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KUserPanic, <span class="stringliteral">"DB Read Failed"</span>);
<a name="l00234"></a>00234 User::Panic(KUserPanic, error);
<a name="l00235"></a>00235 }
<a name="l00236"></a>00236 <span class="keyword">delete</span> cleanup;
<a name="l00237"></a>00237 __UHEAP_MARKEND;
<a name="l00238"></a>00238 <span class="keywordflow">return</span> KErrNone;
<a name="l00239"></a>00239 }
<a name="l00240"></a>00240
<a name="l00245"></a><a class="code" href="class_c_smp_example.html#a26abdb02599626bb596e73e90a145037">00245</a> <span class="keywordtype">void</span> <a class="code" href="class_c_smp_example.html#a26abdb02599626bb596e73e90a145037">CSmpExample::WriteDbFuncL</a>(<span class="keyword">const</span> TDesC& aDbName, TInt aNum)
<a name="l00246"></a>00246 {
<a name="l00247"></a>00247 <span class="comment">//Creates a file server session object before any file system manipulation. </span>
<a name="l00248"></a>00248 RFs fsSession;
<a name="l00249"></a>00249 CleanupClosePushL(fsSession);
<a name="l00250"></a>00250 fsSession.Connect();
<a name="l00251"></a>00251
<a name="l00252"></a>00252
<a name="l00253"></a>00253 <span class="comment">//Creates Rdbs object </span>
<a name="l00254"></a>00254 RDbs dbs;
<a name="l00255"></a>00255 CleanupClosePushL(dbs);
<a name="l00256"></a>00256 dbs.Connect();
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <span class="comment">//Opens the database using the RDbs object</span>
<a name="l00259"></a>00259 RDbNamedDatabase database;
<a name="l00260"></a>00260 CleanupClosePushL(database);
<a name="l00261"></a>00261 User::LeaveIfError(database.Open(dbs, aDbName));
<a name="l00262"></a>00262
<a name="l00263"></a>00263 <span class="comment">//Locks the database.</span>
<a name="l00264"></a>00264 database.Begin();
<a name="l00265"></a>00265
<a name="l00266"></a>00266 <span class="comment">//Creates a view on the database. </span>
<a name="l00267"></a>00267 RDbView view;
<a name="l00268"></a>00268 CleanupClosePushL(view);
<a name="l00269"></a>00269 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KSQLStatement, <span class="stringliteral">"Select Number1, Number2, Number3 from Numbers order by Number1, Number2, Number3"</span>);
<a name="l00270"></a>00270 User::LeaveIfError(view.Prepare(database, TDbQuery(KSQLStatement, EDbCompareNormal)));
<a name="l00271"></a>00271 User::LeaveIfError(view.EvaluateAll());
<a name="l00272"></a>00272
<a name="l00273"></a>00273 <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i<5; i++)
<a name="l00274"></a>00274 {
<a name="l00275"></a>00275 <span class="comment">//Inserts a new row at the end of the database. </span>
<a name="l00276"></a>00276 view.InsertL();
<a name="l00277"></a>00277 <span class="comment">//Fills three columns with numbers.</span>
<a name="l00278"></a>00278 view.SetColL(1, aNum++);
<a name="l00279"></a>00279 view.SetColL(2, aNum++);
<a name="l00280"></a>00280 view.SetColL(3, aNum++);
<a name="l00281"></a>00281 view.PutL();
<a name="l00282"></a>00282 }
<a name="l00283"></a>00283
<a name="l00284"></a>00284 CleanupStack::PopAndDestroy(&view);
<a name="l00285"></a>00285 <span class="comment">//Commits the database and unlocks it. </span>
<a name="l00286"></a>00286 database.Commit();
<a name="l00287"></a>00287 CleanupStack::PopAndDestroy(&database);
<a name="l00288"></a>00288 CleanupStack::PopAndDestroy(&dbs);
<a name="l00289"></a>00289 CleanupStack::PopAndDestroy(&fsSession);
<a name="l00290"></a>00290 }
<a name="l00291"></a>00291
<a name="l00292"></a>00292
<a name="l00297"></a><a class="code" href="class_c_smp_example.html#a41ccf5be445f2ad57cee4fa93b8830c6">00297</a> TInt <a class="code" href="class_c_smp_example.html#a41ccf5be445f2ad57cee4fa93b8830c6">CSmpExample::WriteThread2FuncL</a>(TAny* <span class="comment">/*aPtr*/</span>)
<a name="l00298"></a>00298 {
<a name="l00299"></a>00299 __UHEAP_MARK;
<a name="l00300"></a>00300 <span class="comment">//Creates cleanup stack.</span>
<a name="l00301"></a>00301 CTrapCleanup* cleanup = CTrapCleanup::New();
<a name="l00302"></a>00302 <span class="keywordflow">if</span>(!cleanup)
<a name="l00303"></a>00303 {
<a name="l00304"></a>00304 <span class="keywordflow">return</span> KErrNoMemory;
<a name="l00305"></a>00305 }
<a name="l00306"></a>00306
<a name="l00307"></a>00307 <span class="comment">//First number to be written to the database. </span>
<a name="l00308"></a>00308 <span class="keyword">const</span> <span class="keywordtype">int</span> KFirstNumforDb2 = 500;
<a name="l00309"></a>00309 TRAPD(err, <a class="code" href="class_c_smp_example.html#a26abdb02599626bb596e73e90a145037">WriteDbFuncL</a>(KDatabase2, KFirstNumforDb2));
<a name="l00310"></a>00310 <span class="keywordflow">if</span>(err != KErrNone)
<a name="l00311"></a>00311 {
<a name="l00312"></a>00312 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KUserPanic, <span class="stringliteral">"DB Write Failed"</span>);
<a name="l00313"></a>00313 User::Panic(KUserPanic, err);
<a name="l00314"></a>00314 }
<a name="l00315"></a>00315 <span class="keyword">delete</span> cleanup;
<a name="l00316"></a>00316 __UHEAP_MARKEND;
<a name="l00317"></a>00317 <span class="keywordflow">return</span> KErrNone;
<a name="l00318"></a>00318 }
<a name="l00319"></a>00319
<a name="l00324"></a><a class="code" href="class_c_smp_example.html#a3a99e9be00e57c1d8489de6f62d00a2b">00324</a> TInt <a class="code" href="class_c_smp_example.html#a3a99e9be00e57c1d8489de6f62d00a2b">CSmpExample::WriteThread1FuncL</a>(TAny* <span class="comment">/*aPtr*/</span>)
<a name="l00325"></a>00325 {
<a name="l00326"></a>00326 __UHEAP_MARK;
<a name="l00327"></a>00327 <span class="comment">//Creates cleanup stack.</span>
<a name="l00328"></a>00328 CTrapCleanup* cleanup = CTrapCleanup::New();
<a name="l00329"></a>00329 <span class="keywordflow">if</span>(!cleanup)
<a name="l00330"></a>00330 {
<a name="l00331"></a>00331 <span class="keywordflow">return</span> KErrNoMemory;
<a name="l00332"></a>00332 }
<a name="l00333"></a>00333
<a name="l00334"></a>00334 <span class="comment">//First number to be written to the database. </span>
<a name="l00335"></a>00335 <span class="keyword">const</span> <span class="keywordtype">int</span> KFirstNumforDb1 = 0;
<a name="l00336"></a>00336 TRAPD(err, <a class="code" href="class_c_smp_example.html#a26abdb02599626bb596e73e90a145037">WriteDbFuncL</a>(KDatabase1, KFirstNumforDb1));
<a name="l00337"></a>00337 <span class="keywordflow">if</span>(err != KErrNone)
<a name="l00338"></a>00338 {
<a name="l00339"></a>00339 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KUserPanic, <span class="stringliteral">"DB Write Failed"</span>);
<a name="l00340"></a>00340 User::Panic(KUserPanic, err);
<a name="l00341"></a>00341 }
<a name="l00342"></a>00342 <span class="keyword">delete</span> cleanup;
<a name="l00343"></a>00343 __UHEAP_MARKEND;
<a name="l00344"></a>00344 <span class="keywordflow">return</span> KErrNone;
<a name="l00345"></a>00345 }
<a name="l00346"></a>00346
<a name="l00351"></a><a class="code" href="class_c_smp_example.html#a6ed7d09453967159b3cb9cb8c271aeab">00351</a> <span class="keywordtype">void</span> <a class="code" href="class_c_smp_example.html#a6ed7d09453967159b3cb9cb8c271aeab">CSmpExample::CreateDatabaseL</a>(<span class="keyword">const</span> TDesC& aDbName)
<a name="l00352"></a>00352 {
<a name="l00353"></a>00353 <span class="comment">//Creates a file server session object before any file system manipulation. </span>
<a name="l00354"></a>00354 RFs fsSession;
<a name="l00355"></a>00355 CleanupClosePushL(fsSession);
<a name="l00356"></a>00356 fsSession.Connect();
<a name="l00357"></a>00357
<a name="l00358"></a>00358 <span class="comment">//Creates Rdbs object</span>
<a name="l00359"></a>00359 RDbs dbs;
<a name="l00360"></a>00360 CleanupClosePushL(dbs);
<a name="l00361"></a>00361 dbs.Connect();
<a name="l00362"></a>00362
<a name="l00363"></a>00363 <span class="comment">//Creates a new database with the name specified in the parameter aDbName, </span>
<a name="l00364"></a>00364 <span class="comment">//if database with same name is present, it will be replaced. </span>
<a name="l00365"></a>00365 RDbNamedDatabase database;
<a name="l00366"></a>00366 CleanupClosePushL(database);
<a name="l00367"></a>00367 User::LeaveIfError(database.Replace(fsSession, aDbName));
<a name="l00368"></a>00368 database.Close();
<a name="l00369"></a>00369
<a name="l00370"></a>00370 <span class="comment">//Opens the database using the RDbs object</span>
<a name="l00371"></a>00371 User::LeaveIfError(database.Open(dbs, aDbName));
<a name="l00372"></a>00372 <span class="comment">//Creates a table definition.</span>
<a name="l00373"></a>00373 CDbColSet* columns=CDbColSet::NewLC();
<a name="l00374"></a>00374
<a name="l00375"></a>00375 <span class="comment">//Adds three columns each containing Int32 values. </span>
<a name="l00376"></a>00376 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KCol1, <span class="stringliteral">"Number1"</span>);
<a name="l00377"></a>00377 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KCol2, <span class="stringliteral">"Number2"</span>);
<a name="l00378"></a>00378 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KCol3, <span class="stringliteral">"Number3"</span>);
<a name="l00379"></a>00379 columns->AddL(TDbCol(KCol1, EDbColInt32));
<a name="l00380"></a>00380 columns->AddL(TDbCol(KCol2, EDbColInt32));
<a name="l00381"></a>00381 columns->AddL(TDbCol(KCol3, EDbColInt32));
<a name="l00382"></a>00382
<a name="l00383"></a>00383
<a name="l00384"></a>00384 <span class="comment">//Creates the table, table name is "Numbers" and add the columns to it.</span>
<a name="l00385"></a>00385 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTable, <span class="stringliteral">"Numbers"</span>);
<a name="l00386"></a>00386 User::LeaveIfError(database.CreateTable(KTable, *columns));
<a name="l00387"></a>00387
<a name="l00388"></a>00388 CDbKey* key=CDbKey::NewLC();
<a name="l00389"></a>00389
<a name="l00390"></a>00390 <span class="comment">//Add the key columns.</span>
<a name="l00391"></a>00391 TDbKeyCol number1(KCol1);
<a name="l00392"></a>00392 key->AddL(number1);
<a name="l00393"></a>00393 TDbKeyCol number2(KCol2);
<a name="l00394"></a>00394 key->AddL(number2);
<a name="l00395"></a>00395 TDbKeyCol number3(KCol3);
<a name="l00396"></a>00396 key->AddL(number3);
<a name="l00397"></a>00397 User::LeaveIfError(database.CreateIndex(KTable, KTable, *key));
<a name="l00398"></a>00398
<a name="l00399"></a>00399 <span class="comment">//Cleans up the column set. </span>
<a name="l00400"></a>00400 CleanupStack::PopAndDestroy(key);
<a name="l00401"></a>00401 CleanupStack::PopAndDestroy(columns);
<a name="l00402"></a>00402 CleanupStack::PopAndDestroy(&database);
<a name="l00403"></a>00403 CleanupStack::PopAndDestroy(&dbs);
<a name="l00404"></a>00404 CleanupStack::PopAndDestroy(&fsSession);
<a name="l00405"></a>00405 }
<a name="l00406"></a>00406
<a name="l00411"></a>00411 <span class="keyword">static</span> <span class="keywordtype">void</span> MainL()
<a name="l00412"></a>00412 {
<a name="l00413"></a>00413 <a class="code" href="class_c_smp_example.html">CSmpExample</a>* smpExample = <a class="code" href="class_c_smp_example.html#aaf2dab332a98167a1dde6309732a2460">CSmpExample::NewL</a>();
<a name="l00414"></a>00414 CleanupStack::PushL(smpExample);
<a name="l00415"></a>00415 smpExample-><a class="code" href="class_c_smp_example.html#a8eaf4cbbf9c4b69d0854140963a22e51">PrintMessage</a>();
<a name="l00416"></a>00416 smpExample-><a class="code" href="class_c_smp_example.html#afdb87a66a6b0a41cbea465aa2495aa1c">StartThreads</a>();
<a name="l00417"></a>00417 CleanupStack::PopAndDestroy(smpExample);
<a name="l00418"></a>00418 }
<a name="l00419"></a>00419
<a name="l00423"></a>00423 <span class="keyword">extern</span> TInt E32Main()
<a name="l00424"></a>00424 {
<a name="l00425"></a>00425 <span class="comment">//Creates cleanup stack.</span>
<a name="l00426"></a>00426 __UHEAP_MARK;
<a name="l00427"></a>00427 CTrapCleanup* cleanup = CTrapCleanup::New();
<a name="l00428"></a>00428 <span class="keywordflow">if</span>(!cleanup)
<a name="l00429"></a>00429 {
<a name="l00430"></a>00430 <span class="keywordflow">return</span> KErrNoMemory;
<a name="l00431"></a>00431 }
<a name="l00432"></a>00432 <span class="comment">//Run application code inside a TRAP harness.</span>
<a name="l00433"></a>00433 TRAPD(mainError, MainL());
<a name="l00434"></a>00434 <span class="keywordflow">if</span>(mainError != KErrNone)
<a name="l00435"></a>00435 {
<a name="l00436"></a>00436 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KUserPanic, <span class="stringliteral">"Main Failed"</span>);
<a name="l00437"></a>00437 User::Panic(KUserPanic, mainError);
<a name="l00438"></a>00438 }
<a name="l00439"></a>00439 <span class="keyword">delete</span> cleanup;
<a name="l00440"></a>00440 __UHEAP_MARKEND;
<a name="l00441"></a>00441 <span class="keywordflow">return</span> KErrNone;
<a name="l00442"></a>00442 }
<a name="l00443"></a>00443
</pre></div></div>
<hr size="1"/><address style="text-align: right;"><small>Generated by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
</body>
</html>