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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/threadclient_8cpp_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 13 Aug 2010 16:47:46 +0100
changeset 14 578be2adaf3e
parent 6 43e37759235e
permissions -rw-r--r--
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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/AdvancedClientServerExample/ThreadClient/src/threadclient.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/AdvancedClientServerExample/ThreadClient/src/threadclient.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2007-2009 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">//</span>
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<a name="l00015"></a>00015
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<a name="l00016"></a>00016 <span class="preprocessor">#include &quot;threadclient.h&quot;</span>
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<a name="l00017"></a>00017 <span class="preprocessor">#include &quot;threadserver.h&quot;</span>
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<a name="l00018"></a>00018 <span class="preprocessor">#include &quot;threadclientserver.h&quot;</span>
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<a name="l00019"></a>00019 <span class="preprocessor">#include&lt;e32debug.h&gt;</span>
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<a name="l00020"></a>00020
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<a name="l00021"></a>00021 <span class="preprocessor">#define KMaxServerNameLength 256</span>
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<a name="l00022"></a>00022 <span class="preprocessor"></span>
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<a name="l00023"></a>00023 <span class="keyword">static</span> <span class="keyword">const</span> TUid KUidThreadServer = {0x10283039}; <span class="comment">// Thread Server UID</span>
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<a name="l00024"></a>00024 <span class="keyword">const</span> TInt KCreateSessionRetryCount = 2;                        <span class="comment">//CreateSession retry count</span>
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<a name="l00025"></a>00025 <span class="keyword">const</span> TInt KServerDefaultMessageSlots = 2;                      <span class="comment">//default async message slots</span>
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<a name="l00026"></a>00026
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<a name="l00033"></a>00033 <span class="keyword">static</span> TInt StartServer()
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<a name="l00034"></a>00034         {
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<a name="l00035"></a>00035         <span class="keyword">const</span> TUidType serverUid(KNullUid,KNullUid,KUidThreadServer);
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<a name="l00036"></a>00036         TThreadFunction serverFunc = <a class="code" href="class_c_thread_server.html#acdab1f08c0f860dd83ccacbf26eeaced">CThreadServer::StartThread</a>;
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<a name="l00037"></a>00037         RThread server;
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<a name="l00038"></a>00038
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<a name="l00039"></a>00039         <span class="comment">//create a new thread</span>
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<a name="l00040"></a>00040         TInt r = server.Create(_L(<span class="stringliteral">&quot;&quot;</span>), serverFunc, KThreadServerStackSize,
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<a name="l00041"></a>00041         #ifdef SYMBIAN_USE_SEPARATE_HEAPS
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<a name="l00042"></a>00042                                 KThreadServerInitHeapSize, KThreadServerMaxHeapSize,
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<a name="l00043"></a>00043         #<span class="keywordflow">else</span>
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<a name="l00044"></a>00044                                                 &amp;User::Heap(), <span class="comment">//shared heap is now default</span>
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<a name="l00045"></a>00045         #endif
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<a name="l00046"></a>00046                                 NULL,EOwnerProcess);
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<a name="l00047"></a>00047
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<a name="l00048"></a>00048         <span class="keywordflow">if</span> (r!=KErrNone)
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<a name="l00049"></a>00049                 <span class="keywordflow">return</span> r;
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<a name="l00050"></a>00050         TRequestStatus stat;
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<a name="l00051"></a>00051         server.Rendezvous(stat);
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<a name="l00052"></a>00052
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<a name="l00053"></a>00053         <span class="keywordflow">if</span> (stat!=KRequestPending)
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<a name="l00054"></a>00054                 server.Kill(KErrCouldNotConnect);               <span class="comment">// abort startup</span>
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<a name="l00055"></a>00055         <span class="keywordflow">else</span>
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<a name="l00056"></a>00056                 server.Resume();        <span class="comment">// logon OK - start the server</span>
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<a name="l00057"></a>00057
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<a name="l00058"></a>00058         User::WaitForRequest(stat);             <span class="comment">// wait for start or death</span>
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<a name="l00059"></a>00059         <span class="comment">// The server exit type may be a panic value and a panic value can be zero, which is the same value as KErrNone. </span>
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<a name="l00060"></a>00060         <span class="comment">// So, the exit type is tested for a panic before being returned.</span>
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<a name="l00061"></a>00061         r=(server.ExitType()==EExitPanic) ? KErrServerTerminated : stat.Int();
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<a name="l00062"></a>00062         server.Close();
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<a name="l00063"></a>00063         <span class="keywordflow">return</span> r;
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<a name="l00064"></a>00064         }
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<a name="l00068"></a><a class="code" href="class_r_thread_client.html#afc30d492698d70ffcf1699ed30be41af">00068</a> EXPORT_C TInt <a class="code" href="class_r_thread_client.html#afc30d492698d70ffcf1699ed30be41af">RThreadClient::Connect</a>()
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<a name="l00069"></a>00069         {
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<a name="l00070"></a>00070         TInt retry=KCreateSessionRetryCount;
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<a name="l00071"></a>00071         FOREVER
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<a name="l00072"></a>00072                 {
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<a name="l00073"></a>00073                 <span class="comment">// try to create a session with the server which has KServerDefaultMessageSlots async message slots</span>
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<a name="l00074"></a>00074                 TInt r=CreateSession(KThreadServerName,
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<a name="l00075"></a>00075                                                          TVersion(KThreadServerVersion,
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<a name="l00076"></a>00076                                                                           KThreadServerMinorVersionNumber,
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<a name="l00077"></a>00077                                                                           KThreadServerBuildVersionNumber),
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<a name="l00078"></a>00078                                                          KServerDefaultMessageSlots);
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<a name="l00079"></a>00079                 <span class="keywordflow">if</span> (r!=KErrNotFound &amp;&amp; r!=KErrServerTerminated)
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<a name="l00080"></a>00080                         <span class="keywordflow">return</span> r;
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<a name="l00081"></a>00081                 <span class="keywordflow">if</span> (--retry==0)
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<a name="l00082"></a>00082                         <span class="keywordflow">return</span> r;
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<a name="l00083"></a>00083                 r=StartServer();
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<a name="l00084"></a>00084                 <span class="keywordflow">if</span> (r!=KErrNone &amp;&amp; r!=KErrAlreadyExists)
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<a name="l00085"></a>00085                         <span class="keywordflow">return</span> r;
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<a name="l00086"></a>00086                 <span class="comment">// 1. r=KErrNone means Server starts up successfully</span>
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<a name="l00087"></a>00087                 <span class="comment">// 2. r=KErrAlreadyExists means duplicate server was trying to start up </span>
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<a name="l00088"></a>00088                 <span class="comment">//              Note: if there are other functions called before CServer2::StartL() during construction,</span>
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<a name="l00089"></a>00089                 <span class="comment">//              other errors might happen when the duplicate server is trying to start</span>
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<a name="l00090"></a>00090                 <span class="comment">//              therefore, we recommend CServer2::StartL() is the first function in server construction</span>
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<a name="l00091"></a>00091                 <span class="comment">//              see CThreadServer::ConstructL()</span>
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<a name="l00092"></a>00092
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<a name="l00093"></a>00093                 <span class="comment">// NOTE: If users would like to retry start up server after other scenarios happened, e.g. panic,then go </span>
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<a name="l00094"></a>00094                 <span class="comment">//               through the following steps:</span>
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<a name="l00095"></a>00095                 <span class="comment">//                1. Increase the value of KCreateSessionRetryCount (only start up server once in this example)</span>
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<a name="l00096"></a>00096                 <span class="comment">//                2. Need another variable, e.g. TExitType, together with error code returned in StartServer()</span>
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<a name="l00097"></a>00097                 <span class="comment">//                      to distinguish these scenarios</span>
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<a name="l00098"></a>00098                 <span class="comment">//                3. modify the third if statement to stop exit when the required scenarios happens.</span>
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<a name="l00099"></a>00099                 <span class="comment">//           </span>
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<a name="l00100"></a>00100                 }
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<a name="l00101"></a>00101         }
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<a name="l00106"></a><a class="code" href="class_r_thread_client.html#a08a81078c1757ec543c957a2bdc926c0">00106</a> EXPORT_C TInt <a class="code" href="class_r_thread_client.html#a08a81078c1757ec543c957a2bdc926c0">RThreadClient::OpenDriver</a>()
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<a name="l00107"></a>00107         {
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<a name="l00108"></a>00108         <span class="keywordflow">return</span> SendReceive(EThreadServerOpenDriver);
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<a name="l00109"></a>00109         }
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<a name="l00115"></a><a class="code" href="class_r_thread_client.html#a236149601a88df1c7b80fd9259454528">00115</a> EXPORT_C <span class="keywordtype">void</span> <a class="code" href="class_r_thread_client.html#a236149601a88df1c7b80fd9259454528">RThreadClient::Send</a>(<span class="keyword">const</span> TDesC8&amp; aBuf, TRequestStatus&amp; aStatus)
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<a name="l00116"></a>00116         {
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<a name="l00117"></a>00117         SendReceive(EThreadServerSendData, TIpcArgs(&amp;aBuf), aStatus);
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<a name="l00118"></a>00118         }
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<a name="l00122"></a><a class="code" href="class_r_thread_client.html#a177b9da53bb469b741c9b5bb1243b7ec">00122</a> EXPORT_C <span class="keywordtype">void</span> <a class="code" href="class_r_thread_client.html#a177b9da53bb469b741c9b5bb1243b7ec">RThreadClient::SendCancel</a>()
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<a name="l00123"></a>00123         {
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<a name="l00124"></a>00124         SendReceive(EThreadServerSendDataCancel);
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<a name="l00125"></a>00125         }
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<a name="l00130"></a><a class="code" href="class_r_thread_client.html#a6d1378569255876c4a4e901328ad02b3">00130</a> EXPORT_C TInt <a class="code" href="class_r_thread_client.html#a6d1378569255876c4a4e901328ad02b3">RThreadClient::UnloadDeviceDriver</a>()
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<a name="l00131"></a>00131         {
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<a name="l00132"></a>00132         <span class="keywordflow">return</span> SendReceive(EThreadServerUnloadDeviceDriver);
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<a name="l00133"></a>00133         }
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<a name="l00138"></a><a class="code" href="class_r_thread_client.html#a52eb0c4b09e2f0a7b2f13e91902286b2">00138</a> EXPORT_C TInt <a class="code" href="class_r_thread_client.html#a52eb0c4b09e2f0a7b2f13e91902286b2">RThreadClient::LoadDeviceDriver</a>()
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<a name="l00139"></a>00139         {
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<a name="l00140"></a>00140         <span class="keywordflow">return</span> SendReceive(EThreadServerLoadDeviceDriver);
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<a name="l00141"></a>00141         }
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<a name="l00142"></a>00142
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<a name="l00143"></a>00143 <span class="comment">//EOF</span>
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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>
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