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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_base_2_i_p_c_2_client_server_2_gettingstarted_2transient_2src_2server_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/ClientServer/Gettingstarted/transient/src/server.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/ClientServer/Gettingstarted/transient/src/server.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).</span>
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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">// Transient server example - server implementation</span>
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<a name="l00015"></a>00015 <span class="comment">//</span>
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<a name="l00016"></a>00016
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<a name="l00017"></a>00017 <span class="preprocessor">#include &quot;server.h&quot;</span>
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<a name="l00018"></a>00018
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<a name="l00019"></a>00019 <span class="keyword">inline</span> CShutdown::CShutdown()
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<a name="l00020"></a>00020         :CTimer(-1)
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<a name="l00021"></a>00021         {CActiveScheduler::Add(<span class="keyword">this</span>);}
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<a name="l00022"></a>00022 <span class="keyword">inline</span> <span class="keywordtype">void</span> CShutdown::ConstructL()
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<a name="l00023"></a>00023         {CTimer::ConstructL();}
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<a name="l00024"></a>00024 <span class="keyword">inline</span> <span class="keywordtype">void</span> CShutdown::Start()
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<a name="l00025"></a>00025         {After(KMyShutdownDelay);}
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<a name="l00026"></a>00026
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<a name="l00027"></a>00027 <span class="keyword">inline</span> CMyServer::CMyServer()
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<a name="l00028"></a>00028         :CServer2(0,ESharableSessions)
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<a name="l00029"></a>00029         {}
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<a name="l00030"></a>00030
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<a name="l00031"></a>00031 <span class="keyword">inline</span> CMySession::CMySession()
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<a name="l00032"></a>00032         {}
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<a name="l00033"></a>00033 <span class="keyword">inline</span> <a class="code" href="class_c_my_server.html">CMyServer</a>&amp; CMySession::Server()
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<a name="l00034"></a>00034         {<span class="keywordflow">return</span> *<span class="keyword">static_cast&lt;</span><a class="code" href="class_c_my_server.html">CMyServer</a>*<span class="keyword">&gt;</span>(<span class="keyword">const_cast&lt;</span>CServer2*<span class="keyword">&gt;</span>(CSession2::Server()));}
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<a name="l00035"></a>00035 <span class="keyword">inline</span> TBool CMySession::ReceivePending()<span class="keyword"> const</span>
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<a name="l00036"></a>00036 <span class="keyword">        </span>{<span class="keywordflow">return</span> !iReceiveMsg.IsNull();}
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<a name="l00037"></a>00037
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<a name="l00038"></a>00038
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<a name="l00040"></a>00040
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<a name="l00041"></a>00041 <span class="keywordtype">void</span> CMySession::CreateL()
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<a name="l00042"></a>00042 <span class="comment">//</span>
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<a name="l00043"></a>00043 <span class="comment">// 2nd phase construct for sessions - called by the CServer framework</span>
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<a name="l00044"></a>00044 <span class="comment">//</span>
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<a name="l00045"></a>00045         {
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<a name="l00046"></a>00046         Server().AddSession();
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<a name="l00047"></a>00047         }
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<a name="l00048"></a>00048
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<a name="l00049"></a>00049 CMySession::~CMySession()
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<a name="l00050"></a>00050         {
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<a name="l00051"></a>00051         Server().DropSession();
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<a name="l00052"></a>00052         }
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<a name="l00053"></a>00053
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<a name="l00054"></a>00054 <span class="keywordtype">void</span> CMySession::Send(<span class="keyword">const</span> TDesC&amp; aMessage)
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<a name="l00055"></a>00055 <span class="comment">//</span>
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<a name="l00056"></a>00056 <span class="comment">// Deliver the message to the client, truncating if required</span>
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<a name="l00057"></a>00057 <span class="comment">// If the write fails, panic the client, not the sender</span>
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<a name="l00058"></a>00058 <span class="comment">//</span>
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<a name="l00059"></a>00059         {
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<a name="l00060"></a>00060         <span class="keywordflow">if</span> (ReceivePending())
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<a name="l00061"></a>00061                 {
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<a name="l00062"></a>00062                 TPtrC m(aMessage);
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<a name="l00063"></a>00063                 <span class="keywordflow">if</span> (iReceiveLen&lt;aMessage.Length())
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<a name="l00064"></a>00064                         m.Set(m.Left(iReceiveLen));
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<a name="l00065"></a>00065                 TInt r=iReceiveMsg.Write(0,m);
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<a name="l00066"></a>00066                 <span class="keywordflow">if</span> (r==KErrNone)
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<a name="l00067"></a>00067                         iReceiveMsg.Complete(KErrNone);
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<a name="l00068"></a>00068                 <span class="keywordflow">else</span>
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<a name="l00069"></a>00069                         PanicClient(iReceiveMsg,EPanicBadDescriptor);
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<a name="l00070"></a>00070                 }
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<a name="l00071"></a>00071         }
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<a name="l00072"></a>00072
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<a name="l00073"></a>00073 <span class="keywordtype">void</span> CMySession::ServiceL(<span class="keyword">const</span> RMessage2&amp; aMessage)
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<a name="l00074"></a>00074 <span class="comment">//</span>
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<a name="l00075"></a>00075 <span class="comment">// Handle a client request.</span>
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<a name="l00076"></a>00076 <span class="comment">// Leaving is handled by CMyServer::ServiceError() which reports</span>
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<a name="l00077"></a>00077 <span class="comment">// the error code to the client</span>
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<a name="l00078"></a>00078 <span class="comment">//</span>
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<a name="l00079"></a>00079         {
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<a name="l00080"></a>00080         <span class="keywordflow">switch</span> (aMessage.Function())
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<a name="l00081"></a>00081                 {
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<a name="l00082"></a>00082         <span class="keywordflow">case</span> ESend:
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<a name="l00083"></a>00083                 {
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<a name="l00084"></a>00084                 TBuf&lt;KMaxMyMessage&gt; message;
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<a name="l00085"></a>00085                 aMessage.ReadL(0,message);
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<a name="l00086"></a>00086                 Server().Send(message);
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<a name="l00087"></a>00087                 aMessage.Complete(KErrNone);
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<a name="l00088"></a>00088                 <span class="keywordflow">break</span>;
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<a name="l00089"></a>00089                 }
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<a name="l00090"></a>00090         <span class="keywordflow">case</span> EReceive:
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<a name="l00091"></a>00091                 <span class="keywordflow">if</span> (ReceivePending())
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<a name="l00092"></a>00092                         PanicClient(aMessage,EPanicAlreadyReceiving);
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<a name="l00093"></a>00093                 <span class="keywordflow">else</span>
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<a name="l00094"></a>00094                         {
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<a name="l00095"></a>00095                         iReceiveMsg=aMessage;
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   105
 
<a name="l00096"></a>00096                         iReceiveLen=aMessage.Int1();
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   106
 
<a name="l00097"></a>00097                         }
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<a name="l00098"></a>00098                 <span class="keywordflow">break</span>;
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<a name="l00099"></a>00099         <span class="keywordflow">case</span> ECancelReceive:
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<a name="l00100"></a>00100                 <span class="keywordflow">if</span> (ReceivePending())
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   110
 
<a name="l00101"></a>00101                         iReceiveMsg.Complete(KErrCancel);
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   111
 
<a name="l00102"></a>00102                 aMessage.Complete(KErrNone);
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   112
 
<a name="l00103"></a>00103                 <span class="keywordflow">break</span>;
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   113
 
<a name="l00104"></a>00104         <span class="keywordflow">default</span>:
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   114
 
<a name="l00105"></a>00105                 PanicClient(aMessage,EPanicIllegalFunction);
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   115
 
<a name="l00106"></a>00106                 <span class="keywordflow">break</span>;
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<a name="l00107"></a>00107                 }
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<a name="l00108"></a>00108         }
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   118
 
<a name="l00109"></a>00109
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   119
 
<a name="l00110"></a>00110 <span class="keywordtype">void</span> CMySession::ServiceError(<span class="keyword">const</span> RMessage2&amp; aMessage,TInt aError)
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   120
 
<a name="l00111"></a>00111 <span class="comment">//</span>
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   121
 
<a name="l00112"></a>00112 <span class="comment">// Handle an error from CMySession::ServiceL()</span>
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   122
 
<a name="l00113"></a>00113 <span class="comment">// A bad descriptor error implies a badly programmed client, so panic it;</span>
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   123
 
<a name="l00114"></a>00114 <span class="comment">// otherwise use the default handling (report the error to the client)</span>
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   124
 
<a name="l00115"></a>00115 <span class="comment">//</span>
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   125
 
<a name="l00116"></a>00116         {
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   126
 
<a name="l00117"></a>00117         <span class="keywordflow">if</span> (aError==KErrBadDescriptor)
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<a name="l00118"></a>00118                 PanicClient(aMessage,EPanicBadDescriptor);
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<a name="l00119"></a>00119         CSession2::ServiceError(aMessage,aError);
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   129
 
<a name="l00120"></a>00120         }
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   130
 
<a name="l00121"></a>00121
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   131
 
<a name="l00122"></a>00122 <span class="keywordtype">void</span> CShutdown::RunL()
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   132
 
<a name="l00123"></a>00123 <span class="comment">//</span>
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   133
 
<a name="l00124"></a>00124 <span class="comment">// Initiate server exit when the timer expires</span>
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   134
 
<a name="l00125"></a>00125 <span class="comment">//</span>
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   135
 
<a name="l00126"></a>00126         {
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   136
 
<a name="l00127"></a>00127         CActiveScheduler::Stop();
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<a name="l00128"></a>00128         }
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   138
 
<a name="l00129"></a>00129
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   139
 
<a name="l00130"></a>00130 CServer2* CMyServer::NewLC()
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   140
 
<a name="l00131"></a>00131         {
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   141
 
<a name="l00132"></a>00132         <a class="code" href="class_c_my_server.html">CMyServer</a>* <span class="keyword">self</span>=<span class="keyword">new</span>(ELeave) <a class="code" href="class_c_my_server.html">CMyServer</a>;
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<a name="l00133"></a>00133         CleanupStack::PushL(<span class="keyword">self</span>);
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   143
 
<a name="l00134"></a>00134         <span class="keyword">self</span>-&gt;ConstructL();
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<a name="l00135"></a>00135         <span class="keywordflow">return</span> <span class="keyword">self</span>;
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<a name="l00136"></a>00136         }
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   146
 
<a name="l00137"></a>00137
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   147
 
<a name="l00138"></a>00138 <span class="keywordtype">void</span> CMyServer::ConstructL()
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   148
 
<a name="l00139"></a>00139 <span class="comment">//</span>
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   149
 
<a name="l00140"></a>00140 <span class="comment">// 2nd phase construction - ensure the timer and server objects are running</span>
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   150
 
<a name="l00141"></a>00141 <span class="comment">//</span>
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   151
 
<a name="l00142"></a>00142         {
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   152
 
<a name="l00143"></a>00143         StartL(KMyServerName);
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   153
 
<a name="l00144"></a>00144         iShutdown.ConstructL();
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   154
 
<a name="l00145"></a>00145         <span class="comment">// ensure that the server still exits even if the 1st client fails to connect</span>
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   155
 
<a name="l00146"></a>00146         iShutdown.Start();
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<a name="l00147"></a>00147         }
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   157
 
<a name="l00148"></a>00148
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   158
 
<a name="l00149"></a>00149
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   159
 
<a name="l00150"></a>00150 CSession2* CMyServer::NewSessionL(<span class="keyword">const</span> TVersion&amp;,<span class="keyword">const</span> RMessage2&amp;) const
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   160
 
<a name="l00151"></a>00151 <span class="comment">//</span>
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   161
 
<a name="l00152"></a>00152 <span class="comment">// Cretae a new client session. This should really check the version number.</span>
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   162
 
<a name="l00153"></a>00153 <span class="comment">//</span>
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   163
 
<a name="l00154"></a>00154         {
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   164
 
<a name="l00155"></a>00155         <span class="keywordflow">return</span> <span class="keyword">new</span>(ELeave) <a class="code" href="class_c_my_session.html">CMySession</a>();
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   165
 
<a name="l00156"></a>00156         }
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diff changeset 
   166
 
<a name="l00157"></a>00157
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   167
 
<a name="l00158"></a>00158 <span class="keywordtype">void</span> CMyServer::AddSession()
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   168
 
<a name="l00159"></a>00159 <span class="comment">//</span>
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   169
 
<a name="l00160"></a>00160 <span class="comment">// A new session is being created</span>
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   170
 
<a name="l00161"></a>00161 <span class="comment">// Cancel the shutdown timer if it was running</span>
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   171
 
<a name="l00162"></a>00162 <span class="comment">//</span>
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   172
 
<a name="l00163"></a>00163         {
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   173
 
<a name="l00164"></a>00164         ++iSessionCount;
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   174
 
<a name="l00165"></a>00165         iShutdown.Cancel();
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<a name="l00166"></a>00166         }
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   176
 
<a name="l00167"></a>00167
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   177
 
<a name="l00168"></a>00168 <span class="keywordtype">void</span> CMyServer::DropSession()
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   178
 
<a name="l00169"></a>00169 <span class="comment">//</span>
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   179
 
<a name="l00170"></a>00170 <span class="comment">// A session is being destroyed</span>
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   180
 
<a name="l00171"></a>00171 <span class="comment">// Start the shutdown timer if it is the last session.</span>
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   181
 
<a name="l00172"></a>00172 <span class="comment">//</span>
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   182
 
<a name="l00173"></a>00173         {
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   183
 
<a name="l00174"></a>00174         <span class="keywordflow">if</span> (--iSessionCount==0)
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   184
 
<a name="l00175"></a>00175                 iShutdown.Start();
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   185
 
<a name="l00176"></a>00176         }
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diff changeset 
   186
 
<a name="l00177"></a>00177
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   187
 
<a name="l00178"></a>00178 <span class="keywordtype">void</span> CMyServer::Send(<span class="keyword">const</span> TDesC&amp; aMessage)
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   188
 
<a name="l00179"></a>00179 <span class="comment">//</span>
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   189
 
<a name="l00180"></a>00180 <span class="comment">// Pass on the signal to all clients</span>
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   190
 
<a name="l00181"></a>00181 <span class="comment">//</span>
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diff changeset 
   191
 
<a name="l00182"></a>00182         {
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   192
 
<a name="l00183"></a>00183         iSessionIter.SetToFirst();
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   193
 
<a name="l00184"></a>00184         CSession2* s;
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   194
 
<a name="l00185"></a>00185         <span class="keywordflow">while</span> ((s=iSessionIter++)!=0)
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   195
 
<a name="l00186"></a>00186                 <span class="keyword">static_cast&lt;</span><a class="code" href="class_c_my_session.html">CMySession</a>*<span class="keyword">&gt;</span>(s)-&gt;Send(aMessage);
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   196
 
<a name="l00187"></a>00187         }
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diff changeset 
   197
 
<a name="l00188"></a>00188
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   198
 
<a name="l00189"></a>00189 <span class="keywordtype">void</span> PanicClient(<span class="keyword">const</span> RMessagePtr2&amp; aMessage,TMyPanic aPanic)
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   199
 
<a name="l00190"></a>00190 <span class="comment">//</span>
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   200
 
<a name="l00191"></a>00191 <span class="comment">// RMessage::Panic() also completes the message. This is:</span>
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   201
 
<a name="l00192"></a>00192 <span class="comment">// (a) important for efficient cleanup within the kernel</span>
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   202
 
<a name="l00193"></a>00193 <span class="comment">// (b) a problem if the message is completed a second time</span>
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   203
 
<a name="l00194"></a>00194 <span class="comment">//</span>
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   204
 
<a name="l00195"></a>00195         {
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   205
 
<a name="l00196"></a>00196         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KPanic,<span class="stringliteral">&quot;MyServer&quot;</span>);
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   206
 
<a name="l00197"></a>00197         aMessage.Panic(KPanic,aPanic);
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<a name="l00198"></a>00198         }
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   208
 
<a name="l00199"></a>00199
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   209
 
<a name="l00200"></a>00200 <span class="keyword">static</span> <span class="keywordtype">void</span> RunServerL()
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   210
 
<a name="l00201"></a>00201 <span class="comment">//</span>
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<a name="l00202"></a>00202 <span class="comment">// Perform all server initialisation, in particular creation of the</span>
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<a name="l00203"></a>00203 <span class="comment">// scheduler and server and then run the scheduler</span>
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<a name="l00204"></a>00204 <span class="comment">//</span>
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<a name="l00205"></a>00205         {
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<a name="l00206"></a>00206         <span class="comment">// naming the server thread after the server helps to debug panics</span>
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<a name="l00207"></a>00207         User::LeaveIfError(RThread::RenameMe(KMyServerName));
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<a name="l00208"></a>00208         <span class="comment">//</span>
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<a name="l00209"></a>00209         <span class="comment">// create and install the active scheduler we need</span>
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<a name="l00210"></a>00210         CActiveScheduler* s=<span class="keyword">new</span>(ELeave) CActiveScheduler;
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<a name="l00211"></a>00211         CleanupStack::PushL(s);
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<a name="l00212"></a>00212         CActiveScheduler::Install(s);
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<a name="l00213"></a>00213         <span class="comment">//</span>
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<a name="l00214"></a>00214         <span class="comment">// create the server (leave it on the cleanup stack)</span>
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<a name="l00215"></a>00215         CMyServer::NewLC();
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<a name="l00216"></a>00216         <span class="comment">//</span>
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<a name="l00217"></a>00217         <span class="comment">// Initialisation complete, now signal the client</span>
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<a name="l00218"></a>00218         RProcess::Rendezvous(KErrNone);
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<a name="l00219"></a>00219         <span class="comment">//</span>
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<a name="l00220"></a>00220         <span class="comment">// Ready to run</span>
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<a name="l00221"></a>00221         CActiveScheduler::Start();
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<a name="l00222"></a>00222         <span class="comment">//</span>
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<a name="l00223"></a>00223         <span class="comment">// Cleanup the server and scheduler</span>
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<a name="l00224"></a>00224         CleanupStack::PopAndDestroy(2);
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<a name="l00225"></a>00225         }
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<a name="l00226"></a>00226
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<a name="l00227"></a>00227 TInt E32Main()
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<a name="l00228"></a>00228 <span class="comment">//</span>
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<a name="l00229"></a>00229 <span class="comment">// Server process entry-point</span>
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<a name="l00230"></a>00230 <span class="comment">//</span>
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<a name="l00231"></a>00231         {
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<a name="l00232"></a>00232         __UHEAP_MARK;
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<a name="l00233"></a>00233         <span class="comment">//</span>
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<a name="l00234"></a>00234         CTrapCleanup* cleanup=CTrapCleanup::New();
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<a name="l00235"></a>00235         TInt r=KErrNoMemory;
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<a name="l00236"></a>00236         <span class="keywordflow">if</span> (cleanup)
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<a name="l00237"></a>00237                 {
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<a name="l00238"></a>00238                 TRAP(r,RunServerL());
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<a name="l00239"></a>00239                 <span class="keyword">delete</span> cleanup;
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<a name="l00240"></a>00240                 }
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<a name="l00241"></a>00241         <span class="comment">//</span>
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<a name="l00242"></a>00242         __UHEAP_MARKEND;
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<a name="l00243"></a>00243         <span class="keywordflow">return</span> r;
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<a name="l00244"></a>00244         }
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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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