Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_complex_server_c_count_session_8cpp_source.html
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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<h1>examples/Base/IPC/ClientServer/Complex/ComplexServerCCountSession.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>
<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 <span class="comment">// Description:</span>
<a name="l00014"></a>00014 <span class="comment">// ComplexServer.cpp</span>
<a name="l00015"></a>00015 <span class="comment">//</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="preprocessor">#include "ComplexClientAndServer.h"</span>
<a name="l00018"></a>00018 <span class="preprocessor">#include "ComplexServer.h"</span>
<a name="l00019"></a>00019 <span class="preprocessor">#include <e32svr.h></span>
<a name="l00020"></a>00020 <span class="preprocessor">#include <e32uid.h></span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="comment">//*******************************</span>
<a name="l00024"></a>00024 <span class="comment">//CCountSession - implementations</span>
<a name="l00025"></a>00025 <span class="comment">//*******************************</span>
<a name="l00026"></a>00026
<a name="l00030"></a>00030 CCountSession::CCountSession()
<a name="l00031"></a>00031 {
<a name="l00032"></a>00032 }
<a name="l00033"></a>00033
<a name="l00034"></a>00034
<a name="l00048"></a>00048 <span class="keywordtype">void</span> CCountSession::CreateL()
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050 <span class="comment">// Create new object index</span>
<a name="l00051"></a>00051 iCountersObjectIndex=CObjectIx::NewL();
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <span class="comment">// Initialize the object container</span>
<a name="l00054"></a>00054 <span class="comment">// using the object container index in the server.</span>
<a name="l00055"></a>00055 iContainer=((CCountServer*)Server())->NewContainerL();
<a name="l00056"></a>00056 }
<a name="l00057"></a>00057
<a name="l00058"></a>00058
<a name="l00066"></a>00066 <span class="keywordtype">void</span> CCountSession::CloseSession()
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 <span class="comment">// Deletes the object index.</span>
<a name="l00069"></a>00069 <span class="keyword">delete</span> iCountersObjectIndex;
<a name="l00070"></a>00070 iCountersObjectIndex = NULL;
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="comment">// Removes object container from the container list </span>
<a name="l00073"></a>00073 ((CCountServer*)Server())->RemoveContainer(iContainer);
<a name="l00074"></a>00074 iContainer = NULL;
<a name="l00075"></a>00075 }
<a name="l00076"></a>00076
<a name="l00077"></a>00077
<a name="l00083"></a>00083 CCountSubSession* CCountSession::CounterFromHandle(<span class="keyword">const</span> RMessage2& aMessage,TInt aHandle)
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085 CCountSubSession* counter = (CCountSubSession*)iCountersObjectIndex->At(aHandle);
<a name="l00086"></a>00086 <span class="keywordflow">if</span> (counter == NULL)
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 PanicClient(aMessage, <a class="code" href="secureserver_8h.html#a091a5ad2956fb84c4470a59010a0d4efaeebad163989c978b8edd91b6893411c0">EBadSubsessionHandle</a>);
<a name="l00089"></a>00089 }
<a name="l00090"></a>00090 <span class="keywordflow">return</span> counter;
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092
<a name="l00093"></a>00093
<a name="l00094"></a>00094
<a name="l00104"></a>00104 <span class="keywordtype">void</span> CCountSession::ServiceL(<span class="keyword">const</span> RMessage2& aMessage)
<a name="l00105"></a>00105 {
<a name="l00106"></a>00106 TRAPD(err,DispatchMessageL(aMessage));
<a name="l00107"></a>00107 aMessage.Complete(err);
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109
<a name="l00110"></a>00110
<a name="l00117"></a>00117 <span class="keywordtype">void</span> CCountSession::DispatchMessageL(<span class="keyword">const</span> RMessage2& aMessage)
<a name="l00118"></a>00118 {
<a name="l00119"></a>00119 <span class="comment">// First check for session-relative requests</span>
<a name="l00120"></a>00120 <span class="keywordflow">switch</span> (aMessage.Function())
<a name="l00121"></a>00121 {
<a name="l00122"></a>00122 <span class="keywordflow">case</span> ECountServCreateSubSession:
<a name="l00123"></a>00123 NewCounterL(aMessage);
<a name="l00124"></a>00124 <span class="keywordflow">return</span>;
<a name="l00125"></a>00125 <span class="keywordflow">case</span> ECountServCloseSession:
<a name="l00126"></a>00126 CloseSession();
<a name="l00127"></a>00127 <span class="keywordflow">return</span>;
<a name="l00128"></a>00128 <span class="keywordflow">case</span> ECountServResourceCount:
<a name="l00129"></a>00129 NumResourcesL(aMessage);
<a name="l00130"></a>00130 <span class="keywordflow">return</span>;
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132
<a name="l00133"></a>00133 <span class="comment">// All other function codes must be subsession relative.</span>
<a name="l00134"></a>00134 <span class="comment">// We need to find the appropriate server side subsession</span>
<a name="l00135"></a>00135 <span class="comment">// i.e. the CCountSubSession object. </span>
<a name="l00136"></a>00136 <span class="comment">// The handle value is passed as the 4th aregument.</span>
<a name="l00137"></a>00137 CCountSubSession* counter=CounterFromHandle(aMessage,aMessage.Int3());
<a name="l00138"></a>00138 <span class="keywordflow">switch</span> (aMessage.Function())
<a name="l00139"></a>00139 {
<a name="l00140"></a>00140 <span class="keywordflow">case</span> ECountServInitSubSession:
<a name="l00141"></a>00141 counter->SetFromStringL(aMessage);
<a name="l00142"></a>00142 <span class="keywordflow">return</span>;
<a name="l00143"></a>00143 <span class="keywordflow">case</span> ECountServCloseSubSession:
<a name="l00144"></a>00144 DeleteCounter(aMessage.Int3());
<a name="l00145"></a>00145 <span class="keywordflow">return</span>;
<a name="l00146"></a>00146 <span class="keywordflow">case</span> ECountServIncrease:
<a name="l00147"></a>00147 counter->Increase();
<a name="l00148"></a>00148 <span class="keywordflow">return</span>;
<a name="l00149"></a>00149 <span class="keywordflow">case</span> ECountServIncreaseBy:
<a name="l00150"></a>00150 counter->IncreaseBy(aMessage);
<a name="l00151"></a>00151 <span class="keywordflow">return</span>;
<a name="l00152"></a>00152 <span class="keywordflow">case</span> ECountServDecrease:
<a name="l00153"></a>00153 counter->Decrease();
<a name="l00154"></a>00154 <span class="keywordflow">return</span>;
<a name="l00155"></a>00155 <span class="keywordflow">case</span> ECountServDecreaseBy:
<a name="l00156"></a>00156 counter->DecreaseBy(aMessage);
<a name="l00157"></a>00157 <span class="keywordflow">return</span>;
<a name="l00158"></a>00158 <span class="keywordflow">case</span> ECountServReset:
<a name="l00159"></a>00159 counter->Reset();
<a name="l00160"></a>00160 <span class="keywordflow">return</span>;
<a name="l00161"></a>00161 <span class="keywordflow">case</span> ECountServValue:
<a name="l00162"></a>00162 counter->CounterValueL(aMessage);
<a name="l00163"></a>00163 <span class="keywordflow">return</span>;
<a name="l00164"></a>00164 <span class="keywordflow">default</span>:
<a name="l00165"></a>00165 PanicClient(aMessage,<a class="code" href="secureserver_8h.html#a091a5ad2956fb84c4470a59010a0d4efaeef6b7f2a8413e6863e2136b93228c3a">EBadRequest</a>);
<a name="l00166"></a>00166 <span class="keywordflow">return</span>;
<a name="l00167"></a>00167 }
<a name="l00168"></a>00168 }
<a name="l00169"></a>00169
<a name="l00170"></a>00170
<a name="l00178"></a>00178 <span class="keywordtype">void</span> CCountSession::NewCounterL(<span class="keyword">const</span> RMessage2& aMessage)
<a name="l00179"></a>00179 {
<a name="l00180"></a>00180 <span class="comment">// make a new counter object</span>
<a name="l00181"></a>00181 CCountSubSession* counter= <span class="keyword">new</span> (ELeave) CCountSubSession(<span class="keyword">this</span>);
<a name="l00182"></a>00182
<a name="l00183"></a>00183 <span class="comment">// add the CCountSubSession object to </span>
<a name="l00184"></a>00184 <span class="comment">// this subsession's object container</span>
<a name="l00185"></a>00185 <span class="comment">// to gererate a unique id</span>
<a name="l00186"></a>00186 iContainer->AddL(counter);
<a name="l00187"></a>00187
<a name="l00188"></a>00188 <span class="comment">// Add the object to object index; this returns</span>
<a name="l00189"></a>00189 <span class="comment">// a unique handle so that we can find the object</span>
<a name="l00190"></a>00190 <span class="comment">// again laterit later.</span>
<a name="l00191"></a>00191 TInt handle=iCountersObjectIndex->AddL(counter);
<a name="l00192"></a>00192
<a name="l00193"></a>00193 <span class="comment">// Write the handle value back to the client.</span>
<a name="l00194"></a>00194 <span class="comment">// NB It's not obvious but the handle value must be passed</span>
<a name="l00195"></a>00195 <span class="comment">// back as the 4th parameter (i.e. parameter number 3 on</span>
<a name="l00196"></a>00196 <span class="comment">// a scale of 0 to 3). </span>
<a name="l00197"></a>00197 <span class="comment">// The arguments that are passed across are actually</span>
<a name="l00198"></a>00198 <span class="comment">// set up by RSubSessionBase::DoCreateSubSession().</span>
<a name="l00199"></a>00199 <span class="comment">// If you pass your own arguments into a call</span>
<a name="l00200"></a>00200 <span class="comment">// to RSubSessionBase::CreateSubSession(), which calls DoCreateSubSession, </span>
<a name="l00201"></a>00201 <span class="comment">// then only the first three are picked up - the 4th is reserved for the</span>
<a name="l00202"></a>00202 <span class="comment">// the subsession handle.</span>
<a name="l00203"></a>00203 TPckgBuf<TInt> handlePckg(handle);
<a name="l00204"></a>00204 TRAPD(res,aMessage.WriteL(3,handlePckg));
<a name="l00205"></a>00205 <span class="keywordflow">if</span> (res!=KErrNone)
<a name="l00206"></a>00206 {
<a name="l00207"></a>00207 iCountersObjectIndex->Remove(handle);
<a name="l00208"></a>00208 PanicClient(aMessage,EBadDescriptor);
<a name="l00209"></a>00209 <span class="keywordflow">return</span>;
<a name="l00210"></a>00210 }
<a name="l00211"></a>00211
<a name="l00212"></a>00212 <span class="comment">// We now have another "resource"</span>
<a name="l00213"></a>00213 iResourceCount++;
<a name="l00214"></a>00214 }
<a name="l00215"></a>00215
<a name="l00216"></a>00216
<a name="l00217"></a>00217
<a name="l00218"></a>00218
<a name="l00222"></a>00222 <span class="keywordtype">void</span> CCountSession::DeleteCounter(TInt aHandle)
<a name="l00223"></a>00223 {
<a name="l00224"></a>00224
<a name="l00225"></a>00225 <span class="comment">// This will delete the CCountSubSession object; the object is</span>
<a name="l00226"></a>00226 <span class="comment">// reference counted, and removing the handle causes the object to be closed</span>
<a name="l00227"></a>00227 <span class="comment">// [closing reduces the access count - the object is deleted if the access</span>
<a name="l00228"></a>00228 <span class="comment">// count reaches zero etc].</span>
<a name="l00229"></a>00229 iCountersObjectIndex->Remove(aHandle);
<a name="l00230"></a>00230 <span class="comment">// decrement resource count</span>
<a name="l00231"></a>00231 iResourceCount--;
<a name="l00232"></a>00232 }
<a name="l00233"></a>00233
<a name="l00234"></a>00234
<a name="l00235"></a>00235 <span class="comment">// return the number of resources owned by the session</span>
<a name="l00236"></a>00236 <span class="comment">// required by CSession if derived class implements resource</span>
<a name="l00237"></a>00237 <span class="comment">// mark-start and mark-end protocol</span>
<a name="l00238"></a>00238 TInt CCountSession::CountResources()
<a name="l00239"></a>00239 {
<a name="l00240"></a>00240 <span class="keywordflow">return</span> iResourceCount;
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242
<a name="l00243"></a>00243
<a name="l00248"></a>00248 <span class="keywordtype">void</span> CCountSession::NumResourcesL(<span class="keyword">const</span> RMessage2& aMessage)
<a name="l00249"></a>00249 {
<a name="l00250"></a>00250 TPckgBuf<TInt> resourcesPckg(iResourceCount);
<a name="l00251"></a>00251 aMessage.WriteL(0,resourcesPckg);
<a name="l00252"></a>00252 }
<a name="l00253"></a>00253
<a name="l00254"></a>00254
<a name="l00258"></a>00258 <span class="keywordtype">void</span> CCountSession::PanicClient(<span class="keyword">const</span> RMessage2& aMessage,TInt aPanic)<span class="keyword"> const</span>
<a name="l00259"></a>00259 <span class="keyword"> </span>{
<a name="l00260"></a>00260 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtServer,<span class="stringliteral">"CountServ server"</span>);
<a name="l00261"></a>00261 aMessage.Panic(KTxtServer,aPanic);
<a name="l00262"></a>00262 }
<a name="l00263"></a>00263
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