Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/threadserver_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/AdvancedClientServerExample/ThreadServer/src/threadserver.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>
<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">//</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="preprocessor">#include "threadserver.h"</span>
<a name="l00017"></a>00017 <span class="preprocessor">#include "threadserverstart.h"</span>
<a name="l00018"></a>00018 <span class="preprocessor">#include "threadserversession.h"</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="keyword">const</span> TInt KThreadServerShutDownDelay = 50000000; <span class="comment">//50 sec</span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="comment">//******CThreadServer******//</span>
<a name="l00027"></a><a class="code" href="class_c_thread_server.html#a7c41592480f2c412599c332f52a61347">00027</a> <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="class_c_thread_server.html#a7c41592480f2c412599c332f52a61347">CThreadServer::NewLC</a>()
<a name="l00028"></a>00028 {
<a name="l00029"></a>00029 <a class="code" href="class_c_thread_server.html">CThreadServer</a>* s = <span class="keyword">new</span>(ELeave) <a class="code" href="class_c_thread_server.html">CThreadServer</a>();
<a name="l00030"></a>00030 CleanupStack::PushL(s);
<a name="l00031"></a>00031 s->ConstructL();
<a name="l00032"></a>00032 }
<a name="l00036"></a>00036 CThreadServer::CThreadServer()
<a name="l00037"></a>00037 :CServer2(EPriorityStandard, ESharableSessions),iDriverState(EStateUnknown)
<a name="l00038"></a>00038 {
<a name="l00039"></a>00039 }
<a name="l00040"></a>00040 <span class="keywordtype">void</span> CThreadServer::ConstructL()
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042 <span class="comment">// Call CServer2::StartL() before any other functions inside ConstructL</span>
<a name="l00043"></a>00043 <span class="comment">// to avoid errors other than KErrAlreadyExists when the duplicate Server starts</span>
<a name="l00044"></a>00044 StartL(KThreadServerName);
<a name="l00045"></a>00045 iDelayThreadServerShutDown = <a class="code" href="class_c_delay_server_shut_down.html#ab57ff972b3f6f5807c26de442521f637">CDelayServerShutDown::NewL</a>();
<a name="l00046"></a>00046 }
<a name="l00050"></a><a class="code" href="class_c_thread_server.html#aadfbd81c8ebdf682c5ea26e837024f39">00050</a> <a class="code" href="class_c_thread_server.html#aadfbd81c8ebdf682c5ea26e837024f39">CThreadServer::~CThreadServer</a>()
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 <span class="keywordflow">if</span> (iDelayThreadServerShutDown)
<a name="l00053"></a>00053 {
<a name="l00054"></a>00054 iDelayThreadServerShutDown->Cancel();
<a name="l00055"></a>00055 <span class="keyword">delete</span> iDelayThreadServerShutDown;
<a name="l00056"></a>00056 }
<a name="l00057"></a>00057 <span class="comment">// unload device driver when server terminated</span>
<a name="l00058"></a>00058 <a class="code" href="class_c_thread_server.html#a5fff82f416011501a5d3e5040a24d515">UnloadDevice</a>();
<a name="l00059"></a>00059 }
<a name="l00066"></a><a class="code" href="class_c_thread_server.html#a30edb9952525008bc2f994aa8e1c2542">00066</a> CSession2* <a class="code" href="class_c_thread_server.html#a30edb9952525008bc2f994aa8e1c2542">CThreadServer::NewSessionL</a>(<span class="keyword">const</span> TVersion& aVersion,<span class="keyword">const</span> RMessage2& <span class="comment">/*aMessage*/</span>)<span class="keyword"> const</span>
<a name="l00067"></a>00067 <span class="keyword"> </span>{
<a name="l00068"></a>00068 <span class="comment">//check whether version is compatible</span>
<a name="l00069"></a>00069 TVersion v(KThreadServerVersion,KThreadServerMinorVersionNumber,KThreadServerBuildVersionNumber);
<a name="l00070"></a>00070 <span class="keywordflow">if</span>(!User::QueryVersionSupported(v, aVersion))
<a name="l00071"></a>00071 User::Leave(KErrNotSupported);
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="comment">// construct and return the server side client session object</span>
<a name="l00074"></a>00074 <a class="code" href="class_c_thread_server.html">CThreadServer</a>& ncThis = <span class="keyword">const_cast<</span><a class="code" href="class_c_thread_server.html">CThreadServer</a>&<span class="keyword">></span>(*this);
<a name="l00075"></a>00075 <a class="code" href="class_c_thread_server_session.html">CThreadServerSession</a>* serverSession = <a class="code" href="class_c_thread_server_session.html#af108a1cbe1843ce74693f272482aa612">CThreadServerSession::NewL</a>(ncThis);
<a name="l00076"></a>00076 <span class="keywordflow">return</span> serverSession;
<a name="l00077"></a>00077 }
<a name="l00081"></a><a class="code" href="class_c_thread_server.html#ae8800ec9ca3333ebffdbc790b38b218e">00081</a> <span class="keywordtype">void</span> <a class="code" href="class_c_thread_server.html#ae8800ec9ca3333ebffdbc790b38b218e">CThreadServer::IncrementRefCount</a>()
<a name="l00082"></a>00082 {
<a name="l00083"></a>00083 iRefCount++;
<a name="l00084"></a>00084 iDelayThreadServerShutDown->Cancel(); <span class="comment">// Cancel shutdown if it has started due to no clients being connected.</span>
<a name="l00085"></a>00085 }
<a name="l00089"></a><a class="code" href="class_c_thread_server.html#add52c0ec21335f60489aa9a2478c11ab">00089</a> <span class="keywordtype">void</span> <a class="code" href="class_c_thread_server.html#add52c0ec21335f60489aa9a2478c11ab">CThreadServer::DecrementRefCount</a>()
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 iRefCount--;
<a name="l00092"></a>00092 <span class="keywordflow">if</span> ( iRefCount == 0 )
<a name="l00093"></a>00093 {
<a name="l00094"></a>00094 iDelayThreadServerShutDown-><a class="code" href="class_c_delay_server_shut_down.html#a1b51f1f1518e93bc35e65f3a789ef009">SetDelay</a>(TTimeIntervalMicroSeconds32(KThreadServerShutDownDelay));
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096 }
<a name="l00100"></a>00100 <span class="keywordtype">void</span> CThreadServer::RenameServer()
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102 <span class="comment">//Rename thread server name in order to prevent same name creation</span>
<a name="l00103"></a>00103 RThread serverThread;
<a name="l00104"></a>00104 TThreadId threadId;
<a name="l00105"></a>00105 TName name;
<a name="l00106"></a>00106 name.Append(KThreadServerName);
<a name="l00107"></a>00107 threadId = serverThread.Id();
<a name="l00108"></a>00108 name.AppendNum(threadId.Id(),EHex);
<a name="l00109"></a>00109 <span class="comment">//We are ignoring the error code returned from User::RenameThread</span>
<a name="l00110"></a>00110 <span class="comment">//as it is not important here, it may be used for profiling</span>
<a name="l00111"></a>00111 User::RenameThread(name);
<a name="l00112"></a>00112 }
<a name="l00117"></a><a class="code" href="class_c_thread_server.html#ab276a628b73ccf6b080c3e5f69a9cbba">00117</a> TInt <a class="code" href="class_c_thread_server.html#ab276a628b73ccf6b080c3e5f69a9cbba">CThreadServer::LoadDevice</a>()
<a name="l00118"></a>00118 {
<a name="l00119"></a>00119 <span class="keywordflow">if</span> (iDriverState>=EDriverLoaded && iDriverState<EDriverUnloaded)
<a name="l00120"></a>00120 <span class="keywordflow">return</span> KErrNone; <span class="comment">//Device has been loaded, return immediately</span>
<a name="l00121"></a>00121
<a name="l00122"></a>00122 TInt r=User::LoadPhysicalDevice(KThreadServerDriverPddFileName);
<a name="l00123"></a>00123 <span class="keywordflow">if</span> (r!=KErrNone && r!=KErrAlreadyExists)
<a name="l00124"></a>00124 <span class="keywordflow">return</span> r; <span class="comment">//some error occurred</span>
<a name="l00125"></a>00125
<a name="l00126"></a>00126 r = User::LoadLogicalDevice(KThreadServerDriverLddFileName);
<a name="l00127"></a>00127 <span class="keywordflow">if</span> (r!=KErrNone && r!=KErrAlreadyExists)
<a name="l00128"></a>00128 <span class="keywordflow">return</span> r; <span class="comment">//some error occurred </span>
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <span class="comment">//both PDD and LDD have been loaded</span>
<a name="l00131"></a>00131 <a class="code" href="class_c_thread_server.html#a631c9159f8d0d91fc3136f1012663851">UpdateDriverState</a>(EDriverLoaded);
<a name="l00132"></a>00132 <span class="keywordflow">return</span> KErrNone;
<a name="l00133"></a>00133 }
<a name="l00138"></a><a class="code" href="class_c_thread_server.html#a5fff82f416011501a5d3e5040a24d515">00138</a> TInt <a class="code" href="class_c_thread_server.html#a5fff82f416011501a5d3e5040a24d515">CThreadServer::UnloadDevice</a>()
<a name="l00139"></a>00139 {
<a name="l00140"></a>00140 <span class="keywordflow">if</span> (iDriverState==EDriverUnloaded || iDriverState == EStateUnknown)
<a name="l00141"></a>00141 <span class="keywordflow">return</span> KErrNone; <span class="comment">//no device is loaded, return immediately</span>
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <span class="comment">// close device</span>
<a name="l00144"></a>00144 <span class="keywordflow">if</span> (iDriver.Handle())
<a name="l00145"></a>00145 iDriver.Close();
<a name="l00146"></a>00146 <span class="comment">// Unload Logical Device</span>
<a name="l00147"></a>00147 TInt r = User::FreeLogicalDevice(<a class="code" href="class_r_driver1.html#a7e98e9f7ec04a53a404d646481f589ca">RDriver1::Name</a>());
<a name="l00148"></a>00148 <span class="keywordflow">if</span> (r!=KErrNone)
<a name="l00149"></a>00149 <span class="keywordflow">return</span> r;
<a name="l00150"></a>00150 <span class="comment">// Unload Physical Device</span>
<a name="l00151"></a>00151 TName pddName(<a class="code" href="class_r_driver1.html#a7e98e9f7ec04a53a404d646481f589ca">RDriver1::Name</a>());
<a name="l00152"></a>00152 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KVariantExtension,<span class="stringliteral">".template"</span>);
<a name="l00153"></a>00153 pddName.Append(KVariantExtension);
<a name="l00154"></a>00154 r=User::FreePhysicalDevice(pddName);
<a name="l00155"></a>00155
<a name="l00156"></a>00156 <span class="keywordflow">if</span> (KErrNone==r)
<a name="l00157"></a>00157 <a class="code" href="class_c_thread_server.html#a631c9159f8d0d91fc3136f1012663851">UpdateDriverState</a>(EDriverUnloaded);
<a name="l00158"></a>00158 <span class="keywordflow">return</span> r;
<a name="l00159"></a>00159 }
<a name="l00164"></a><a class="code" href="class_c_thread_server.html#a50d46df581a8dd334babd2441bd21154">00164</a> TInt <a class="code" href="class_c_thread_server.html#a50d46df581a8dd334babd2441bd21154">CThreadServer::OpenLogicalChannel</a>()
<a name="l00165"></a>00165 {
<a name="l00166"></a>00166 <span class="keywordflow">if</span> (iDriverState>=ELogicalChannelOpened && iDriverState<ELogicalChannelClosed)
<a name="l00167"></a>00167 <span class="keywordflow">return</span> KErrNone;
<a name="l00168"></a>00168
<a name="l00169"></a>00169 TInt r = iDriver.<a class="code" href="class_r_driver1.html#af30696b673cd91e87f9c7497a72798eb">Open</a>();
<a name="l00170"></a>00170 <span class="keywordflow">if</span> (KErrNone==r)
<a name="l00171"></a>00171 <a class="code" href="class_c_thread_server.html#a631c9159f8d0d91fc3136f1012663851">UpdateDriverState</a>(ELogicalChannelOpened);
<a name="l00172"></a>00172
<a name="l00173"></a>00173 <span class="keywordflow">return</span> r;
<a name="l00174"></a>00174 }
<a name="l00178"></a><a class="code" href="class_c_thread_server.html#abebdf4dc3dbbe186b9bf20ea3d16681f">00178</a> <span class="keywordtype">void</span> <a class="code" href="class_c_thread_server.html#abebdf4dc3dbbe186b9bf20ea3d16681f">CThreadServer::CloseLogicalChannel</a>()
<a name="l00179"></a>00179 {
<a name="l00180"></a>00180 <span class="keywordflow">if</span> (iDriver.Handle())
<a name="l00181"></a>00181 {
<a name="l00182"></a>00182 iDriver.Close();
<a name="l00183"></a>00183 <a class="code" href="class_c_thread_server.html#a631c9159f8d0d91fc3136f1012663851">UpdateDriverState</a>(ELogicalChannelClosed);
<a name="l00184"></a>00184 }
<a name="l00185"></a>00185 }
<a name="l00192"></a><a class="code" href="class_c_thread_server.html#a5d9fd415bca412e6f73b8c80cdf60f29">00192</a> TInt <a class="code" href="class_c_thread_server.html#a5d9fd415bca412e6f73b8c80cdf60f29">CThreadServer::SendDataToDevice</a>(TRequestStatus& aStatus, <span class="keyword">const</span> TDesC8& aData)
<a name="l00193"></a>00193 {
<a name="l00194"></a>00194 TInt r = KErrNone;
<a name="l00195"></a>00195 <span class="keywordflow">if</span> (iDriverState>=ELogicalChannelOpened && iDriverState<ELogicalChannelClosed)
<a name="l00196"></a>00196 {
<a name="l00197"></a>00197 iDriver.<a class="code" href="class_r_driver1.html#a2b99c6487e8916a54720d8eb3071cd85">SendData</a>(aStatus, aData);
<a name="l00198"></a>00198 <a class="code" href="class_c_thread_server.html#a631c9159f8d0d91fc3136f1012663851">UpdateDriverState</a>(ESendingData);
<a name="l00199"></a>00199 }
<a name="l00200"></a>00200 <span class="keywordflow">else</span>
<a name="l00201"></a>00201 {
<a name="l00202"></a>00202 r = KErrArgument;
<a name="l00203"></a>00203 }
<a name="l00204"></a>00204 <span class="keywordflow">return</span> r;
<a name="l00205"></a>00205 }
<a name="l00209"></a><a class="code" href="class_c_thread_server.html#afa4844b8aec06286cc5a29d11f12ae47">00209</a> <span class="keywordtype">void</span> <a class="code" href="class_c_thread_server.html#afa4844b8aec06286cc5a29d11f12ae47">CThreadServer::CancelSendData</a>()
<a name="l00210"></a>00210 {
<a name="l00211"></a>00211 iDriver.<a class="code" href="class_r_driver1.html#a3a9b32b811f9bec9b3317d2b187b8417">SendDataCancel</a>();
<a name="l00212"></a>00212 <a class="code" href="class_c_thread_server.html#a631c9159f8d0d91fc3136f1012663851">UpdateDriverState</a>(ELogicalChannelOpened);
<a name="l00213"></a>00213 }
<a name="l00218"></a><a class="code" href="class_c_thread_server.html#a631c9159f8d0d91fc3136f1012663851">00218</a> <span class="keywordtype">void</span> <a class="code" href="class_c_thread_server.html#a631c9159f8d0d91fc3136f1012663851">CThreadServer::UpdateDriverState</a>(<a class="code" href="class_c_thread_server.html#afb6315c557a5690492f0441ae493b512">TDriverState</a> aState)
<a name="l00219"></a>00219 {
<a name="l00220"></a>00220 iDriverState = aState;
<a name="l00221"></a>00221 }
<a name="l00222"></a>00222 <span class="comment">//EOF</span>
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