diff -r 5a06f39ad45b -r 80975da52420 mmserv/sts/stsimplementation/src/rstssession.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmserv/sts/stsimplementation/src/rstssession.cpp	Mon May 03 12:59:52 2010 +0300
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ * All rights reserved.
+ * This component and the accompanying materials are made available
+ * under the terms of "Eclipse Public License v1.0"
+ * which accompanies this distribution, and is available
+ * at the URL "http://www.eclipse.org/legal/epl-v10.html".
+ *
+ * Initial Contributors:
+ * Nokia Corporation - initial contribution.
+ *
+ * Contributors:
+ *
+ * Description:
+ * The file provides the implementation of the client side session
+ * to the STS Server.
+ */
+
+#include "rstssession.h"
+#include "stsclientservercommon.h"
+
+const TUint KNumSlots = 30;
+
+TInt RStsSession::StartServer()
+    {
+    TInt err = KErrNone;
+
+    // Launch the server executable (i.e. in it its own process).
+
+    // Create a new server process. Simultaneous launching of two such processes 
+    // should be detected when the second one attempts to create the server 
+    // object, failing with KErrAlreadyExists.
+    RProcess server;
+    err = server.Create(KStsServerFile, KNullDesC);
+
+    if (err == KErrNone)
+        {
+        TRequestStatus rendezvousStatus;
+        server.Rendezvous(rendezvousStatus);
+
+        if (rendezvousStatus != KRequestPending)
+            {
+            server.Kill(0); // abort startup
+            }
+        else
+            {
+            server.Resume(); // logon OK - start the server thread
+            } // end if
+
+        User::WaitForRequest(rendezvousStatus); // wait for start or death
+
+        // we can't use the 'exit reason' if the server panicked as this
+        // is the panic 'reason' and may be '0' which cannot be distinguished
+        // from KErrNone  
+        err = (server.ExitType() == EExitPanic)
+                                                ? KErrGeneral
+                                                   : rendezvousStatus.Int();
+        server.Close();
+        }
+
+    return err;
+    }
+
+TInt RStsSession::Connect()
+    {
+    TInt result = CreateSession(KStsServerName, TVersion(
+            KStsServerMajorVersion, KStsServerMinorVersion, KStsServerBuild),
+            KNumSlots, EIpcSession_Sharable);
+
+    if (result == KErrNotFound)
+        {
+        result = StartServer();
+        if (result == KErrNone || result == KErrAlreadyExists)
+            {
+            result = CreateSession(KStsServerName, TVersion(
+                    KStsServerMajorVersion, KStsServerMinorVersion,
+                    KStsServerBuild), KNumSlots);
+            }
+        }
+
+    if (result == KErrNone)
+        {
+        result = ShareAuto();
+
+        if (result != KErrNone)
+            {
+            Close();
+            }
+        }
+
+    return result;
+    }
+
+void RStsSession::Close()
+    {
+    RSessionBase::Close();
+    }
+
+TInt RStsSession::SendPlayTone(CSystemToneService::TToneType aToneType,
+        unsigned int& aPlayToneContext)
+    {
+    TPckg<unsigned int> playToneContextPckg(aPlayToneContext);
+    return SendReceive(StsMsg_PlayTone, TIpcArgs((TInt) aToneType,
+            &playToneContextPckg));
+    }
+
+TInt RStsSession::SendStopTone(unsigned int aPlayToneContext)
+    {
+    return SendReceive(StsMsg_StopTone, TIpcArgs(aPlayToneContext));
+    }