diff -r 000000000000 -r 72b543305e3a messagingappbase/msgavkon/muiu_internal/servicesinternal/src/MuiuLock.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/messagingappbase/msgavkon/muiu_internal/servicesinternal/src/MuiuLock.cpp	Thu Dec 17 08:44:11 2009 +0200
@@ -0,0 +1,113 @@
+/*
+* Copyright (c) 2007 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 global lock class for messaging components
+*
+*/
+
+
+
+#include <centralrepository.h>    // CRepository
+#include "MuiuLock.h"             // Own header file
+
+// ---------------------------------------------------------------------------
+// CMuiuLock::NewL
+// Runs the first and second phase constructors
+// ---------------------------------------------------------------------------
+//
+EXPORT_C CMuiuLock* CMuiuLock::NewL( TUid aLockId )
+    {
+    CMuiuLock* self = new (ELeave) CMuiuLock;
+    CleanupStack::PushL( self );
+    self->ConstructL( aLockId );
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+// ---------------------------------------------------------------------------
+// CMuiuLock::~CMuiuLock
+// Destructor. Releases the lock if needed.
+// ---------------------------------------------------------------------------
+//
+CMuiuLock::~CMuiuLock()
+    {
+    if ( iLocked )
+        {
+        Release();
+        }
+    delete iRepository;
+    }
+
+// ---------------------------------------------------------------------------
+// CMuiuLock::Reserve
+// Reserves the lock for the client by opening the read/write transaction to
+// the central repository
+// ---------------------------------------------------------------------------
+//
+EXPORT_C TInt CMuiuLock::Reserve()
+    {
+    TInt status( KErrNone );
+    
+    if ( !iLocked )
+        {
+        status = iRepository->StartTransaction( 
+            CRepository::EReadWriteTransaction );
+            
+        if ( status == KErrNone )
+            {
+            iLocked = ETrue;
+            }
+        }
+    else
+        {
+        status = KErrGeneral;
+        }
+        
+    return status;
+    }
+
+// ---------------------------------------------------------------------------
+// CMuiuLock::Release
+// Releases the lock by cancelling the transaction opened by Reserve()
+// ---------------------------------------------------------------------------
+//
+EXPORT_C void CMuiuLock::Release()
+    {
+    if ( iLocked )
+        {
+        iRepository->CancelTransaction();
+        iLocked = EFalse;
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// CMuiuLock::CMuiuLock
+// First phase constructor. Just initialises the data members.
+// ---------------------------------------------------------------------------
+//
+CMuiuLock::CMuiuLock() :
+    iRepository ( NULL ),
+    iLocked ( EFalse )
+    {
+    // none
+    }
+
+// ---------------------------------------------------------------------------
+// CMuiuLock::ConstructL
+// Second phase constructor. Creates the central repository handle.
+// ---------------------------------------------------------------------------
+//
+void CMuiuLock::ConstructL( TUid aLockId )
+    {
+    iRepository = CRepository::NewL( aLockId );
+    }