diff -r 000000000000 -r a2952bb97e68 mmappcomponents/mmmtpdataprovider/src/cmmmtpdpaccesssingleton.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmappcomponents/mmmtpdataprovider/src/cmmmtpdpaccesssingleton.cpp	Thu Dec 17 08:55:47 2009 +0200
@@ -0,0 +1,160 @@
+/*
+* Copyright (c) 2009 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:  Meta data access singleton
+*
+*/
+
+
+#include <e32base.h>    // CObject
+
+#include "cmmmtpdpaccesssingleton.h"
+#include "cmmmtpdpmetadataaccesswrapper.h"
+#include "mmmtpdplogger.h"
+
+// -----------------------------------------------------------------------------
+// CMmMtpDpAccessSingleton::~CMmMtpDpAccessSingleton
+// destructor
+// -----------------------------------------------------------------------------
+//
+CMmMtpDpAccessSingleton::~CMmMtpDpAccessSingleton()
+    {
+    delete iWrapper;
+    }
+
+// -----------------------------------------------------------------------------
+// CMmMtpDpAccessSingleton::GetAccessWrapperL
+// get wrapper instance
+// -----------------------------------------------------------------------------
+//
+EXPORT_C CMmMtpDpMetadataAccessWrapper& CMmMtpDpAccessSingleton::GetAccessWrapperL()
+    {
+    CMmMtpDpAccessSingleton* self = CMmMtpDpAccessSingleton::Instance();
+    User::LeaveIfNull( self );
+
+    return *( self->iWrapper );
+    }
+
+// -----------------------------------------------------------------------------
+// CMmMtpDpAccessSingleton::CreateL
+// create singleton instance
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void CMmMtpDpAccessSingleton::CreateL( RFs& aRfs,
+    MMTPDataProviderFramework& aFramework )
+    {
+    CMmMtpDpAccessSingleton* self = reinterpret_cast<CMmMtpDpAccessSingleton*>( Dll::Tls() );
+
+    if ( self == NULL )
+        {
+        self = CMmMtpDpAccessSingleton::NewL( aRfs, aFramework );
+        Dll::SetTls( reinterpret_cast<TAny*>( self ) );
+        }
+    else
+        {
+        self->Inc();
+        }
+
+    PRINT1( _L("MM MTP <> CMmMtpDpAccessSingleton::CreateL, AccessCount: %d"),
+        self->AccessCount() );
+    }
+
+// -----------------------------------------------------------------------------
+// CMmMtpDpAccessSingleton::Release
+// release singleton instance
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void CMmMtpDpAccessSingleton::Release()
+    {
+    CMmMtpDpAccessSingleton* self = reinterpret_cast<CMmMtpDpAccessSingleton*>( Dll::Tls() );
+    if ( self != NULL )
+        {
+        PRINT1( _L("MM MTP <> CMmMtpDpAccessSingleton::Release, singleton != NULL, AccessCount: %d"),
+            self->AccessCount() );
+
+        self->Dec();
+        if ( self->AccessCount() == 0 )
+            {
+            PRINT( _L("MM MTP <> CMmMtpDpAccessSingleton::Release, AccessCount == 0, delete it") );
+            delete self;
+            Dll::SetTls( NULL );
+            }
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CMmMtpDpAccessSingleton::OpenSessionL
+// do some special process with assess DBs when receives opensession command
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void CMmMtpDpAccessSingleton::OpenSessionL()
+    {
+    PRINT( _L("MM MTP => CMmMtpDpAccessSingleton::OpenSessionL") );
+    CMmMtpDpAccessSingleton* self = CMmMtpDpAccessSingleton::Instance();
+    User::LeaveIfNull( self );
+    self->GetAccessWrapperL().OpenSessionL();
+    PRINT( _L("MM MTP <= CMmMtpDpAccessSingleton::OpenSessionL") );
+    }
+
+// -----------------------------------------------------------------------------
+// CMmMtpDpAccessSingleton::CloseSessionL
+// do some special process with assess DBs when receives closesession command
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void CMmMtpDpAccessSingleton::CloseSessionL()
+    {
+    PRINT( _L("MM MTP => CMmMtpDpAccessSingleton::CloseSessionL") );
+    CMmMtpDpAccessSingleton* self = CMmMtpDpAccessSingleton::Instance();
+    User::LeaveIfNull( self );
+    self->GetAccessWrapperL().CloseSessionL();
+    PRINT( _L("MM MTP <= CMmMtpDpAccessSingleton::CloseSessionL") );
+    }
+
+// -----------------------------------------------------------------------------
+// CMmMtpDpAccessSingleton::Instance
+// get singleton instance, for internal use
+// -----------------------------------------------------------------------------
+//
+CMmMtpDpAccessSingleton* CMmMtpDpAccessSingleton::Instance()
+    {
+    return reinterpret_cast<CMmMtpDpAccessSingleton*>( Dll::Tls() );
+    }
+
+// -----------------------------------------------------------------------------
+// CMmMtpDpAccessSingleton::NewL
+// two-phase construction
+// -----------------------------------------------------------------------------
+//
+CMmMtpDpAccessSingleton* CMmMtpDpAccessSingleton::NewL( RFs& aRfs,
+    MMTPDataProviderFramework& aFramework )
+    {
+    CMmMtpDpAccessSingleton* self = new(ELeave) CMmMtpDpAccessSingleton;
+    CleanupStack::PushL( self );
+    self->ConstructL(aRfs, aFramework);
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+// -----------------------------------------------------------------------------
+// CMmMtpDpAccessSingleton::ConstructL
+// two-phase construction
+// -----------------------------------------------------------------------------
+//
+void CMmMtpDpAccessSingleton::ConstructL( RFs& aRfs,
+    MMTPDataProviderFramework& aFramework )
+    {
+    iWrapper = CMmMtpDpMetadataAccessWrapper::NewL( aRfs, aFramework );
+    }
+
+
+// end of file