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diff --git a/comphelper/source/misc/instancelocker.hxx b/comphelper/source/misc/instancelocker.hxx
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+++ b/comphelper/source/misc/instancelocker.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/util/XCloseListener.hpp>
+#include <com/sun/star/frame/XTerminateListener.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <comphelper/interfacecontainer4.hxx>
+#include <cppuhelper/weakref.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <rtl/ref.hxx>
+#include <mutex>
+
+namespace com::sun::star::embed { class XActionsApproval; }
+
+
+class OLockListener;
+
+// the service is implemented as a wrapper to be able to die by refcount
+// the disposing mechanics is required for java related scenarios
+class OInstanceLocker : public ::cppu::WeakImplHelper< css::lang::XComponent,
+                                                       css::lang::XInitialization,
+                                                       css::lang::XServiceInfo >
+{
+    std::mutex m_aMutex;
+
+    rtl::Reference< OLockListener > m_xLockListener;
+
+    comphelper::OInterfaceContainerHelper4<css::lang::XEventListener> m_aListenersContainer; // list of listeners
+
+    bool m_bDisposed;
+    bool m_bInitialized;
+
+public:
+    explicit OInstanceLocker();
+    virtual ~OInstanceLocker() override;
+
+// XComponent
+    virtual void SAL_CALL dispose() override;
+    virtual void SAL_CALL addEventListener( const css::uno::Reference< css::lang::XEventListener >& xListener ) override;
+    virtual void SAL_CALL removeEventListener( const css::uno::Reference< css::lang::XEventListener >& aListener ) override;
+
+// XInitialization
+    virtual void SAL_CALL initialize( const css::uno::Sequence< css::uno::Any >& aArguments ) override;
+
+// XServiceInfo
+    virtual OUString SAL_CALL getImplementationName(  ) override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames(  ) override;
+
+};
+
+
+class OLockListener : public ::cppu::WeakImplHelper< css::util::XCloseListener,
+                                                     css::frame::XTerminateListener >
+{
+    std::mutex m_aMutex;
+    css::uno::Reference< css::uno::XInterface > m_xInstance;
+    css::uno::Reference< css::embed::XActionsApproval > m_xApproval;
+
+    css::uno::WeakReference< css::lang::XComponent > m_xWrapper;
+
+    bool m_bDisposed;
+    bool m_bInitialized;
+
+    sal_Int32 m_nMode;
+
+public:
+    OLockListener(  css::uno::WeakReference< css::lang::XComponent > xWrapper,
+                    css::uno::Reference< css::uno::XInterface > xInstance,
+                    sal_Int32 nMode,
+                    css::uno::Reference< css::embed::XActionsApproval > xApproval );
+
+    virtual ~OLockListener() override;
+
+    void Init();
+    void Dispose();
+
+// XEventListener
+    virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+// XCloseListener
+    virtual void SAL_CALL queryClosing( const css::lang::EventObject& Source, sal_Bool GetsOwnership ) override;
+    virtual void SAL_CALL notifyClosing( const css::lang::EventObject& Source ) override;
+
+// XTerminateListener
+    virtual void SAL_CALL queryTermination( const css::lang::EventObject& Event ) override;
+    virtual void SAL_CALL notifyTermination( const css::lang::EventObject& Event ) override;
+
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */