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diff --git a/sw/source/core/docnode/threadmanager.hxx b/sw/source/core/docnode/threadmanager.hxx
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+++ b/sw/source/core/docnode/threadmanager.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 .
+ */
+#ifndef INCLUDED_SW_SOURCE_CORE_DOCNODE_THREADMANAGER_HXX
+#define INCLUDED_SW_SOURCE_CORE_DOCNODE_THREADMANAGER_HXX
+
+#include <vcl/idle.hxx>
+#include <osl/mutex.hxx>
+#include <osl/interlck.h>
+#include <rtl/ref.hxx>
+
+#include <deque>
+#include <cppuhelper/weakref.hxx>
+#include <observablethread.hxx>
+
+#include <memory>
+
+namespace com::sun::star::util { class XCancellable; }
+namespace com::sun::star::util { class XJobManager; }
+
+class IFinishedThreadListener;
+class ThreadListener;
+class Timer;
+
+/** class to manage threads
+
+    OD 2007-01-29 #i73788#
+    An instance of this class takes care of the starting of threads.
+    It assures that not more than <mnStartedSize> threads
+    are started.
+*/
+class ThreadManager final
+{
+    public:
+
+        explicit ThreadManager( css::uno::Reference< css::util::XJobManager > const & rThreadJoiner );
+        ~ThreadManager();
+
+        std::weak_ptr< IFinishedThreadListener > GetThreadListenerWeakRef() const;
+        void NotifyAboutFinishedThread( const oslInterlockedCount nThreadID );
+
+        /** initialization
+
+            IMPORTANT NOTE: Needs to be called directly after construction
+        */
+        void Init();
+
+        /** add thread to the thread manager and taking ownership for the thread
+
+            @return unique ID for added thread
+        */
+        oslInterlockedCount AddThread(
+                            const ::rtl::Reference< ObservableThread >& rThread );
+
+        void RemoveThread( const oslInterlockedCount nThreadID,
+                           const bool bThreadFinished = false );
+
+        DECL_LINK( TryToStartNewThread, Timer*, void );
+
+        /** suspend the starting of threads
+
+            Suspending the starting of further threads is sensible during the
+            destruction of a Writer document.
+        */
+        void SuspendStartingOfThreads()
+        {
+            osl::MutexGuard aGuard(maMutex);
+
+            mbStartingOfThreadsSuspended = true;
+        }
+
+        /** continues the starting of threads after it has been suspended
+        */
+        void ResumeStartingOfThreads();
+
+        bool StartingOfThreadsSuspended()
+        {
+            osl::MutexGuard aGuard(maMutex);
+
+            return mbStartingOfThreadsSuspended;
+        }
+
+        struct tThreadData
+        {
+            oslInterlockedCount nThreadID;
+            ::rtl::Reference< ObservableThread > pThread;
+            css::uno::Reference< css::util::XCancellable > aJob;
+
+            tThreadData()
+                : nThreadID( 0 ),
+                  aJob()
+            {}
+        };
+
+    private:
+
+        static const std::deque< tThreadData >::size_type mnStartedSize;
+
+        osl::Mutex maMutex;
+
+        css::uno::WeakReference< css::util::XJobManager > mrThreadJoiner;
+
+        std::shared_ptr< ThreadListener > mpThreadListener;
+
+        oslInterlockedCount mnThreadIDCounter;
+
+        std::deque< tThreadData > maWaitingForStartThreads;
+        std::deque< tThreadData > maStartedThreads;
+
+        Idle maStartNewThreadIdle;
+
+        bool mbStartingOfThreadsSuspended;
+
+        struct ThreadPred
+        {
+            oslInterlockedCount mnThreadID;
+            explicit ThreadPred( oslInterlockedCount nThreadID )
+                : mnThreadID( nThreadID )
+            {}
+
+            bool operator() ( const tThreadData& rThreadData ) const
+            {
+                return rThreadData.nThreadID == mnThreadID;
+            }
+        };
+
+        bool StartWaitingThread();
+
+        bool StartThread( const tThreadData& aThreadData );
+};
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */