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diff --git a/sw/source/uibase/inc/maildispatcher.hxx b/sw/source/uibase/inc/maildispatcher.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_UIBASE_INC_MAILDISPATCHER_HXX
+#define INCLUDED_SW_SOURCE_UIBASE_INC_MAILDISPATCHER_HXX
+
+#include <com/sun/star/mail/XSmtpService.hpp>
+#include <com/sun/star/mail/XMailMessage.hpp>
+#include <osl/thread.hxx>
+#include <osl/conditn.hxx>
+#include <rtl/ref.hxx>
+#include <salhelper/simplereferenceobject.hxx>
+
+#include <list>
+#include <vector>
+
+#include <swdllapi.h>
+
+class IMailDispatcherListener;
+
+/**
+    A MailDispatcher should be used for sending a bunch a mail messages
+    asynchronously. Usually a client enqueues a number of mail messages
+    and then calls start to begin sending them. An instance of this class
+    must not be shared among different client threads. Instead each client
+    thread should create an own instance of this class.
+*/
+class SW_DLLPUBLIC MailDispatcher final : public salhelper::SimpleReferenceObject,
+                                          private ::osl::Thread
+{
+public:
+    // bringing operator new/delete into scope
+    using osl::Thread::operator new;
+    using osl::Thread::operator delete;
+    using osl::Thread::join;
+
+    /**
+        @param xSmtpService
+        [in] a reference to a mail server. A user must be
+        connected to the mail server otherwise errors occur
+        during the delivery of mail messages.
+
+        @throws css::uno::RuntimeException
+        on errors during construction of an instance of this class.
+    */
+    MailDispatcher(css::uno::Reference<css::mail::XSmtpService> xMailService);
+
+    /**
+        Shutdown the mail dispatcher. Every mail messages
+        not yet sent will be discarded.
+    */
+    virtual ~MailDispatcher() override;
+
+    /**
+        Enqueue a mail message for delivery. A client must
+        start the mail dispatcher in order to send the
+        enqueued mail messages.
+
+        @param xMailMessage
+        [in] a mail message that should be send.
+    */
+    void enqueueMailMessage(css::uno::Reference<css::mail::XMailMessage> const& xMailMessage);
+    /**
+        Dequeues a mail message.
+        This enables the caller to remove attachments when sending mails is to be cancelled.
+    */
+    css::uno::Reference<css::mail::XMailMessage> dequeueMailMessage();
+
+    /**
+        Start sending mail messages asynchronously. A client may register
+        a listener for mail dispatcher events. For every mail message sent
+        the notification will be sent. While handling such notification a
+        client may enqueue new mail messages. If there are no more mail
+        messages to send a respective notification is sent and the mail
+        dispatcher waits for more mail messages.
+
+        @precond not isStarted()
+    */
+    void start();
+
+    /**
+        Stop sending mail messages.
+
+        @precond isStarted()
+    */
+    void stop();
+
+    /**
+        Request shutdown of the mail dispatcher thread.
+        NOTE: You must call this method before you release
+        your last reference to this class otherwise the
+        mail dispatcher thread will never end.
+    */
+    void shutdown();
+
+    /**
+        Check whether the mail dispatcher is started or not.
+
+        @return
+        <TRUE/> if the sending thread is running.
+    */
+    bool isStarted() const { return m_bActive; }
+
+    /** returns if the thread is still running
+    */
+    using osl::Thread::isRunning;
+
+    /**
+     * returns if shutdown has already been called
+     */
+    bool isShutdownRequested() const { return m_bShutdownRequested; }
+
+    /**
+     * Register a listener for mail dispatcher events
+     */
+    void addListener(::rtl::Reference<IMailDispatcherListener> const& listener);
+
+private:
+    virtual void SAL_CALL run() override;
+    virtual void SAL_CALL onTerminated() override;
+
+    std::vector<::rtl::Reference<IMailDispatcherListener>> cloneListener();
+    void sendMailMessageNotifyListener(css::uno::Reference<css::mail::XMailMessage> const& message);
+
+    css::uno::Reference<css::mail::XSmtpService> m_xMailserver;
+    std::list<css::uno::Reference<css::mail::XMailMessage>> m_aXMessageList;
+    std::vector<::rtl::Reference<IMailDispatcherListener>> m_aListenerVector;
+    ::osl::Mutex m_aMessageContainerMutex;
+    ::osl::Mutex m_aListenerContainerMutex;
+    ::osl::Mutex m_aThreadStatusMutex;
+    ::osl::Condition m_aRunCondition;
+    ::osl::Condition m_aWakeupCondition;
+    ::rtl::Reference<MailDispatcher> m_xSelfReference;
+    bool m_bActive;
+    bool m_bShutdownRequested;
+};
+
+#endif // INCLUDED_SW_SOURCE_UIBASE_INC_MAILDISPATCHER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */