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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_DBACCESS_ASYNCRONOUSLINK_HXX
+#define INCLUDED_DBACCESS_ASYNCRONOUSLINK_HXX
+
+#include <osl/mutex.hxx>
+#include <tools/link.hxx>
+
+struct ImplSVEvent;
+
+namespace dbaui
+{
+
+ // a helper for multi-threaded handling of async events
+
+ /** handles asynchronous links which may be called in multi-threaded environments
+ If you use an instance of this class as member of your own class, it will handle
+ several crucial points for you (for instance the case that somebody posts the
+ event while another thread tries to delete this event in the _destructor_ of the
+ class).
+ */
+ class OAsynchronousLink final
+ {
+ Link<void*,void> m_aHandler;
+ ::osl::Mutex m_aEventSafety;
+ ::osl::Mutex m_aDestructionSafety;
+ ImplSVEvent * m_nEventId;
+ DECL_LINK(OnAsyncCall, void*, void);
+
+ public:
+ /** constructs the object
+ @param _rHandler The link to be called asynchronously
+ */
+ OAsynchronousLink( const Link<void*,void>& _rHandler );
+ ~OAsynchronousLink();
+
+ bool IsRunning() const { return m_nEventId != nullptr; }
+
+ void Call( void* _pArgument = nullptr );
+ void CancelCall();
+ };
+}
+#endif // INCLUDED_DBACCESS_ASYNCRONOUSLINK_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */