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Diffstat (limited to '')
-rw-r--r-- | include/dbaccess/AsynchronousLink.hxx | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/include/dbaccess/AsynchronousLink.hxx b/include/dbaccess/AsynchronousLink.hxx new file mode 100644 index 0000000000..22c40dc5b7 --- /dev/null +++ b/include/dbaccess/AsynchronousLink.hxx @@ -0,0 +1,60 @@ +/* -*- 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 <mutex> +#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; + std::mutex m_aEventSafety; + std::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(); + }; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |