c95d91ee35
tweak the templating to make it easier to declare a WeakReference that points to a subclass for a weak-capable class. Which lets us declare some fields with more specific types, and dump a lot of unnecessary casting. And make WeakBase be inherited from virtually, so we don't end up with weird states where two weak refernces could point to two different parts of the same object. Change-Id: I3213ea27e087038457b0761b5171c7bce96e71f3 Reviewed-on: https://gerrit.libreoffice.org/48650 Tested-by: Jenkins <ci@libreoffice.org> Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
149 lines
4.4 KiB
C++
149 lines
4.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_TOOLS_WEAKBASE_HXX
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#define INCLUDED_TOOLS_WEAKBASE_HXX
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#include <tools/weakbase.h>
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/// see weakbase.h for documentation
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namespace tools
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{
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template< class reference_type >
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inline WeakReference< reference_type >::WeakReference()
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{
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mpWeakConnection = new WeakConnection;
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}
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template< class reference_type >
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inline WeakReference< reference_type >::WeakReference( reference_type* pReference )
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{
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reset( pReference );
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}
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template< class reference_type >
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inline WeakReference< reference_type >::WeakReference( const WeakReference< reference_type >& rWeakRef )
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{
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mpWeakConnection = rWeakRef.mpWeakConnection;
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}
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template< class reference_type >
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inline WeakReference< reference_type >::WeakReference( WeakReference< reference_type >&& rWeakRef )
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{
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mpWeakConnection = std::move(rWeakRef.mpWeakConnection);
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}
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template< class reference_type >
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inline bool WeakReference< reference_type >::is() const
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{
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return mpWeakConnection->mpReference != nullptr;
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}
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template< class reference_type >
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inline reference_type * WeakReference< reference_type >::get() const
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{
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auto pWeakBase = mpWeakConnection->mpReference;
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auto pRet = dynamic_cast<reference_type *>(pWeakBase);
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assert((pWeakBase && pRet) || (!pWeakBase && !pRet));
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return pRet;
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}
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template< class reference_type >
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inline void WeakReference< reference_type >::reset( reference_type* pReference )
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{
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if( pReference )
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mpWeakConnection = pReference->getWeakConnection();
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else
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mpWeakConnection = new WeakConnection;
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}
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template< class reference_type >
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inline reference_type * WeakReference< reference_type >::operator->() const
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{
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return get();
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}
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template< class reference_type >
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inline bool WeakReference< reference_type >::operator==(const reference_type * pReferenceObject) const
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{
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return mpWeakConnection->mpReference == pReferenceObject;
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}
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template< class reference_type >
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inline bool WeakReference< reference_type >::operator==(const WeakReference<reference_type> & handle) const
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{
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return mpWeakConnection == handle.mpWeakConnection;
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}
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template< class reference_type >
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inline bool WeakReference< reference_type >::operator!=(const WeakReference<reference_type> & handle) const
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{
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return mpWeakConnection != handle.mpWeakConnection;
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}
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template< class reference_type >
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inline bool WeakReference< reference_type >::operator<(const WeakReference<reference_type> & handle) const
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{
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return mpWeakConnection->mpReference < handle.mpWeakConnection->mpReference;
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}
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template< class reference_type >
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inline bool WeakReference< reference_type >::operator>(const WeakReference<reference_type> & handle) const
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{
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return mpWeakConnection->mpReference > handle.mpWeakConnection->mpReference;
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}
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template< class reference_type >
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inline WeakReference<reference_type>& WeakReference<reference_type>::operator= (
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const WeakReference<reference_type>& rReference)
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{
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if (&rReference != this)
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mpWeakConnection = rReference.mpWeakConnection;
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return *this;
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}
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template< class reference_type >
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inline WeakReference<reference_type>& WeakReference<reference_type>::operator= (
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WeakReference<reference_type>&& rReference)
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{
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mpWeakConnection = std::move(rReference.mpWeakConnection);
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return *this;
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}
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inline void WeakBase::clearWeak()
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{
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if( mpWeakConnection.is() )
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mpWeakConnection->mpReference = nullptr;
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}
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inline WeakConnection* WeakBase::getWeakConnection()
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{
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if( !mpWeakConnection.is() )
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mpWeakConnection = new WeakConnection( this );
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return mpWeakConnection.get();
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}
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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