forked from amazingfate/loongoffice
2633d5f97f
See tdf#42949 for motivation Change-Id: Ifc253bf800bb1468b5774663a93f4fb30bec81d3 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/113657 Tested-by: Jenkins Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
132 lines
3.8 KiB
C++
132 lines
3.8 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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/*
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* This file is part of LibreOffice published API.
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*/
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#pragma once
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#include <sal/config.h>
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#include <com/sun/star/uno/Reference.hxx>
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#include <com/sun/star/uno/XInterface.hpp>
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#include <cppuhelper/weakref.hxx>
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#include <cppuhelper/weak.hxx>
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#include <rtl/ref.hxx>
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namespace cppu
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{
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class OWeakObject;
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}
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namespace unotools
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{
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/** The WeakReference<> holds a weak reference to an object.
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That object must implement the css::uno::XWeak interface.
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The WeakReference itself is *not* thread safe, just as
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Reference itself isn't, but the implementation of the listeners etc.
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behind it *is* thread-safe, so multiple threads can have their own
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WeakReferences to the same XWeak object.
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@tparam interface_type type of interface
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*/
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template <class interface_type>
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class SAL_WARN_UNUSED WeakReference : public com::sun::star::uno::WeakReferenceHelper
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{
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public:
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/** Default ctor. Creates an empty weak reference.
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*/
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WeakReference()
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: WeakReferenceHelper()
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{
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}
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/** Copy ctor. Initialize this reference with a hard reference.
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@param rRef another hard ref
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*/
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WeakReference(const rtl::Reference<interface_type>& rRef)
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: WeakReferenceHelper(rRef)
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{
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}
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/** Copy ctor. Initialize this reference with a hard reference.
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@param rRef another hard ref
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*/
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WeakReference(interface_type& rRef)
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: WeakReferenceHelper(&rRef)
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{
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}
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/** Copy ctor. Initialize this reference with a hard reference.
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@param rRef another hard ref
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*/
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WeakReference(interface_type* pRef)
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: WeakReferenceHelper(static_cast<cppu::OWeakObject*>(pRef))
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{
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}
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/** Releases this reference and takes over hard reference xInt.
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If the implementation behind xInt does not support XWeak
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or XInt is null, then this reference is null.
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@param xInt another hard reference
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*/
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WeakReference& operator=(const rtl::Reference<interface_type>& xInt)
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{
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WeakReferenceHelper::operator=(xInt);
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return *this;
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}
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WeakReference& operator=(rtl::Reference<interface_type>&& xInt)
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{
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WeakReferenceHelper::operator=(std::move(xInt));
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return *this;
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}
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WeakReference& operator=(interface_type* pInt)
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{
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WeakReferenceHelper::operator=(static_cast<::cppu::OWeakObject*>(pInt));
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return *this;
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}
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/** Gets a hard reference to the object.
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@return hard reference or null, if the weakly referenced interface has gone
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*/
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rtl::Reference<interface_type> SAL_CALL get() const
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{
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css::uno::Reference<css::uno::XInterface> xInterface = WeakReferenceHelper::get();
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return dynamic_cast<interface_type*>(xInterface.get());
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}
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/** Gets a hard reference to the object.
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@return hard reference or null, if the weakly referenced interface has gone
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*/
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operator ::rtl::Reference<interface_type>() const { return get(); }
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};
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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