68 lines
2.3 KiB
C++
68 lines
2.3 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_COMPHELPER_MAKE_SHARED_FROM_UNO_HXX
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#define INCLUDED_COMPHELPER_MAKE_SHARED_FROM_UNO_HXX
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#include <memory>
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namespace comphelper
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{
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/// @internal
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namespace detail
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{
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/// @internal
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template <typename T> struct ReleaseFunc
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{
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void operator()(T* p) const { p->release(); }
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};
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} // namespace detail
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/** Makes a std::shared_ptr from a ref-counted UNO object pointer.
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This makes sense if the object is used via UNO (implementing some X
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interface) and also internally using its implementation class, e.g.
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<pre>
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std::shared_ptr<MyUnoImpl> const ptr(
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comphelper::make_shared_from_UNO( new MyUnoImpl ) );
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...
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xUno->callingUno( uno::Reference<XSomeInterface>( ptr.get() ) );
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...
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takeSharedPtr( ptr );
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...
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</pre>
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@attention The shared_ptr operates on a separate reference counter, so
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weak pointers (std::weak_ptr) are invalidated when the last
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shared_ptr is destroyed, although the UNO object may still be
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alive.
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@param p object pointer
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@return shared_ptr to object
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*/
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template <typename T> inline std::shared_ptr<T> make_shared_from_UNO(T* p)
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{
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p->acquire();
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return std::shared_ptr<T>(p, detail::ReleaseFunc<T>());
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}
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} // namespace comphelper
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#endif // ! defined(INCLUDED_COMPHELPER_MAKE_SHARED_FROM_UNO_HXX)
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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