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