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Diffstat (limited to 'comphelper/inc/comphelper/make_shared_from_uno.hxx')
-rw-r--r-- | comphelper/inc/comphelper/make_shared_from_uno.hxx | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/comphelper/inc/comphelper/make_shared_from_uno.hxx b/comphelper/inc/comphelper/make_shared_from_uno.hxx new file mode 100644 index 000000000000..3acd4ec13dfe --- /dev/null +++ b/comphelper/inc/comphelper/make_shared_from_uno.hxx @@ -0,0 +1,75 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ +#if ! defined(INCLUDED_COMPHELPER_MAKE_SHARED_FROM_UNO_HXX) +#define INCLUDED_COMPHELPER_MAKE_SHARED_FROM_UNO_HXX + +#include "boost/shared_ptr.hpp" +#include <functional> + +namespace comphelper { + +/// @internal +namespace detail { +/// @internal +template <typename T> struct ReleaseFunc : ::std::unary_function<T *, void> { + void operator()( T * p ) const { p->release(); } +}; +} // namespace detail + +/** Makes a boost::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> + boost::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 (boost::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 ::boost::shared_ptr<T> make_shared_from_UNO( T * p ) +{ + p->acquire(); + return ::boost::shared_ptr<T>( p, detail::ReleaseFunc<T>() ); +} + +} // namespace comphelper + +#endif // ! defined(INCLUDED_COMPHELPER_MAKE_SHARED_FROM_UNO_HXX) + |