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/**************************************************************
*
* 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
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the 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)
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