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// DEPRECATED in favor of adl_postconstruct and adl_predestruct with
// deconstruct<T>().
// A factory function for creating a shared_ptr that enhances the plain
// shared_ptr constructors by adding support for postconstructors
// and predestructors through the boost::signals2::postconstructible and
// boost::signals2::predestructible base classes.
//
// Copyright Frank Mori Hess 2007-2008.
//
// Use, modification and
// distribution is subject to the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_SIGNALS2_DECONSTRUCT_PTR_HPP
#define BOOST_SIGNALS2_DECONSTRUCT_PTR_HPP
#include <boost/assert.hpp>
#include <boost/checked_delete.hpp>
#include <boost/signals2/postconstructible.hpp>
#include <boost/signals2/predestructible.hpp>
#include <boost/shared_ptr.hpp>
namespace boost
{
namespace signals2
{
namespace detail
{
extern inline void do_postconstruct(const postconstructible *ptr)
{
postconstructible *nonconst_ptr = const_cast<postconstructible*>(ptr);
nonconst_ptr->postconstruct();
}
extern inline void do_postconstruct(...)
{
}
extern inline void do_predestruct(...)
{
}
extern inline void do_predestruct(const predestructible *ptr)
{
try
{
predestructible *nonconst_ptr = const_cast<predestructible*>(ptr);
nonconst_ptr->predestruct();
}
catch(...)
{
BOOST_ASSERT(false);
}
}
}
template<typename T> class predestructing_deleter
{
public:
void operator()(const T *ptr) const
{
detail::do_predestruct(ptr);
checked_delete(ptr);
}
};
template<typename T>
shared_ptr<T> deconstruct_ptr(T *ptr)
{
if(ptr == 0) return shared_ptr<T>(ptr);
shared_ptr<T> shared(ptr, boost::signals2::predestructing_deleter<T>());
detail::do_postconstruct(ptr);
return shared;
}
template<typename T, typename D>
shared_ptr<T> deconstruct_ptr(T *ptr, D deleter)
{
shared_ptr<T> shared(ptr, deleter);
if(ptr == 0) return shared;
detail::do_postconstruct(ptr);
return shared;
}
}
}
#endif // BOOST_SIGNALS2_DECONSTRUCT_PTR_HPP
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