Chris@101: /* Copyright 2003-2013 Joaquin M Lopez Munoz.
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  * (See accompanying file LICENSE_1_0.txt or copy at
Chris@16:  * http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  *
Chris@16:  * See http://www.boost.org/libs/multi_index for library home page.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_MULTI_INDEX_DETAIL_INDEX_NODE_BASE_HPP
Chris@16: #define BOOST_MULTI_INDEX_DETAIL_INDEX_NODE_BASE_HPP
Chris@16: 
Chris@101: #if defined(_MSC_VER)
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
Chris@16: #include <boost/type_traits/aligned_storage.hpp>
Chris@16: #include <boost/type_traits/alignment_of.hpp> 
Chris@16: 
Chris@16: #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
Chris@16: #include <boost/archive/archive_exception.hpp>
Chris@16: #include <boost/serialization/access.hpp>
Chris@16: #include <boost/throw_exception.hpp> 
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost{
Chris@16: 
Chris@16: namespace multi_index{
Chris@16: 
Chris@16: namespace detail{
Chris@16: 
Chris@16: /* index_node_base tops the node hierarchy of multi_index_container. It holds
Chris@16:  * the value of the element contained.
Chris@16:  */
Chris@16: 
Chris@16: template<typename Value>
Chris@16: struct pod_value_holder
Chris@16: {
Chris@16:   typename aligned_storage<
Chris@16:     sizeof(Value),
Chris@16:     alignment_of<Value>::value
Chris@16:   >::type                      space;
Chris@16: };
Chris@16: 
Chris@16: template<typename Value,typename Allocator>
Chris@16: struct index_node_base:private pod_value_holder<Value>
Chris@16: {
Chris@16:   typedef index_node_base base_type; /* used for serialization purposes */
Chris@16:   typedef Value           value_type;
Chris@16:   typedef Allocator       allocator_type;
Chris@16: 
Chris@16:   value_type& value()
Chris@16:   {
Chris@16:     return *static_cast<value_type*>(
Chris@16:       static_cast<void*>(&this->space));
Chris@16:   }
Chris@16: 
Chris@16:   const value_type& value()const
Chris@16:   {
Chris@16:     return *static_cast<const value_type*>(
Chris@16:       static_cast<const void*>(&this->space));
Chris@16:   }
Chris@16: 
Chris@16:   static index_node_base* from_value(const value_type* p)
Chris@16:   {
Chris@16:     return static_cast<index_node_base *>(
Chris@16:       reinterpret_cast<pod_value_holder<Value>*>( /* std 9.2.17 */
Chris@16:         const_cast<value_type*>(p))); 
Chris@16:   }
Chris@16: 
Chris@16: private:
Chris@16: #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
Chris@16:   friend class boost::serialization::access;
Chris@16:   
Chris@16:   /* nodes do not emit any kind of serialization info. They are
Chris@16:    * fed to Boost.Serialization so that pointers to nodes are
Chris@16:    * tracked correctly.
Chris@16:    */
Chris@16: 
Chris@16:   template<class Archive>
Chris@16:   void serialize(Archive&,const unsigned int)
Chris@16:   {
Chris@16:   }
Chris@16: #endif
Chris@16: };
Chris@16: 
Chris@16: template<typename Node,typename Value>
Chris@101: Node* node_from_value(const Value* p)
Chris@16: {
Chris@16:   typedef typename Node::allocator_type allocator_type;
Chris@16:   return static_cast<Node*>(
Chris@16:     index_node_base<Value,allocator_type>::from_value(p));
Chris@16: }
Chris@16: 
Chris@16: } /* namespace multi_index::detail */
Chris@16: 
Chris@16: } /* namespace multi_index */
Chris@16: 
Chris@16: #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
Chris@16: /* Index nodes never get constructed directly by Boost.Serialization,
Chris@16:  * as archives are always fed pointers to previously existent
Chris@16:  * nodes. So, if this is called it means we are dealing with a
Chris@16:  * somehow invalid archive.
Chris@16:  */
Chris@16: 
Chris@16: #if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
Chris@16: namespace serialization{
Chris@16: #else
Chris@16: namespace multi_index{
Chris@16: namespace detail{
Chris@16: #endif
Chris@16: 
Chris@16: template<class Archive,typename Value,typename Allocator>
Chris@16: inline void load_construct_data(
Chris@16:   Archive&,boost::multi_index::detail::index_node_base<Value,Allocator>*,
Chris@16:   const unsigned int)
Chris@16: {
Chris@16:   throw_exception(
Chris@16:     archive::archive_exception(archive::archive_exception::other_exception));
Chris@16: }
Chris@16: 
Chris@16: #if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
Chris@16: } /* namespace serialization */
Chris@16: #else
Chris@16: } /* namespace multi_index::detail */
Chris@16: } /* namespace multi_index */
Chris@16: #endif
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: } /* namespace boost */
Chris@16: 
Chris@16: #endif