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#ifndef BOOST_SERIALIZATION_SHARED_PTR_HELPER_HPP
#define BOOST_SERIALIZATION_SHARED_PTR_HELPER_HPP
// MS compatible compilers support #pragma once
#if defined(_MSC_VER)
# pragma once
#endif
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// shared_ptr_helper.hpp: serialization for boost shared pointern
// (C) Copyright 2004-2009 Robert Ramey, Martin Ecker and Takatoshi Kondo
// 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)
// See http://www.boost.org for updates, documentation, and revision history.
#include <map>
#include <list>
#include <utility>
#include <cstddef> // NULL
#include <boost/config.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/type_traits/is_polymorphic.hpp>
#include <boost/mpl/if.hpp>
#include <boost/serialization/singleton.hpp>
#include <boost/serialization/extended_type_info.hpp>
#include <boost/serialization/throw_exception.hpp>
#include <boost/serialization/type_info_implementation.hpp>
#include <boost/archive/archive_exception.hpp>
#include <boost/archive/detail/decl.hpp>
#include <boost/archive/detail/abi_prefix.hpp> // must be the last headern
namespace boost_132 {
template<class T> class shared_ptr;
}
namespace boost {
namespace serialization {
#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
template<class Archive, template<class U> class SPT >
void load(
Archive & ar,
SPT< class U > &t,
const unsigned int file_version
);
#endif
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// a common class for holding various types of shared pointers
template<template<class T> class SPT>
class shared_ptr_helper {
typedef std::map<
const void *, // address of object
SPT<const void> // address shared ptr to single instance
> object_shared_pointer_map;
// list of shared_pointers create accessable by raw pointer. This
// is used to "match up" shared pointers loaded at different
// points in the archive. Note, we delay construction until
// it is actually used since this is by default included as
// a "mix-in" even if shared_ptr isn't used.
object_shared_pointer_map * m_o_sp;
struct null_deleter {
void operator()(void const *) const {}
};
#if defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) \
|| defined(BOOST_MSVC) \
|| defined(__SUNPRO_CC)
public:
#else
template<class Archive, class U>
friend void boost::serialization::load(
Archive & ar,
SPT< U > &t,
const unsigned int file_version
);
#endif
#ifdef BOOST_SERIALIZATION_SHARED_PTR_132_HPP
// list of loaded pointers. This is used to be sure that the pointers
// stay around long enough to be "matched" with other pointers loaded
// by the same archive. These are created with a "null_deleter" so that
// when this list is destroyed - the underlaying raw pointers are not
// destroyed. This has to be done because the pointers are also held by
// new system which is disjoint from this set. This is implemented
// by a change in load_construct_data below. It makes this file suitable
// only for loading pointers into a 1.33 or later boost system.
std::list<boost_132::shared_ptr<const void> > * m_pointers_132;
BOOST_ARCHIVE_DECL void
append(const boost_132::shared_ptr<const void> & t){
if(NULL == m_pointers_132)
m_pointers_132 = new std::list<boost_132::shared_ptr<const void> >;
m_pointers_132->push_back(t);
}
#endif
struct non_polymorphic {
template<class U>
static const boost::serialization::extended_type_info *
get_object_type(U & ){
return & boost::serialization::singleton<
typename
boost::serialization::type_info_implementation< U >::type
>::get_const_instance();
}
};
struct polymorphic {
template<class U>
static const boost::serialization::extended_type_info *
get_object_type(U & u){
return boost::serialization::singleton<
typename
boost::serialization::type_info_implementation< U >::type
>::get_const_instance().get_derived_extended_type_info(u);
}
};
public:
template<class T>
void reset(SPT< T > & s, T * t){
if(NULL == t){
s.reset();
return;
}
const boost::serialization::extended_type_info * this_type
= & boost::serialization::type_info_implementation< T >::type
::get_const_instance();
// get pointer to the most derived object's eti. This is effectively
// the object type identifer
typedef typename mpl::if_<
is_polymorphic< T >,
polymorphic,
non_polymorphic
>::type type;
const boost::serialization::extended_type_info * true_type
= type::get_object_type(*t);
// note:if this exception is thrown, be sure that derived pointern
// is either registered or exported.
if(NULL == true_type)
boost::serialization::throw_exception(
boost::archive::archive_exception(
boost::archive::archive_exception::unregistered_class,
this_type->get_debug_info()
)
);
// get void pointer to the most derived type
// this uniquely identifies the object referred to
// oid = "object identifier"
const void * oid = void_downcast(
*true_type,
*this_type,
t
);
if(NULL == oid)
boost::serialization::throw_exception(
boost::archive::archive_exception(
boost::archive::archive_exception::unregistered_cast,
true_type->get_debug_info(),
this_type->get_debug_info()
)
);
// make tracking array if necessary
if(NULL == m_o_sp)
m_o_sp = new object_shared_pointer_map;
typename object_shared_pointer_map::iterator i = m_o_sp->find(oid);
// if it's a new object
if(i == m_o_sp->end()){
s.reset(t);
std::pair<typename object_shared_pointer_map::iterator, bool> result;
result = m_o_sp->insert(std::make_pair(oid, s));
BOOST_ASSERT(result.second);
}
// if the object has already been seen
else{
s = SPT<T>(i->second, t);
}
}
shared_ptr_helper() :
m_o_sp(NULL)
#ifdef BOOST_SERIALIZATION_SHARED_PTR_132_HPP
, m_pointers_132(NULL)
#endif
{}
virtual ~shared_ptr_helper(){
if(NULL != m_o_sp)
delete m_o_sp;
#ifdef BOOST_SERIALIZATION_SHARED_PTR_132_HPP
if(NULL != m_pointers_132)
delete m_pointers_132;
#endif
}
};
} // namespace serialization
} // namespace boost
#include <boost/archive/detail/abi_suffix.hpp> // pops abi_suffix.hpp pragmas
#endif // BOOST_SERIALIZATION_SHARED_PTR_HELPER_HPP
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