boost/serialization/export.hpp
#ifndef BOOST_SERIALIZATION_EXPORT_HPP #define BOOST_SERIALIZATION_EXPORT_HPP // MS compatible compilers support #pragma once #if defined(_MSC_VER) && (_MSC_VER >= 1020) # pragma once #endif /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 // export.hpp: set traits of classes to be serialized // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . // 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. // (C) Copyright 2006 David Abrahams - http://www.boost.org. // implementation of class export functionality. This is an alternative to // "forward declaration" method to provoke instantiation of derived classes // that are to be serialized through pointers. #include <utility> #include <cstddef> // NULL #include <boost/config.hpp> #include <boost/static_assert.hpp> #include <boost/preprocessor/stringize.hpp> #include <boost/type_traits/is_polymorphic.hpp> #ifndef BOOST_SERIALIZATION_DEFAULT_TYPE_INFO #include <boost/serialization/extended_type_info_typeid.hpp> #endif #include <boost/serialization/static_warning.hpp> #include <boost/serialization/type_info_implementation.hpp> #include <boost/serialization/assume_abstract.hpp> #include <boost/serialization/force_include.hpp> #include <boost/serialization/singleton.hpp> #include <boost/archive/detail/register_archive.hpp> #include <boost/mpl/assert.hpp> #include <boost/mpl/and.hpp> #include <boost/mpl/not.hpp> #include <boost/mpl/bool.hpp> #include <iostream> namespace boost { namespace archive { namespace detail { class basic_pointer_iserializer; class basic_pointer_oserializer; template<class Archive, class T> class pointer_iserializer; template<class Archive, class T> class pointer_oserializer; template <class Archive, class Serializable> struct export_impl { static const basic_pointer_iserializer & enable_load(mpl::true_){ return boost::serialization::singleton< pointer_iserializer<Archive, Serializable> >::get_const_instance(); } static const basic_pointer_oserializer & enable_save(mpl::true_){ return boost::serialization::singleton< pointer_oserializer<Archive, Serializable> >::get_const_instance(); } inline static void enable_load(mpl::false_) {} inline static void enable_save(mpl::false_) {} }; // On many platforms, naming a specialization of this template is // enough to cause its argument to be instantiated. template <void(*)()> struct instantiate_function {}; template <class Archive, class Serializable> struct ptr_serialization_support { # if defined(BOOST_MSVC) virtual BOOST_DLLEXPORT void instantiate() BOOST_USED; # elif defined(__BORLANDC__) static BOOST_DLLEXPORT void instantiate() BOOST_USED; enum { x = sizeof(instantiate(),3) }; # else static BOOST_DLLEXPORT void instantiate() BOOST_USED; typedef instantiate_function< &ptr_serialization_support::instantiate > x; # endif }; template <class Archive, class Serializable> BOOST_DLLEXPORT void ptr_serialization_support<Archive,Serializable>::instantiate() { export_impl<Archive,Serializable>::enable_save( #if ! defined(__BORLANDC__) BOOST_DEDUCED_TYPENAME #endif Archive::is_saving() ); export_impl<Archive,Serializable>::enable_load( #if ! defined(__BORLANDC__) BOOST_DEDUCED_TYPENAME #endif Archive::is_loading() ); } template<class T> struct guid_initializer { const guid_initializer & export_guid(char const* /* key */, mpl::false_){ // generates the statically-initialized objects whose constructors // register the information allowing serialization of T objects // through pointers to their base classes. instantiate_ptr_serialization((T*)0, 0, adl_tag()); return *this; } const guid_initializer & export_guid(char const* /*key*/, mpl::true_){ return *this; } const guid_initializer & export_guid(char const* key){ BOOST_STATIC_WARNING(boost::is_polymorphic<T>::value); assert(NULL != key); boost::serialization::singleton< BOOST_DEDUCED_TYPENAME boost::serialization::type_info_implementation<T>::type >::get_mutable_instance().key_register(key); // note: exporting an abstract base class will have no effect // and cannot be used to instantitiate serialization code // (one might be using this in a DLL to instantiate code) //BOOST_STATIC_WARNING(! boost::serialization::is_abstract<T>::value); return export_guid(key, boost::serialization::is_abstract<T>()); } }; } // namespace detail } // namespace archive } // namespace boost #define BOOST_CLASS_EXPORT_GUID(T, K) \ namespace \ { \ ::boost::archive::detail::guid_initializer< T > const & \ BOOST_PP_CAT(boost_serialization_guid_initializer_, __LINE__) \ = ::boost::serialization::singleton< \ ::boost::archive::detail::guid_initializer< T > \ >::get_mutable_instance().export_guid(K); \ } // the following is solely to support de-serialization of pointers serialized // under 1.32 #define BOOST_CLASS_EXPORT_GUID_1(T, K) \ namespace \ { \ ::boost::archive::detail::guid_initializer< T > const & \ BOOST_PP_CAT( \ boost_serialization_guid_initializer_, \ BOOST_PP_CAT(__LINE__,_1) \ ) = ::boost::serialization::singleton< \ ::boost::archive::detail::guid_initializer< T > \ >::get_mutable_instance().export_guid(K); \ } #if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3205)) // CodeWarrior fails to construct static members of class templates // when they are instantiated from within templates, so on that // compiler we ask users to specifically register base/derived class // relationships for exported classes. On all other compilers, use of // this macro is entirely optional. # define BOOST_SERIALIZATION_MWERKS_BASE_AND_DERIVED(Base,Derived) \ namespace \ { \ int BOOST_PP_CAT(boost_serialization_mwerks_init_, __LINE__) = \ (::boost::archive::detail::instantiate_ptr_serialization((Derived*)0,0), 3); \ int BOOST_PP_CAT(boost_serialization_mwerks_init2_, __LINE__) = ( \ ::boost::serialization::void_cast_register((Derived*)0,(Base*)0) \ , 3); \ } #else # define BOOST_SERIALIZATION_MWERKS_BASE_AND_DERIVED(Base,Derived) #endif // check for unnecessary export. T isn't polymorphic so there is no // need to export it. #define BOOST_CLASS_EXPORT_CHECK(T) \ BOOST_STATIC_WARNING( \ boost::is_polymorphic<U>::value \ ); \ /**/ // the default exportable class identifier is the class name // the default list of archives types for which code id generated // are the originally included with this serialization system #define BOOST_CLASS_EXPORT(T) \ BOOST_CLASS_EXPORT_GUID( \ T, \ BOOST_PP_STRINGIZE(T) \ ) \ /**/ #endif // BOOST_SERIALIZATION_EXPORT_HPP