1 /* Copyright 2006-2020 Joaquin M Lopez Munoz. 2 * Distributed under the Boost Software License, Version 1.0. 3 * (See accompanying file LICENSE_1_0.txt or copy at 4 * http://www.boost.org/LICENSE_1_0.txt) 5 * 6 * See http://www.boost.org/libs/flyweight for library home page. 7 */ 8 9 #ifndef BOOST_FLYWEIGHT_DETAIL_ARCHIVE_CONSTRUCTED_HPP 10 #define BOOST_FLYWEIGHT_DETAIL_ARCHIVE_CONSTRUCTED_HPP 11 12 #if defined(_MSC_VER)&&(_MSC_VER>=1200) 13 #pragma once 14 #endif 15 16 #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ 17 #include <boost/core/no_exceptions_support.hpp> 18 #include <boost/noncopyable.hpp> 19 #include <boost/serialization/serialization.hpp> 20 #include <boost/type_traits/aligned_storage.hpp> 21 #include <boost/type_traits/alignment_of.hpp> 22 23 namespace boost{ 24 25 namespace flyweights{ 26 27 namespace detail{ 28 29 /* constructs a stack-based object from a serialization archive */ 30 31 template<typename T> 32 struct archive_constructed:private noncopyable 33 { 34 template<class Archive> archive_constructedboost::flyweights::detail::archive_constructed35 archive_constructed(Archive& ar,const unsigned int version) 36 { 37 serialization::load_construct_data_adl(ar,&get(),version); 38 BOOST_TRY{ 39 ar>>get(); 40 } 41 BOOST_CATCH(...){ 42 (&get())->~T(); 43 BOOST_RETHROW; 44 } 45 BOOST_CATCH_END 46 } 47 48 template<class Archive> archive_constructedboost::flyweights::detail::archive_constructed49 archive_constructed(const char* name,Archive& ar,const unsigned int version) 50 { 51 serialization::load_construct_data_adl(ar,&get(),version); 52 BOOST_TRY{ 53 ar>>serialization::make_nvp(name,get()); 54 } 55 BOOST_CATCH(...){ 56 (&get())->~T(); 57 BOOST_RETHROW; 58 } 59 BOOST_CATCH_END 60 } 61 ~archive_constructedboost::flyweights::detail::archive_constructed62 ~archive_constructed() 63 { 64 (&get())->~T(); 65 } 66 getboost::flyweights::detail::archive_constructed67 T& get(){return *static_cast<T*>(static_cast<void*>(&space));} 68 69 private: 70 typename aligned_storage<sizeof(T),alignment_of<T>::value>::type space; 71 }; 72 73 } /* namespace flyweights::detail */ 74 75 } /* namespace flyweights */ 76 77 } /* namespace boost */ 78 79 #endif 80