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// Copyright 2016 Klemens Morgenstern, Antony Polukhin
//
// Distributed under 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)
// For more information, see http://www.boost.org
#ifndef BOOST_DLL_DETAIL_TYPE_INFO_HPP_
#define BOOST_DLL_DETAIL_TYPE_INFO_HPP_
#include <typeinfo>
#include <cstring>
namespace boost { namespace dll { namespace detail {
#if defined(BOOST_MSVC) || defined(BOOST_MSVC_VER)
#if defined ( _WIN64 )
template<typename Class, typename Lib, typename Storage>
const std::type_info& load_type_info(Lib & lib, Storage & storage)
{
struct RTTICompleteObjectLocator
{
boost::detail::winapi::DWORD_ signature; //always zero ?
boost::detail::winapi::DWORD_ offset; //offset of this vtable in the complete class
boost::detail::winapi::DWORD_ cdOffset; //constructor displacement offset
boost::detail::winapi::DWORD_ pTypeDescriptorOffset; //TypeDescriptor of the complete class
boost::detail::winapi::DWORD_ pClassDescriptorOffset; //describes inheritance hierarchy (ignored)
};
RTTICompleteObjectLocator** vtable_p = &lib.template get<RTTICompleteObjectLocator*>(storage.template get_vtable<Class>());
vtable_p--;
auto vtable = *vtable_p;
auto nat = reinterpret_cast<const char*>(lib.native());
nat += vtable->pTypeDescriptorOffset;
return *reinterpret_cast<const std::type_info*>(nat);
}
#else
template<typename Class, typename Lib, typename Storage>
const std::type_info& load_type_info(Lib & lib, Storage & storage)
{
struct RTTICompleteObjectLocator
{
boost::detail::winapi::DWORD_ signature; //always zero ?
boost::detail::winapi::DWORD_ offset; //offset of this vtable in the complete class
boost::detail::winapi::DWORD_ cdOffset; //constructor displacement offset
const std::type_info* pTypeDescriptor; //TypeDescriptor of the complete class
void* pClassDescriptor; //describes inheritance hierarchy (ignored)
};
RTTICompleteObjectLocator** vtable_p = &lib.template get<RTTICompleteObjectLocator*>(storage.template get_vtable<Class>());
vtable_p--;
auto vtable = *vtable_p;
return *vtable->pTypeDescriptor;
}
#endif //_WIN64
#else
template<typename Class, typename Lib, typename Storage>
const std::type_info& load_type_info(Lib & lib, Storage & storage)
{
return lib.template get<const std::type_info>(storage.template get_type_info<Class>());
}
#endif
}}}
#endif /* BOOST_DLL_DETAIL_TYPE_INFO_HPP_ */
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