// Copyright (c) 2003 Daniel Wallin and Arvid Norberg

// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
// ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
// OR OTHER DEALINGS IN THE SOFTWARE.


#ifndef LUABIND_CLASS_REGISTRY_HPP_INCLUDED
#define LUABIND_CLASS_REGISTRY_HPP_INCLUDED

#include <luabind/config.hpp>
#include <luabind/open.hpp>
#include <luabind/typeid.hpp>

#include <map>

namespace luabind { namespace detail
{
    class class_rep;

    extern char classes_tag; // Not used in headers, thus no LUABIND_API.

    struct LUABIND_API class_registry
    {
        class_registry(lua_State* L);

        static class_registry* get_registry(lua_State* L);

        int cpp_instance() const { return m_instance_metatable; }
        int cpp_class() const { return m_cpp_class_metatable; }

        int lua_instance() const { return m_instance_metatable; }
        int lua_class() const { return m_lua_class_metatable; }
        int lua_function() const { return m_lua_function_metatable; }

        void add_class(type_id const& info, class_rep* crep);

        class_rep* find_class(type_id const& info) const;

        std::map<type_id, class_rep*> const& get_classes() const
        {
            return m_classes;
        }

    private:

        std::map<type_id, class_rep*> m_classes;

        // this is a lua reference that points to the lua table
        // that is to be used as meta table for all C++ class
        // instances. It is a kind of v-table.
        int m_instance_metatable;

        // this is a lua reference to the metatable to be used
        // for all classes defined in C++.
        int m_cpp_class_metatable;

        // this is a lua reference to the metatable to be used
        // for all classes defined in lua
        int m_lua_class_metatable;

        // this metatable only contains a destructor
        // for luabind::Detail::free_functions::function_rep
        int m_lua_function_metatable;

    };

}}

#endif // LUABIND_CLASS_REGISTRY_HPP_INCLUDED