2019-10-13 00:53:31 -07:00

90 lines
2.5 KiB
C++

// Copyright (c) 2004 Daniel Wallin
// 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 CLASS_CACHE_040218_HPP
#define CLASS_CACHE_040218_HPP
#include <luabind/prefix.hpp>
#include <boost/type_traits/add_reference.hpp>
#include <boost/type_traits/add_const.hpp>
namespace luabind { namespace detail {
#ifdef LUABIND_NOT_THREADSAFE
class class_rep;
template<class T>
struct class_cache_impl
{
static lua_State* state;
static class_rep* class_;
};
template<class T>
lua_State* class_cache_impl<T>::state = 0;
template<class T>
class_rep* class_cache_impl<T>::class_ = 0;
template<class T>
struct class_cache
: class_cache_impl<
typename boost::add_reference<
typename boost::add_const<
T
>::type
>::type
>
{
};
template<class T>
class_rep* get_class_rep(lua_State* L, void(*)(T*) = 0)
{
if (class_cache<T>::state != L)
{
class_cache<T>::state = L;
class_registry* registry = class_registry::get_registry(L);
class_cache<T>::class_ = registry->find_class(typeid(T));
}
return class_cache<T>::class_;
}
#else
template<class T>
class_rep* get_class_rep(lua_State* L, void(*)(T*) = 0)
{
class_registry* registry = class_registry::get_registry(L);
return registry->find_class(typeid(T));
}
#endif
}} // namespace luabind::detail
#endif // CLASS_CACHE_040218_HPP