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90 lines
2.5 KiB
C++
90 lines
2.5 KiB
C++
// Copyright (c) 2004 Daniel Wallin
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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// ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
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// OR OTHER DEALINGS IN THE SOFTWARE.
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#ifndef CLASS_CACHE_040218_HPP
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#define CLASS_CACHE_040218_HPP
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#include <luabind/prefix.hpp>
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#include <boost/type_traits/add_reference.hpp>
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#include <boost/type_traits/add_const.hpp>
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namespace luabind { namespace detail {
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#ifdef LUABIND_NOT_THREADSAFE
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class class_rep;
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template<class T>
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struct class_cache_impl
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{
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static lua_State* state;
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static class_rep* class_;
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};
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template<class T>
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lua_State* class_cache_impl<T>::state = 0;
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template<class T>
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class_rep* class_cache_impl<T>::class_ = 0;
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template<class T>
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struct class_cache
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: class_cache_impl<
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typename boost::add_reference<
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typename boost::add_const<
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T
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>::type
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>::type
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>
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{
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};
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template<class T>
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class_rep* get_class_rep(lua_State* L, void(*)(T*) = 0)
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{
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if (class_cache<T>::state != L)
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{
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class_cache<T>::state = L;
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class_registry* registry = class_registry::get_registry(L);
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class_cache<T>::class_ = registry->find_class(typeid(T));
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}
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return class_cache<T>::class_;
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}
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#else
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template<class T>
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class_rep* get_class_rep(lua_State* L, void(*)(T*) = 0)
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{
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class_registry* registry = class_registry::get_registry(L);
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return registry->find_class(typeid(T));
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}
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#endif
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}} // namespace luabind::detail
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#endif // CLASS_CACHE_040218_HPP
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