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134 lines
3.5 KiB
C++
134 lines
3.5 KiB
C++
// Copyright (c) 2003 Daniel Wallin and Arvid Norberg
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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 LUABIND_OBJECT_REP_HPP_INCLUDED
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#define LUABIND_OBJECT_REP_HPP_INCLUDED
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#include <boost/aligned_storage.hpp>
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#include <luabind/config.hpp>
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#include <luabind/detail/instance_holder.hpp>
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#include <luabind/detail/ref.hpp>
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#include <cstdlib>
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namespace luabind { namespace detail
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{
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class class_rep;
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void finalize(lua_State* L, class_rep* crep);
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// this class is allocated inside lua for each pointer.
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// it contains the actual c++ object-pointer.
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// it also tells if it is const or not.
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class LUABIND_API object_rep
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{
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public:
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object_rep(instance_holder* instance, class_rep* crep);
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~object_rep();
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const class_rep* crep() const { return m_classrep; }
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class_rep* crep() { return m_classrep; }
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void set_instance(instance_holder* instance) { m_instance = instance; }
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void add_dependency(lua_State* L, int index);
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void release_dependency_refs(lua_State* L);
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std::pair<void*, int> get_instance(class_id target) const
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{
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if (m_instance == 0)
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return std::pair<void*, int>((void*)0, -1);
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return m_instance->get(target);
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}
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bool is_const() const
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{
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return m_instance && m_instance->pointee_const();
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}
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void release()
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{
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if (m_instance)
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m_instance->release();
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}
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void* allocate(std::size_t size)
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{
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if (size <= 32)
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return &m_instance_buffer;
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return std::malloc(size);
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}
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void deallocate(void* storage)
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{
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if (storage == &m_instance_buffer)
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return;
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std::free(storage);
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}
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private:
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object_rep(object_rep const&)
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{}
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void operator=(object_rep const&)
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{}
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instance_holder* m_instance;
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boost::aligned_storage<32> m_instance_buffer;
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class_rep* m_classrep; // the class information about this object's type
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std::size_t m_dependency_cnt; // counts dependencies
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};
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template<class T>
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struct delete_s
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{
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static void apply(void* ptr)
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{
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delete static_cast<T*>(ptr);
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}
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};
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template<class T>
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struct destruct_only_s
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{
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static void apply(void* ptr)
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{
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// Removes unreferenced formal parameter warning on VC7.
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(void)ptr;
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#ifndef NDEBUG
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int completeness_check[sizeof(T)];
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(void)completeness_check;
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#endif
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static_cast<T*>(ptr)->~T();
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}
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};
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LUABIND_API object_rep* get_instance(lua_State* L, int index);
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LUABIND_API void push_instance_metatable(lua_State* L);
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LUABIND_API object_rep* push_new_instance(lua_State* L, class_rep* cls);
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}}
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#endif // LUABIND_OBJECT_REP_HPP_INCLUDED
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