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51 lines
1.3 KiB
51 lines
1.3 KiB
// Copyright David Abrahams 2002. |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef INSTANCE_DWA200295_HPP |
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# define INSTANCE_DWA200295_HPP |
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# include <boost/python/detail/prefix.hpp> |
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# include <boost/type_traits/alignment_traits.hpp> |
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# include <cstddef> |
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namespace boost { namespace python |
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{ |
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struct BOOST_PYTHON_DECL_FORWARD instance_holder; |
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}} // namespace boost::python |
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namespace boost { namespace python { namespace objects { |
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// Each extension instance will be one of these |
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template <class Data = char> |
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struct instance |
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{ |
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PyObject_VAR_HEAD |
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PyObject* dict; |
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PyObject* weakrefs; |
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instance_holder* objects; |
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typedef typename type_with_alignment< |
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::boost::alignment_of<Data>::value |
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>::type align_t; |
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union |
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{ |
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align_t align; |
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char bytes[sizeof(Data)]; |
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} storage; |
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}; |
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template <class Data> |
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struct additional_instance_size |
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{ |
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typedef instance<Data> instance_data; |
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typedef instance<char> instance_char; |
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BOOST_STATIC_CONSTANT( |
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std::size_t, value = sizeof(instance_data) |
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- BOOST_PYTHON_OFFSETOF(instance_char,storage)); |
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}; |
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}}} // namespace boost::python::object |
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#endif // INSTANCE_DWA200295_HPP
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