Added boost header

test/external/boost/python/object/instance.hpp

@@ -0,0 +1,51 @@
+// Copyright David Abrahams 2002.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+#ifndef INSTANCE_DWA200295_HPP
+# define INSTANCE_DWA200295_HPP
+
+# include <boost/python/detail/prefix.hpp>
+# include <boost/type_traits/alignment_traits.hpp>
+# include <cstddef>
+
+namespace boost { namespace python
+{
+  struct BOOST_PYTHON_DECL_FORWARD instance_holder;
+}} // namespace boost::python
+
+namespace boost { namespace python { namespace objects { 
+
+// Each extension instance will be one of these
+template <class Data = char>
+struct instance
+{
+    PyObject_VAR_HEAD
+    PyObject* dict;
+    PyObject* weakrefs; 
+    instance_holder* objects;
+
+    typedef typename type_with_alignment<
+        ::boost::alignment_of<Data>::value
+    >::type align_t;
+          
+    union
+    {
+        align_t align;
+        char bytes[sizeof(Data)];
+    } storage;
+};
+
+template <class Data>
+struct additional_instance_size
+{
+    typedef instance<Data> instance_data;
+    typedef instance<char> instance_char;
+    BOOST_STATIC_CONSTANT(
+        std::size_t, value = sizeof(instance_data)
+                           - BOOST_PYTHON_OFFSETOF(instance_char,storage));
+};
+
+}}} // namespace boost::python::object
+
+#endif // INSTANCE_DWA200295_HPP