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Object life support

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[SVN r12662]
This commit is contained in:
Dave Abrahams
2002-02-03 05:03:05 +00:00
parent 0a9d5f680f
commit 262396d48b
5 changed files with 137 additions and 7 deletions
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32
include/boost/python/return_internal_reference.hpp
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@@ -7,7 +7,10 @@
# define RETURN_INTERNAL_REFERENCE_DWA2002131_HPP
# include <boost/python/default_call_policies.hpp>
# include <boost/python/object/life_support.hpp>
# include <boost/type_traits/object_traits.hpp>
# include <boost/python/reference_existing_object.hpp>
# include <boost/python/to_python_indirect.hpp>
namespace boost { namespace python {
@@ -28,18 +31,39 @@ struct internal_reference_to_python_generator
{
typedef typename mpl::select_type<
!is_object<T>::value
, internal_reference_to_python<T>
, detail::return_internal_reference_requires_a_pointer_or_reference_return_type
, to_python_indirect<T, detail::make_reference_holder>
, detail::return_internal_reference_requires_a_pointer_or_reference_return_type<T>
>::type type;
};
};
template <std::size_t owner_arg, class Base = default_call_policies>
template <std::size_t owner_arg = 1, class Base = default_call_policies>
struct return_internal_reference : Base
{
typedef wrap_internal_reference<owner_arg> result_converter;
typedef reference_existing_object result_converter;
static PyObject* postcall(PyObject* args, PyObject* result);
};
template <std::size_t owner_arg, class Base>
PyObject* return_internal_reference<owner_arg,Base>::postcall(PyObject* args_, PyObject* result)
{
PyObject* patient = PyTuple_GetItem(args_, owner_arg - 1);
if (patient != 0) // Make sure the argument was in range.
{
result = Base::postcall(args_,result);
if (result != 0)
{
if (python::objects::make_nurse_and_patient(result, patient) == 0)
{
return result;
}
}
}
Py_XDECREF(result);
return 0;
}
}} // namespace boost::python
#endif // RETURN_INTERNAL_REFERENCE_DWA2002131_HPP