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63 lines
2.0 KiB
63 lines
2.0 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 SHARED_PTR_FROM_PYTHON_DWA20021130_HPP |
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# define SHARED_PTR_FROM_PYTHON_DWA20021130_HPP |
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# include <boost/python/handle.hpp> |
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# include <boost/python/converter/shared_ptr_deleter.hpp> |
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# include <boost/python/converter/from_python.hpp> |
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# include <boost/python/converter/rvalue_from_python_data.hpp> |
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# include <boost/python/converter/registered.hpp> |
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#ifndef BOOST_PYTHON_NO_PY_SIGNATURES |
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# include <boost/python/converter/pytype_function.hpp> |
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#endif |
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# include <boost/shared_ptr.hpp> |
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namespace boost { namespace python { namespace converter { |
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template <class T> |
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struct shared_ptr_from_python |
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{ |
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shared_ptr_from_python() |
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{ |
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converter::registry::insert(&convertible, &construct, type_id<shared_ptr<T> >() |
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#ifndef BOOST_PYTHON_NO_PY_SIGNATURES |
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, &converter::expected_from_python_type_direct<T>::get_pytype |
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#endif |
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); |
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} |
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private: |
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static void* convertible(PyObject* p) |
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{ |
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if (p == Py_None) |
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return p; |
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return converter::get_lvalue_from_python(p, registered<T>::converters); |
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} |
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static void construct(PyObject* source, rvalue_from_python_stage1_data* data) |
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{ |
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void* const storage = ((converter::rvalue_from_python_storage<shared_ptr<T> >*)data)->storage.bytes; |
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// Deal with the "None" case. |
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if (data->convertible == source) |
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new (storage) shared_ptr<T>(); |
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else |
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{ |
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boost::shared_ptr<void> hold_convertible_ref_count( |
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(void*)0, shared_ptr_deleter(handle<>(borrowed(source))) ); |
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// use aliasing constructor |
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new (storage) shared_ptr<T>( |
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hold_convertible_ref_count, |
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static_cast<T*>(data->convertible)); |
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} |
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data->convertible = storage; |
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} |
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}; |
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}}} // namespace boost::python::converter |
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#endif // SHARED_PTR_FROM_PYTHON_DWA20021130_HPP
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