[857] | 1 | // Copyright David Abrahams 2002.
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| 2 | // Distributed under the Boost Software License, Version 1.0. (See
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| 3 | // accompanying file LICENSE_1_0.txt or copy at
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| 4 | // http://www.boost.org/LICENSE_1_0.txt)
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| 5 | #ifndef SHARED_PTR_FROM_PYTHON_DWA20021130_HPP
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| 6 | # define SHARED_PTR_FROM_PYTHON_DWA20021130_HPP
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| 7 |
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| 8 | # include <boost/python/handle.hpp>
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| 9 | # include <boost/python/converter/shared_ptr_deleter.hpp>
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| 10 | # include <boost/python/converter/from_python.hpp>
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| 11 | # include <boost/python/converter/rvalue_from_python_data.hpp>
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| 12 | # include <boost/python/converter/registered.hpp>
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| 13 | # include <boost/shared_ptr.hpp>
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| 14 |
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| 15 | namespace boost { namespace python { namespace converter {
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| 16 |
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| 17 | template <class T>
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| 18 | struct shared_ptr_from_python
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| 19 | {
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| 20 | shared_ptr_from_python()
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| 21 | {
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| 22 | converter::registry::insert(&convertible, &construct, type_id<shared_ptr<T> >());
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| 23 | }
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| 24 |
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| 25 | private:
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| 26 | static void* convertible(PyObject* p)
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| 27 | {
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| 28 | if (p == Py_None)
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| 29 | return p;
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| 30 |
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| 31 | return converter::get_lvalue_from_python(p, registered<T>::converters);
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| 32 | }
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| 33 |
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| 34 | static void construct(PyObject* source, rvalue_from_python_stage1_data* data)
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| 35 | {
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| 36 | void* const storage = ((converter::rvalue_from_python_storage<shared_ptr<T> >*)data)->storage.bytes;
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| 37 | // Deal with the "None" case.
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| 38 | if (data->convertible == source)
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| 39 | new (storage) shared_ptr<T>();
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| 40 | else
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| 41 | new (storage) shared_ptr<T>(
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| 42 | static_cast<T*>(data->convertible),
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| 43 | shared_ptr_deleter(handle<>(borrowed(source)))
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| 44 | );
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| 45 |
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| 46 | data->convertible = storage;
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| 47 | }
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| 48 | };
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| 49 |
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| 50 | }}} // namespace boost::python::converter
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| 51 |
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| 52 | #endif // SHARED_PTR_FROM_PYTHON_DWA20021130_HPP
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