66 lines
2.0 KiB
Plaintext
66 lines
2.0 KiB
Plaintext
// Copyright David Abrahams 2002.
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// Copyright Stefan Seefeld 2016.
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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 boost_python_converter_shared_ptr_from_python_hpp_
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#define boost_python_converter_shared_ptr_from_python_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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#include <memory>
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namespace boost { namespace python { namespace converter {
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template <class T, template <typename> class SP>
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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<SP<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<SP<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) SP<T>();
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else
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{
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SP<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) SP<T>(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
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