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// Copyright David Abrahams 2002.
// Copyright Stefan Seefeld 2016.
// 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 boost_python_converter_shared_ptr_from_python_hpp_
#define boost_python_converter_shared_ptr_from_python_hpp_
#include <boost/python/handle.hpp>
#include <boost/python/converter/shared_ptr_deleter.hpp>
#include <boost/python/converter/from_python.hpp>
#include <boost/python/converter/rvalue_from_python_data.hpp>
#include <boost/python/converter/registered.hpp>
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
# include <boost/python/converter/pytype_function.hpp>
#endif
#include <boost/shared_ptr.hpp>
#include <memory>
namespace boost { namespace python { namespace converter {
template <class T, template <typename> class SP>
struct shared_ptr_from_python
{
shared_ptr_from_python()
{
converter::registry::insert(&convertible, &construct, type_id<SP<T> >()
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
, &converter::expected_from_python_type_direct<T>::get_pytype
#endif
);
}
private:
static void* convertible(PyObject* p)
{
if (p == Py_None)
return p;
return converter::get_lvalue_from_python(p, registered<T>::converters);
}
static void construct(PyObject* source, rvalue_from_python_stage1_data* data)
{
void* const storage = ((converter::rvalue_from_python_storage<SP<T> >*)data)->storage.bytes;
// Deal with the "None" case.
if (data->convertible == source)
new (storage) SP<T>();
else
{
SP<void> hold_convertible_ref_count(
(void*)0, shared_ptr_deleter(handle<>(borrowed(source))) );
// use aliasing constructor
new (storage) SP<T>(hold_convertible_ref_count,
static_cast<T*>(data->convertible));
}
data->convertible = storage;
}
};
}}} // namespace boost::python::converter
#endif
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