//***************************************************************************** // Copyright 2017-2020 Intel Corporation // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. //***************************************************************************** #include <pybind11/pybind11.h> #include <pybind11/stl.h> #include "ngraph/function.hpp" // ngraph::Function #include "ngraph/op/parameter.hpp" // ngraph::op::Parameter #include "pyngraph/function.hpp" namespace py = pybind11; static const char* CAPSULE_NAME = "ngraph_function"; void regclass_pyngraph_Function(py::module m) { py::class_<ngraph::Function, std::shared_ptr<ngraph::Function>> function(m, "Function"); function.doc() = "ngraph.impl.Function wraps ngraph::Function"; function.def(py::init<const std::vector<std::shared_ptr<ngraph::Node>>&, const std::vector<std::shared_ptr<ngraph::op::Parameter>>&, const std::string&>()); function.def(py::init<const std::shared_ptr<ngraph::Node>&, const std::vector<std::shared_ptr<ngraph::op::Parameter>>&, const std::string&>()); function.def("get_output_size", &ngraph::Function::get_output_size); function.def("get_output_op", &ngraph::Function::get_output_op); function.def("get_output_element_type", &ngraph::Function::get_output_element_type); function.def("get_output_shape", &ngraph::Function::get_output_shape); function.def("get_parameters", &ngraph::Function::get_parameters); function.def("get_results", &ngraph::Function::get_results); function.def("get_result", &ngraph::Function::get_result); function.def("get_unique_name", &ngraph::Function::get_name); function.def("get_name", &ngraph::Function::get_friendly_name); function.def("set_friendly_name", &ngraph::Function::set_friendly_name); function.def("__repr__", [](const ngraph::Function& self) { std::string class_name = py::cast(self).get_type().attr("__name__").cast<std::string>(); std::string shape = py::cast(self.get_output_shape(0)).attr("__str__")().cast<std::string>(); return "<" + class_name + ": '" + self.get_friendly_name() + "' (" + shape + ")>"; }); function.def_static("from_capsule", [](py::object* capsule) { // get the underlying PyObject* which is a PyCapsule pointer auto* pybind_capsule_ptr = capsule->ptr(); // extract the pointer stored in the PyCapsule under the name CAPSULE_NAME auto* capsule_ptr = PyCapsule_GetPointer(pybind_capsule_ptr, CAPSULE_NAME); auto* ngraph_function = static_cast<std::shared_ptr<ngraph::Function>*>(capsule_ptr); if (ngraph_function && *ngraph_function) { return *ngraph_function; } else { throw std::runtime_error("The provided capsule does not contain an ngraph::Function"); } }); function.def_static("to_capsule", [](std::shared_ptr<ngraph::Function>& ngraph_function) { // create a shared pointer on the heap before putting it in the capsule // this secures the lifetime of the object transferred by the capsule auto* sp_copy = new std::shared_ptr<ngraph::Function>(ngraph_function); // a destructor callback that will delete the heap allocated shared_ptr // when the capsule is destructed auto sp_deleter = [](PyObject* capsule) { auto* capsule_ptr = PyCapsule_GetPointer(capsule, CAPSULE_NAME); auto* function_sp = static_cast<std::shared_ptr<ngraph::Function>*>(capsule_ptr); if (function_sp) { delete function_sp; } }; // put the shared_ptr in a new capsule under the same name as in "from_capsule" auto pybind_capsule = py::capsule(sp_copy, CAPSULE_NAME, sp_deleter); return pybind_capsule; }); }