// Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.//// 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.#pragma once#include <cstddef>#include <cstdint>namespacepaddle{namespaceimperative{structRunnable{};classEngine{public:virtual~Engine(){}virtualvoidEnqueue(Runnable*runnable)=0;virtualsize_tSize()const=0;virtualvoidSync()=0;};Engine*GetEngine();}// namespace imperative}// namespace paddle