/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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. */ /*! * Copyright (c) 2017 by Contributors * \file workspace_pool.h * \brief Workspace pool utility. */ #ifndef TVM_RUNTIME_WORKSPACE_POOL_H_ #define TVM_RUNTIME_WORKSPACE_POOL_H_ #include <tvm/runtime/device_api.h> #include <vector> #include <memory> namespace tvm { namespace runtime { /*! * \brief A workspace pool to manage * * \note We have the following assumption about backend temporal * workspace allocation, and will optimize for such assumption, * some of these assumptions can be enforced by the compiler. * * - Only a few allocation will happen, and space will be released after use. * - The release order is usually in reverse order of allocate * - Repeative pattern of same allocations over different runs. */ class TVM_DLL WorkspacePool { public: /*! * \brief Create pool with specific device type and device. * \param device_type The device type. * \param device The device API. */ WorkspacePool(DLDeviceType device_type, std::shared_ptr<DeviceAPI> device); /*! \brief destructor */ ~WorkspacePool(); /*! * \brief Allocate temporal workspace. * \param ctx The context of allocation. * \param size The size to be allocated. */ void* AllocWorkspace(TVMContext ctx, size_t size); /*! * \brief Free temporal workspace in backend execution. * * \param ctx The context of allocation. * \param ptr The pointer to be freed. */ void FreeWorkspace(TVMContext ctx, void* ptr); private: class Pool; /*! \brief pool of device local array */ std::vector<Pool*> array_; /*! \brief device type this pool support */ DLDeviceType device_type_; /*! \brief The device API */ std::shared_ptr<DeviceAPI> device_; }; } // namespace runtime } // namespace tvm #endif // TVM_RUNTIME_WORKSPACE_POOL_H_