| /* |
| * 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. |
| */ |
| |
| /*! |
| * \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 <memory> |
| #include <vector> |
| |
| 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_api The device API. |
| */ |
| WorkspacePool(DLDeviceType device_type, DeviceAPI* device_api); |
| /*! \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 */ |
| DeviceAPI* device_; |
| }; |
| |
| } // namespace runtime |
| } // namespace tvm |
| #endif // TVM_RUNTIME_WORKSPACE_POOL_H_ |