| /** |
| * 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. |
| **/ |
| |
| #ifndef QUICKSTEP_UTILITY_COLUMN_VECTOR_CACHE_HPP_ |
| #define QUICKSTEP_UTILITY_COLUMN_VECTOR_CACHE_HPP_ |
| |
| #include <unordered_map> |
| |
| #include "types/containers/ColumnVector.hpp" |
| #include "utility/Macros.hpp" |
| |
| #include "glog/logging.h" |
| |
| namespace quickstep { |
| |
| /** \addtogroup Expressions |
| * @{ |
| */ |
| |
| /** |
| * @brief A memoization table for column vectors parameterized on integer IDs. |
| **/ |
| class ColumnVectorCache { |
| public: |
| /** |
| * @brief Constructor. |
| */ |
| ColumnVectorCache() {} |
| |
| /** |
| * @brief Check whether this cache contains the column vector parameterized on |
| * the given ID. |
| * |
| * @param share_id The integer ID for the column vector. |
| * @return True if this cache contains the column vector; false otherwise. |
| */ |
| inline bool contains(const int share_id) const { |
| return cv_cache_.find(share_id) != cv_cache_.end(); |
| } |
| |
| /** |
| * @brief Get the cached column vector parameterized on the given ID. |
| * |
| * @param share_id The integer ID for the column vector. |
| * @return The cached column vector. |
| */ |
| inline ColumnVectorPtr get(const int share_id) const { |
| DCHECK(contains(share_id)); |
| return cv_cache_.at(share_id); |
| } |
| |
| /** |
| * @brief Cache the column vector with the given ID as parameter. |
| * |
| * @param share_id The integer ID for the column vector. |
| * @param cv The column vector to be cached. |
| */ |
| inline void set(const int share_id, const ColumnVectorPtr &cv) { |
| DCHECK(!contains(share_id)); |
| cv_cache_.emplace(share_id, cv); |
| } |
| |
| private: |
| std::unordered_map<int, ColumnVectorPtr> cv_cache_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ColumnVectorCache); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_UTILITY_COLUMN_VECTOR_CACHE_HPP_ |