| // Copyright 2020 The Pigweed Authors |
| // |
| // 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 |
| // |
| // https://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 <cstdint> |
| |
| namespace pw { |
| namespace kvs { |
| namespace internal { |
| |
| // Whether an entry is present or deleted. |
| enum class EntryState : bool { kValid, kDeleted }; |
| |
| // Essential metadata for an entry that is stored in memory. |
| struct KeyDescriptor { |
| uint32_t key_hash; |
| uint32_t transaction_id; |
| |
| EntryState state; // TODO(hepler): Pack into transaction ID? or something? |
| }; |
| |
| } // namespace internal |
| } // namespace kvs |
| } // namespace pw |
