| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #ifndef android_hardware_automotive_vehicle_V2_0_impl_PropertyDb_H_ |
| #define android_hardware_automotive_vehicle_V2_0_impl_PropertyDb_H_ |
| |
| #include <cstdint> |
| #include <unordered_map> |
| #include <map> |
| #include <memory> |
| #include <mutex> |
| |
| #include <android/hardware/automotive/vehicle/2.0/types.h> |
| |
| namespace android { |
| namespace hardware { |
| namespace automotive { |
| namespace vehicle { |
| namespace V2_0 { |
| |
| /** |
| * Encapsulates work related to storing and accessing configuration, storing and modifying |
| * vehicle property values. |
| * |
| * VehiclePropertyValues stored in a sorted map thus it makes easier to get range of values, e.g. |
| * to get value for all areas for particular property. |
| * |
| * This class is thread-safe, however it uses blocking synchronization across all methods. |
| */ |
| class VehiclePropertyStore { |
| public: |
| /* Function that used to calculate unique token for given VehiclePropValue */ |
| using TokenFunction = std::function<int64_t(const VehiclePropValue& value)>; |
| |
| private: |
| struct RecordConfig { |
| VehiclePropConfig propConfig; |
| TokenFunction tokenFunction; |
| }; |
| |
| struct RecordId { |
| int32_t prop; |
| int32_t area; |
| int64_t token; |
| |
| bool operator==(const RecordId& other) const; |
| bool operator<(const RecordId& other) const; |
| }; |
| |
| using PropertyMap = std::map<RecordId, VehiclePropValue>; |
| using PropertyMapRange = std::pair<PropertyMap::const_iterator, PropertyMap::const_iterator>; |
| |
| public: |
| void registerProperty(const VehiclePropConfig& config, TokenFunction tokenFunc = nullptr); |
| |
| /* Stores provided value. Returns true if value was written returns false if config for |
| * example wasn't registered. */ |
| bool writeValue(const VehiclePropValue& propValue, bool updateStatus); |
| |
| void removeValue(const VehiclePropValue& propValue); |
| void removeValuesForProperty(int32_t propId); |
| |
| std::vector<VehiclePropValue> readAllValues() const; |
| std::vector<VehiclePropValue> readValuesForProperty(int32_t propId) const; |
| std::unique_ptr<VehiclePropValue> readValueOrNull(const VehiclePropValue& request) const; |
| std::unique_ptr<VehiclePropValue> readValueOrNull(int32_t prop, int32_t area = 0, |
| int64_t token = 0) const; |
| |
| std::vector<VehiclePropConfig> getAllConfigs() const; |
| const VehiclePropConfig* getConfigOrNull(int32_t propId) const; |
| const VehiclePropConfig* getConfigOrDie(int32_t propId) const; |
| |
| private: |
| RecordId getRecordIdLocked(const VehiclePropValue& valuePrototype) const; |
| const VehiclePropValue* getValueOrNullLocked(const RecordId& recId) const; |
| PropertyMapRange findRangeLocked(int32_t propId) const; |
| |
| private: |
| using MuxGuard = std::lock_guard<std::mutex>; |
| mutable std::mutex mLock; |
| std::unordered_map<int32_t /* VehicleProperty */, RecordConfig> mConfigs; |
| |
| PropertyMap mPropertyValues; // Sorted map of RecordId : VehiclePropValue. |
| }; |
| |
| } // namespace V2_0 |
| } // namespace vehicle |
| } // namespace automotive |
| } // namespace hardware |
| } // namespace android |
| |
| #endif //android_hardware_automotive_vehicle_V2_0_impl_PropertyDb_H_ |