1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef PREFERENCES_IMPL_H 17 #define PREFERENCES_IMPL_H 18 19 #include <any> 20 #include <condition_variable> 21 #include <filesystem> 22 #include <list> 23 #include <unordered_map> 24 #include <unordered_set> 25 #include <string> 26 #include <vector> 27 #include <shared_mutex> 28 #include "safe_block_queue.h" 29 #include "preferences_base.h" 30 #include "preferences_observer_stub.h" 31 32 namespace OHOS { 33 namespace NativePreferences { 34 35 class PreferencesImpl : public PreferencesBase, public std::enable_shared_from_this<PreferencesImpl> { 36 public: GetPreferences(const Options & options)37 static std::shared_ptr<PreferencesImpl> GetPreferences(const Options &options) 38 { 39 return std::shared_ptr<PreferencesImpl>(new PreferencesImpl(options)); 40 } 41 virtual ~PreferencesImpl(); 42 43 int Init(); 44 45 PreferencesValue Get(const std::string &key, const PreferencesValue &defValue) override; 46 47 int Put(const std::string &key, const PreferencesValue &value) override; 48 49 bool HasKey(const std::string &key) override; 50 51 std::map<std::string, PreferencesValue> GetAll() override; 52 53 int Delete(const std::string &key) override; 54 55 int Clear() override; 56 57 void Flush() override; 58 59 int FlushSync() override; 60 61 int Close() override; 62 63 bool IsClose(const std::string &name) override; 64 65 std::pair<int, PreferencesValue> GetValue(const std::string &key, const PreferencesValue &defValue) override; 66 67 std::pair<int, std::map<std::string, PreferencesValue>> GetAllData() override; 68 69 std::unordered_map<std::string, PreferencesValue> GetAllDatas() override; 70 private: 71 explicit PreferencesImpl(const Options &options); 72 73 static void NotifyPreferencesObserver(std::shared_ptr<PreferencesImpl> pref, 74 std::shared_ptr<std::unordered_set<std::string>> keysModified, 75 std::shared_ptr<std::unordered_map<std::string, PreferencesValue>> writeToDisk); 76 bool StartLoadFromDisk(); 77 bool PreLoad(); 78 79 /* thread function */ 80 static void LoadFromDisk(std::shared_ptr<PreferencesImpl> pref); 81 bool ReloadFromDisk(); 82 inline void AwaitLoadFile(); 83 static int WriteToDiskFile(std::shared_ptr<PreferencesImpl> pref); 84 bool ReadSettingXml(std::unordered_map<std::string, PreferencesValue> &conMap); 85 86 std::atomic<bool> loaded_; 87 bool isNeverUnlock_; 88 bool loadResult_; 89 90 std::unordered_set<std::string> modifiedKeys_; 91 92 std::atomic<bool> isCleared_; 93 94 std::atomic<bool> isActive_; 95 96 std::shared_mutex cacheMutex_; 97 98 std::unordered_map<std::string, PreferencesValue> valuesCache_; 99 100 std::shared_ptr<SafeBlockQueue<uint64_t>> queue_; 101 102 std::shared_ptr<DataObsMgrClient> dataObsMgrClient_; 103 }; 104 } // End of namespace NativePreferences 105 } // End of namespace OHOS 106 #endif // End of #ifndef PREFERENCES_IMPL_H