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 31 namespace OHOS { 32 namespace NativePreferences { 33 34 class PreferencesImpl : public PreferencesBase, public std::enable_shared_from_this<PreferencesImpl> { 35 public: GetPreferences(const Options & options)36 static std::shared_ptr<PreferencesImpl> GetPreferences(const Options &options) 37 { 38 return std::shared_ptr<PreferencesImpl>(new PreferencesImpl(options)); 39 } 40 virtual ~PreferencesImpl(); 41 42 int Init(); 43 44 PreferencesValue Get(const std::string &key, const PreferencesValue &defValue) override; 45 46 int Put(const std::string &key, const PreferencesValue &value) override; 47 48 bool HasKey(const std::string &key) override; 49 50 std::map<std::string, PreferencesValue> GetAll() override; 51 52 int Delete(const std::string &key) override; 53 54 int Clear() override; 55 56 void Flush() override; 57 58 int FlushSync() override; 59 60 int Close() override; 61 62 bool IsClose(const std::string &name) override; 63 64 std::pair<int, PreferencesValue> GetValue(const std::string &key, const PreferencesValue &defValue) override; 65 66 std::pair<int, std::map<std::string, PreferencesValue>> GetAllData() override; 67 68 std::unordered_map<std::string, PreferencesValue> GetAllDatas() override; 69 private: 70 explicit PreferencesImpl(const Options &options); 71 72 static void NotifyPreferencesObserver(std::shared_ptr<PreferencesImpl> pref, 73 std::shared_ptr<std::unordered_set<std::string>> keysModified, 74 std::shared_ptr<std::unordered_map<std::string, PreferencesValue>> writeToDisk); 75 bool StartLoadFromDisk(); 76 bool PreLoad(); 77 78 /* thread function */ 79 static void LoadFromDisk(std::shared_ptr<PreferencesImpl> pref); 80 bool ReloadFromDisk(); 81 inline void AwaitLoadFile(); 82 static int WriteToDiskFile(std::shared_ptr<PreferencesImpl> pref); 83 bool ReadSettingXml(std::unordered_map<std::string, PreferencesValue> &conMap); 84 85 std::atomic<bool> loaded_; 86 bool isNeverUnlock_; 87 bool loadResult_; 88 89 std::unordered_set<std::string> modifiedKeys_; 90 91 std::atomic<bool> isCleared_; 92 93 std::atomic<bool> isActive_; 94 95 std::shared_mutex cacheMutex_; 96 97 std::unordered_map<std::string, PreferencesValue> valuesCache_; 98 99 std::shared_ptr<SafeBlockQueue<uint64_t>> queue_; 100 }; 101 } // End of namespace NativePreferences 102 } // End of namespace OHOS 103 #endif // End of #ifndef PREFERENCES_IMPL_H