1 /*
2  * Copyright (C) 2022 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 NTP_UPDATE_TIME_H
17 #define NTP_UPDATE_TIME_H
18 
19 #include <mutex>
20 #include <string>
21 #include <atomic>
22 
23 namespace OHOS {
24 namespace MiscServices {
25 struct AutoTimeInfo {
26     std::string ntpServer;
27     std::string ntpServerSpec;
28     std::string status;
29     int64_t lastUpdateTime;
30 };
31 
32 class NtpUpdateTime {
33 public:
34     static NtpUpdateTime &GetInstance();
35     static bool GetNtpTime(int64_t &time);
36     static bool GetRealTime(int64_t &time);
37     static void SetSystemTime();
38     void RefreshNetworkTimeByTimer(uint64_t timerId);
39     void UpdateNITZSetTime();
40     void Stop();
41     void Init();
42     int32_t MonitorNetwork();
43     bool IsValidNITZTime();
44     uint64_t GetNITZUpdateTime();
45 
46 private:
47     NtpUpdateTime();
48     static bool GetNtpTimeInner(uint64_t interval);
49     static bool GetRealTimeInner(int64_t &time);
50     static void ChangeNtpServerCallback(const char *key, const char *value, void *context);
51     static std::vector<std::string> SplitNtpAddrs(const std::string &ntpStr);
52     void StartTimer();
53     void RefreshNextTriggerTime();
54     bool CheckStatus();
55     void RegisterSystemParameterListener();
56     static void ChangeAutoTimeCallback(const char *key, const char *value, void *context);
57 
58     static AutoTimeInfo autoTimeInfo_;
59     uint64_t timerId_;
60     uint64_t nitzUpdateTimeMilli_;
61     uint64_t nextTriggerTime_;
62     static std::mutex requestMutex_;
63     int64_t lastNITZUpdateTime_;
64 };
65 } // namespace MiscServices
66 } // namespace OHOS
67 #endif