1 /*
2  * Copyright (C) 2021-2022 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 TIMER_H
17 #define TIMER_H
18 
19 #include "base_def.h"
20 #include <mutex>
21 #include <functional>
22 
23 namespace utility {
24 #define MS_PER_SECOND 1000
25 #define NS_PER_MS 1000000
26 
27 class Timer {
28 public:
29     /**
30      * @brief Construct a new Timer object
31      *
32      * @param callback Timer's callback function.
33      * @since 6
34      */
35     Timer(const std::function<void()> &callback);
36 
37     /**
38      * @brief Destroy the Timer object
39      *
40      * @since 6
41      */
42     ~Timer();
43 
44     /**
45      * @brief Start Running Timer.
46      *
47      * @param ms Countdown time.
48      * @param isPeriodic Timer isPeriodic.
49      * @return Success set timer return true, else return false.
50      * @since 6
51      */
52     bool Start(int ms, bool isPeriodic = false);
53 
54     /**
55      * @brief Stop Running Timer.
56      *
57      * @return Success stop timer return true, else return false.
58      * @since 6
59      */
60     bool Stop();
61 
62 private:
63     int fd_ {-1};
64     std::mutex mutex_ {};
65     std::function<void()> callback_ {};
66 
67     friend class TimerManager;
68     BT_DISALLOW_COPY_AND_ASSIGN(Timer);
69 };
70 }  // namespace utility
71 
72 #endif  // TIMER_H
73