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 ECMASCRIPT_MEM_CLOCK_SCOPE_H
17 #define ECMASCRIPT_MEM_CLOCK_SCOPE_H
18 
19 #include <ctime>
20 #include <chrono>
21 
22 namespace panda::ecmascript {
23 class ClockScope {
24 using Clock = std::chrono::high_resolution_clock;
25 using Duration = std::chrono::duration<uint64_t, std::nano>;
26 
27 public:
ClockScope()28     ClockScope()
29     {
30         start_ = Clock::now();
31     }
32 
Reset()33     void Reset()
34     {
35         start_ = Clock::now();
36     }
37 
GetPauseTime() const38     Duration GetPauseTime() const
39     {
40         return Clock::now() - start_;
41     }
42 
TotalSpentTime() const43     float TotalSpentTime() const
44     {
45         auto duration = std::chrono::duration_cast<std::chrono::microseconds>(Clock::now() - start_);
46         return (float) duration.count() / MILLION_TIME;
47     }
48 
TotalSpentTimeInMicroseconds() const49     int TotalSpentTimeInMicroseconds() const
50     {
51         return std::chrono::duration_cast<std::chrono::microseconds>(Clock::now() - start_).count();
52     }
53 
GetCurTime() const54     double GetCurTime() const
55     {
56         auto curTime_ = Duration(start_.time_since_epoch());
57         return (double) curTime_.count() / MILLION_TIME;
58     }
59 
60 private:
61     NO_COPY_SEMANTIC(ClockScope);
62     NO_MOVE_SEMANTIC(ClockScope);
63 
64     Clock::time_point start_;
65     static constexpr uint32_t MILLION_TIME = 1000;
66 };
67 }  // namespace panda::ecmascript
68 #endif  // ECMASCRIPT_MEM_CLOCK_SCOPE_H
69