1 /*
2  * Copyright (c) 2022-2023 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 ELAPSED_TIME_H
17 #define ELAPSED_TIME_H
18 
19 #include <chrono>
20 #include "dfx_log.h"
21 namespace OHOS {
22 namespace HiviewDFX {
23 class ElapsedTime {
24 public:
ElapsedTime()25     ElapsedTime()
26     {
27         begin_ = std::chrono::high_resolution_clock::now();
28     };
29 
ElapsedTime(std::string printContent,time_t limitCostMilliseconds)30     ElapsedTime(std::string printContent, time_t limitCostMilliseconds)
31         : limitCostMilliseconds_(limitCostMilliseconds), printContent_(std::move(printContent))
32     {
33         Reset();
34     }
35 
~ElapsedTime()36     ~ElapsedTime()
37     {
38         if (limitCostMilliseconds_ != 0) {
39             time_t costTime = Elapsed<std::chrono::milliseconds>();
40             if (costTime > limitCostMilliseconds_) {
41                 DFXLOG_WARN("%s running %" PRId64 " ms", printContent_.c_str(), costTime);
42             }
43         }
44     }
45 
Reset()46     void Reset()
47     {
48         begin_ = std::chrono::high_resolution_clock::now();
49     };
50 
51     template<typename Duration=std::chrono::nanoseconds>
Elapsed()52     time_t Elapsed() const
53     {
54         return std::chrono::duration_cast<Duration>(std::chrono::high_resolution_clock::now() - begin_).count();
55     };
56 
57 private:
58     std::chrono::time_point<std::chrono::high_resolution_clock> begin_;
59     time_t limitCostMilliseconds_ = 0;
60     std::string printContent_ = "";
61 };
62 }
63 }
64 #endif
65