1 /*
2  *
3  * Copyright 2015 gRPC authors.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  */
18 
19 #ifndef TEST_QPS_USAGE_TIMER_H
20 #define TEST_QPS_USAGE_TIMER_H
21 
22 class UsageTimer {
23  public:
24   UsageTimer();
25 
26   struct Result {
27     double wall;
28     double user;
29     double system;
30     unsigned long long total_cpu_time;
31     unsigned long long idle_cpu_time;
32   };
33 
34   Result Mark() const;
35 
36   static double Now();
37 
38  private:
39   static Result Sample();
40 
41   const Result start_;
42 };
43 
44 #endif  // TEST_QPS_TIMER_H
45