1 // Copyright 2018 The Android Open Source Project 2 // 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 #pragma once 15 16 #include <inttypes.h> 17 18 namespace android { 19 namespace base { 20 21 // CPU usage tracking 22 struct CpuTime { 23 uint64_t wall_time_us = 0; 24 uint64_t user_time_us = 0; 25 uint64_t system_time_us = 0; 26 27 CpuTime& operator-=(const CpuTime& other); 28 29 uint64_t usageUs() const; 30 // Usage proportion; convert to percent by 31 // multiplying by 100. 32 float usage() const; 33 float usageUser() const; 34 float usageSystem() const; 35 }; 36 37 CpuTime operator-(const CpuTime& a, const CpuTime& b); 38 39 } // namespace base 40 } // namespace android 41