1 // Copyright 2022 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://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, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #pragma once 15 16 #include <chrono> 17 #include <cstdbool> 18 19 #include "pw_chrono/system_clock.h" 20 #include "pw_perf_test/internal/duration_unit.h" 21 22 namespace pw::perf_test::internal::backend { 23 24 using Timestamp = chrono::SystemClock::time_point; 25 26 inline constexpr DurationUnit kDurationUnit = DurationUnit::kNanoseconds; 27 TimerPrepare()28[[nodiscard]] inline bool TimerPrepare() { return true; } 29 TimerCleanup()30inline void TimerCleanup() {} 31 GetCurrentTimestamp()32inline Timestamp GetCurrentTimestamp() { return chrono::SystemClock::now(); } 33 GetDuration(Timestamp begin,Timestamp end)34inline int64_t GetDuration(Timestamp begin, Timestamp end) { 35 return std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin) 36 .count(); 37 } 38 39 } // namespace pw::perf_test::internal::backend 40