1 // Copyright 2020 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 15 #include "pw_chrono/system_clock.h" 16 17 namespace pw::chrono { 18 namespace { 19 20 class RealSystemClock final : public VirtualSystemClock { 21 public: now()22 SystemClock::time_point now() final { return SystemClock::now(); } 23 }; 24 RealSystemClock real_system_clock; 25 26 } // namespace 27 RealClock()28VirtualSystemClock& VirtualSystemClock::RealClock() { 29 return real_system_clock; 30 } 31 32 } // namespace pw::chrono 33 pw_chrono_SystemClock_Now()34extern "C" pw_chrono_SystemClock_TimePoint pw_chrono_SystemClock_Now() { 35 return { 36 .duration_since_epoch = { 37 .ticks = pw::chrono::SystemClock::now().time_since_epoch().count()}}; 38 } 39 pw_chrono_SystemClock_TimeElapsed(pw_chrono_SystemClock_TimePoint last_time,pw_chrono_SystemClock_TimePoint current_time)40extern "C" pw_chrono_SystemClock_Duration pw_chrono_SystemClock_TimeElapsed( 41 pw_chrono_SystemClock_TimePoint last_time, 42 pw_chrono_SystemClock_TimePoint current_time) { 43 return {.ticks = current_time.duration_since_epoch.ticks - 44 last_time.duration_since_epoch.ticks}; 45 } 46 47 extern "C" pw_chrono_SystemClock_Nanoseconds pw_chrono_SystemClock_DurationToNsFloor(pw_chrono_SystemClock_Duration duration)48pw_chrono_SystemClock_DurationToNsFloor( 49 pw_chrono_SystemClock_Duration duration) { 50 return std::chrono::floor<std::chrono::nanoseconds>( 51 pw::chrono::SystemClock::duration(duration.ticks)) 52 .count(); 53 } 54