| /* Copyright 2019 Google LLC. All Rights Reserved. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ==============================================================================*/ |
| |
| #ifndef RUY_RUY_TIME_H_ |
| #define RUY_RUY_TIME_H_ |
| |
| #include <chrono> // NOLINT(build/c++11) |
| #include <cstdint> // IWYU pragma: keep |
| #include <ratio> // NOLINT(build/c++11) |
| |
| #ifdef __linux__ |
| #include <sys/time.h> |
| // IWYU pragma: no_include <type_traits> |
| |
| #include <ctime> |
| #endif |
| |
| namespace ruy { |
| |
| using InternalDefaultClock = std::chrono::steady_clock; |
| |
| using TimePoint = InternalDefaultClock::time_point; |
| using Duration = InternalDefaultClock::duration; |
| |
| template <typename RepresentationType> |
| Duration DurationFromSeconds(RepresentationType representation) { |
| return std::chrono::duration_cast<Duration>( |
| std::chrono::duration<RepresentationType>(representation)); |
| } |
| |
| template <typename RepresentationType> |
| Duration DurationFromMilliseconds(RepresentationType representation) { |
| return std::chrono::duration_cast<Duration>( |
| std::chrono::duration<RepresentationType, std::milli>(representation)); |
| } |
| |
| template <typename RepresentationType> |
| Duration DurationFromNanoseconds(RepresentationType representation) { |
| return std::chrono::duration_cast<Duration>( |
| std::chrono::duration<RepresentationType, std::nano>(representation)); |
| } |
| |
| inline float ToFloatSeconds(const Duration& duration) { |
| return std::chrono::duration_cast<std::chrono::duration<float>>(duration) |
| .count(); |
| } |
| |
| inline float ToFloatMilliseconds(const Duration& duration) { |
| return std::chrono::duration_cast<std::chrono::duration<float, std::milli>>( |
| duration) |
| .count(); |
| } |
| |
| inline std::int64_t ToInt64Nanoseconds(const Duration& duration) { |
| return std::chrono::duration_cast< |
| std::chrono::duration<std::int64_t, std::nano>>(duration) |
| .count(); |
| } |
| |
| inline TimePoint Now() { return InternalDefaultClock::now(); } |
| |
| inline TimePoint CoarseNow() { |
| #ifdef __linux__ |
| timespec t; |
| clock_gettime(CLOCK_MONOTONIC_COARSE, &t); |
| return TimePoint( |
| DurationFromNanoseconds(1000000000LL * t.tv_sec + t.tv_nsec)); |
| #else |
| return Now(); |
| #endif |
| } |
| |
| } // namespace ruy |
| |
| #endif // RUY_RUY_TIME_H_ |