| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UTIL_TICKS_H_ |
| #define UTIL_TICKS_H_ |
| |
| #include <stdint.h> |
| |
| using Ticks = uint64_t; |
| |
| class TickDelta { |
| public: |
| explicit TickDelta(uint64_t delta) : delta_(delta) {} |
| |
| double InSecondsF() const { return delta_ / 1000000000.0; } |
| double InMillisecondsF() const { return delta_ / 1000000.0; } |
| double InMicrosecondsF() const { return delta_ / 1000.0; } |
| double InNanosecondsF() const { return delta_; } |
| |
| uint64_t InSeconds() const { return delta_ / 1000000000; } |
| uint64_t InMilliseconds() const { return delta_ / 1000000; } |
| uint64_t InMicroseconds() const { return delta_ / 1000; } |
| uint64_t InNanoseconds() const { return delta_; } |
| |
| uint64_t raw() const { return delta_; } |
| |
| private: |
| uint64_t delta_; |
| }; |
| |
| Ticks TicksNow(); |
| |
| TickDelta TicksDelta(Ticks new_ticks, Ticks old_ticks); |
| |
| class ElapsedTimer { |
| public: |
| ElapsedTimer() : start_(TicksNow()) {} |
| TickDelta Elapsed() { return TicksDelta(TicksNow(), start_); } |
| |
| private: |
| Ticks start_; |
| }; |
| |
| #endif // UTIL_TICKS_H_ |