| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_TIME_DEFAULT_TICK_CLOCK_H_ |
| #define BASE_TIME_DEFAULT_TICK_CLOCK_H_ |
| |
| #include "base/base_export.h" |
| #include "base/time/tick_clock.h" |
| |
| namespace base { |
| |
| // DefaultTickClock is a TickClock implementation that uses TimeTicks::Now(). |
| // This is typically used by components that expose a SetTickClockForTesting(). |
| // Note: Overriding Time/TimeTicks altogether via |
| // TaskEnvironment::TimeSource::MOCK_TIME is now the preferred way of overriding |
| // time in unit tests. As such, there shouldn't be many new use cases for |
| // TickClock/DefaultTickClock anymore. |
| class BASE_EXPORT DefaultTickClock : public TickClock { |
| public: |
| ~DefaultTickClock() override; |
| |
| // Simply returns TimeTicks::Now(). |
| TimeTicks NowTicks() const override; |
| |
| // Returns a shared instance of DefaultTickClock. This is thread-safe. |
| static const DefaultTickClock* GetInstance(); |
| }; |
| |
| } // namespace base |
| |
| #endif // BASE_TIME_DEFAULT_TICK_CLOCK_H_ |