// Copyright (c) 2012 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 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_