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base / time / default_tick_clock.h [blame]
// 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_