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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_NETWORK_TIME_TIME_TRACKER_TIME_TRACKER_H_
#define COMPONENTS_NETWORK_TIME_TIME_TRACKER_TIME_TRACKER_H_
#include "base/time/time.h"
namespace network_time {
// A class that's created with a known good time, and provides an estimate of
// the current time by adding the system clock seconds that have elapsed since
// it was created.
class TimeTracker {
public:
struct TimeTrackerState {
base::Time system_time;
base::TimeTicks system_ticks;
base::Time known_time;
base::TimeDelta uncertainty;
};
TimeTracker(const base::Time& system_time,
const base::TimeTicks& system_ticks,
const base::Time& time,
const base::TimeDelta& uncertainty);
~TimeTracker() = default;
// Returns true if the time is available, false otherwise (e.g. if sync was
// lost). Sets |estimated_ time| to an estimate of the true time. If
// |uncertainty| is non-NULL, it will be set to an estimate of the error
// range. |system_time| and |system_ticks| should come from the same clocks
// used to retrieve the system time on creation.
bool GetTime(const base::Time& system_time,
const base::TimeTicks& system_ticks,
base::Time* time,
base::TimeDelta* uncertainty) const;
TimeTrackerState GetStateAtCreation() const { return state_; }
private:
TimeTrackerState state_;
};
} // namespace network_time
#endif // COMPONENTS_NETWORK_TIME_TIME_TRACKER_TIME_TRACKER_H_
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