chromium/components/metrics/daily_event.h

// Copyright 2014 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_METRICS_DAILY_EVENT_H_
#define COMPONENTS_METRICS_DAILY_EVENT_H_

#include <memory>
#include <string>
#include <vector>

#include "base/memory/raw_ptr.h"
#include "base/time/time.h"

class PrefRegistrySimple;
class PrefService;

namespace metrics {

// DailyEvent is used for throttling an event to about once per day, even if
// the program is restarted more frequently.  It is based on local machine
// time, so it could be fired more often if the clock is changed.
//
// The service using the DailyEvent should first provide all of the Observers
// for the interval, and then arrange for CheckInterval() to be called
// periodically to test if the event should be fired.
class DailyEvent { … };

}  // namespace metrics

#endif  // COMPONENTS_METRICS_DAILY_EVENT_H_