/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_timeoutbudgetmanager_h

#define mozilla_dom_timeoutbudgetmanager_h

#include "mozilla/Telemetry.h"

#include "mozilla/TimeStamp.h"

namespace mozilla {

namespace dom {

class Timeout;

class TimeoutBudgetManager

{

public:

  static TimeoutBudgetManager& Get();

  void StartRecording(const TimeStamp& aNow);

  void StopRecording();

  TimeDuration RecordExecution(const TimeStamp& aNow,

                               const Timeout* aTimeout,

                               bool aIsBackground);

  void MaybeCollectTelemetry(const TimeStamp& aNow);

private:

  TimeoutBudgetManager() : mLastCollection(TimeStamp::Now()) {}

  struct TelemetryData

  {

    TimeDuration mForegroundTracking;

    TimeDuration mForegroundNonTracking;

    TimeDuration mBackgroundTracking;

    TimeDuration mBackgroundNonTracking;

  };

  void Accumulate(Telemetry::HistogramID aId, const TimeDuration& aSample);

  TelemetryData mTelemetryData;

  TimeStamp mStart;

  TimeStamp mLastCollection;

};

} // namespace dom

} // namespace mozilla

#endif // mozilla_dom_timeoutbudgetmanager_h