forked from mirrors/gecko-dev
298aa82710
This was automatically generated by the script modeline.py. MozReview-Commit-ID: BgulzkGteAL --HG-- extra : rebase_source : a4b9d16a4c06c4e85d7d85f485221b1e4ebdfede
96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_timeoutexecutor_h
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#define mozilla_dom_timeoutexecutor_h
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#include "mozilla/TimeStamp.h"
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#include "nsCOMPtr.h"
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#include "nsIRunnable.h"
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#include "nsITimer.h"
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#include "nsINamed.h"
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namespace mozilla {
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namespace dom {
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class TimeoutManager;
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class TimeoutExecutor final : public nsIRunnable
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, public nsITimerCallback
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, public nsINamed
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{
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TimeoutManager* mOwner;
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nsCOMPtr<nsITimer> mTimer;
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TimeStamp mDeadline;
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// Limits how far we allow timers to fire into the future from their
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// deadline. Starts off at zero, but is then adjusted when we start
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// using nsITimer. The nsITimer implementation may sometimes fire
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// early and we should allow that to minimize additional wakeups.
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TimeDuration mAllowedEarlyFiringTime;
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// The TimeoutExecutor is repeatedly scheduled by the TimeoutManager
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// to fire for the next soonest Timeout. Since the executor is re-used
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// it needs to handle switching between a few states.
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enum class Mode
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{
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// None indicates the executor is idle. It may be scheduled or shutdown.
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None,
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// Immediate means the executor is scheduled to run a Timeout with a
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// deadline that has already expired.
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Immediate,
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// Delayed means the executor is scheduled to run a Timeout with a
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// deadline in the future.
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Delayed,
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// Shutdown means the TimeoutManager has been destroyed. Once this
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// state is reached the executor cannot be scheduled again. If the
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// executor is already dispatched as a runnable or held by a timer then
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// we may still get a Run()/Notify() call which will be ignored.
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Shutdown
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};
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Mode mMode;
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~TimeoutExecutor();
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nsresult
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ScheduleImmediate(const TimeStamp& aDeadline, const TimeStamp& aNow);
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nsresult
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ScheduleDelayed(const TimeStamp& aDeadline, const TimeStamp& aNow,
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const TimeDuration& aMinDelay);
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nsresult
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Schedule(const TimeStamp& aDeadline, const TimeDuration& aMinDelay);
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nsresult
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MaybeReschedule(const TimeStamp& aDeadline, const TimeDuration& aMinDelay);
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void
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MaybeExecute();
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public:
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explicit TimeoutExecutor(TimeoutManager* aOwner);
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void
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Shutdown();
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nsresult
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MaybeSchedule(const TimeStamp& aDeadline, const TimeDuration& aMinDelay);
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void
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Cancel();
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NS_DECL_ISUPPORTS
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NS_DECL_NSIRUNNABLE
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NS_DECL_NSITIMERCALLBACK
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NS_DECL_NSINAMED
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_timeoutexecutor_h
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