зеркало из https://github.com/mozilla/gecko-dev.git
75 строки
2.4 KiB
C++
75 строки
2.4 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 IdleTaskRunner_h
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#define IdleTaskRunner_h
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#include "mozilla/TimeStamp.h"
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#include "mozilla/TaskCategory.h"
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#include "nsThreadUtils.h"
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#include <functional>
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namespace mozilla {
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// A general purpose repeating callback runner (it can be configured
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// to a one-time runner, too.) If it is running repeatedly,
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// one has to either explicitly Cancel() the runner or have
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// MayContinueProcessing() callback return false to completely remove
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// the runner.
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class IdleTaskRunner final : public IdleRunnable
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{
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public:
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// Return true if some meaningful work was done.
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using CallbackType = std::function<bool(TimeStamp aDeadline)>;
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// A callback for "stop processing" decision. Return true to
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// stop processing. This can be an alternative to Cancel() or
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// work together in different way.
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using MayStopProcessingCallbackType = std::function<bool()>;
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public:
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static already_AddRefed<IdleTaskRunner>
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Create(const CallbackType& aCallback,
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const char* aRunnableName, uint32_t aDelay,
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int64_t aBudget, bool aRepeating,
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const MayStopProcessingCallbackType& aMayStopProcessing,
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TaskCategory aTaskCategory = TaskCategory::Count);
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NS_IMETHOD Run() override;
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void SetDeadline(mozilla::TimeStamp aDeadline) override;
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void SetTimer(uint32_t aDelay, nsIEventTarget* aTarget) override;
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nsresult Cancel() override;
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void Schedule(bool aAllowIdleDispatch);
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private:
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explicit IdleTaskRunner(const CallbackType& aCallback,
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const char* aRunnableName,
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uint32_t aDelay, int64_t aBudget,
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bool aRepeating,
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const MayStopProcessingCallbackType& aMayStopProcessing,
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TaskCategory aTaskCategory);
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~IdleTaskRunner();
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void CancelTimer();
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void SetTimerInternal(uint32_t aDelay);
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nsCOMPtr<nsITimer> mTimer;
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nsCOMPtr<nsITimer> mScheduleTimer;
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CallbackType mCallback;
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uint32_t mDelay;
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TimeStamp mDeadline;
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TimeDuration mBudget;
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bool mRepeating;
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bool mTimerActive;
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MayStopProcessingCallbackType mMayStopProcessing;
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TaskCategory mTaskCategory;
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};
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} // end of namespace mozilla.
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#endif
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