зеркало из https://github.com/mozilla/gecko-dev.git
117 строки
3.9 KiB
C++
117 строки
3.9 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_EventQueue_h
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#define mozilla_EventQueue_h
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#include "mozilla/AbstractEventQueue.h"
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#include "mozilla/Queue.h"
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#include "nsCOMPtr.h"
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class nsIRunnable;
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namespace mozilla {
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class IdlePeriodState;
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namespace detail {
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template <size_t ItemsPerPage>
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class EventQueueInternal : public AbstractEventQueue {
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public:
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static const bool SupportsPrioritization = false;
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EventQueueInternal() {}
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explicit EventQueueInternal(EventQueuePriority aPriority);
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void PutEvent(already_AddRefed<nsIRunnable>&& aEvent,
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EventQueuePriority aPriority, const MutexAutoLock& aProofOfLock,
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mozilla::TimeDuration* aDelay = nullptr) final;
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already_AddRefed<nsIRunnable> GetEvent(
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EventQueuePriority* aPriority, const MutexAutoLock& aProofOfLock,
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mozilla::TimeDuration* aLastEventDelay = nullptr) final;
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already_AddRefed<nsIRunnable> GetEvent(EventQueuePriority* aPriority,
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const MutexAutoLock& aProofOfLock,
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TimeDuration* aLastEventDelay,
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bool* aIsIdleEvent) {
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*aIsIdleEvent = false;
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return GetEvent(aPriority, aProofOfLock, aLastEventDelay);
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}
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void DidRunEvent(const MutexAutoLock& aProofOfLock) {}
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bool IsEmpty(const MutexAutoLock& aProofOfLock) final;
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bool HasReadyEvent(const MutexAutoLock& aProofOfLock) final;
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bool HasPendingHighPriorityEvents(const MutexAutoLock& aProofOfLock) final {
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// EventQueueInternal doesn't support any prioritization.
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return false;
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}
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size_t Count(const MutexAutoLock& aProofOfLock) const final;
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// For some reason, if we put this in the .cpp file the linker can't find it
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already_AddRefed<nsIRunnable> PeekEvent(const MutexAutoLock& aProofOfLock) {
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if (mQueue.IsEmpty()) {
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return nullptr;
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}
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nsCOMPtr<nsIRunnable> result = mQueue.FirstElement();
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return result.forget();
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}
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void EnableInputEventPrioritization(const MutexAutoLock& aProofOfLock) final {
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}
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void FlushInputEventPrioritization(const MutexAutoLock& aProofOfLock) final {}
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void SuspendInputEventPrioritization(
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const MutexAutoLock& aProofOfLock) final {}
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void ResumeInputEventPrioritization(const MutexAutoLock& aProofOfLock) final {
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}
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IdlePeriodState* GetIdlePeriodState() const { return nullptr; }
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bool HasIdleRunnables(const MutexAutoLock& aProofOfLock) const {
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return false;
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}
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size_t SizeOfExcludingThis(
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mozilla::MallocSizeOf aMallocSizeOf) const override {
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size_t size = mQueue.ShallowSizeOfExcludingThis(aMallocSizeOf);
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#ifdef MOZ_GECKO_PROFILER
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size += mDispatchTimes.ShallowSizeOfExcludingThis(aMallocSizeOf);
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#endif
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return size;
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}
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private:
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mozilla::Queue<nsCOMPtr<nsIRunnable>, ItemsPerPage> mQueue;
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#ifdef MOZ_GECKO_PROFILER
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// This queue is only populated when the profiler is turned on.
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mozilla::Queue<mozilla::TimeStamp, ItemsPerPage> mDispatchTimes;
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TimeDuration mLastEventDelay;
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#endif
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};
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} // namespace detail
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class EventQueue final : public mozilla::detail::EventQueueInternal<16> {
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public:
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EventQueue() : mozilla::detail::EventQueueInternal<16>() {}
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explicit EventQueue(EventQueuePriority aPriority)
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: mozilla::detail::EventQueueInternal<16>(aPriority){};
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};
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template <size_t ItemsPerPage = 16>
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class EventQueueSized final
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: public mozilla::detail::EventQueueInternal<ItemsPerPage> {
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public:
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EventQueueSized() : mozilla::detail::EventQueueInternal<ItemsPerPage>() {}
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explicit EventQueueSized(EventQueuePriority aPriority)
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: mozilla::detail::EventQueueInternal<ItemsPerPage>(aPriority){};
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};
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} // namespace mozilla
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#endif // mozilla_EventQueue_h
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