/* -*- 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_EventQueue_h

#define mozilla_EventQueue_h

#include "mozilla/AbstractEventQueue.h"

#include "mozilla/Queue.h"

#include "nsCOMPtr.h"

class nsIRunnable;

namespace mozilla {

class EventQueue final : public AbstractEventQueue

{

public:

  static const bool SupportsPrioritization = false;

  EventQueue() {}

  explicit EventQueue(EventPriority aPriority);

  void PutEvent(already_AddRefed<nsIRunnable>&& aEvent,

                EventPriority aPriority,

                const MutexAutoLock& aProofOfLock) final;

  already_AddRefed<nsIRunnable> GetEvent(EventPriority* aPriority,

                                         const MutexAutoLock& aProofOfLock) final;

  bool IsEmpty(const MutexAutoLock& aProofOfLock) final;

  bool HasReadyEvent(const MutexAutoLock& aProofOfLock) final;

  size_t Count(const MutexAutoLock& aProofOfLock) const final;

  already_AddRefed<nsIRunnable> PeekEvent(const MutexAutoLock& aProofOfLock);

  void EnableInputEventPrioritization(const MutexAutoLock& aProofOfLock) final {}

  void FlushInputEventPrioritization(const MutexAutoLock& aProofOfLock) final {}

  void SuspendInputEventPrioritization(const MutexAutoLock& aProofOfLock) final {}

  void ResumeInputEventPrioritization(const MutexAutoLock& aProofOfLock) final {}

  size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override

  {

    return mQueue.ShallowSizeOfExcludingThis(aMallocSizeOf);

  }

private:

  mozilla::Queue<nsCOMPtr<nsIRunnable>> mQueue;

};

} // namespace mozilla

#endif // mozilla_EventQueue_h