CanvasShutdownManager.h

Enable keyboard shortcuts

/* -*- 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 _include_gfx_ipc_CanvasShutdownManager_h__

#define _include_gfx_ipc_CanvasShutdownManager_h__

#include "mozilla/RefPtr.h"

#include "mozilla/StaticMutex.h"

#include "mozilla/ThreadLocal.h"

#include <set>

namespace mozilla {

namespace dom {

class CanvasRenderingContext2D;

class StrongWorkerRef;

class ThreadSafeWorkerRef;

}  // namespace dom

namespace gfx {

class CanvasShutdownManager final {

 public:

  static CanvasShutdownManager* Get();

  static CanvasShutdownManager* MaybeGet();

  static void Shutdown();

  dom::ThreadSafeWorkerRef* GetWorkerRef() const { return mWorkerRef; }

  void AddShutdownObserver(dom::CanvasRenderingContext2D* aCanvas);

  void RemoveShutdownObserver(dom::CanvasRenderingContext2D* aCanvas);

  static void OnCompositorManagerRestored();

  void OnRemoteCanvasLost();

  void OnRemoteCanvasRestored();

 private:

  explicit CanvasShutdownManager(dom::StrongWorkerRef* aWorkerRef);

  CanvasShutdownManager();

  ~CanvasShutdownManager();

  void Destroy();

  static void MaybeRestoreRemoteCanvas();

  RefPtr<dom::ThreadSafeWorkerRef> mWorkerRef;

  std::set<dom::CanvasRenderingContext2D*> mActiveCanvas;

  static MOZ_THREAD_LOCAL(CanvasShutdownManager*) sLocalManager;

  static StaticMutex sManagersMutex;

  static std::set<CanvasShutdownManager*> sManagers;

};

}  // namespace gfx

}  // namespace mozilla

#endif  // _include_gfx_ipc_CanvasShutdownManager_h__