/* -*- 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 GFX_VR_PROCESS_MANAGER_H

#define GFX_VR_PROCESS_MANAGER_H

namespace mozilla {

namespace gfx {

class VRProcessParent;

class VRManagerChild;

class PVRGPUChild;

class VRChild;

// The VRProcessManager is a singleton responsible for creating VR-bound

// objects that may live in another process.

class VRProcessManager final

{

public:

  static VRProcessManager* Get();

  static void Initialize();

  static void Shutdown();

  ~VRProcessManager();

  // If not using a VR process, launch a new VR process asynchronously.

  void LaunchVRProcess();

  void DestroyProcess();

  bool CreateGPUBridges(base::ProcessId aOtherProcess,

                        mozilla::ipc::Endpoint<PVRGPUChild>* aOutVRBridge);

  VRChild* GetVRChild();

private:

  VRProcessManager();

  DISALLOW_COPY_AND_ASSIGN(VRProcessManager);

  bool CreateGPUVRManager(base::ProcessId aOtherProcess,

                              mozilla::ipc::Endpoint<PVRGPUChild>* aOutEndpoint);

  void OnXPCOMShutdown();

  void CleanShutdown();

  // Permanently disable the VR process and record a message why.

  void DisableVRProcess(const char* aMessage);

  class Observer final : public nsIObserver {

  public:

    NS_DECL_ISUPPORTS

    NS_DECL_NSIOBSERVER

    explicit Observer(VRProcessManager* aManager);

  protected:

    ~Observer() {}

    VRProcessManager* mManager;

  };

  friend class Observer;

  RefPtr<Observer> mObserver;

  VRProcessParent* mProcess;

};

} // namespace gfx

} // namespace mozilla

#endif // GFX_VR_PROCESS_MANAGER_H