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+/* -*- 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
+
+#include "VRProcessParent.h"
+
+#include "mozilla/ipc/ProtocolUtils.h"
+#include "nsIObserver.h"
+
+namespace mozilla {
+class MemoryReportingProcess;
+namespace ipc {
+template <typename T>
+class Endpoint;
+}
+namespace gfx {
+
+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 VRProcessParent::Listener {
+ 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();
+
+ // Ensure that VR-bound methods can be used. If no VR process is being
+ // used, or one is launched and ready, this function returns immediately.
+ // Otherwise it blocks until the VR process has finished launching.
+ bool EnsureVRReady();
+
+ bool CreateGPUBridges(base::ProcessId aOtherProcess,
+ mozilla::ipc::Endpoint<PVRGPUChild>* aOutVRBridge);
+
+ VRChild* GetVRChild();
+ // If a VR process is present, create a MemoryReportingProcess object.
+ // Otherwise, return null.
+ RefPtr<MemoryReportingProcess> GetProcessMemoryReporter();
+
+ virtual void OnProcessLaunchComplete(VRProcessParent* aParent) override;
+ virtual void OnProcessUnexpectedShutdown(VRProcessParent* aParent) override;
+
+ private:
+ VRProcessManager();
+
+ DISALLOW_COPY_AND_ASSIGN(VRProcessManager);
+
+ bool CreateGPUVRManager(base::ProcessId aOtherProcess,
+ mozilla::ipc::Endpoint<PVRGPUChild>* aOutEndpoint);
+ void OnXPCOMShutdown();
+ void OnPreferenceChange(const char16_t* aData);
+ void CleanShutdown();
+ void DestroyProcess();
+
+ // 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() = default;
+
+ VRProcessManager* mManager;
+ };
+ friend class Observer;
+
+ RefPtr<Observer> mObserver;
+ VRProcessParent* mProcess;
+ VRChild* mVRChild;
+ // Collects any pref changes that occur during process launch (after
+ // the initial map is passed in command-line arguments) to be sent
+ // when the process can receive IPC messages.
+ nsTArray<mozilla::dom::Pref> mQueuedPrefs;
+};
+
+} // namespace gfx
+} // namespace mozilla
+
+#endif // GFX_VR_PROCESS_MANAGER_H