1 files changed, 95 insertions, 0 deletions
diff --git a/gfx/vr/ipc/VRProcessManager.h b/gfx/vr/ipc/VRProcessManager.h
new file mode 100644
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+++ b/gfx/vr/ipc/VRProcessManager.h
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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