1 files changed, 86 insertions, 0 deletions
diff --git a/gfx/vr/ipc/VRProcessParent.h b/gfx/vr/ipc/VRProcessParent.h
new file mode 100644
index 0000000000..181ecec30f
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+++ b/gfx/vr/ipc/VRProcessParent.h
@@ -0,0 +1,86 @@
+/* -*- 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_PARENT_H
+#define GFX_VR_PROCESS_PARENT_H
+
+#include "mozilla/UniquePtr.h"
+
+#include "mozilla/ipc/GeckoChildProcessHost.h"
+#include "mozilla/ipc/TaskFactory.h"
+
+namespace mozilla {
+namespace ipc {
+class SharedPreferenceSerializer;
+}
+namespace gfx {
+
+class VRChild;
+
+class VRProcessParent final : public mozilla::ipc::GeckoChildProcessHost {
+ public:
+  class Listener {
+   public:
+    virtual void OnProcessLaunchComplete(VRProcessParent* aParent) {}
+
+    // Follow GPU and RDD process manager, adding this to avoid
+    // unexpectedly shutdown or had its connection severed.
+    // This is not called if an error occurs after calling Shutdown().
+    virtual void OnProcessUnexpectedShutdown(VRProcessParent* aParent) {}
+  };
+
+  explicit VRProcessParent(Listener* aListener);
+
+  // Launch the subprocess asynchronously. On failure, false is returned.
+  // Otherwise, true is returned, and the OnProcessLaunchComplete listener
+  // callback will be invoked either when a connection has been established, or
+  // if a connection could not be established due to an asynchronous error.
+  bool Launch();
+  // If the process is being launched, block until it has launched and
+  // connected. If a launch task is pending, it will fire immediately.
+  //
+  // Returns true if the process is successfully connected; false otherwise.
+  bool WaitForLaunch();
+  void Shutdown();
+  void DestroyProcess();
+  bool CanShutdown() override { return true; }
+
+  void OnChannelConnected(base::ProcessId peer_pid) override;
+  void OnChannelConnectedTask();
+  void OnChannelErrorTask();
+  void OnChannelClosed();
+  bool IsConnected() const;
+
+  base::ProcessId OtherPid();
+  VRChild* GetActor() const { return mVRChild.get(); }
+  // Return a unique id for this process, guaranteed not to be shared with any
+  // past or future instance of VRProcessParent.
+  uint64_t GetProcessToken() const;
+
+ private:
+  ~VRProcessParent();
+
+  DISALLOW_COPY_AND_ASSIGN(VRProcessParent);
+
+  bool InitAfterConnect(bool aSucceeded);
+  void KillHard(const char* aReason);
+
+  RefPtr<VRChild> mVRChild;
+  mozilla::ipc::TaskFactory<VRProcessParent> mTaskFactory;
+  nsCOMPtr<nsIThread> mLaunchThread;
+  Listener* mListener;
+
+  enum class LaunchPhase { Unlaunched, Waiting, Complete };
+  LaunchPhase mLaunchPhase;
+  bool mChannelClosed;
+  bool mShutdownRequested;
+  UniquePtr<mozilla::ipc::SharedPreferenceSerializer> mPrefSerializer;
+};
+
+}  // namespace gfx
+}  // namespace mozilla
+
+#endif  // ifndef GFX_VR_PROCESS_PARENT_H