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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_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 OnChannelError() override;
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
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