[Chromoting] The desktop process now creates a pre-connected pipe and passes (with some help of the…

remoting/host/desktop_session_agent.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef REMOTING_HOST_DESKTOP_SESSION_AGENT_H_
+#define REMOTING_HOST_DESKTOP_SESSION_AGENT_H_
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "ipc/ipc_listener.h"
+#include "ipc/ipc_platform_file.h"
+
+namespace IPC {
+class ChannelProxy;
+class Message;
+}  // namespace IPC
+
+namespace remoting {
+
+class AutoThreadTaskRunner;
+
+// Provides screen/audio capturing and input injection services for
+// the network process.
+class DesktopSessionAgent : public IPC::Listener {
+ public:
+  static scoped_ptr<DesktopSessionAgent> Create(
+      scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
+      scoped_refptr<AutoThreadTaskRunner> io_task_runner);
+
+  virtual ~DesktopSessionAgent();
+
+  // IPC::Listener implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+  virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
+  virtual void OnChannelError() OVERRIDE;
+
+  // Creates the screen/audio recorders, input stubs and the IPC channel to be
+  // used to access them. Returns a handle of the client end of the IPC channel
+  // pipe to be forwarder to the corresponding desktop environment.
+  bool Start(const base::Closure& done_task,
+             IPC::PlatformFileForTransit* desktop_pipe_out);
+
+ protected:
+  DesktopSessionAgent(
+      scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
+      scoped_refptr<AutoThreadTaskRunner> io_task_runner);
+
+  // Creates a pre-connected IPC channel to be used to access the screen/audio
+  // recorders and input stubs.
+  virtual bool DoCreateNetworkChannel(
+      IPC::PlatformFileForTransit* client_out,
+      scoped_ptr<IPC::ChannelProxy>* server_out) = 0;
+
+  scoped_refptr<AutoThreadTaskRunner> caller_task_runner() const {
+    return caller_task_runner_;
+  }
+
+  scoped_refptr<AutoThreadTaskRunner> io_task_runner() const {
+    return io_task_runner_;
+  }
+
+ private:
+  // Task runner on which public methods of this class should be called.
+  scoped_refptr<AutoThreadTaskRunner> caller_task_runner_;
+
+  // Message loop used by the IPC channel.
+  scoped_refptr<AutoThreadTaskRunner> io_task_runner_;
+
+  // Run on |caller_task_runner_| to notify the caller that |this| has been
+  // stopped.
+  base::Closure done_task_;
+
+  // IPC channel connecting the desktop process with the network process.
+  scoped_ptr<IPC::ChannelProxy> network_channel_;
+
+  DISALLOW_COPY_AND_ASSIGN(DesktopSessionAgent);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_DESKTOP_SESSION_AGENT_H_