Introducing remoting::Stoppable helper base class implementing asynchronous shutdown on a specific t

remoting/host/wts_session_process_launcher_win.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_WTS_SESSION_PROCESS_LAUNCHER_WIN_H_
 #define REMOTING_HOST_WTS_SESSION_PROCESS_LAUNCHER_WIN_H_
 
 #include <windows.h>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "base/win/scoped_handle.h"
 #include "base/win/object_watcher.h"
 #include "ipc/ipc_channel.h"
-
+#include "remoting/base/shutdownable.h"
 #include "remoting/host/wts_console_observer_win.h"
 
 namespace base {
-class MessageLoopProxy;
+class SingleThreadTaskRunner;
 } // namespace base
 
 namespace IPC {
 class ChannelProxy;
 class Message;
 } // namespace IPC
 
 namespace remoting {
 
 // Session id that does not represent any session.
 extern const uint32 kInvalidSessionId;
 
 class SasInjector;
 class WtsConsoleMonitor;
 
 class WtsSessionProcessLauncher
-    : public base::win::ObjectWatcher::Delegate,
+    : public Shutdownable,
+      public base::win::ObjectWatcher::Delegate,
       public IPC::Listener,
       public WtsConsoleObserver {
  public:
   // Constructs a WtsSessionProcessLauncher object. |host_binary| is the name of
   // the executable to be launched in the console session. All interaction with
   // |monitor| should happen on |main_message_loop|. |ipc_message_loop| has
   // to be an I/O message loop.
   WtsSessionProcessLauncher(
+      const Shutdownable::Callback& done,

[Sergey Ulanov, 2012/07/30 19:46:22]

done_callback?

[alexeypa (please no reviews), 2012/07/30 20:41:43]

I called it |stopped_callback|

       WtsConsoleMonitor* monitor,
       const FilePath& host_binary,
-      scoped_refptr<base::MessageLoopProxy> main_message_loop,
-      scoped_refptr<base::MessageLoopProxy> ipc_message_loop);
+      scoped_refptr<base::SingleThreadTaskRunner> main_message_loop,
+      scoped_refptr<base::SingleThreadTaskRunner> ipc_message_loop);
 
   virtual ~WtsSessionProcessLauncher();
 
   // base::win::ObjectWatcher::Delegate implementation.
   virtual void OnObjectSignaled(HANDLE object) OVERRIDE;
 
   // IPC::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // WtsConsoleObserver implementation.
   virtual void OnSessionAttached(uint32 session_id) OVERRIDE;
   virtual void OnSessionDetached() OVERRIDE;
 
+ protected:
+  // Shutdownable implementation.
+  virtual void DoShutdown() OVERRIDE;
+
  private:
   // Attempts to launch the host process in the current console session.
   // Schedules next launch attempt if creation of the process fails for any
   // reason.
   void LaunchProcess();
 
   // Sends the Secure Attention Sequence to the session represented by
   // |session_token_|.
   void OnSendSasToConsole();
 
   // Name of the host executable.
   FilePath host_binary_;
 
   // Time of the last launch attempt.
   base::Time launch_time_;
 
   // Current backoff delay.
   base::TimeDelta launch_backoff_;
 
   // Timer used to schedule the next attempt to launch the process.
   base::OneShotTimer<WtsSessionProcessLauncher> timer_;
 
   // The main service message loop.
-  scoped_refptr<base::MessageLoopProxy> main_message_loop_;
+  scoped_refptr<base::SingleThreadTaskRunner> main_message_loop_;
 
   // Message loop used by the IPC channel.
-  scoped_refptr<base::MessageLoopProxy> ipc_message_loop_;
+  scoped_refptr<base::SingleThreadTaskRunner> ipc_message_loop_;
 
   // This pointer is used to unsubscribe from session attach and detach events.
   WtsConsoleMonitor* monitor_;
 
   // Impersonation token that has the SE_TCB_NAME privilege enabled.
   base::win::ScopedHandle privileged_token_;
 
   // The handle of the process injected into the console session.
   base::Process process_;
 
@@ skipping 18 matching lines @@
   scoped_ptr<IPC::ChannelProxy> chromoting_channel_;
 
   scoped_ptr<SasInjector> sas_injector_;
 
   DISALLOW_COPY_AND_ASSIGN(WtsSessionProcessLauncher);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_WTS_SESSION_PROCESS_LAUNCHER_WIN_H_