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      1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef NET_BASE_NETWORK_CHANGE_NOTIFIER_WIN_H_
      6 #define NET_BASE_NETWORK_CHANGE_NOTIFIER_WIN_H_
      7 #pragma once
      8 
      9 #include <windows.h>
     10 
     11 #include "base/basictypes.h"
     12 #include "base/timer.h"
     13 #include "base/win/object_watcher.h"
     14 #include "net/base/network_change_notifier.h"
     15 
     16 namespace net {
     17 
     18 class NetworkChangeNotifierWin : public NetworkChangeNotifier,
     19                                  public base::win::ObjectWatcher::Delegate {
     20  public:
     21   NetworkChangeNotifierWin();
     22 
     23  private:
     24   virtual ~NetworkChangeNotifierWin();
     25 
     26   // NetworkChangeNotifier methods:
     27   virtual bool IsCurrentlyOffline() const;
     28 
     29   // ObjectWatcher::Delegate methods:
     30   virtual void OnObjectSignaled(HANDLE object);
     31 
     32   // Begins listening for a single subsequent address change.
     33   void WatchForAddressChange();
     34 
     35   // Forwards online state notifications to parent class.
     36   void NotifyParentOfOnlineStateChange();
     37 
     38   base::win::ObjectWatcher addr_watcher_;
     39   OVERLAPPED addr_overlapped_;
     40 
     41   base::OneShotTimer<NetworkChangeNotifierWin> timer_;
     42 
     43   DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierWin);
     44 };
     45 
     46 }  // namespace net
     47 
     48 #endif  // NET_BASE_NETWORK_CHANGE_NOTIFIER_WIN_H_
     49