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      1 // Copyright (c) 2012 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_CONFIG_WATCHER_MAC_H_
      6 #define NET_BASE_NETWORK_CONFIG_WATCHER_MAC_H_
      7 
      8 #include <SystemConfiguration/SCDynamicStore.h>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/mac/scoped_cftyperef.h"
     12 #include "base/memory/scoped_ptr.h"
     13 
     14 namespace base {
     15 class Thread;
     16 }
     17 
     18 namespace net {
     19 
     20 // Helper class for watching the Mac OS system network settings.
     21 class NetworkConfigWatcherMac {
     22  public:
     23   // NOTE: The lifetime of Delegate is expected to exceed the lifetime of
     24   // NetworkConfigWatcherMac.
     25   class Delegate {
     26    public:
     27     virtual ~Delegate() {}
     28 
     29     // Called to let the delegate do any setup work the must be run on the
     30     // notifier thread immediately after it starts.
     31     virtual void Init() {}
     32 
     33     // Called to start receiving notifications from the SCNetworkReachability
     34     // API.
     35     // Will be called on the notifier thread.
     36     virtual void StartReachabilityNotifications() = 0;
     37 
     38     // Called to register the notification keys on |store|.
     39     // Implementors are expected to call SCDynamicStoreSetNotificationKeys().
     40     // Will be called on the notifier thread.
     41     virtual void SetDynamicStoreNotificationKeys(SCDynamicStoreRef store) = 0;
     42 
     43     // Called when one of the notification keys has changed.
     44     // Will be called on the notifier thread.
     45     virtual void OnNetworkConfigChange(CFArrayRef changed_keys) = 0;
     46   };
     47 
     48   explicit NetworkConfigWatcherMac(Delegate* delegate);
     49   ~NetworkConfigWatcherMac();
     50 
     51  private:
     52   // The thread used to listen for notifications.  This relays the notification
     53   // to the registered observers without posting back to the thread the object
     54   // was created on.
     55   scoped_ptr<base::Thread> notifier_thread_;
     56 
     57   DISALLOW_COPY_AND_ASSIGN(NetworkConfigWatcherMac);
     58 };
     59 
     60 }  // namespace net
     61 
     62 #endif  // NET_BASE_NETWORK_CONFIG_WATCHER_MAC_H_
     63