chrome_frame/registry_watcher.h

   1 // Copyright (c) 2011 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 // A utility class that makes it easy to register for registry change
   6 // notifications.
   7 //
   8
   9 #ifndef CHROME_FRAME_REGISTRY_WATCHER_H_
  10 #define CHROME_FRAME_REGISTRY_WATCHER_H_
  11
  12 #include <windows.h>
  13
  14 class RegistryWatcher {
  15  public:
  16   typedef void (*NotifyFunc)();
  17   RegistryWatcher(HKEY hive, const wchar_t* path, NotifyFunc callback);
  18   ~RegistryWatcher();
  19
  20   bool StartWatching();
  21   void StopWatching();
  22
  23  private:
  24   static void CALLBACK WaitCallback(void* param, BOOLEAN wait_fired);
  25
  26   HKEY registry_key_;
  27
  28   HANDLE wait_event_;
  29   HANDLE wait_handle_;
  30   bool stopping_;
  31
  32   NotifyFunc callback_;
  33 };
  34
  35
  36 #endif  // CHROME_FRAME_REGISTRY_WATCHER_H_