Keep only base/extractor.[cc|h].

base/registry_monitor_manager.h

-// Copyright 2008-2009 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-//
-// The RegistryMonitor allows a caller to request monitoring
-// for registry value changes across multiple keys. It uses the Windows API
-// function RegNotifyChangeKeyValue to notify when any value in a key changes.
-
-#ifndef OMAHA_COMMON_REGISTRY_MONITOR_MANAGER_H_
-#define OMAHA_COMMON_REGISTRY_MONITOR_MANAGER_H_
-
-#include <windows.h>
-#include <atlstr.h>
-#include "base/basictypes.h"
-#include "base/scoped_ptr.h"
-
-namespace omaha {
-
-namespace detail {
-
-class RegistryMonitorImpl;
-
-}  // namespace detail
-
-// Called when a registry value changes. 'new_value_data' contains a
-// pointer to the string data for a string value or the value itself for a
-// DWORD value.
-enum RegistryChangeType {
-  REGISTRY_CHANGE_TYPE_CREATE = 0,
-  REGISTRY_CHANGE_TYPE_UPDATE,
-  REGISTRY_CHANGE_TYPE_DELETE,
-};
-typedef void (*RegistryValueChangeCallback)(const TCHAR* key_name,
-                                            const TCHAR* value_name,
-                                            RegistryChangeType change_type,
-                                            const void* new_value_data,
-                                            void* user_data);
-
-// Called when a registry key changes. Changes include subkeys being
-// created or deleted as well as value changes under that key but not under
-// the subkeys of the key.
-typedef void (*RegistryKeyChangeCallback)(const TCHAR* key_name,
-                                          void* user_data);
-
-class RegistryMonitor {
- public:
-  RegistryMonitor();
-  ~RegistryMonitor();
-
-  HRESULT Initialize();
-
-  // Monitors a registry sub key for changes. Registering the same sub key
-  // overrides the previous registration.
-  HRESULT MonitorKey(HKEY root_key,
-                     const CString& sub_key,
-                     RegistryKeyChangeCallback callback,
-                     void* user_data);
-
-  // Adds a registry value to the list of values to monitor for changes.
-  // All values must be registered before starting monitoring. Registering
-  // the same value is allowed, although not particularly useful.
-  HRESULT MonitorValue(HKEY root_key,
-                       const CString& sub_key,
-                       const CString& value_name,
-                       int value_type,
-                       RegistryValueChangeCallback callback,
-                       void* user_data);
-
-  // Starts monitoring for changes.
-  HRESULT StartMonitoring();
-
- private:
-  scoped_ptr<detail::RegistryMonitorImpl> impl_;
-
-  DISALLOW_EVIL_CONSTRUCTORS(RegistryMonitor);
-};
-
-}  // namespace omaha
-
-#endif  // OMAHA_COMMON_REGISTRY_MONITOR_MANAGER_H_
-