Peter Qiu | c0beca5 | 2015-09-03 11:25:46 -0700 | [diff] [blame^] | 1 | // |
| 2 | // Copyright (C) 2014 The Android Open Source Project |
| 3 | // |
| 4 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | // you may not use this file except in compliance with the License. |
| 6 | // You may obtain a copy of the License at |
| 7 | // |
| 8 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | // |
| 10 | // Unless required by applicable law or agreed to in writing, software |
| 11 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | // See the License for the specific language governing permissions and |
| 14 | // limitations under the License. |
| 15 | // |
Paul Stewart | 0153cf0 | 2014-06-02 11:53:36 -0700 | [diff] [blame] | 16 | |
Ben Chan | c45688b | 2014-07-02 23:50:45 -0700 | [diff] [blame] | 17 | #ifndef SHILL_PROPERTY_OBSERVER_INTERFACE_H_ |
| 18 | #define SHILL_PROPERTY_OBSERVER_INTERFACE_H_ |
Paul Stewart | 0153cf0 | 2014-06-02 11:53:36 -0700 | [diff] [blame] | 19 | |
Ben Chan | cc67c52 | 2014-09-03 07:19:18 -0700 | [diff] [blame] | 20 | #include <base/macros.h> |
Paul Stewart | 0153cf0 | 2014-06-02 11:53:36 -0700 | [diff] [blame] | 21 | |
| 22 | namespace shill { |
| 23 | |
| 24 | // An abstract interface for objects that retain a saved copy of |
| 25 | // a property accessor and can report whether that value has changed. |
| 26 | class PropertyObserverInterface { |
| 27 | public: |
| 28 | PropertyObserverInterface() {} |
| 29 | virtual ~PropertyObserverInterface() {} |
| 30 | |
| 31 | // Update the saved value used for comparison. |
| 32 | virtual void Update() = 0; |
| 33 | |
| 34 | private: |
| 35 | DISALLOW_COPY_AND_ASSIGN(PropertyObserverInterface); |
| 36 | }; |
| 37 | |
| 38 | } // namespace shill |
| 39 | |
Ben Chan | c45688b | 2014-07-02 23:50:45 -0700 | [diff] [blame] | 40 | #endif // SHILL_PROPERTY_OBSERVER_INTERFACE_H_ |