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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef COMPONENTS_SYNC_BASE_CANCELATION_OBSERVER_H_ | 5 #ifndef COMPONENTS_SYNC_BASE_CANCELATION_OBSERVER_H_ |
6 #define COMPONENTS_SYNC_BASE_CANCELATION_OBSERVER_H_ | 6 #define COMPONENTS_SYNC_BASE_CANCELATION_OBSERVER_H_ |
7 | 7 |
8 #include "components/sync/base/sync_export.h" | |
9 | |
10 namespace syncer { | 8 namespace syncer { |
11 | 9 |
12 // Interface for classes that handle signals from the CancelationSignal. | 10 // Interface for classes that handle signals from the CancelationSignal. |
13 class SYNC_EXPORT CancelationObserver { | 11 class CancelationObserver { |
14 public: | 12 public: |
15 CancelationObserver(); | 13 CancelationObserver(); |
16 virtual ~CancelationObserver() = 0; | 14 virtual ~CancelationObserver() = 0; |
17 | 15 |
18 // This may be called from a foreign thread while the CancelationSignal's lock | 16 // This may be called from a foreign thread while the CancelationSignal's lock |
19 // is held. The callee should avoid performing slow or blocking operations. | 17 // is held. The callee should avoid performing slow or blocking operations. |
20 virtual void OnSignalReceived() = 0; | 18 virtual void OnSignalReceived() = 0; |
21 }; | 19 }; |
22 | 20 |
23 } // namespace syncer | 21 } // namespace syncer |
24 | 22 |
25 #endif // COMPONENTS_SYNC_BASE_CANCELATION_OBSERVER_H_ | 23 #endif // COMPONENTS_SYNC_BASE_CANCELATION_OBSERVER_H_ |
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