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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef SYNC_INTERNAL_API_PUBLIC_BASE_CANCELATION_OBSERVER_H_ | |
6 #define SYNC_INTERNAL_API_PUBLIC_BASE_CANCELATION_OBSERVER_H_ | |
7 | |
8 #include "sync/base/sync_export.h" | |
9 | |
10 namespace syncer { | |
11 | |
12 // Interface for classes that handle signals from the CancelationSignal. | |
13 class SYNC_EXPORT CancelationObserver { | |
14 public: | |
15 CancelationObserver(); | |
16 virtual ~CancelationObserver() = 0; | |
17 | |
18 // 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. | |
20 virtual void OnSignalReceived() = 0; | |
21 }; | |
22 | |
23 } // namespace syncer | |
24 | |
25 #endif // SYNC_INTERNAL_API_PUBLIC_BASE_CANCELATION_OBSERVER_H_ | |
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