// Copyright 2013 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef SYNC_INTERNAL_API_PUBLIC_BASE_CANCELATION_OBSERVER_H_ #define SYNC_INTERNAL_API_PUBLIC_BASE_CANCELATION_OBSERVER_H_ #include "sync/base/sync_export.h" namespace syncer { // Interface for classes that handle signals from the CancelationSignal. class SYNC_EXPORT CancelationObserver { public: CancelationObserver(); virtual ~CancelationObserver() = 0; // This may be called from a foreign thread while the CancelationSignal's lock // is held. The callee should avoid performing slow or blocking operations. virtual void OnSignalReceived() = 0; }; } // namespace syncer #endif // SYNC_INTERNAL_API_PUBLIC_BASE_CANCELATION_OBSERVER_H_