| // Copyright (c) 2012 The Chromium OS 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 LOGIN_MANAGER_LIVENESS_CHECKER_H_ |
| #define LOGIN_MANAGER_LIVENESS_CHECKER_H_ |
| |
| namespace login_manager { |
| |
| // Provides an interface for classes that ping the browser to see if it's |
| // alive. |
| class LivenessChecker { |
| public: |
| LivenessChecker() {} |
| LivenessChecker(const LivenessChecker&) = delete; |
| LivenessChecker& operator=(const LivenessChecker&) = delete; |
| |
| virtual ~LivenessChecker() {} |
| |
| // Begin sending periodic liveness pings to the browser. |
| virtual void Start() = 0; |
| |
| // Stop sending periodic liveness pings to the browser. |
| // Must be idempotent. |
| virtual void Stop() = 0; |
| |
| // Returns true if this instance has been started and not yet stopped. |
| virtual bool IsRunning() = 0; |
| |
| // Turn off aborting of the browser even if a hang has been detected, to allow |
| // HangWatcher to be the sole detector of hangs. |
| virtual void DisableAborting() = 0; |
| }; |
| } // namespace login_manager |
| |
| #endif // LOGIN_MANAGER_LIVENESS_CHECKER_H_ |