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 CONTENT_BROWSER_RENDERER_HOST_INPUT_TIMEOUT_MONITOR_H_ 6 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_TIMEOUT_MONITOR_H_ 7 8 #include "base/basictypes.h" 9 #include "base/callback.h" 10 #include "base/time/time.h" 11 #include "base/timer/timer.h" 12 #include "content/common/content_export.h" 13 14 namespace content { 15 16 // Utility class for handling a timeout callback with periodic starts and stops. 17 class CONTENT_EXPORT TimeoutMonitor { 18 public: 19 typedef base::Closure TimeoutHandler; 20 21 explicit TimeoutMonitor(const TimeoutHandler& timeout_handler); 22 ~TimeoutMonitor(); 23 24 // Schedule the timeout timer to fire at |delay| into the future. If a timeout 25 // has already been scheduled, reschedule only if |delay| is sooner than the 26 // currently scheduled timeout time. 27 void Start(base::TimeDelta delay); 28 29 void Restart(base::TimeDelta delay); 30 void Stop(); 31 bool IsRunning() const; 32 33 private: 34 void CheckTimedOut(); 35 36 TimeoutHandler timeout_handler_; 37 38 // Indicates a time in the future when we would consider the input as 39 // having timed out, if it does not receive an appropriate stop request. 40 base::Time time_when_considered_timed_out_; 41 42 // This timer runs to check if |time_when_considered_timed_out_| has past. 43 base::OneShotTimer<TimeoutMonitor> timeout_timer_; 44 45 DISALLOW_COPY_AND_ASSIGN(TimeoutMonitor); 46 }; 47 48 } // namespace content 49 50 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_TIMEOUT_MONITOR_H_ 51
