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// 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 CONTENT_BROWSER_RENDERER_HOST_INPUT_TIMEOUT_MONITOR_H_
#define CONTENT_BROWSER_RENDERER_HOST_INPUT_TIMEOUT_MONITOR_H_
#include "base/callback.h"
#include "base/macros.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "content/common/content_export.h"
namespace content {
// Utility class for handling a timeout callback with periodic starts and stops.
class CONTENT_EXPORT TimeoutMonitor {
public:
typedef base::Closure TimeoutHandler;
explicit TimeoutMonitor(const TimeoutHandler& timeout_handler);
~TimeoutMonitor();
// Schedule the timeout timer to fire at |delay| into the future. If a timeout
// has already been scheduled, reschedule only if |delay| is sooner than the
// currently scheduled timeout time.
void Start(base::TimeDelta delay);
void Restart(base::TimeDelta delay);
void Stop();
bool IsRunning() const;
private:
void StartImpl(base::TimeDelta delay);
void CheckTimedOut();
TimeoutHandler timeout_handler_;
// Indicates a time in the future when we would consider the input as
// having timed out, if it does not receive an appropriate stop request.
base::TimeTicks time_when_considered_timed_out_;
// This timer runs to check if |time_when_considered_timed_out_| has past.
base::OneShotTimer timeout_timer_;
DISALLOW_COPY_AND_ASSIGN(TimeoutMonitor);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_TIMEOUT_MONITOR_H_
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