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// Copyright 2016 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_BASE_STOP_WATCH_H_
#define COBALT_BASE_STOP_WATCH_H_
#include "base/time/time.h"
namespace base {
class StopWatchOwner;
class StopWatch {
public:
enum AutoStart {
kAutoStartOn,
kAutoStartOff,
};
StopWatch(int id, AutoStart auto_start, StopWatchOwner* owner);
~StopWatch();
void Start();
void Stop();
bool IsCounting() const;
private:
int id_;
StopWatchOwner* owner_;
base::TimeTicks start_time_;
};
class StopWatchOwner {
protected:
virtual ~StopWatchOwner() {}
private:
virtual bool IsStopWatchEnabled(int id) const = 0;
virtual void OnStopWatchStopped(int id, base::TimeDelta time_elapsed) = 0;
friend class StopWatch;
};
} // namespace base
#endif // COBALT_BASE_STOP_WATCH_H_