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/*
* Copyright (C) 2005-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#pragma once
#include <stdint.h>
class CStopWatch
{
public:
explicit CStopWatch(bool useFrameTime=false);
~CStopWatch();
/*!
\brief Retrieve the running state of the stopwatch.
\return True if stopwatch has been started but not stopped.
*/
inline bool IsRunning() const
{
return m_isRunning;
}
/*!
\brief Record start time and change state to running.
*/
inline void StartZero()
{
m_startTick = GetTicks();
m_isRunning = true;
}
/*!
\brief Record start time and change state to running, only if the stopwatch is stopped.
*/
inline void Start()
{
if (!m_isRunning)
StartZero();
}
/*!
\brief Record stop time and change state to not running.
*/
inline void Stop()
{
if(m_isRunning)
{
m_stopTick = GetTicks();
m_isRunning = false;
}
}
/*!
\brief Set the start time such that time elapsed is now zero.
*/
void Reset()
{
if (m_isRunning)
m_startTick = GetTicks();
else
m_startTick = m_stopTick;
}
/*!
\brief Retrieve time elapsed between the last call to Start(), StartZero()
or Reset() and; if running, now; if stopped, the last call to Stop().
\return Elapsed time, in seconds, as a float.
*/
float GetElapsedSeconds() const
{
int64_t totalTicks = (m_isRunning ? GetTicks() : m_stopTick) - m_startTick;
return (float)totalTicks * m_timerPeriod;
}
/*!
\brief Retrieve time elapsed between the last call to Start(), StartZero()
or Reset() and; if running, now; if stopped, the last call to Stop().
\return Elapsed time, in milliseconds, as a float.
*/
float GetElapsedMilliseconds() const
{
return GetElapsedSeconds() * 1000.0f;
}
private:
int64_t GetTicks() const;
float m_timerPeriod; // to save division in GetElapsed...()
int64_t m_startTick;
int64_t m_stopTick;
bool m_isRunning;
bool m_useFrameTime;
};
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