Stopwatch.h

/*
 *  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 <chrono>
#include <stdint.h>

class CStopWatch
{
public:
  CStopWatch() = default;
  ~CStopWatch() = default;

  inline bool IsRunning() const
  {
    return m_isRunning;
  }

  inline void StartZero()
  {
    m_startTick = std::chrono::steady_clock::now();
    m_isRunning = true;
  }

  inline void Start()
  {
    if (!m_isRunning)
      StartZero();
  }

  inline void Stop()
  {
    if(m_isRunning)
    {
      m_stopTick = std::chrono::steady_clock::now();
      m_isRunning = false;
    }
  }

  void Reset()
  {
    if (m_isRunning)
      m_startTick = std::chrono::steady_clock::now();
    else
      m_startTick = m_stopTick;
  }

  float GetElapsedSeconds() const
  {
    std::chrono::duration<float> elapsed;

    if (m_isRunning)
      elapsed = std::chrono::steady_clock::now() - m_startTick;
    else
      elapsed = m_stopTick - m_startTick;

    return elapsed.count();
  }

  float GetElapsedMilliseconds() const
  {
    std::chrono::duration<float, std::milli> elapsed;

    if (m_isRunning)
      elapsed = std::chrono::steady_clock::now() - m_startTick;
    else
      elapsed = m_stopTick - m_startTick;

    return elapsed.count();
  }

private:
  std::chrono::time_point<std::chrono::steady_clock> m_startTick;
  std::chrono::time_point<std::chrono::steady_clock> m_stopTick;
  bool m_isRunning = false;
};