timetaker.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
#pragma once
 
#include <string>
#include "irrlichttypes.h"
 
enum TimePrecision : s8
{
        PRECISION_SECONDS,
        PRECISION_MILLI,
        PRECISION_MICRO,
        PRECISION_NANO,
};
 
constexpr const char *TimePrecision_units[] = {
        "s"  /* PRECISION_SECONDS */,
        "ms" /* PRECISION_MILLI */,
        "us" /* PRECISION_MICRO */,
        "ns" /* PRECISION_NANO */,
};
 
/*
        TimeTaker
*/
 
// Note: this class should be kept lightweight
 
class TimeTaker
{
public:
        TimeTaker(const std::string &name, u64 *result = nullptr,
                TimePrecision prec = PRECISION_MILLI)
        {
                if (result)
                        m_result = result;
                else
                        m_name = name;
                m_precision = prec;
                start();
        }
 
        ~TimeTaker()
        {
                stop();
        }
 
        u64 stop(bool quiet=false);
 
        u64 getTimerTime();
 
private:
        void start();
 
        std::string m_name;
        u64 *m_result = nullptr;
        u64 m_time1;
        bool m_running = true;
        TimePrecision m_precision;
};