MercuryTime.h

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// This file is part of the MercuryDPM project (https://www.mercurydpm.org).
// Copyright (c), The MercuryDPM Developers Team. All rights reserved.
// License: BSD 3-Clause License; see the LICENSE file in the root directory.
 
#ifndef TIME_H
#define TIME_H
 
#include <ctime>
#include <ctime>
#include <cstring>
#include <sstream>
#include <chrono>
#include <cmath>
#include "GeneralDefine.h"
#include "Logger.h"
 
class Time
{
public:
    
    Time () {
        tic();
        start = 0;
        finish = 0;
    }
    
    void tic()
    {
        start = clock(); //clock tics
        wallClockStart = std::chrono::high_resolution_clock::now();
    }
    
    Mdouble toc()
    {
        finish = clock();
        wallClockFinish = std::chrono::high_resolution_clock::now();
        return getWallTime();
    }
    
    Mdouble getCPUTime() const
    {
        return (Mdouble(finish) - Mdouble(start)) / CLOCKS_PER_SEC;
    }
    
    Mdouble getWallTime()
    {
        return std::chrono::duration<double>(wallClockFinish-wallClockStart).count();
    }
 
    Mdouble toctic()
    {
        Mdouble tocTime = toc();
        start = finish;
        return tocTime;
    }
    
private:
    clock_t start;
    std::chrono::time_point<std::chrono::high_resolution_clock> wallClockStart;
    
    clock_t finish;
    std::chrono::time_point<std::chrono::high_resolution_clock> wallClockFinish;
};
 
class Time2Finish
{
public:
    
    Time2Finish(Mdouble t, Mdouble tMax)
    {
        startTime_ = clock();
        time_ = t;
        timeMax_ = tMax;
    }
    
    Mdouble getTime2Finish(Mdouble t)
    {
        clock_t finish = clock();
        Mdouble elapsedTime = (Mdouble(finish) - Mdouble(startTime_)) / CLOCKS_PER_SEC;
        
        if (fabs(time_ - t) < 1.e-9)
        {
            logger(WARN, "Choose an other value for t");
            return 0;
        }
        else
        {
            Mdouble time2Finish = elapsedTime * (timeMax_ - time_) / (t - time_);
            startTime_ = finish;
            time_ = t;
            return time2Finish;
        }
    }
    
    std::string getFinishTime(Mdouble t)
    {
        // gets the estimated time left to finish.
        Mdouble time2Finish = getTime2Finish(t);
        
        // adds to the estimated time to current time and also type-casting Mdouble to time_t.
        time_t finish = time(nullptr) + time2Finish;
        
        std::stringstream ss;
        
        //write estimated end time
        ss << ctime(&finish);
        
        //decrement put pointer by one to avoid line break
        ss.seekp((long) ss.tellp() - 1);
        
        //write time to finish
        ss << " (" << time2Finish / 3600 << "h)";
        return ss.str();
    }
 
private:
    clock_t startTime_;
    
    Mdouble time_;
    
    Mdouble timeMax_;
    
};
 
#endif