time_point.cc

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/*!
 *
 * Copyright (C) 2015 Technical University of Liberec.  All rights reserved.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 3 as published by the
 * Free Software Foundation. (http://www.gnu.org/licenses/gpl-3.0.en.html)
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * 
 * @file    time_point.cc
 * @brief   
 */
 
//#include <iostream>
//#include <stdio.h>
//#include <stdlib.h>
//#include <string>
//#include <time.h>
 
//#include "config.h"
#include "time_point.hh"
#include <type_traits>  // for enable_if<>::type
 
/**
 * Include either Windows or chrono lib
 */
#ifdef FLOW123D_HAVE_TIMER_QUERY_PERFORMANCE_COUNTER
#include <windows.h>
#else
#include <chrono>
#endif //FLOW123D_HAVE_TIMER_CHRONO_HIGH_RESOLUTION
 
using namespace std;
 
 
#ifdef FLOW123D_HAVE_TIMER_QUERY_PERFORMANCE_COUNTER
 
    #include <windows.h>
 
    TimePoint::TimePoint () {
        LARGE_INTEGER time;
        QueryPerformanceCounter (&time);
        this->ticks = time.QuadPart;
    }
 
 
    // initialize static frequency when using QueryPerformanceCounter
    LARGE_INTEGER TimePoint::get_frequency () {
        LARGE_INTEGER frequency;
        QueryPerformanceFrequency(&frequency);
        return frequency;
    }
    LARGE_INTEGER TimePoint::frequency = TimePoint::get_frequency ();
 
 
    double TimePoint::operator- (const TimePoint &right) {
        double difference = this->ticks - right.ticks;
        return difference / (TimePoint::frequency.QuadPart);
    }
 
 
#else
 
    #include <chrono>
 
 
    TimePoint::TimePoint () {
        chrono::time_point<chrono::high_resolution_clock> time = chrono::high_resolution_clock::now ();
        this->ticks = chrono::duration_cast<std::chrono::nanoseconds> (time.time_since_epoch ()).count ();
    }
 
 
    double TimePoint::operator- (const TimePoint &right) {
        double difference = this->ticks - right.ticks;
        return difference / (1 * 1000 * 1000 * 1000);
    }
 
#endif //FLOW123D_HAVE_TIMER_CHRONO_HIGH_RESOLUTION