StopWatch.cpp

/*
 *   Copyright (C) 2015,2016,2018 by Jonathan Naylor G4KLX
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   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.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "StopWatch.h"
#include <cstdio>
#include <ctime>

CStopWatch::CStopWatch() :
m_startMS(0ULL)
{
}

CStopWatch::~CStopWatch()
{
}

unsigned long long CStopWatch::time() const
{
	struct timeval now;
	::gettimeofday(&now, NULL);

	return now.tv_sec * 1000ULL + now.tv_usec / 1000ULL;
}

unsigned long long CStopWatch::start()
{
	struct timespec now;
	::clock_gettime(CLOCK_MONOTONIC, &now);

	m_startMS = now.tv_sec * 1000ULL + now.tv_nsec / 1000000ULL;

	return m_startMS;
}

unsigned int CStopWatch::elapsed()
{
	struct timespec now;
	::clock_gettime(CLOCK_MONOTONIC, &now);

	unsigned long long nowMS = now.tv_sec * 1000ULL + now.tv_nsec / 1000000ULL;

	return nowMS - m_startMS;
}