minetest/src/util/timetaker.cpp

/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "timetaker.h"

#include "../porting.h"
#include "../log.h"
#include <ostream>

TimeTaker::TimeTaker(const std::string &name, u64 *result, TimePrecision prec)
{
	m_name = name;
	m_result = result;
	m_running = true;
	m_precision = prec;
	m_time1 = porting::getTime(prec);
}

u64 TimeTaker::stop(bool quiet)
{
	if (m_running) {
		u64 dtime = porting::getTime(m_precision) - m_time1;
		if (m_result != NULL) {
			(*m_result) += dtime;
		} else {
			if (!quiet) {
				static const char* const units[] = {
					"s"  /* PRECISION_SECONDS */,
					"ms" /* PRECISION_MILLI */,
					"us" /* PRECISION_MICRO */,
					"ns" /* PRECISION_NANO */,
				};
				infostream << m_name << " took "
				           << dtime << units[m_precision]
					   << std::endl;
			}
		}
		m_running = false;
		return dtime;
	}
	return 0;
}

u64 TimeTaker::getTimerTime()
{
	return porting::getTime(m_precision) - m_time1;
}