/*
   core/timer.cc
   This file is part of the Osirion project and is distributed under
   the terms and conditions of the GNU General Public License version 2
*/

#include "core/timer.h"

#include <unistd.h>
#include <iostream>
#include <cmath>

namespace core
{

Timer::Timer()
{
	gettimeofday(&this->timer_tick, &this->timer_tz);
	this->timer_elapsed = 0;
}

Timer::~Timer()
{
}

void Timer::mark()
{
	gettimeofday(&timer_tick, &timer_tz);
}

unsigned long Timer::timestamp()
{
	struct timeval tick;
	struct timezone tick_tz;

	gettimeofday(&tick, &tick_tz);

	// calculate elapsed time in 10^-6 seconds
	unsigned long delta = 0;
	delta = tick.tv_sec * 1000 + tick.tv_usec / 1000;
	delta -= timer_tick.tv_sec * 1000 + timer_tick.tv_usec / 1000;
	return delta;
}

float Timer::elapsed()
{
	return ((float) timestamp() / 1000.0f);
}

}