/***********************************************************************
** Copyright (C) 2013 LP-Research
** All rights reserved.
** Contact: LP-Research (info@lp-research.com)
**
** This file is part of the Open Motion Analysis Toolkit (OpenMAT).
**
** Redistribution and use in source and binary forms, with 
** or without modification, are permitted provided that the 
** following conditions are met:
**
** Redistributions of source code must retain the above copyright 
** notice, this list of conditions and the following disclaimer.
** Redistributions in binary form must reproduce the above copyright 
** notice, this list of conditions and the following disclaimer in 
** the documentation and/or other materials provided with the 
** distribution.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
** HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
***********************************************************************/

#include <windows.h>

#include "MicroMeasure.h"

MicroMeasure::MicroMeasure()
{
    LARGE_INTEGER ticksPerSecond;

    QueryPerformanceFrequency(&ticksPerSecond);

    tpm = ticksPerSecond.QuadPart;

    start_time = 0;
}

void MicroMeasure::reset(void)
{
    LARGE_INTEGER tick;

    QueryPerformanceCounter(&tick);
    start_time = tick.QuadPart;
}

long long MicroMeasure::measure(void)
{
    LARGE_INTEGER tick;

    QueryPerformanceCounter(&tick);

    return (((tick.QuadPart - start_time) * 1000 * 1000) / tpm);
}

void MicroMeasure::sleep(long long s_t)
{
    reset();

    while (measure() < s_t)
    {
    }
}