timer.cpp

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/*
 * Copyright (c) 2014, RoboPeak
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, 
 *    this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 */
/*
 *  RoboPeak LIDAR System
 *  High Resolution Timer Impl on Win32
 *
 *  Copyright 2009 - 2014 RoboPeak Team
 *  http://www.robopeak.com
 * 
 */

#include "sdkcommon.h"
#include <mmsystem.h>
#pragma comment(lib, "Winmm.lib")

namespace rp{ namespace arch{

static LARGE_INTEGER _current_freq;

void HPtimer_reset()
{
    BOOL ans=QueryPerformanceFrequency(&_current_freq);
    _current_freq.QuadPart/=1000;
}

_u32 getHDTimer()
{
    LARGE_INTEGER current;
    QueryPerformanceCounter(&current);

    return (_u32)(current.QuadPart/_current_freq.QuadPart);
}

BEGIN_STATIC_CODE(timer_cailb)
{
    HPtimer_reset();
}END_STATIC_CODE(timer_cailb)

}}