win32/timer.cpp

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/*
 *  RPLIDAR SDK
 *
 *  Copyright (c) 2009 - 2014 RoboPeak Team
 *  http://www.robopeak.com
 *  Copyright (c) 2014 - 2020 Shanghai Slamtec Co., Ltd.
 *  http://www.slamtec.com
 *
 */
/*
 * 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,
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 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
 
#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/=1000ULL;
    assert(ans);
}
 
_u64 getHDTimer_us()
{
    LARGE_INTEGER current;
    QueryPerformanceCounter(&current);
 
    return (_u64)(current.QuadPart / (_current_freq.QuadPart/1000ULL));
 
}
 
_u64 getHDTimer()
{
    LARGE_INTEGER current;
    QueryPerformanceCounter(&current);
 
    return (_u64)(current.QuadPart/_current_freq.QuadPart);
}
 
BEGIN_STATIC_CODE(timer_cailb)
{
    HPtimer_reset();
}END_STATIC_CODE(timer_cailb)
 
}}