96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/***********************************************************************
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** Copyright (C) 2019 LP-Research
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** All rights reserved.
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** Contact: LP-Research (info@lp-research.com)
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**
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** This file is part of the Open Motion Analysis Toolkit (OpenMAT).
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**
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** Redistribution and use in source and binary forms, with
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** or without modification, are permitted provided that the
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** following conditions are met:
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**
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** Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#include "MicroMeasure.h"
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#include <sys/time.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <assert.h>
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static const unsigned usec_per_sec = 1000000;
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static const unsigned usec_per_msec = 1000;
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bool QueryPerformanceFrequency(long long *frequency)
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{
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*frequency = (long long)usec_per_sec;
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return true;
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}
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bool QueryPerformanceCounter(long long *performance_count)
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{
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struct timeval time;
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assert(performance_count != NULL);
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gettimeofday(&time, NULL);
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*performance_count = time.tv_usec + time.tv_sec * (long long)usec_per_sec;
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return true;
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}
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MicroMeasure::MicroMeasure()
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{
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long long ticksPerSecond;
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QueryPerformanceFrequency(&ticksPerSecond);
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tpm = ticksPerSecond;
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start_time = 0LL;
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}
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void MicroMeasure::reset(void)
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{
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long long tick;
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QueryPerformanceCounter(&tick);
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start_time = tick;
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}
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long long MicroMeasure::measure(void)
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{
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long long tick;
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QueryPerformanceCounter(&tick);
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return (((tick - start_time) * 1000LL * 1000LL) / tpm);
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}
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void MicroMeasure::sleep(long long s_t)
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{
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reset();
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while (measure() < s_t)
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{
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}
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}
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