moments.h

/*
    Copyright 2005-2025  (c) Intel Corporation. All Rights Reserved.

    The source code contained or described herein and all documents related
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    suppliers or licensors.  Title to the Material remains with Intel
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    by worldwide copyright laws and treaty provisions.  No part of the
    Material may be used, copied, reproduced, modified, published, uploaded,
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    No license under any patent, copyright, trade secret or other
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    disclosure or delivery of the Materials, either expressly, by
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*/

#ifndef __TBB_tick_count_H
#define __TBB_tick_count_H
#include <assert.h>
#if _WIN32||_WIN64
#include <windows.h>
#elif __linux__
#include <time.h>
#else /* generic Unix */
#include <sys/time.h>
#endif /* (choice of OS) */

typedef long long moment_t;

inline moment_t moment_now( void )
{
    moment_t result;
#if _WIN32||_WIN64
    LARGE_INTEGER qpcnt;
    QueryPerformanceCounter(&qpcnt);
    result = qpcnt.QuadPart;
#elif __linux__
    struct timespec ts;
    int status = clock_gettime( CLOCK_REALTIME, &ts );
    assert( status == 0 );
    if( status != 0 ) abort();
    result = (long long)1000000000UL*(long long)ts.tv_sec + (long long)ts.tv_nsec;
#else /* generic Unix */
    struct timeval tv;
    int status = gettimeofday(&tv, NULL);
    assert( status == 0 );
    if( status != 0 ) abort();
    result = (long long)1000000*(long long)tv.tv_sec + (long long)tv.tv_usec;
#endif /*(choice of OS) */
    return result;
}

inline moment_t moment_from_seconds( double sec )
{
#if _WIN32||_WIN64
    LARGE_INTEGER qpfreq;
    QueryPerformanceFrequency(&qpfreq);
    return (long long)sec*qpfreq.QuadPart;
#elif __linux__
    return (long long)sec*1E9;
#else /* generic Unix */
    return (long long)sec*1E6;
#endif /* (choice of OS) */
}

inline double seconds_from_moment( moment_t value )
{
#if _WIN32||_WIN64
    LARGE_INTEGER qpfreq;
    QueryPerformanceFrequency(&qpfreq);
    return value/(double)qpfreq.QuadPart;
#elif __linux__
    return value*1E-9;
#else /* generic Unix */
    return value*1E-6;
#endif /* (choice of OS) */
}


#endif /* __TBB_tick_count_H */