CWE-ou-minkata/Sources/Plasma/NucleusLib/pnUtils/pnUtTime.cpp

/*==LICENSE==*

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*==LICENSE==*/
#include "pnUtTime.h"

#if HS_BUILD_FOR_UNIX
#include <time.h>
#include <sys/time.h>
#endif

/******************************************************************************
 * I've combined all the pnUtils Time stuff in here and made it work cross-
 * platform as best as possible.
 *
 * At some point, hsTimer needs to be rewritten to ensure that it's fully
 * corss-platform and using a reliable millisecond clock.
 * When that happens, these functions should be merged into hsTimer.
 *
 * -- dpogue (April 14, 2012)
 *
 *****************************************************************************/

namespace pnUtilsExe {

uint32_t TimeGetTickCount () {
#if HS_BUILD_FOR_WIN32
    return GetTickCount();
#else
    struct timeval tv;
    if (gettimeofday(&tv, NULL) != 0)
        return 0;

    return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
#endif
}

/*****************************************************************************
*
*   Time adjustment functions
*
*   For debug builds, adjust the initial time value so that the high
*   bit or the time value itself is about to wrap, to catch application
*   bugs that don't handle wrapping or depend on the high bit's value.
*
***/

static uint32_t s_adjustment;

//===========================================================================
static void InitializeAdjustment () {
    ASSERT(!s_adjustment);
    uint32_t currTime  = TimeGetTickCount();
    uint32_t startBits = (currTime & 0x80) ? 0x7fff0000 : 0xffff0000;
    uint32_t startMask = 0xffff0000;
    s_adjustment = (((currTime & ~startMask) | startBits) - currTime) | 1;
    ASSERT(s_adjustment);
}

//===========================================================================
AUTO_INIT_FUNC(AutoInitializeAdjustment) {
    if (!s_adjustment)
        InitializeAdjustment();
}

} using namespace pnUtilsExe;


/*****************************************************************************
*
*   Exports
*
***/

uint32_t TimeGetSecondsSince2001Utc () {
    uint64_t time    = TimeGetTime();
    uint32_t seconds = (uint32_t)((time - kTime1601To2001) / kTimeIntervalsPerSecond);
    return seconds;
}

uint64_t TimeGetTime () {
#ifdef HS_BUILD_FOR_WIN32
    uint64_t time;
    static_assert(sizeof(uint64_t) == sizeof(FILETIME), "FILETIME is not a uint64");
    GetSystemTimeAsFileTime((FILETIME *) &time);
    return time;
#else
    struct timespec ts;
    if (clock_gettime(CLOCK_MONOTONIC, &ts))
        return 0;

    long long time = ts.tv_sec * 1000000000LL + ts.tv_nsec;

    return time / 100;
#endif
}

uint32_t TimeGetMs () {
#ifdef HS_DEBUGGING
    // For debug builds, return an adjusted timer value
    if (!s_adjustment)
        InitializeAdjustment();
    return TimeGetTickCount() + s_adjustment;
#else
    // For release builds, just return the operating system's timer
    return TimeGetTickCount();
#endif
}