src/spu/system/moc_wtime_spu.c

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#include <moc.h>

// if Time-Source is "gettimeofday()" from sys/time.h
// surprisingly this works out of the box. and it seems to be a
// global synchronized time. no internal information how it is
// implemented was found so far, but I think its communicating
// with the PPU because there is no known instance on the SPU
// capable of handling this except the SPU timer library.
// so be carefull using this.
#if defined(MOC_SPU_TIMESOURCE_TIMEOFDAY)
#undef MOC_SPU_TIMESOURCE_SPUTIME

#include <time.h>
#include <sys/time.h>

double MOC_Wtime(void)
    {
    struct timeval time;
    gettimeofday(&time, NULL);
    return ((double) time.tv_sec) + ((double) time.tv_usec)
            / ((double) 1000000.0);
    }

// if Time-Source is the SPU timer library
// this library seems to have prototype-status and its path isn't
// the default. therefore the sputimer-library needs to be explicitly
// linked to any MOC-application.
#elif defined(MOC_SPU_TIMESOURCE_SPUTIME)
#undef MOC_SPU_TIMESOURCE_TIMEOFDAY

#include <spu_mfcio.h>
#include <spu_timer.h>

#define IMOC_TIMEBASE 79800000

char isTimerRunning = 0;

double MOC_Wtime(void)
    {
    if (!isTimerRunning)
        {
        spu_slih_register (MFC_DECREMENTER_EVENT, spu_clock_slih);
        spu_clock_start ();
        isTimerRunning = 1;
        }
    return ((double)spu_clock_read()/((double)IMOC_TIMEBASE));
    }

// if no time-source
// some dummy-functions
#else

double MOC_Wtime(void)
    {
    return 0;
    }

#endif

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