timers.c

#include "Python.h"

/* The following timer code comes from Python 2.5.2's _lsprof.c */

#if !defined(HAVE_LONG_LONG)
#error "This module requires long longs!"
#endif

/*** Selection of a high-precision timer ***/

#ifdef MS_WINDOWS

#include <windows.h>

PY_LONG_LONG
hpTimer(void)
{
        LARGE_INTEGER li;
        QueryPerformanceCounter(&li);
        return li.QuadPart;
}

double
hpTimerUnit(void)
{
        LARGE_INTEGER li;
        if (QueryPerformanceFrequency(&li))
                return 1.0 / li.QuadPart;
        else
                return 0.000001;  /* unlikely */
}

#else  /* !MS_WINDOWS */

#ifndef HAVE_GETTIMEOFDAY
#error "This module requires gettimeofday() on non-Windows platforms!"
#endif

#if (defined(PYOS_OS2) && defined(PYCC_GCC))
#include <sys/time.h>
#else
#include <sys/resource.h>
#include <sys/times.h>
#endif

PY_LONG_LONG
hpTimer(void)
{
        struct timeval tv;
        PY_LONG_LONG ret;
#ifdef GETTIMEOFDAY_NO_TZ
        gettimeofday(&tv);
#else
        gettimeofday(&tv, (struct timezone *)NULL);
#endif
        ret = tv.tv_sec;
        ret = ret * 1000000 + tv.tv_usec;
        return ret;
}

double
hpTimerUnit(void)
{
        return 0.000001;
}

#endif  /* MS_WINDOWS */