inline nanospan nanotime()
{
#if defined(HAVE_CLOCK_GETTIME_FUNC)
timespec ts;
if ( -1 == clock_gettime(CLOCK_MONOTONIC, &ts) )
return nanospan();
return nanospan(ts.tv_sec, ts.tv_nsec);
#elif defined(HAVE_GETTIMEOFDAY_FUNC)
timeval tv;
::gettimeofday(&tv, 0);
return nanospan(tv.tv_sec, tv.tv_usec*1000L);
#elif defined(HAVE__FTIME_S_FUNC)
struct _timeb timebuffer;
_ftime_s( &timebuffer );
return millispan(static_cast<xsec_t>(timebuffer.time), static_cast<xsec_t>(timebuffer.millitm) );
#elif defined(HAVE__FTIME_FUNC)
struct _timeb timebuffer;
_ftime( &timebuffer );
return millispan(static_cast<xsec_t>(timebuffer.time), static_cast<xsec_t>(timebuffer.millitm) );
#elif defined(HAVE_FTIME_FUNC)
struct timeb timebuffer;
ftime( &timebuffer );
return millispan(static_cast<xsec_t>(timebuffer.time), static_cast<xsec_t>(timebuffer.millitm) );
#else
#error FAIL
#endif //HAVE_CLOCK_GETTIME_FUNC
return nanospan(0, 0);
}
inline nanospan operator * (const nanospan& s, const nanospan& f)
{
if ( f.xsec == 0)
{
xsec_t xsec = s.to_nanosec()*f.sec;
return nanospan(
static_cast<xsec_t> ( xsec / FAS_NANOSEC ),
static_cast<xsec_t> ( xsec % FAS_NANOSEC )
);
}
else
return nanospan( s.to_double() * f.to_double() );
}
inline nanospan operator + (const nanospan& f, const nanospan& s)
{
bool flag = (f.xsec + s.xsec >= FAS_NANOSEC);
return nanospan(
f.sec + s.sec + flag,
f.xsec + s.xsec - flag * FAS_NANOSEC
);
}
inline nanospan operator - (const nanospan& f, const nanospan& s)
{
bool flag = f.xsec < s.xsec;
return nanospan(
f.sec - s.sec - flag,
f.xsec - s.xsec + flag * FAS_NANOSEC
);
}
inline nanospan operator + (const nanospan& f, const nanospan& s)
{
return f.xsec + s.xsec >= FAS_NANOSEC
? nanospan( f.sec + s.sec + 1, f.xsec + s.xsec - FAS_NANOSEC )
: nanospan( f.sec + s.sec, f.xsec + s.xsec );
}
inline nanospan operator - (const nanospan& f, const nanospan& s)
{
return f.xsec < s.xsec
? nanospan( f.sec - s.sec - 1, f.xsec - s.xsec + FAS_NANOSEC )
: nanospan( f.sec - s.sec, f.xsec - s.xsec);
}