#import #import CFAbsoluteTime MTAbsoluteSystemTime() { static mach_timebase_info_data_t s_timebase_info; if (s_timebase_info.denom == 0) mach_timebase_info(&s_timebase_info); return ((CFAbsoluteTime)(mach_absolute_time() * s_timebase_info.numer)) / (s_timebase_info.denom * NSEC_PER_SEC); }