(timeGetTime): Ditto.
(timeBeginPeriod): Ditto.
(timeEndPeriod): Ditto.
* hires.h (hires_base): New class. Renamed from hires.
(hires_us): New class.
(hires_ms): New class.
* strace.cc (strace::microseconds): Use hires_us class.
* times.cc (gettimeofday): Use hires-ms class.
(hires_us::prime): Renamed from hires::prime.
(hires_us::usecs): Renamed from hires:usecs.
(hires_ms::prime): New method.
(hires_ms::usecs): New method.
(hires_ms::~hires_ms): New destructor.