Function dr_get_microseconds 

pub unsafe extern "C" fn dr_get_microseconds() -> uint64

Returns the number of microseconds since Jan 1, 1601 (this is the current UTC time).

\note This is the Windows standard. UNIX time functions typically count from the Epoch (Jan 1, 1970). The Epoch is 1164447360010001000 microseconds after Jan 1, 1601.