Copyright (C) 1989, Digital Equipment Corporation 
 All rights reserved. 
 See the file COPYRIGHT for a full description. 
 Last modified on Thu Dec  9 09:55:13 PST 1993 by mcjones 
      Modified on Thu Oct 11 22:04:09 1990 by muller 
 Based on the Modula-2+ Time.def, designed by Roy Levin. 

A Time.T represents a moment in time, reckoned as a number of seconds since some epoch or starting point. \index{time!of day} \index{time!Time interface@{\tt Time} interface}



Return the current moment in time.

If a thread performs t0 := Time.Now(); t1 := Time.Now(), then either t1 = t0 or t1 >= t0 + Time.Grain. Grain always lies in the half-open interval (0..1] and is usually no larger than one sixtieth of a second.

END Time.
There are a variety of timekeeping needs, and Time.Now may not satisfy all of them. It is intended to be useful for recording times and measuring intervals arising during the execution of computer programs with a resolution comparable to human reaction times.

The epoch for a Time.T varies from one operating system to another. To determine the epoch, call Date.FromTime(0.0D0, Date.UTC). Note that communicating a Time.T between systems, say via remote procedure call or pickles, is likely to be a bad idea. \index{epoch}

In many computers, Time.Now is implemented with the technology of an inexpensive wristwatch, and is therefore likely to suffer from similar errors: the rate may vary, and the value may be changed by a human operator.

The Thread interface contains procedures that delay the execution of the calling thread for a specified duration. The Tick interface provides access to a clock with subsecond resolution.