NAME:
    cputime
 PURPOSE: (one line)
    Return the accumulated user and system times since an arbitrary time.
 DESCRIPTION:
    The overhead in using this procedure is about 3 milliseconds per call.
 CATEGORY:
    Utility
 CALLING SEQUENCE:
    cputime, utime, stime
 INPUTS:

 OPTIONAL INPUT PARAMETERS:

 KEYWORD INPUT PARAMETERS:

 OUTPUTS:
    utime : CPU user time in seconds.
    stime : CPU system time in seconds.
 KEYWORD OUTPUT PARAMETERS:

 COMMON BLOCKS:

 SIDE EFFECTS:

 RESTRICTIONS:

 PROCEDURE:
    The CALL_EXTERNAL function of IDL is used to communicate with a function
  written in C.  This function is cputime.c which, compiled and linked, has
  entry point 'cputime' in the Shareable Object Library file 'cputime.so' in
  /gryll/data1/dwl/idl.
    See /gryll/data1/dwl/idl/cputime.c for further information.
 MODIFICATION HISTORY:
    Written by Doug Loucks, Lowell Observatory, April, 1993.