1 02/05/82  clock_
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 3 
 4 Entry points in clock_:
 5    (List is generated by the help command)
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 7 
 8 :Entry: clock_:  01/28/82  clock_
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10 
11 Function: reads the system clock and returns a fixed binary number
12 equal to the number of microseconds since 0000 hours Greenwich mean
13 time January 1, 1901.  The returned time is suitable for input to the
14 date_time_ or decode_clock_value_ subroutines, which convert the clock
15 reading to an ASCII representation.
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18 Syntax:
19 declare clock_ entry returns (fixed bin(71));
20 date_time = clock_ ();
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22 
23 Arguments:
24 date_time
25    is the number of microseconds since January 1, 1901, 0000 hours
26    Greenwich mean time.  (Output)
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29 Notes:  The clock PL/I builtin function should be used in PL/I programs
30 instead of this subroutine, because it is more efficient.