realtimeinit
sets the time unit
realtime
sets the initial datetime and starts the chronometer, or waits until a given datetime
Syntax
realtimeinit(time_unit) realtime(t0) realtime(t)
Arguments
- time_unit
positive decimal number: time unit duration, in seconds.
- t0
decimal number: initial datetime, in
time_unit
. This meaning holds whenrealtime(…)
is called for the first time after the lastrealtimeinit(…)
. This first call sets the datetime origin and restarts the real timer.- t
decimal number: datetime up to which Scilab must wait before performing the next instruction, expressed in time unit.
Description
While sleep(d)
waits for a given fixed duration,
realtime(t)
will wait the required (unknown) time to reach the
given datetime t
.
realtimeinit(time_unit)
defines the time unit in which the
datetime t
specified by realtime
is expressed.
After calling realtimeinit(time_unit)
, the first call to
realtime(t0)
sets the current datetime to t0
,
without any wait. Each new call to realtime(t)
then waits till
datetime t
is reached. If t
is already passed,
no wait is added.
Examples
In the following example, in a loop, a job takes an arbitrary time, from 0 to 1.50 s. This is simulated with a sleep() of random duration. Although this period is not regular, realtime() is used to compensate and print something every 2.00 seconds:
clc tic(); realtimeinit(2.00); realtime(0); for k = 1:10 if k==1, mprintf("\nSleep for Wake-up at Wait until date\n"), end d = rand(1,1); sleep(d*1500); mprintf(' %4.2f s %5.2f s', d*1.5, toc()); realtime(k); mprintf(' %5.2f s\n', toc()); end
Sleep for Wake-up at Wait until date 0.28 s 0.57 s 2.08 s 0.03 s 2.11 s 4.08 s 1.27 s 5.34 s 6.08 s 0.11 s 6.19 s 8.08 s 1.28 s 9.36 s 10.08 s 0.02 s 10.10 s 12.08 s 0.28 s 12.36 s 14.08 s 0.74 s 14.82 s 16.08 s 1.12 s 17.20 s 18.08 s 1.41 s 19.49 s 20.08 s
See also
- sleep — suspend all code executions (console, scripts, callbacks,..)
- getdate — Current datetime or POSIX timestamp from computer's clock. Datetimes from given timestamps
- waitbar — Draw a waitbar
- progressionbar — Draw a progression bar
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