task ALARM is
entry AWAKE;
task body ALARM is
begin
loop
select
accept AWAKE;
or
delay 50.0;
SIGNAL_ALARM;
end select;
end loop;
end ALARM;
The above code shows that whether an operator is awake or not. If the operator is awake, then the AWAKE button is pressed every 50 sec. if not, the after a delay of 50 seconds, an ALARM will be sounded indicating the operator is away or AWAKE button is not pressed.
If the operator pressing the AWAKE button at 0 seconds or even at 49 seconds, the SIGNAL_ALARM procedure wont be executed at all. because the AWAKE button should be pressed once every 50 sec.
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