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Real-Time Programming Languages - Operating Systems

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Example: Watchdog<br />

01<br />

02<br />

03<br />

04<br />

05<br />

06<br />

07<br />

08<br />

09<br />

10<br />

11<br />

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task type Watchdog is<br />

entry All_Is_Well;<br />

end Watchdog;<br />

task body Watchdog is<br />

begin<br />

loop<br />

select<br />

accept All_Is_Well;<br />

or<br />

delay 10.0;<br />

-- signal alarm, potentially the client has failed<br />

exit;<br />

end select;<br />

end loop;<br />

-- any further required action<br />

end Watchdog;<br />

Burns,<br />

Wellings<br />

Ch. 6.3<br />

Page 104<br />

WS 2013/14 <strong>Real</strong>-<strong>Time</strong> <strong>Systems</strong>, <strong>Real</strong>-<strong>Time</strong> Prog. <strong>Languages</strong> / Hermann Härtig 52

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