Real-Time Programming Languages - Operating Systems

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Example: Operator/Subscriber 01 02 03 04 05 06 07 08 09 01 02 03 04 05 06 07 08 09 10 11 12 13 task body Subscriber is Stuarts_Number : Number; begin --.AD ... An_Op.Directory_Enquiry("STUART JONES", "10 MAIN STREET, YORK", Stuarts_Number); -- phone Stuart --.AD ... end Subscriber; task body Telephone_Operator is begin loop -- prepare to accept next call accept Directory_Enquiry(Person : in Name; Addr : in Address; Num : out Number) do -- look up telephone number and -- assign the value to Num null; --.RM end Directory_Enquiry; -- undertake housekeeping such as logging all calls end loop; end Telephone_Operator; Burns, Wellings Ch. 5.1 Page 80 f. WS 2013/14 Real-Time Systems, Real-Time Prog. Languages / Hermann Härtig 24
In detail task executing Server Client 1 Client 2 accept Request Burns, Wellings Ch. 5.1 Page 82 Server.Request task executing a rendezvous end task suspended accept Request Server.Request data exchange end Time WS 2013/14 Real-Time Systems, Real-Time Prog. Languages / Hermann Härtig 25
Page 1 and 2: Real-Time Systems Hermann Härtig R
Page 3 and 4: RT Language Classes Synchronous HLL
Page 5 and 6: Synchronous Systems → Synchronous
Page 7 and 8: Esterel at a glance Most statements
Page 9 and 10: Esterel „Data“: Variables and S
Page 11 and 12: Signals vs Variables 01 Emit Count(
Page 13 and 14: Examples (all by Berry): ABRO Speci
Page 15 and 16: Speed Specification SPEED: Count th
Page 17 and 18: Few general points Ada has “Annex
Page 19 and 20: Concurrency Tasks ● ● ● ● a
Page 21 and 22: Termination of Tasks Every task has
Page 23: The Rendezvous Based on client/serv
Page 27 and 28: Select Statement ● ● Arbitrary
Page 29 and 30: Example: Resource with Locking 01 0
Page 31 and 32: Tasks ./. Protected Objects 01 02 0
Page 33 and 34: Fixed Priorities ● task (type) T
Page 35 and 36: Active Priority Base priority or
Page 37 and 38: EDF Dispatching How to set deadline
Page 39 and 40: Mixed Scheduling Policies, example
Page 41 and 42: Explicit Request Ordering: Requeue
Page 43 and 44: Timing events 01 02 03 04 05 06 07
Page 45 and 46: Example: Watchdog 01 02 03 04 05 06
Page 47 and 48: Time: Delay Statement 01 02 03 04 0
Page 49 and 50: Delay and Select, client side(1) 01
Page 51 and 52: Example 01 02 03 04 05 06 07 select
Page 53 and 54: Example: Operator/Subscriber 01 02
Page 55 and 56: Example: Operator/Subscriber 01 02
Page 57 and 58: Recurrent Tasks (1) 01 02 03 04 05
Page 59 and 60: Recurrent Tasks (3) Periodic tasks
Page 61 and 62: Example 01 02 03 04 05 06 07 08 09
Page 63 and 64: Example 01 02 03 04 05 06 07 08 09
Page 65 and 66: Missing in this RT-HLL lecture ●

Real-Time Programming Languages - Operating Systems

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