Created
November 3, 2016 16:12
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TLA+ Channel
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| INIT | |
| Init | |
| NEXT | |
| Next | |
| INVARIANT | |
| TypeOK | |
| CONSTANTS | |
| Data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 } |
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| ---- MODULE Chan ---- | |
| EXTENDS Integers, TLC | |
| CONSTANT Data | |
| VARIABLE chan | |
| TypeOK == chan \in [val: Data, rdy: {0,1}, ack: {0,1}] | |
| Init == /\ TypeOK | |
| /\ chan.ack = chan.rdy | |
| Tx(d) == /\ chan.rdy = chan.ack | |
| /\ chan' = [chan EXCEPT !.val = d, !.rdy = 1 - @] | |
| Rx == /\ chan.rdy /= chan.ack | |
| /\ chan' = [chan EXCEPT !.ack = 1 - @] | |
| Next == (\E d \in Data : Tx(d)) \/ Rx | |
| Spec == Init /\ [][Next]_chan | |
| ---- | |
| THEOREM Spec => []TypeOK | |
| ==== |
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