author | wenzelm |
Sat, 03 Sep 2005 16:50:22 +0200 | |
changeset 17244 | 0b2ff9541727 |
parent 14981 | e73f8140af78 |
child 19738 | 1ac610922636 |
permissions | -rw-r--r-- |
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(* Title: HOLCF/IOA/ABP/Receiver.thy |
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ID: $Id$ |
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Author: Olaf Müller |
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*) |
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header {* The implementation: receiver *} |
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theory Receiver |
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imports IOA Action Lemmas |
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begin |
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types |
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'm receiver_state = "'m list * bool" -- {* messages, mode *} |
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constdefs |
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rq :: "'m receiver_state => 'm list" |
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"rq == fst" |
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rbit :: "'m receiver_state => bool" |
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"rbit == snd" |
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receiver_asig :: "'m action signature" |
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"receiver_asig == |
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(UN pkt. {R_pkt(pkt)}, |
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(UN m. {R_msg(m)}) Un (UN b. {S_ack(b)}), |
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{})" |
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receiver_trans :: "('m action, 'm receiver_state)transition set" |
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"receiver_trans == |
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{tr. let s = fst(tr); |
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t = snd(snd(tr)) |
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in |
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case fst(snd(tr)) |
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of |
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Next => False | |
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S_msg(m) => False | |
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R_msg(m) => (rq(s) ~= []) & |
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m = hd(rq(s)) & |
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rq(t) = tl(rq(s)) & |
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rbit(t)=rbit(s) | |
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S_pkt(pkt) => False | |
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R_pkt(pkt) => if (hdr(pkt) ~= rbit(s))&rq(s)=[] then |
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rq(t) = (rq(s)@[msg(pkt)]) &rbit(t) = (~rbit(s)) else |
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rq(t) =rq(s) & rbit(t)=rbit(s) | |
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S_ack(b) => b = rbit(s) & |
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rq(t) = rq(s) & |
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rbit(t)=rbit(s) | |
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R_ack(b) => False}" |
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receiver_ioa :: "('m action, 'm receiver_state)ioa" |
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"receiver_ioa == |
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(receiver_asig, {([],False)}, receiver_trans,{},{})" |
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ML {* use_legacy_bindings (the_context ()) *} |
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end |