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More nuance - send back diff

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Nicholas Kariniemi 2015-08-13 22:41:30 +03:00
parent bdc78589ea
commit 30bbfff308
1 changed files with 10 additions and 3 deletions
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13
csp/sync.csp
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@ -1,12 +1,19 @@
N = 3
channel input, up, save:{0..N-1}
channel input, render, up, down, save:{0..N-1}
apply(state, patch) = (state + patch) % N
diff(state1, state2) = (state2 - state1) % N
CLIENT(state, shadow) = input?new_state -> up!diff(shadow, new_state) -> CLIENT(new_state, shadow)
CLIENT(state, shadow) =
input?new_state -> up!diff(shadow, new_state) -> CLIENT(new_state, shadow)
[] down?patch -> if patch != 0
then render!apply(state, patch) -> CLIENT(apply(state, patch), apply(shadow, patch))
else CLIENT(state, state)
SERVER(state, shadow) =
up?patch -> save!apply(state, patch) -> SERVER(apply(state, patch), apply(shadow, patch))
up?patch -> save!apply(state, patch) -> down!diff(apply(shadow, patch), apply(state, patch))
-> SERVER(apply(state, patch), apply(shadow, patch))
SYSTEM = CLIENT(0, 0) ||| SERVER(0, 0)
assert SYSTEM :[deadlock free [F]]