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clay: document [wick] invariant

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This commit is contained in:
Philip Monk 2022-11-17 17:30:06 -07:00
parent 3ec3516ccb
commit 54c2b652e5
1 changed files with 22 additions and 2 deletions
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24
pkg/arvo/sys/vane/clay.hoon
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@ -1844,7 +1844,7 @@
%+ roll ~(tap in kel)
|: [weft=*weft wic=wic.dom]
(~(put by wic) weft yoki)
=? ..park !?=(%base syd) wick
=? ..park !?=(%base syd) wick :: [wick]
%- (slog leaf+"clay: wait-for-kelvin, {<[need=zuse/zuse have=kel]>}" ~)
:: call +tare to notify that there's a new commit-in-waiting
::
@ -1876,6 +1876,20 @@
:: changing state, we may need to call +wake, +goad, etc, which
:: happens at the end of the function.
::
:: [wick] if this commit added compatibility to a future kelvin,
:: then we might have unblocked a kelvin upgrade.
::
:: or, if *this* is a kelvin upgrade, it's possible that another
:: kelvin upgrade will immediately be ready. for example, this
:: could be the case if all desks but one are ready for the next
:: two kelvins, and then that desk is suspended or receives a
:: commit with compatiblity with both kelvins.
::
:: in any of these cases, we finish the current commit but call
:: +wick so that we try to execute the kelvin upgrade afterward.
:: we want this commit to persist even if the subsequent kelvin
:: upgrade fails.
::
=. ..park wick
=. wic.dom
%+ roll ~(tap in kel)
@ -3179,6 +3193,10 @@
::
:: Try to apply highest-versioned %base commit-in-waiting
::
:: [wick] Must be called whenever we might have unblocked a kelvin
:: upgrade. This is move-order agnostic because it defers the
:: upgrade into a new event.
::
++ wick
^+ ..park
(emit hen %pass /wick %b %wait now)
@ -4966,12 +4984,14 @@
%wick
=^ mos ruf
=/ den ((de now rof hen ruf) our %base)
abet:wick:den
abet:wick:den :: [wick]
[mos ..^$]
::
%zest
=^ m1 ruf
=/ den ((de now rof hen ruf) our des.req)
:: [wick] could be suspending the last blocking desk
::
abet:wick:(set-zest:den liv.req)
=^ m2 ruf abet:goad:(lu now rof hen ruf)
[(weld m1 m2) ..^$]