mirror of
https://github.com/ilyakooo0/urbit.git
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458 lines
12 KiB
Plaintext
458 lines
12 KiB
Plaintext
:: %behn, just a timer
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!:
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!? 164
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::
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=, behn
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|= pit=vase
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=> |%
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+$ move [p=duct q=(wite note gift:able)]
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+$ note :: out request $->
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$~ [%b %wait *@da] ::
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$% $: %b :: to self
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$>(%wait task:able) :: set timer
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== ::
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$: %d :: to %dill
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$>(%flog task:able:dill) :: log output
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== == ::
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+$ sign
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$~ [%b %wake ~]
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$% [%b $>(%wake gift:able)]
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==
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::
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+$ behn-state
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$: %2
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timers=(tree [key=@da val=(qeu duct)])
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unix-duct=duct
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next-wake=(unit @da)
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drips=drip-manager
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==
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::
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++ timer-map ((ordered-map ,@da ,(qeu duct)) lte)
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::
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+$ drip-manager
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$: count=@ud
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movs=(map @ud vase)
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==
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::
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+$ timer [date=@da =duct]
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--
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::
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=>
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~% %behn ..is ~
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|%
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++ per-event
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=| moves=(list move)
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|= [[our=ship now=@da =duct] state=behn-state]
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::
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|%
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:: %entry-points
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::
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:: +born: urbit restarted; refresh :next-wake and store wakeup timer duct
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::
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++ born set-unix-wake(next-wake.state ~, unix-duct.state duct)
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:: +crud: handle failure of previous arvo event
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::
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++ crud
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|= [tag=@tas error=tang]
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^+ [moves state]
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:: behn must get activated before other vanes in a %wake
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::
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?. =(%wake tag)
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~& %behn-crud-not-wake^tag
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[[duct %slip %d %flog %crud tag error]~ state]
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::
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?: =(~ timers.state)
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~|(%behn-crud-no-timer^tag^error !!)
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::
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(wake `error)
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:: +rest: cancel the timer at :date, then adjust unix wakeup
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:: +wait: set a new timer at :date, then adjust unix wakeup
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::
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++ rest |=(date=@da set-unix-wake(timers.state (unset-timer [date duct])))
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++ wait |=(date=@da set-unix-wake(timers.state (set-timer [date duct])))
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:: +huck: give back immediately
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::
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:: Useful if you want to continue working after other moves finish.
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::
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++ huck
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|= syn=sign-arvo
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=< [moves state]
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event-core(moves [duct %give %heck syn]~)
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:: +drip: XX
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::
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++ drip
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|= mov=vase
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=< [moves state]
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^+ event-core
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=. moves
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[duct %pass /drip/(scot %ud count.drips.state) %b %wait +(now)]~
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=. movs.drips.state
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(~(put by movs.drips.state) count.drips.state mov)
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=. count.drips.state +(count.drips.state)
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event-core
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:: +take-drip: XX
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::
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++ take-drip
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|= [num=@ud error=(unit tang)]
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=< [moves state]
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^+ event-core
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=/ drip (~(got by movs.drips.state) num)
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=. movs.drips.state (~(del by movs.drips.state) num)
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=/ =move
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=/ card [%give %meta drip]
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?~ error
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[duct card]
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=/ =tang
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(weld u.error `tang`[leaf/"drip failed" ~])
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:: XX should be
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:: [duct %hurl fail/tang card]
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::
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[duct %pass /drip-slog %d %flog %crud %drip-fail tang]
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event-core(moves [move moves])
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:: +trim: in response to memory pressue
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::
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++ trim [moves state]
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:: +vega: learn of a kernel upgrade
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::
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++ vega [moves state]
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:: +wake: unix says wake up; process the elapsed timer and set :next-wake
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::
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++ wake
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|= error=(unit tang)
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^+ [moves state]
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:: no-op on spurious but innocuous unix wakeups
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::
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?: =(~ timers.state)
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~? ?=(^ error) %behn-wake-no-timer^u.error
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[moves state]
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:: if we errored, pop the timer and notify the client vane of the error
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::
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?^ error
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=< set-unix-wake
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=^ =timer timers.state pop-timer
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(emit-vane-wake duct.timer error)
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:: if unix woke us too early, retry by resetting the unix wakeup timer
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::
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=/ [=timer later-timers=_timers.state] pop-timer
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?: (gth date.timer now)
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set-unix-wake(next-wake.state ~)
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:: pop first timer, tell vane it has elapsed, and adjust next unix wakeup
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::
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=< set-unix-wake
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(emit-vane-wake(timers.state later-timers) duct.timer ~)
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:: %utilities
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::
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::+|
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::
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++ event-core .
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:: +emit-vane-wake: produce a move to wake a vane; assumes no prior moves
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::
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++ emit-vane-wake
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|= [=^duct error=(unit tang)]
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event-core(moves [duct %give %wake error]~)
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:: +emit-doze: set new unix wakeup timer in state and emit move to unix
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::
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:: We prepend the unix %doze event so that it is handled first. Arvo must
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:: handle this first because the moves %behn emits will get handled in
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:: depth-first order. If we're handling a %wake which causes a move to a
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:: different vane and a %doze event to send to unix, Arvo needs to process
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:: the %doze first because otherwise if the move to the other vane calls
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:: back into %behn and emits a second %doze, the second %doze would be
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:: handled by unix first which is incorrect.
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::
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++ emit-doze
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|= =date=(unit @da)
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^+ event-core
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:: no-op if .unix-duct has not yet been set
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::
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?~ unix-duct.state
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event-core
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:: make sure we don't try to wake up in the past
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::
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=? date-unit ?=(^ date-unit) `(max now u.date-unit)
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::
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%_ event-core
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next-wake.state date-unit
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moves [[unix-duct.state %give %doze date-unit] moves]
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==
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:: +set-unix-wake: set or unset next unix wakeup timer based on :i.timers
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::
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++ set-unix-wake
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=< [moves state]
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~% %set-unix-wake ..is ~ |-
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^+ event-core
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::
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=* next-wake next-wake.state
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=* timers timers.state
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:: if no timers, cancel existing wakeup timer or no-op
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::
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=/ first=(unit [date=@da *]) (peek:timer-map timers.state)
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?~ first
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?~ next-wake
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event-core
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(emit-doze ~)
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:: if :next-wake is in the past or not soon enough, reset it
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::
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?^ next-wake
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?: &((gte date.u.first u.next-wake) (lte now u.next-wake))
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event-core
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(emit-doze `date.u.first)
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:: there was no unix wakeup timer; set one
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::
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(emit-doze `date.u.first)
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:: +pop-timer: dequeue and produce earliest timer
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::
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++ pop-timer
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^+ [*timer timers.state]
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=^ [date=@da dux=(qeu ^duct)] timers.state (pop:timer-map timers.state)
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=^ dut dux ~(get to dux)
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:- [date dut]
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?: =(~ dux)
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timers.state
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(put:timer-map timers.state date dux)
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:: +set-timer: set a timer, maintaining order
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::
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++ set-timer
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~% %set-timer ..is ~
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|= t=timer
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^+ timers.state
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=/ found (find-ducts date.t)
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(put:timer-map timers.state date.t (~(put to found) duct.t))
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:: +find-ducts: get timers at date
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::
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:: TODO: move to +ordered-map
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::
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++ find-ducts
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|= date=@da
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^- (qeu ^duct)
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?~ timers.state ~
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?: =(date key.n.timers.state)
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val.n.timers.state
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?: (lte date key.n.timers.state)
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$(timers.state l.timers.state)
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$(timers.state r.timers.state)
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:: +unset-timer: cancel a timer; if it already expired, no-op
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::
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++ unset-timer
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|= t=timer
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^+ timers.state
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=/ [found=? dux=(qeu ^duct)]
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=/ dux (find-ducts date.t)
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|- ^- [found=? dux=(qeu ^duct)]
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?~ dux |+~
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?: =(duct.t n.dux) &+~(nip to `(qeu ^duct)`dux)
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=^ found-left=? l.dux $(dux l.dux)
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?: found-left &+dux
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=^ found-rite=? r.dux $(dux r.dux)
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[found-rite dux]
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?. found timers.state
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?: =(~ dux)
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+:(del:timer-map timers.state date.t)
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(put:timer-map timers.state date.t dux)
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--
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--
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::
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=| behn-state
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=* state -
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|= [our=ship now=@da eny=@uvJ rof=roof]
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=* behn-gate .
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^?
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|%
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:: +call: handle a +task:able:behn request
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::
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++ call
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~% %behn-call ..is ~
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|= $: hen=duct
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dud=(unit goof)
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type=*
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wrapped-task=(hobo task:able)
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==
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^- [(list move) _behn-gate]
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::
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=/ =task:able ((harden task:able) wrapped-task)
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::
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:: error notifications "downcast" to %crud
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::
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=? task ?=(^ dud)
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~| %crud-in-crud
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?< ?=(%crud -.task)
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[%crud -.task tang.u.dud]
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::
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=/ event-core (per-event [our now hen] state)
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::
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=^ moves state
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?- -.task
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%born born:event-core
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%crud (crud:event-core [p q]:task)
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%rest (rest:event-core date=p.task)
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%drip (drip:event-core move=p.task)
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%huck (huck:event-core syn.task)
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%trim trim:event-core
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%vega vega:event-core
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%wait (wait:event-core date=p.task)
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%wake (wake:event-core error=~)
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==
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[moves behn-gate]
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:: +load: migrate an old state to a new behn version
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::
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++ load
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|^
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|= old=state
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^+ behn-gate
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=? old ?=(^ -.old)
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(ket-to-1 old)
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=? old ?=(~ -.old)
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(load-0-to-1 old)
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=? old ?=(%1 -.old)
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(load-1-to-2 old)
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?> ?=(%2 -.old)
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behn-gate(state old)
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::
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++ state
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$^ behn-state-ket
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$% behn-state-0
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behn-state-1
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behn-state
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==
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::
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++ load-1-to-2
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|= old=behn-state-1
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^- behn-state
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=; new-timers old(- %2, timers new-timers)
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=/ timers=(list timer) ~(tap in ~(key by timers.old))
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%+ roll timers
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|= [t=timer acc=(tree [@da (qeu duct)])]
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^+ acc
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=| mock=behn-state
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=. timers.mock acc
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=/ event-core (per-event *[@p @da duct] mock)
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(set-timer:event-core t)
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::
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++ timer-map-1
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%- (ordered-map ,timer ,~)
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|= [a=timer b=timer]
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(lth date.a date.b)
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::
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+$ behn-state-1
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$: %1
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timers=(tree [timer ~])
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unix-duct=duct
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next-wake=(unit @da)
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drips=drip-manager
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==
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::
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+$ behn-state-0
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$: ~
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unix-duct=duct
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next-wake=(unit @da)
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drips=drip-manager
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==
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::
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+$ behn-state-ket
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$: timers=(list timer)
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unix-duct=duct
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next-wake=(unit @da)
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drips=drip-manager
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==
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::
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++ ket-to-1
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|= old=behn-state-ket
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^- behn-state-1
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:- %1
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%= old
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timers
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%+ gas:timer-map-1 *(tree [timer ~])
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(turn timers.old |=(=timer [timer ~]))
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==
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::
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++ load-0-to-1
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|= old=behn-state-0
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^- behn-state-1
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[%1 old]
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--
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:: +scry: view timer state
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::
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:: TODO: not referentially transparent w.r.t. elapsed timers,
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:: which might or might not show up in the product
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::
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++ scry
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|= [lyc=gang cyr=term bem=beam]
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^- (unit (unit cage))
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=* ren cyr
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=* why=shop &/p.bem
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=* syd q.bem
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=* lot=coin $/r.bem
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=* tyl s.bem
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::
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::TODO don't special-case whey scry
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::
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?: &(=(ren %$) =(tyl /whey))
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=/ maz=(list mass)
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:~ timers+&+timers.state
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==
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``mass+!>(maz)
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:: only respond for the local identity, %$ desk, current timestamp
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::
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?. ?& =(&+our why)
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=([%$ %da now] lot)
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=(%$ syd)
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==
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~
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:: /bx/debug/timers (list [@da duct]) all timers and their ducts
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:: /bx/timers (list @da) all timer timestamps
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:: /bx/timers/next (unit @da) the very next timer to fire
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:: /bx/timers/[da] (list @da) all timers up to and including da
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::
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?. ?=(%x ren) ~
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?+ tyl [~ ~]
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[%debug %timers ~]
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:^ ~ ~ %noun
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!> ^- (list [@da duct])
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%- zing
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%+ turn (tap:timer-map timers)
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|= [date=@da q=(qeu duct)]
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%+ turn ~(tap to q)
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|=(d=duct [date d])
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::
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[%timers ~]
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:^ ~ ~ %noun
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!> ^- (list @da)
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%- zing
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%+ turn (tap:timer-map timers)
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|= [date=@da q=(qeu duct)]
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(reap ~(wyt in q) date)
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::
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[%timers %next ~]
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:^ ~ ~ %noun
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!> ^- (unit @da)
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(bind (peek:timer-map timers) head)
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::
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[%timers @ ~]
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?~ til=(slaw %da i.t.tyl)
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[~ ~]
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:^ ~ ~ %noun
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!> ^- (list @da)
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=/ tiz=(list [date=@da q=(qeu duct)])
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(tap:timer-map timers)
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|- ^- (list @da)
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?~ tiz ~
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?: (gth date.i.tiz u.til) ~
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%+ weld
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(reap ~(wyt in q.i.tiz) date.i.tiz)
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$(tiz t.tiz)
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==
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::
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++ stay state
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++ take
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|= [tea=wire hen=duct dud=(unit goof) hin=(hypo sign)]
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^- [(list move) _behn-gate]
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?^ dud
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~|(%behn-take-dud (mean tang.u.dud))
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::
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?> ?=([%drip @ ~] tea)
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=/ event-core (per-event [our now hen] state)
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=^ moves state
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(take-drip:event-core (slav %ud i.t.tea) error.q.hin)
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[moves behn-gate]
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--
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