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core: Phase 4 — move future-done?/future-cancelled? to the overlay

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Pure reads of the future's :cached/:cancelled slots over future? + get.
future? stays native (deref/future-cancel/realized? call it), as do future-call
and future-cancel (OS threads). Covered by the existing futures spec.
This commit is contained in:
Yogthos 2026-06-07 21:41:11 -04:00
parent a9403e26b0
commit 790f54d2b3
2 changed files with 10 additions and 6 deletions
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8
jolt-core/clojure/core/20-coll.clj
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@ -293,3 +293,11 @@
(jolt.host/ref-put! vol :val newval) newval)
(defn vswap! [vol f & args]
(vreset! vol (apply f (get vol :val) args)))
;; Future status predicates — pure reads of the future's :cached/:cancelled slots.
;; future? stays native (deref/future-cancel/realized? call it); future-call and
;; future-cancel stay native too (OS threads).
(defn future-done? [x]
(if (future? x) (boolean (get x :cached)) (throw "future-done? requires a future")))
(defn future-cancelled? [x]
(and (future? x) (boolean (get x :cancelled))))