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ludic.things: a fact's record kept, in two halves swapped when a fact finds the queue empty

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th_fact made a ThingFact per placement, removal and use, and the valley places and removes Things
all day. The records come back two drains after they were handed out, so a reader placing a Thing
while it reads the last drain's list never sees one change (the test holds exactly that).
thing_use takes ThingsState mut, since it pushes a fact.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-28 12:33:44 +03:00
parent 22d1e2d66a
commit 8a4f3f5ad6
6 changed files with 52 additions and 12 deletions
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15
packages/ludic.things/store.ludic
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@ -26,6 +26,10 @@ export state ThingsState {
th_hs: words = words(0) # things_tick's handles, taken before any tick runs
th_spare: []Thing = new []Thing # removed records, made again oldest first (spare.ludic)
th_spare_at: int = 0
th_fact_a: []ThingFact = new []ThingFact # the facts' records, two halves (th_fact)
th_fact_b: []ThingFact = new []ThingFact
th_fact_n: int = 0
th_fact_on_b: bool = false
}
function th_facts__new() -> Queue<ThingFact> { return queue_new("things.facts") }
@ -45,17 +49,6 @@ export function things_facts(things_st: ThingsState) -> Queue<ThingFact> {
return things_st.th_facts
}
function th_fact(things_st: ThingsState, what: int, t: Thing) -> void {
let f = new ThingFact
f.what = what
f.uid = t.uid
f.kind = t.kind
f.id = t.id
f.owner = t.owner
f.x = t.x
f.z = t.z
q_push(things_facts(things_st), f)
}
# whether a world has been set out (things_clear) since the program began
export function things_ready(things_st: ThingsState) -> bool { return things_st.th.tab != null }