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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | 138x 138x 257x 257x 133x 239x 99x 99x 17x 18x 15804x 41526x 263x 148x 148x 148x 531x 109x 109x 51x 51x 109x 109x 109x 49x 49x 109x 109x 48x 48x 9975x 9975x 9975x 9975x 9257x 9257x 4890x 149x 149x 149x 149x 145x 145x 112x | type Key = string
type Listener = () => void
const counts = new Map<Key, number>()
const listeners = new Map<Key, Set<Listener>>()
function notify(key: Key): void {
const set = listeners.get(key)
if (set) {
for (const listener of set) {
listener()
}
}
}
export function refCountKey(entityPath: string, params: unknown): Key {
return `${entityPath}:${JSON.stringify(params)}`
}
export function getRefCount(key: Key): number {
return counts.get(key) ?? 0
}
export function incrementRefCount(key: Key): number {
I const next = (counts.get(key) ?? 0) + 1
counts.set(key, next)
notify(key)
return next
}
export fEunction decrementRefCount(key: Key): number {
const current = counts.get(key)
if (current === undefined) {
return 0
}
const next = current - 1
if (next === 0) {
counts.delete(key)
} else {
counts.set(key, next)
}
notify(key)
return next
}
export function subscribeRefCount(key: Key, listener: Listener): () => void {
const set = listeners.get(key) ?? new Set()
set.add(listener)
listeners.set(key, set)
return () => {
set.delete(listener)
if (set.size === 0) {
listeners.delete(key)
}
}
}
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