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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 | 49x 49x 72x 72x 49x 85x 99x 99x 17x 18x 4436x 11713x 179x 42x 42x 42x 279x 30x 51x 51x 51x 51x 30x 30x 49x 49x 30x 30x 48x 48x 2840x 2840x 2840x 2840x 2608x 2608x 1538x 65x 65x 65x 65x 61x 61x 60x | 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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