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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 | 63x 63x 146x 146x 75x 133x 99x 99x 17x 18x 7122x 18699x 243x 84x 84x 84x 471x 62x 62x 51x 51x 62x 62x 62x 49x 49x 62x 62x 48x 48x 4490x 4490x 4490x 4490x 4157x 4157x 2102x 129x 129x 129x 129x 125x 125x 92x | 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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