dispatcher-weakref.js•1.08 kB
'use strict'
const { kConnected, kSize } = require('../../core/symbols')
class CompatWeakRef {
constructor (value) {
this.value = value
}
deref () {
return this.value[kConnected] === 0 && this.value[kSize] === 0
? undefined
: this.value
}
}
class CompatFinalizer {
constructor (finalizer) {
this.finalizer = finalizer
}
register (dispatcher, key) {
if (dispatcher.on) {
dispatcher.on('disconnect', () => {
if (dispatcher[kConnected] === 0 && dispatcher[kSize] === 0) {
this.finalizer(key)
}
})
}
}
unregister (key) {}
}
module.exports = function () {
// FIXME: remove workaround when the Node bug is backported to v18
// https://github.com/nodejs/node/issues/49344#issuecomment-1741776308
if (process.env.NODE_V8_COVERAGE && process.version.startsWith('v18')) {
process._rawDebug('Using compatibility WeakRef and FinalizationRegistry')
return {
WeakRef: CompatWeakRef,
FinalizationRegistry: CompatFinalizer
}
}
return { WeakRef, FinalizationRegistry }
}