codekingpro/portable-devtools

1'use strict'
2
3const { kConnected, kSize } = require('../../core/symbols')
4
5class CompatWeakRef {
6  constructor (value) {
7    this.value = value
8  }
9
10  deref () {
11    return this.value[kConnected] === 0 && this.value[kSize] === 0
12      ? undefined
13      : this.value
14  }
15}
16
17class CompatFinalizer {
18  constructor (finalizer) {
19    this.finalizer = finalizer
20  }
21
22  register (dispatcher, key) {
23    if (dispatcher.on) {
24      dispatcher.on('disconnect', () => {
25        if (dispatcher[kConnected] === 0 && dispatcher[kSize] === 0) {
26          this.finalizer(key)
27        }
28      })
29    }
30  }
31
32  unregister (key) {}
33}
34
35module.exports = function () {
36  // FIXME: remove workaround when the Node bug is backported to v18
37  // https://github.com/nodejs/node/issues/49344#issuecomment-1741776308
38  if (process.env.NODE_V8_COVERAGE && process.version.startsWith('v18')) {
39    process._rawDebug('Using compatibility WeakRef and FinalizationRegistry')
40    return {
41      WeakRef: CompatWeakRef,
42      FinalizationRegistry: CompatFinalizer
43    }
44  }
45  return { WeakRef, FinalizationRegistry }
46}
47