blob: 8bd4cac309d39f9a2a173b8035156f71f3a2859b (
plain)
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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/**
* maybeGarbageCollectAsync
*
* It might garbage collect, it might not. If it doesn't, that's ok.
*/
self.maybeGarbageCollectAsync = garbageCollect;
/**
* maybeGarbageCollectKeptObjectsAsync
*
* Based on "asyncGCDeref" in https://github.com/tc39/test262/blob/master/harness/async-gc.js
*
* @return {Promise} Resolves to a trigger if ClearKeptObjects
* exists to provide one
*/
async function maybeGarbageCollectKeptObjectsAsync() {
let trigger;
if (typeof ClearKeptObjects === 'function') {
trigger = ClearKeptObjects();
}
await maybeGarbageCollectAsync();
return trigger;
}
/**
* maybeGarbageCollectAndCleanupAsync
*
* Based on "asyncGC" in https://github.com/tc39/test262/blob/master/harness/async-gc.js
*
* @return {undefined}
*/
async function maybeGarbageCollectAndCleanupAsync(...targets) {
let finalizationRegistry = new FinalizationRegistry(() => {});
let length = targets.length;
for (let target of targets) {
finalizationRegistry.register(target, 'target');
target = null;
}
targets = null;
await 'tick';
await maybeGarbageCollectKeptObjectsAsync();
let names = [];
finalizationRegistry.cleanupSome(name => names.push(name));
if (names.length !== length) {
throw maybeGarbageCollectAndCleanupAsync.NOT_COLLECTED;
}
}
maybeGarbageCollectAndCleanupAsync.NOT_COLLECTED = Symbol('Object was not collected');
/**
* resolveGarbageCollection
*
* Based on "resolveAsyncGC" in https://github.com/tc39/test262/blob/master/harness/async-gc.js
*
* @param {Error} error An error object.
* @return {undefined}
*/
function resolveGarbageCollection(error) {
if (error && error !== maybeGarbageCollectAndCleanupAsync.NOT_COLLECTED) {
throw error;
}
}
|
