blob: b23f396f38d1b8f25f04f8716ad3278f985c9ecb (
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
|
// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --expose-gc --noincremental-marking
let cleanup_call_count = 0;
let cleanup_holdings_count = 0;
let cleanup = function(holdings) {
assertEquals("holdings", holdings);
++cleanup_holdings_count;
++cleanup_call_count;
}
let fg = new FinalizationRegistry(cleanup);
let key = {"k": "this is the key"};
// Create an object and register it in the FinalizationRegistry. The object needs
// to be inside a closure so that we can reliably kill them!
(function() {
let object = {};
fg.register(object, "holdings", key);
// object goes out of scope.
})();
// This GC will reclaim the target object and schedule cleanup.
gc();
assertEquals(0, cleanup_call_count);
// Assert that the cleanup function was called.
let timeout_func = function() {
assertEquals(1, cleanup_call_count);
assertEquals(1, cleanup_holdings_count);
// Unregister an already cleaned-up weak reference.
let success = fg.unregister(key);
assertFalse(success);
// Assert that it didn't do anything.
setTimeout(() => { assertEquals(1, cleanup_call_count); }, 0);
setTimeout(() => { assertEquals(1, cleanup_holdings_count); }, 0);
}
setTimeout(timeout_func, 0);
|