The Tor Browser / file comparison
comparison: addon-sdk/source/lib/sdk/core/reference.js
addon-sdk/source/lib/sdk/core/reference.js
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:ccac44868c34 |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 "use strict"; | |
| 6 | |
| 7 module.metadata = { | |
| 8 "stability": "experimental" | |
| 9 }; | |
| 10 | |
| 11 const method = require("../../method/core"); | |
| 12 const { Class } = require("./heritage"); | |
| 13 | |
| 14 // Object that inherit or mix WeakRefence inn will register | |
| 15 // weak observes for system notifications. | |
| 16 const WeakReference = Class({}); | |
| 17 exports.WeakReference = WeakReference; | |
| 18 | |
| 19 | |
| 20 // If `isWeak(object)` is `true` observer installed | |
| 21 // for such `object` will be weak, meaning that it will | |
| 22 // be GC-ed if nothing else but observer is observing it. | |
| 23 // By default everything except `WeakReference` will return | |
| 24 // `false`. | |
| 25 const isWeak = method("reference/weak?"); | |
| 26 exports.isWeak = isWeak; | |
| 27 | |
| 28 isWeak.define(Object, _ => false); | |
| 29 isWeak.define(WeakReference, _ => true); |
