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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /addon-sdk/source/lib/sdk/core/reference.js | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'addon-sdk/source/lib/sdk/core/reference.js')
-rw-r--r-- | addon-sdk/source/lib/sdk/core/reference.js | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/addon-sdk/source/lib/sdk/core/reference.js b/addon-sdk/source/lib/sdk/core/reference.js new file mode 100644 index 000000000..04549cd0f --- /dev/null +++ b/addon-sdk/source/lib/sdk/core/reference.js @@ -0,0 +1,29 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +"use strict"; + +module.metadata = { + "stability": "experimental" +}; + +const method = require("../../method/core"); +const { Class } = require("./heritage"); + +// Object that inherit or mix WeakRefence inn will register +// weak observes for system notifications. +const WeakReference = Class({}); +exports.WeakReference = WeakReference; + + +// If `isWeak(object)` is `true` observer installed +// for such `object` will be weak, meaning that it will +// be GC-ed if nothing else but observer is observing it. +// By default everything except `WeakReference` will return +// `false`. +const isWeak = method("reference/weak?"); +exports.isWeak = isWeak; + +isWeak.define(Object, _ => false); +isWeak.define(WeakReference, _ => true); |