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8316d5a0c0
This is the first basic implementation of a shared-memory key-value store for JS message managers. It has one read-write endpoint in the parent process, and separate read-only endpoints for each child-process message manager. Changes to the parent endpoint are broadcast to the children as snapshots. Each snapshot triggers a "change" event with a list of changed keys. It currently has the following limitations: - It only supports basic structured clone data. There's no support for blobs, input streams, message ports... Blob support will be added in a follow-up patch. - Changes are currently only broadcast to child endpoints when flush() is explicitly called in the parent, or when new child processes are launched. In a follow-up, this will be changed to automatically flush after changes when the event loop is idle. - All set operations clone their inputs synchronously, which means that there's no trivial way for callers to batch multiple changes to a single key without some additional effort. It might be useful to add a delayed-serialization option to the .set() call in a follow-up, for callers who are sure they know what they're doing. MozReview-Commit-ID: IM8a3UgejXU --HG-- extra : rebase_source : 66c92d538a5485349bc789028fdc3a6806bc5d5a extra : source : 2ebaf5f8c6055b11b11d7ec334d54ee941115d48
55 lines
1.4 KiB
Plaintext
55 lines
1.4 KiB
Plaintext
/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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typedef any StructuredClonable;
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[ChromeOnly]
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interface MozSharedMapChangeEvent : Event {
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[Cached, Constant]
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readonly attribute sequence<DOMString> changedKeys;
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};
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dictionary MozSharedMapChangeEventInit : EventInit {
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required sequence<DOMString> changedKeys;
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};
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[ChromeOnly]
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interface MozSharedMap : EventTarget {
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boolean has(DOMString name);
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[Throws]
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StructuredClonable get(DOMString name);
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iterable<DOMString, StructuredClonable>;
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};
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[ChromeOnly]
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interface MozWritableSharedMap : MozSharedMap {
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/**
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* Sets the given key to the given structured-clonable value. The value is
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* synchronously structured cloned, and the serialized value is saved in the
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* map.
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*
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* Unless flush() is called, the new value will be broadcast to content
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* processes after a short delay.
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*/
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[Throws]
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void set(DOMString name, StructuredClonable value);
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/**
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* Removes the given key from the map.
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*
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* Unless flush() is called, the removal will be broadcast to content
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* processes after a short delay.
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*/
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void delete(DOMString name);
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/**
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* Broadcasts any pending changes to all content processes.
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*/
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void flush();
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};
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