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91 lines
2.4 KiB
JavaScript
91 lines
2.4 KiB
JavaScript
/* 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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import { PromiseWorker } from "resource://gre/modules/workers/PromiseWorker.mjs";
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// Respect the preference "browser.ml.logLevel".
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let _loggingLevel = "Error";
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function log(...args) {
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if (_loggingLevel !== "Error" && _loggingLevel !== "Warn") {
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console.log("ML:", ...args);
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}
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}
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function trace(...args) {
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if (_loggingLevel === "Trace" || _loggingLevel === "All") {
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console.log("ML:", ...args);
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}
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}
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/**
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* The actual MLEngine lives here in a worker.
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*/
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class MLEngineWorker {
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/** @type {ArrayBuffer} */
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#wasm;
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/** @type {ArrayBuffer} */
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#model;
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constructor() {
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// Connect the provider to the worker.
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this.#connectToPromiseWorker();
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}
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/**
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* @param {ArrayBuffer} wasm
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* @param {ArrayBuffer} model
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* @param {string} loggingLevel
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*/
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initializeEngine(wasm, model, loggingLevel) {
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this.#wasm = wasm;
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this.#model = model;
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_loggingLevel = loggingLevel;
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// TODO - Initialize the engine for real here.
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log("MLEngineWorker is initalized");
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}
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/**
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* Run the worker.
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*
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* @param {string} request
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*/
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run(request) {
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if (!this.#wasm) {
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throw new Error("Expected the wasm to exist.");
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}
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if (!this.#model) {
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throw new Error("Expected the model to exist");
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}
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if (request === "throw") {
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throw new Error(
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'Received the message "throw", so intentionally throwing an error.'
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);
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}
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trace("inference run requested with:", request);
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return request.slice(0, Math.floor(request.length / 2));
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}
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/**
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* Glue code to connect the `MLEngineWorker` to the PromiseWorker interface.
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*/
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#connectToPromiseWorker() {
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const worker = new PromiseWorker.AbstractWorker();
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worker.dispatch = (method, args = []) => {
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if (!this[method]) {
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throw new Error("Method does not exist: " + method);
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}
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return this[method](...args);
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};
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worker.close = () => self.close();
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worker.postMessage = (message, ...transfers) => {
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self.postMessage(message, ...transfers);
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};
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self.addEventListener("message", msg => worker.handleMessage(msg));
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self.addEventListener("unhandledrejection", function (error) {
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throw error.reason;
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});
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}
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}
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new MLEngineWorker();
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