mirror of https://github.com/denoland/deno.git
112 lines
3.2 KiB
TypeScript
112 lines
3.2 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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// This module is the entry point for "worker" isolate, ie. the one
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// that is created using `new Worker()` JS API.
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//
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// It provides a single function that should be called by Rust:
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// - `bootstrapWorkerRuntime` - must be called once, when Isolate is created.
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// It sets up runtime by providing globals for `DedicatedWorkerScope`.
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/* eslint-disable @typescript-eslint/no-explicit-any */
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import {
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readOnly,
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writable,
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nonEnumerable,
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windowOrWorkerGlobalScopeMethods,
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windowOrWorkerGlobalScopeProperties,
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eventTargetProperties,
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} from "./globals.ts";
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import * as webWorkerOps from "./ops/web_worker.ts";
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import { LocationImpl } from "./web/location.ts";
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import { log, assert, immutableDefine } from "./util.ts";
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import { TextEncoder } from "./web/text_encoding.ts";
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import * as runtime from "./runtime.ts";
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const encoder = new TextEncoder();
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// TODO(bartlomieju): remove these funtions
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// Stuff for workers
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export const onmessage: (e: { data: any }) => void = (): void => {};
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export const onerror: (e: { data: any }) => void = (): void => {};
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export function postMessage(data: any): void {
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const dataJson = JSON.stringify(data);
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const dataIntArray = encoder.encode(dataJson);
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webWorkerOps.postMessage(dataIntArray);
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}
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let isClosing = false;
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let hasBootstrapped = false;
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export function close(): void {
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if (isClosing) {
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return;
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}
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isClosing = true;
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webWorkerOps.close();
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}
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export async function workerMessageRecvCallback(data: string): Promise<void> {
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let result: void | Promise<void>;
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const event = { data };
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try {
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//
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if (globalThis["onmessage"]) {
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result = globalThis.onmessage!(event);
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if (result && "then" in result) {
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await result;
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}
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}
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// TODO: run the rest of liteners
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} catch (e) {
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if (globalThis["onerror"]) {
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const result = globalThis.onerror(
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e.message,
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e.fileName,
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e.lineNumber,
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e.columnNumber,
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e
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);
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if (result === true) {
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return;
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}
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}
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throw e;
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}
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}
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export const workerRuntimeGlobalProperties = {
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self: readOnly(globalThis),
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onmessage: writable(onmessage),
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onerror: writable(onerror),
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// TODO: should be readonly?
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close: nonEnumerable(close),
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postMessage: writable(postMessage),
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workerMessageRecvCallback: nonEnumerable(workerMessageRecvCallback),
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};
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export function bootstrapWorkerRuntime(name: string): void {
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if (hasBootstrapped) {
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throw new Error("Worker runtime already bootstrapped");
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}
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log("bootstrapWorkerRuntime");
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hasBootstrapped = true;
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Object.defineProperties(globalThis, windowOrWorkerGlobalScopeMethods);
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Object.defineProperties(globalThis, windowOrWorkerGlobalScopeProperties);
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Object.defineProperties(globalThis, workerRuntimeGlobalProperties);
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Object.defineProperties(globalThis, eventTargetProperties);
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Object.defineProperties(globalThis, { name: readOnly(name) });
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const s = runtime.start(name);
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const location = new LocationImpl(s.location);
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immutableDefine(globalThis, "location", location);
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Object.freeze(globalThis.location);
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// globalThis.Deno is not available in worker scope
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delete globalThis.Deno;
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assert(globalThis.Deno === undefined);
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}
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