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74 lines
1.9 KiB
TypeScript
74 lines
1.9 KiB
TypeScript
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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import * as dispatch from "./dispatch";
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import * as msg from "gen/msg_generated";
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import * as flatbuffers from "./flatbuffers";
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import { assert, log } from "./util";
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import { globalEval } from "./global_eval";
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export async function postMessage(data: Uint8Array): Promise<void> {
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const builder = flatbuffers.createBuilder();
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msg.WorkerPostMessage.startWorkerPostMessage(builder);
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const inner = msg.WorkerPostMessage.endWorkerPostMessage(builder);
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const baseRes = await dispatch.sendAsync(
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builder,
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msg.Any.WorkerPostMessage,
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inner,
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data
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);
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assert(baseRes != null);
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}
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export async function getMessage(): Promise<null | Uint8Array> {
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log("getMessage");
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const builder = flatbuffers.createBuilder();
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msg.WorkerGetMessage.startWorkerGetMessage(builder);
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const inner = msg.WorkerGetMessage.endWorkerGetMessage(builder);
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const baseRes = await dispatch.sendAsync(
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builder,
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msg.Any.WorkerGetMessage,
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inner
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);
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assert(baseRes != null);
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assert(
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msg.Any.WorkerGetMessageRes === baseRes!.innerType(),
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`base.innerType() unexpectedly is ${baseRes!.innerType()}`
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);
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const res = new msg.WorkerGetMessageRes();
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assert(baseRes!.inner(res) != null);
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const dataArray = res.dataArray();
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if (dataArray == null) {
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return null;
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} else {
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return new Uint8Array(dataArray!);
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}
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}
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let isClosing = false;
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export function workerClose(): void {
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isClosing = true;
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}
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export async function workerMain() {
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log("workerMain");
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// TODO avoid using globalEval to get Window. But circular imports if getting
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// it from globals.ts
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const window = globalEval("this");
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while (!isClosing) {
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const data = await getMessage();
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if (data == null) {
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log("workerMain got null message. quitting.");
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break;
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}
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if (window["onmessage"]) {
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const event = { data };
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window.onmessage(event);
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} else {
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break;
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}
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}
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}
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