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import { parentPort, Worker, workerData } from "worker_threads";
export type ModuleSpecifier = string;
export interface Thread<I, O> {    onMessage: (callback: (o: O) => void | Promise<void>) => void;    postMessage: (i: I) => void | Promise<void>;}
interface Seed<S> {    seed: Promise<S>;}
export function createThread<I, O, S>(    specifier: ModuleSpecifier,    seed: S,): Thread<I, O> {    const worker = new Worker(specifier, { workerData: seed });    return {        onMessage(callback) {            worker.on("message", callback);        },        postMessage(i) {            worker.postMessage(i);        },    };}
export function parentThread<I, O, S>(): Thread<I, O> & Seed<S> {    return {        seed: Promise.resolve(workerData),        onMessage(callback) {            parentPort?.on("message", callback);        },        postMessage(o) {            parentPort?.postMessage(o);        },    };}