@loaders.gl/worker-utils/dist/index.cjs

Utilities for running tasks on worker threads

"use strict";
var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, { enumerable: true, configurable: true, writable: true, value }) : obj[key] = value;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
  // If the importer is in node compatibility mode or this is not an ESM
  // file that has been converted to a CommonJS file using a Babel-
  // compatible transform (i.e. "__esModule" has not been set), then set
  // "default" to the CommonJS "module.exports" for node compatibility.
  isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
  mod
));
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var __publicField = (obj, key, value) => {
  __defNormalProp(obj, typeof key !== "symbol" ? key + "" : key, value);
  return value;
};

// dist/index.js
var dist_exports = {};
__export(dist_exports, {
  AsyncQueue: () => AsyncQueue,
  ChildProcessProxy: () => ChildProcessProxy,
  NullWorker: () => NullWorker,
  WorkerBody: () => WorkerBody,
  WorkerFarm: () => WorkerFarm,
  WorkerJob: () => WorkerJob,
  WorkerPool: () => WorkerPool,
  WorkerThread: () => WorkerThread,
  assert: () => assert,
  canProcessOnWorker: () => canProcessOnWorker,
  createWorker: () => createWorker,
  getLibraryUrl: () => getLibraryUrl,
  getTransferList: () => getTransferList,
  getTransferListForWriter: () => getTransferListForWriter,
  getWorkerURL: () => getWorkerURL,
  isBrowser: () => isBrowser,
  isWorker: () => isWorker,
  loadLibrary: () => loadLibrary,
  processOnWorker: () => processOnWorker,
  validateWorkerVersion: () => validateWorkerVersion
});
module.exports = __toCommonJS(dist_exports);

// dist/lib/env-utils/version.js
var NPM_TAG = "latest";
function getVersion() {
  var _a;
  if (!((_a = globalThis._loadersgl_) == null ? void 0 : _a.version)) {
    globalThis._loadersgl_ = globalThis._loadersgl_ || {};
    if (false) {
      console.warn("loaders.gl: The __VERSION__ variable is not injected using babel plugin. Latest unstable workers would be fetched from the CDN.");
      globalThis._loadersgl_.version = NPM_TAG;
    } else {
      globalThis._loadersgl_.version = "4.3.2";
    }
  }
  return globalThis._loadersgl_.version;
}
var VERSION = getVersion();

// dist/lib/env-utils/assert.js
function assert(condition, message) {
  if (!condition) {
    throw new Error(message || "loaders.gl assertion failed.");
  }
}

// dist/lib/env-utils/globals.js
var globals = {
  self: typeof self !== "undefined" && self,
  window: typeof window !== "undefined" && window,
  global: typeof global !== "undefined" && global,
  document: typeof document !== "undefined" && document
};
var self_ = globals.self || globals.window || globals.global || {};
var window_ = globals.window || globals.self || globals.global || {};
var global_ = globals.global || globals.self || globals.window || {};
var document_ = globals.document || {};
var isBrowser = (
  // @ts-ignore process.browser
  typeof process !== "object" || String(process) !== "[object process]" || process.browser
);
var isWorker = typeof importScripts === "function";
var isMobile = typeof window !== "undefined" && typeof window.orientation !== "undefined";
var matches = typeof process !== "undefined" && process.version && /v([0-9]*)/.exec(process.version);
var nodeVersion = matches && parseFloat(matches[1]) || 0;

// dist/lib/worker-farm/worker-job.js
var WorkerJob = class {
  name;
  workerThread;
  isRunning = true;
  /** Promise that resolves when Job is done */
  result;
  _resolve = () => {
  };
  _reject = () => {
  };
  constructor(jobName, workerThread) {
    this.name = jobName;
    this.workerThread = workerThread;
    this.result = new Promise((resolve, reject) => {
      this._resolve = resolve;
      this._reject = reject;
    });
  }
  /**
   * Send a message to the job's worker thread
   * @param data any data structure, ideally consisting mostly of transferrable objects
   */
  postMessage(type, payload) {
    this.workerThread.postMessage({
      source: "loaders.gl",
      // Lets worker ignore unrelated messages
      type,
      payload
    });
  }
  /**
   * Call to resolve the `result` Promise with the supplied value
   */
  done(value) {
    assert(this.isRunning);
    this.isRunning = false;
    this._resolve(value);
  }
  /**
   * Call to reject the `result` Promise with the supplied error
   */
  error(error) {
    assert(this.isRunning);
    this.isRunning = false;
    this._reject(error);
  }
};

// dist/lib/node/worker_threads-browser.js
var NodeWorker = class {
  terminate() {
  }
};
var parentPort = null;

// dist/lib/worker-utils/get-loadable-worker-url.js
var workerURLCache = /* @__PURE__ */ new Map();
function getLoadableWorkerURL(props) {
  assert(props.source && !props.url || !props.source && props.url);
  let workerURL = workerURLCache.get(props.source || props.url);
  if (!workerURL) {
    if (props.url) {
      workerURL = getLoadableWorkerURLFromURL(props.url);
      workerURLCache.set(props.url, workerURL);
    }
    if (props.source) {
      workerURL = getLoadableWorkerURLFromSource(props.source);
      workerURLCache.set(props.source, workerURL);
    }
  }
  assert(workerURL);
  return workerURL;
}
function getLoadableWorkerURLFromURL(url) {
  if (!url.startsWith("http")) {
    return url;
  }
  const workerSource = buildScriptSource(url);
  return getLoadableWorkerURLFromSource(workerSource);
}
function getLoadableWorkerURLFromSource(workerSource) {
  const blob = new Blob([workerSource], { type: "application/javascript" });
  return URL.createObjectURL(blob);
}
function buildScriptSource(workerUrl) {
  return `try {
  importScripts('${workerUrl}');
} catch (error) {
  console.error(error);
  throw error;
}`;
}

// dist/lib/worker-utils/get-transfer-list.js
function getTransferList(object, recursive = true, transfers) {
  const transfersSet = transfers || /* @__PURE__ */ new Set();
  if (!object) {
  } else if (isTransferable(object)) {
    transfersSet.add(object);
  } else if (isTransferable(object.buffer)) {
    transfersSet.add(object.buffer);
  } else if (ArrayBuffer.isView(object)) {
  } else if (recursive && typeof object === "object") {
    for (const key in object) {
      getTransferList(object[key], recursive, transfersSet);
    }
  }
  return transfers === void 0 ? Array.from(transfersSet) : [];
}
function isTransferable(object) {
  if (!object) {
    return false;
  }
  if (object instanceof ArrayBuffer) {
    return true;
  }
  if (typeof MessagePort !== "undefined" && object instanceof MessagePort) {
    return true;
  }
  if (typeof ImageBitmap !== "undefined" && object instanceof ImageBitmap) {
    return true;
  }
  if (typeof OffscreenCanvas !== "undefined" && object instanceof OffscreenCanvas) {
    return true;
  }
  return false;
}
function getTransferListForWriter(object) {
  if (object === null) {
    return {};
  }
  const clone = Object.assign({}, object);
  Object.keys(clone).forEach((key) => {
    if (typeof object[key] === "object" && !ArrayBuffer.isView(object[key]) && !(object[key] instanceof Array)) {
      clone[key] = getTransferListForWriter(object[key]);
    } else if (typeof clone[key] === "function" || clone[key] instanceof RegExp) {
      clone[key] = {};
    } else {
      clone[key] = object[key];
    }
  });
  return clone;
}

// dist/lib/worker-farm/worker-thread.js
var NOOP = () => {
};
var WorkerThread = class {
  name;
  source;
  url;
  terminated = false;
  worker;
  onMessage;
  onError;
  _loadableURL = "";
  /** Checks if workers are supported on this platform */
  static isSupported() {
    return typeof Worker !== "undefined" && isBrowser || typeof NodeWorker !== "undefined" && !isBrowser;
  }
  constructor(props) {
    const { name, source, url } = props;
    assert(source || url);
    this.name = name;
    this.source = source;
    this.url = url;
    this.onMessage = NOOP;
    this.onError = (error) => console.log(error);
    this.worker = isBrowser ? this._createBrowserWorker() : this._createNodeWorker();
  }
  /**
   * Terminate this worker thread
   * @note Can free up significant memory
   */
  destroy() {
    this.onMessage = NOOP;
    this.onError = NOOP;
    this.worker.terminate();
    this.terminated = true;
  }
  get isRunning() {
    return Boolean(this.onMessage);
  }
  /**
   * Send a message to this worker thread
   * @param data any data structure, ideally consisting mostly of transferrable objects
   * @param transferList If not supplied, calculated automatically by traversing data
   */
  postMessage(data, transferList) {
    transferList = transferList || getTransferList(data);
    this.worker.postMessage(data, transferList);
  }
  // PRIVATE
  /**
   * Generate a standard Error from an ErrorEvent
   * @param event
   */
  _getErrorFromErrorEvent(event) {
    let message = "Failed to load ";
    message += `worker ${this.name} from ${this.url}. `;
    if (event.message) {
      message += `${event.message} in `;
    }
    if (event.lineno) {
      message += `:${event.lineno}:${event.colno}`;
    }
    return new Error(message);
  }
  /**
   * Creates a worker thread on the browser
   */
  _createBrowserWorker() {
    this._loadableURL = getLoadableWorkerURL({ source: this.source, url: this.url });
    const worker = new Worker(this._loadableURL, { name: this.name });
    worker.onmessage = (event) => {
      if (!event.data) {
        this.onError(new Error("No data received"));
      } else {
        this.onMessage(event.data);
      }
    };
    worker.onerror = (error) => {
      this.onError(this._getErrorFromErrorEvent(error));
      this.terminated = true;
    };
    worker.onmessageerror = (event) => console.error(event);
    return worker;
  }
  /**
   * Creates a worker thread in node.js
   * @todo https://nodejs.org/api/async_hooks.html#async-resource-worker-pool
   */
  _createNodeWorker() {
    let worker;
    if (this.url) {
      const absolute = this.url.includes(":/") || this.url.startsWith("/");
      const url = absolute ? this.url : `./${this.url}`;
      worker = new NodeWorker(url, { eval: false });
    } else if (this.source) {
      worker = new NodeWorker(this.source, { eval: true });
    } else {
      throw new Error("no worker");
    }
    worker.on("message", (data) => {
      this.onMessage(data);
    });
    worker.on("error", (error) => {
      this.onError(error);
    });
    worker.on("exit", (code) => {
    });
    return worker;
  }
};

// dist/lib/worker-farm/worker-pool.js
var WorkerPool = class {
  name = "unnamed";
  source;
  // | Function;
  url;
  maxConcurrency = 1;
  maxMobileConcurrency = 1;
  onDebug = () => {
  };
  reuseWorkers = true;
  props = {};
  jobQueue = [];
  idleQueue = [];
  count = 0;
  isDestroyed = false;
  /** Checks if workers are supported on this platform */
  static isSupported() {
    return WorkerThread.isSupported();
  }
  /**
   * @param processor - worker function
   * @param maxConcurrency - max count of workers
   */
  constructor(props) {
    this.source = props.source;
    this.url = props.url;
    this.setProps(props);
  }
  /**
   * Terminates all workers in the pool
   * @note Can free up significant memory
   */
  destroy() {
    this.idleQueue.forEach((worker) => worker.destroy());
    this.isDestroyed = true;
  }
  setProps(props) {
    this.props = { ...this.props, ...props };
    if (props.name !== void 0) {
      this.name = props.name;
    }
    if (props.maxConcurrency !== void 0) {
      this.maxConcurrency = props.maxConcurrency;
    }
    if (props.maxMobileConcurrency !== void 0) {
      this.maxMobileConcurrency = props.maxMobileConcurrency;
    }
    if (props.reuseWorkers !== void 0) {
      this.reuseWorkers = props.reuseWorkers;
    }
    if (props.onDebug !== void 0) {
      this.onDebug = props.onDebug;
    }
  }
  async startJob(name, onMessage2 = (job, type, data) => job.done(data), onError = (job, error) => job.error(error)) {
    const startPromise = new Promise((onStart) => {
      this.jobQueue.push({ name, onMessage: onMessage2, onError, onStart });
      return this;
    });
    this._startQueuedJob();
    return await startPromise;
  }
  // PRIVATE
  /**
   * Starts first queued job if worker is available or can be created
   * Called when job is started and whenever a worker returns to the idleQueue
   */
  async _startQueuedJob() {
    if (!this.jobQueue.length) {
      return;
    }
    const workerThread = this._getAvailableWorker();
    if (!workerThread) {
      return;
    }
    const queuedJob = this.jobQueue.shift();
    if (queuedJob) {
      this.onDebug({
        message: "Starting job",
        name: queuedJob.name,
        workerThread,
        backlog: this.jobQueue.length
      });
      const job = new WorkerJob(queuedJob.name, workerThread);
      workerThread.onMessage = (data) => queuedJob.onMessage(job, data.type, data.payload);
      workerThread.onError = (error) => queuedJob.onError(job, error);
      queuedJob.onStart(job);
      try {
        await job.result;
      } catch (error) {
        console.error(`Worker exception: ${error}`);
      } finally {
        this.returnWorkerToQueue(workerThread);
      }
    }
  }
  /**
   * Returns a worker to the idle queue
   * Destroys the worker if
   *  - pool is destroyed
   *  - if this pool doesn't reuse workers
   *  - if maxConcurrency has been lowered
   * @param worker
   */
  returnWorkerToQueue(worker) {
    const shouldDestroyWorker = (
      // Workers on Node.js prevent the process from exiting.
      // Until we figure out how to close them before exit, we always destroy them
      !isBrowser || // If the pool is destroyed, there is no reason to keep the worker around
      this.isDestroyed || // If the app has disabled worker reuse, any completed workers should be destroyed
      !this.reuseWorkers || // If concurrency has been lowered, this worker might be surplus to requirements
      this.count > this._getMaxConcurrency()
    );
    if (shouldDestroyWorker) {
      worker.destroy();
      this.count--;
    } else {
      this.idleQueue.push(worker);
    }
    if (!this.isDestroyed) {
      this._startQueuedJob();
    }
  }
  /**
   * Returns idle worker or creates new worker if maxConcurrency has not been reached
   */
  _getAvailableWorker() {
    if (this.idleQueue.length > 0) {
      return this.idleQueue.shift() || null;
    }
    if (this.count < this._getMaxConcurrency()) {
      this.count++;
      const name = `${this.name.toLowerCase()} (#${this.count} of ${this.maxConcurrency})`;
      return new WorkerThread({ name, source: this.source, url: this.url });
    }
    return null;
  }
  _getMaxConcurrency() {
    return isMobile ? this.maxMobileConcurrency : this.maxConcurrency;
  }
};

// dist/lib/worker-farm/worker-farm.js
var DEFAULT_PROPS = {
  maxConcurrency: 3,
  maxMobileConcurrency: 1,
  reuseWorkers: true,
  onDebug: () => {
  }
};
var _WorkerFarm = class {
  props;
  workerPools = /* @__PURE__ */ new Map();
  /** Checks if workers are supported on this platform */
  static isSupported() {
    return WorkerThread.isSupported();
  }
  /** Get the singleton instance of the global worker farm */
  static getWorkerFarm(props = {}) {
    _WorkerFarm._workerFarm = _WorkerFarm._workerFarm || new _WorkerFarm({});
    _WorkerFarm._workerFarm.setProps(props);
    return _WorkerFarm._workerFarm;
  }
  /** get global instance with WorkerFarm.getWorkerFarm() */
  constructor(props) {
    this.props = { ...DEFAULT_PROPS };
    this.setProps(props);
    this.workerPools = /* @__PURE__ */ new Map();
  }
  /**
   * Terminate all workers in the farm
   * @note Can free up significant memory
   */
  destroy() {
    for (const workerPool of this.workerPools.values()) {
      workerPool.destroy();
    }
    this.workerPools = /* @__PURE__ */ new Map();
  }
  /**
   * Set props used when initializing worker pools
   * @param props
   */
  setProps(props) {
    this.props = { ...this.props, ...props };
    for (const workerPool of this.workerPools.values()) {
      workerPool.setProps(this._getWorkerPoolProps());
    }
  }
  /**
   * Returns a worker pool for the specified worker
   * @param options - only used first time for a specific worker name
   * @param options.name - the name of the worker - used to identify worker pool
   * @param options.url -
   * @param options.source -
   * @example
   *   const job = WorkerFarm.getWorkerFarm().getWorkerPool({name, url}).startJob(...);
   */
  getWorkerPool(options2) {
    const { name, source, url } = options2;
    let workerPool = this.workerPools.get(name);
    if (!workerPool) {
      workerPool = new WorkerPool({
        name,
        source,
        url
      });
      workerPool.setProps(this._getWorkerPoolProps());
      this.workerPools.set(name, workerPool);
    }
    return workerPool;
  }
  _getWorkerPoolProps() {
    return {
      maxConcurrency: this.props.maxConcurrency,
      maxMobileConcurrency: this.props.maxMobileConcurrency,
      reuseWorkers: this.props.reuseWorkers,
      onDebug: this.props.onDebug
    };
  }
};
var WorkerFarm = _WorkerFarm;
// singleton
__publicField(WorkerFarm, "_workerFarm");

// dist/lib/worker-farm/worker-body.js
async function getParentPort() {
  return parentPort;
}
var onMessageWrapperMap = /* @__PURE__ */ new Map();
var WorkerBody = class {
  /** Check that we are actually in a worker thread */
  static async inWorkerThread() {
    return typeof self !== "undefined" || Boolean(await getParentPort());
  }
  /*
   * (type: WorkerMessageType, payload: WorkerMessagePayload) => any
   */
  static set onmessage(onMessage2) {
    async function handleMessage(message) {
      const parentPort2 = await getParentPort();
      const { type, payload } = parentPort2 ? message : message.data;
      onMessage2(type, payload);
    }
    getParentPort().then((parentPort2) => {
      if (parentPort2) {
        parentPort2.on("message", (message) => {
          handleMessage(message);
        });
        parentPort2.on("exit", () => console.debug("Node worker closing"));
      } else {
        globalThis.onmessage = handleMessage;
      }
    });
  }
  static async addEventListener(onMessage2) {
    let onMessageWrapper = onMessageWrapperMap.get(onMessage2);
    if (!onMessageWrapper) {
      onMessageWrapper = async (message) => {
        if (!isKnownMessage(message)) {
          return;
        }
        const parentPort3 = await getParentPort();
        const { type, payload } = parentPort3 ? message : message.data;
        onMessage2(type, payload);
      };
    }
    const parentPort2 = await getParentPort();
    if (parentPort2) {
      console.error("not implemented");
    } else {
      globalThis.addEventListener("message", onMessageWrapper);
    }
  }
  static async removeEventListener(onMessage2) {
    const onMessageWrapper = onMessageWrapperMap.get(onMessage2);
    onMessageWrapperMap.delete(onMessage2);
    const parentPort2 = await getParentPort();
    if (parentPort2) {
      console.error("not implemented");
    } else {
      globalThis.removeEventListener("message", onMessageWrapper);
    }
  }
  /**
   * Send a message from a worker to creating thread (main thread)
   * @param type
   * @param payload
   */
  static async postMessage(type, payload) {
    const data = { source: "loaders.gl", type, payload };
    const transferList = getTransferList(payload);
    const parentPort2 = await getParentPort();
    if (parentPort2) {
      parentPort2.postMessage(data, transferList);
    } else {
      globalThis.postMessage(data, transferList);
    }
  }
};
function isKnownMessage(message) {
  const { type, data } = message;
  return type === "message" && data && typeof data.source === "string" && data.source.startsWith("loaders.gl");
}

// dist/lib/worker-api/get-worker-url.js
function getWorkerName(worker) {
  const warning = worker.version !== VERSION ? ` (worker-utils@${VERSION})` : "";
  return `${worker.name}@${worker.version}${warning}`;
}
function getWorkerURL(worker, options2 = {}) {
  const workerOptions = options2[worker.id] || {};
  const workerFile = isBrowser ? `${worker.id}-worker.js` : `${worker.id}-worker-node.js`;
  let url = workerOptions.workerUrl;
  if (!url && worker.id === "compression") {
    url = options2.workerUrl;
  }
  if (options2._workerType === "test") {
    if (isBrowser) {
      url = `modules/${worker.module}/dist/${workerFile}`;
    } else {
      url = `modules/${worker.module}/src/workers/${worker.id}-worker-node.ts`;
    }
  }
  if (!url) {
    let version = worker.version;
    if (version === "latest") {
      version = NPM_TAG;
    }
    const versionTag = version ? `@${version}` : "";
    url = `https://unpkg.com/@loaders.gl/${worker.module}${versionTag}/dist/${workerFile}`;
  }
  assert(url);
  return url;
}

// dist/lib/worker-api/process-on-worker.js
function canProcessOnWorker(worker, options2) {
  if (!WorkerFarm.isSupported()) {
    return false;
  }
  return worker.worker && (options2 == null ? void 0 : options2.worker);
}
async function processOnWorker(worker, data, options2 = {}, context = {}) {
  const name = getWorkerName(worker);
  const workerFarm = WorkerFarm.getWorkerFarm(options2);
  const { source } = options2;
  const workerPoolProps = { name, source };
  if (!source) {
    workerPoolProps.url = getWorkerURL(worker, options2);
  }
  const workerPool = workerFarm.getWorkerPool(workerPoolProps);
  const jobName = options2.jobName || worker.name;
  const job = await workerPool.startJob(
    jobName,
    // eslint-disable-next-line
    onMessage.bind(null, context)
  );
  const transferableOptions = getTransferListForWriter(options2);
  job.postMessage("process", { input: data, options: transferableOptions });
  const result = await job.result;
  return result.result;
}
async function onMessage(context, job, type, payload) {
  switch (type) {
    case "done":
      job.done(payload);
      break;
    case "error":
      job.error(new Error(payload.error));
      break;
    case "process":
      const { id, input, options: options2 } = payload;
      try {
        if (!context.process) {
          job.postMessage("error", { id, error: "Worker not set up to process on main thread" });
          return;
        }
        const result = await context.process(input, options2);
        job.postMessage("done", { id, result });
      } catch (error) {
        const message = error instanceof Error ? error.message : "unknown error";
        job.postMessage("error", { id, error: message });
      }
      break;
    default:
      console.warn(`process-on-worker: unknown message ${type}`);
  }
}

// dist/lib/async-queue/async-queue.js
var AsyncQueue = class {
  _values;
  _settlers;
  _closed;
  constructor() {
    this._values = [];
    this._settlers = [];
    this._closed = false;
  }
  /** Return an async iterator for this queue */
  [Symbol.asyncIterator]() {
    return this;
  }
  /** Push a new value - the async iterator will yield a promise resolved to this value */
  push(value) {
    return this.enqueue(value);
  }
  /**
   * Push a new value - the async iterator will yield a promise resolved to this value
   * Add an error - the async iterator will yield a promise rejected with this value
   */
  enqueue(value) {
    if (this._closed) {
      throw new Error("Closed");
    }
    if (this._settlers.length > 0) {
      if (this._values.length > 0) {
        throw new Error("Illegal internal state");
      }
      const settler = this._settlers.shift();
      if (value instanceof Error) {
        settler.reject(value);
      } else {
        settler.resolve({ value });
      }
    } else {
      this._values.push(value);
    }
  }
  /** Indicate that we not waiting for more values - The async iterator will be done */
  close() {
    while (this._settlers.length > 0) {
      const settler = this._settlers.shift();
      settler.resolve({ done: true });
    }
    this._closed = true;
  }
  // ITERATOR IMPLEMENTATION
  /** @returns a Promise for an IteratorResult */
  next() {
    if (this._values.length > 0) {
      const value = this._values.shift();
      if (value instanceof Error) {
        return Promise.reject(value);
      }
      return Promise.resolve({ done: false, value });
    }
    if (this._closed) {
      if (this._settlers.length > 0) {
        throw new Error("Illegal internal state");
      }
      return Promise.resolve({ done: true, value: void 0 });
    }
    return new Promise((resolve, reject) => {
      this._settlers.push({ resolve, reject });
    });
  }
};

// dist/lib/worker-api/create-worker.js
var requestId = 0;
var inputBatches;
var options;
async function createWorker(process2, processInBatches) {
  if (!await WorkerBody.inWorkerThread()) {
    return;
  }
  const context = {
    process: processOnMainThread
  };
  WorkerBody.onmessage = async (type, payload) => {
    try {
      switch (type) {
        case "process":
          if (!process2) {
            throw new Error("Worker does not support atomic processing");
          }
          const result = await process2(payload.input, payload.options || {}, context);
          WorkerBody.postMessage("done", { result });
          break;
        case "process-in-batches":
          if (!processInBatches) {
            throw new Error("Worker does not support batched processing");
          }
          inputBatches = new AsyncQueue();
          options = payload.options || {};
          const resultIterator = processInBatches(inputBatches, options, context);
          for await (const batch of resultIterator) {
            WorkerBody.postMessage("output-batch", { result: batch });
          }
          WorkerBody.postMessage("done", {});
          break;
        case "input-batch":
          inputBatches.push(payload.input);
          break;
        case "input-done":
          inputBatches.close();
          break;
        default:
      }
    } catch (error) {
      const message = error instanceof Error ? error.message : "";
      WorkerBody.postMessage("error", { error: message });
    }
  };
}
function processOnMainThread(arrayBuffer, options2 = {}) {
  return new Promise((resolve, reject) => {
    const id = requestId++;
    const onMessage2 = (type, payload2) => {
      if (payload2.id !== id) {
        return;
      }
      switch (type) {
        case "done":
          WorkerBody.removeEventListener(onMessage2);
          resolve(payload2.result);
          break;
        case "error":
          WorkerBody.removeEventListener(onMessage2);
          reject(payload2.error);
          break;
        default:
      }
    };
    WorkerBody.addEventListener(onMessage2);
    const payload = { id, input: arrayBuffer, options: options2 };
    WorkerBody.postMessage("process", payload);
  });
}

// dist/lib/worker-api/validate-worker-version.js
function validateWorkerVersion(worker, coreVersion = VERSION) {
  assert(worker, "no worker provided");
  const workerVersion = worker.version;
  if (!coreVersion || !workerVersion) {
    return false;
  }
  return true;
}

// dist/lib/library-utils/library-utils.js
var loadLibraryPromises = {};
async function loadLibrary(libraryUrl, moduleName = null, options2 = {}, libraryName = null) {
  if (moduleName) {
    libraryUrl = getLibraryUrl(libraryUrl, moduleName, options2, libraryName);
  }
  loadLibraryPromises[libraryUrl] = // eslint-disable-next-line @typescript-eslint/no-misused-promises
  loadLibraryPromises[libraryUrl] || loadLibraryFromFile(libraryUrl);
  return await loadLibraryPromises[libraryUrl];
}
function getLibraryUrl(library, moduleName, options2 = {}, libraryName = null) {
  if (!options2.useLocalLibraries && library.startsWith("http")) {
    return library;
  }
  libraryName = libraryName || library;
  const modules = options2.modules || {};
  if (modules[libraryName]) {
    return modules[libraryName];
  }
  if (!isBrowser) {
    return `modules/${moduleName}/dist/libs/${libraryName}`;
  }
  if (options2.CDN) {
    assert(options2.CDN.startsWith("http"));
    return `${options2.CDN}/${moduleName}@${VERSION}/dist/libs/${libraryName}`;
  }
  if (isWorker) {
    return `../src/libs/${libraryName}`;
  }
  return `modules/${moduleName}/src/libs/${libraryName}`;
}
async function loadLibraryFromFile(libraryUrl) {
  if (libraryUrl.endsWith("wasm")) {
    return await loadAsArrayBuffer(libraryUrl);
  }
  if (!isBrowser) {
    try {
      const { requireFromFile } = globalThis.loaders || {};
      return await (requireFromFile == null ? void 0 : requireFromFile(libraryUrl));
    } catch (error) {
      console.error(error);
      return null;
    }
  }
  if (isWorker) {
    return importScripts(libraryUrl);
  }
  const scriptSource = await loadAsText(libraryUrl);
  return loadLibraryFromString(scriptSource, libraryUrl);
}
function loadLibraryFromString(scriptSource, id) {
  if (!isBrowser) {
    const { requireFromString } = globalThis.loaders || {};
    return requireFromString == null ? void 0 : requireFromString(scriptSource, id);
  }
  if (isWorker) {
    eval.call(globalThis, scriptSource);
    return null;
  }
  const script = document.createElement("script");
  script.id = id;
  try {
    script.appendChild(document.createTextNode(scriptSource));
  } catch (e) {
    script.text = scriptSource;
  }
  document.body.appendChild(script);
  return null;
}
async function loadAsArrayBuffer(url) {
  const { readFileAsArrayBuffer } = globalThis.loaders || {};
  if (isBrowser || !readFileAsArrayBuffer || url.startsWith("http")) {
    const response = await fetch(url);
    return await response.arrayBuffer();
  }
  return await readFileAsArrayBuffer(url);
}
async function loadAsText(url) {
  const { readFileAsText } = globalThis.loaders || {};
  if (isBrowser || !readFileAsText || url.startsWith("http")) {
    const response = await fetch(url);
    return await response.text();
  }
  return await readFileAsText(url);
}

// dist/lib/process-utils/child-process-proxy.js
var ChildProcess2 = __toESM(require("child_process"), 1);

// dist/lib/process-utils/process-utils.js
var import_child_process = __toESM(require("child_process"), 1);
function getAvailablePort(defaultPort = 3e3) {
  return new Promise((resolve) => {
    import_child_process.default.exec("lsof -i -P -n | grep LISTEN", (error, stdout) => {
      if (error) {
        resolve(defaultPort);
        return;
      }
      const portsInUse = [];
      const regex = /:(\d+) \(LISTEN\)/;
      stdout.split("\n").forEach((line) => {
        const match = regex.exec(line);
        if (match) {
          portsInUse.push(Number(match[1]));
        }
      });
      let port = defaultPort;
      while (portsInUse.includes(port)) {
        port++;
      }
      resolve(port);
    });
  });
}

// dist/lib/process-utils/child-process-proxy.js
var DEFAULT_PROPS2 = {
  command: "",
  arguments: [],
  port: 5e3,
  autoPort: true,
  wait: 2e3,
  onSuccess: (processProxy) => {
    console.log(`Started ${processProxy.props.command}`);
  }
};
var ChildProcessProxy = class {
  id;
  props = { ...DEFAULT_PROPS2 };
  childProcess = null;
  port = 0;
  successTimer;
  // NodeJS.Timeout;
  // constructor(props?: {id?: string});
  constructor({ id = "browser-driver" } = {}) {
    this.id = id;
  }
  /** Starts a child process with the provided props */
  async start(props) {
    props = { ...DEFAULT_PROPS2, ...props };
    this.props = props;
    const args = [...props.arguments];
    this.port = Number(props.port);
    if (props.portArg) {
      if (props.autoPort) {
        this.port = await getAvailablePort(props.port);
      }
      args.push(props.portArg, String(this.port));
    }
    return await new Promise((resolve, reject) => {
      try {
        this._setTimeout(() => {
          if (props.onSuccess) {
            props.onSuccess(this);
          }
          resolve({});
        });
        console.log(`Spawning ${props.command} ${props.arguments.join(" ")}`);
        const childProcess = ChildProcess2.spawn(props.command, args, props.spawn);
        this.childProcess = childProcess;
        childProcess.stdout.on("data", (data) => {
          console.log(data.toString());
        });
        childProcess.stderr.on("data", (data) => {
          console.log(`Child process wrote to stderr: "${data}".`);
          if (!props.ignoreStderr) {
            this._clearTimeout();
            reject(new Error(data));
          }
        });
        childProcess.on("error", (error) => {
          console.log(`Child process errored with ${error}`);
          this._clearTimeout();
          reject(error);
        });
        childProcess.on("close", (code) => {
          console.log(`Child process exited with ${code}`);
          this.childProcess = null;
          this._clearTimeout();
          resolve({});
        });
      } catch (error) {
        reject(error);
      }
    });
  }
  /** Stops a running child process */
  async stop() {
    if (this.childProcess) {
      this.childProcess.kill();
      this.childProcess = null;
    }
  }
  /** Exits this process */
  async exit(statusCode = 0) {
    try {
      await this.stop();
      process.exit(statusCode);
    } catch (error) {
      console.error(error.message || error);
      process.exit(1);
    }
  }
  _setTimeout(callback) {
    if (Number(this.props.wait) > 0) {
      this.successTimer = setTimeout(callback, this.props.wait);
    }
  }
  _clearTimeout() {
    if (this.successTimer) {
      clearTimeout(this.successTimer);
    }
  }
};

// dist/index.js
var NullWorker = {
  id: "null",
  name: "null",
  module: "worker-utils",
  version: VERSION,
  options: {
    null: {}
  }
};
//# sourceMappingURL=index.cjs.map