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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license."use strict";
// @ts-check/// <reference path="../../core/internal.d.ts" />
((window) => {  const webidl = window.__bootstrap.webidl;  const { Event, setIsTrusted, defineEventHandler } = window.__bootstrap.event;  const { EventTarget, listenerCount } = window.__bootstrap.eventTarget;  const {    Set,    SetPrototypeAdd,    SetPrototypeDelete,    Symbol,    TypeError,  } = window.__bootstrap.primordials;  const { setTimeout, refTimer, unrefTimer } = window.__bootstrap.timers;
  const add = Symbol("[[add]]");  const signalAbort = Symbol("[[signalAbort]]");  const remove = Symbol("[[remove]]");  const abortReason = Symbol("[[abortReason]]");  const abortAlgos = Symbol("[[abortAlgos]]");  const signal = Symbol("[[signal]]");  const timerId = Symbol("[[timerId]]");
  const illegalConstructorKey = Symbol("illegalConstructorKey");
  class AbortSignal extends EventTarget {    static abort(reason = undefined) {      if (reason !== undefined) {        reason = webidl.converters.any(reason);      }      const signal = new AbortSignal(illegalConstructorKey);      signal[signalAbort](reason);      return signal;    }
    static timeout(millis) {      const prefix = "Failed to call 'AbortSignal.timeout'";      webidl.requiredArguments(arguments.length, 1, { prefix });      millis = webidl.converters["unsigned long long"](millis, {        enforceRange: true,      });
      const signal = new AbortSignal(illegalConstructorKey);      signal[timerId] = setTimeout(        () => {          signal[timerId] = null;          signal[signalAbort](            new DOMException("Signal timed out.", "TimeoutError"),          );        },        millis,      );      unrefTimer(signal[timerId]);      return signal;    }
    [add](algorithm) {      if (this.aborted) {        return;      }      if (this[abortAlgos] === null) {        this[abortAlgos] = new Set();      }      SetPrototypeAdd(this[abortAlgos], algorithm);    }
    [signalAbort](      reason = new DOMException("The signal has been aborted", "AbortError"),    ) {      if (this.aborted) {        return;      }      this[abortReason] = reason;      if (this[abortAlgos] !== null) {        for (const algorithm of this[abortAlgos]) {          algorithm();        }        this[abortAlgos] = null;      }      const event = new Event("abort");      setIsTrusted(event, true);      this.dispatchEvent(event);    }
    [remove](algorithm) {      this[abortAlgos] && SetPrototypeDelete(this[abortAlgos], algorithm);    }
    constructor(key = null) {      if (key != illegalConstructorKey) {        throw new TypeError("Illegal constructor.");      }      super();      this[abortReason] = undefined;      this[abortAlgos] = null;      this[timerId] = null;      this[webidl.brand] = webidl.brand;    }
    get aborted() {      webidl.assertBranded(this, AbortSignalPrototype);      return this[abortReason] !== undefined;    }
    get reason() {      webidl.assertBranded(this, AbortSignalPrototype);      return this[abortReason];    }
    throwIfAborted() {      webidl.assertBranded(this, AbortSignalPrototype);      if (this[abortReason] !== undefined) {        throw this[abortReason];      }    }
    // `addEventListener` and `removeEventListener` have to be overriden in    // order to have the timer block the event loop while there are listeners.    // `[add]` and `[remove]` don't ref and unref the timer because they can    // only be used by Deno internals, which use it to essentially cancel async    // ops which would block the event loop.    addEventListener(...args) {      super.addEventListener(...args);      if (this[timerId] !== null && listenerCount(this, "abort") > 0) {        refTimer(this[timerId]);      }    }
    removeEventListener(...args) {      super.removeEventListener(...args);      if (this[timerId] !== null && listenerCount(this, "abort") === 0) {        unrefTimer(this[timerId]);      }    }  }  defineEventHandler(AbortSignal.prototype, "abort");
  webidl.configurePrototype(AbortSignal);  const AbortSignalPrototype = AbortSignal.prototype;
  class AbortController {    [signal] = new AbortSignal(illegalConstructorKey);
    constructor() {      this[webidl.brand] = webidl.brand;    }
    get signal() {      webidl.assertBranded(this, AbortControllerPrototype);      return this[signal];    }
    abort(reason) {      webidl.assertBranded(this, AbortControllerPrototype);      this[signal][signalAbort](reason);    }  }
  webidl.configurePrototype(AbortController);  const AbortControllerPrototype = AbortController.prototype;
  webidl.converters["AbortSignal"] = webidl.createInterfaceConverter(    "AbortSignal",    AbortSignal.prototype,  );
  function newSignal() {    return new AbortSignal(illegalConstructorKey);  }
  function follow(followingSignal, parentSignal) {    if (followingSignal.aborted) {      return;    }    if (parentSignal.aborted) {      followingSignal[signalAbort](parentSignal.reason);    } else {      parentSignal[add](() =>        followingSignal[signalAbort](parentSignal.reason)      );    }  }
  window.__bootstrap.abortSignal = {    AbortSignal,    AbortController,    AbortSignalPrototype,    add,    signalAbort,    remove,    follow,    newSignal,  };})(this);