hexo/node_modules/es-abstract/2018/DetachArrayBuffer.js

44 lines
1.6 KiB
JavaScript

'use strict';
var GetIntrinsic = require('get-intrinsic');
var $SyntaxError = GetIntrinsic('%SyntaxError%');
var $TypeError = GetIntrinsic('%TypeError%');
var isArrayBuffer = require('is-array-buffer');
var isSharedArrayBuffer = require('is-shared-array-buffer');
var MessageChannel;
try {
// eslint-disable-next-line global-require
MessageChannel = require('worker_threads').MessageChannel;
} catch (e) { /**/ }
// https://262.ecma-international.org/9.0/#sec-detacharraybuffer
/* globals postMessage */
module.exports = function DetachArrayBuffer(arrayBuffer) {
if (!isArrayBuffer(arrayBuffer) || isSharedArrayBuffer(arrayBuffer)) {
throw new $TypeError('Assertion failed: `arrayBuffer` must be an Object with an [[ArrayBufferData]] internal slot, and not a Shared Array Buffer');
}
// commented out since there's no way to set or access this key
// var key = arguments.length > 1 ? arguments[1] : void undefined;
// if (!SameValue(arrayBuffer[[ArrayBufferDetachKey]], key)) {
// throw new $TypeError('Assertion failed: `key` must be the value of the [[ArrayBufferDetachKey]] internal slot of `arrayBuffer`');
// }
if (typeof structuredClone === 'function') {
structuredClone(arrayBuffer, { transfer: [arrayBuffer] });
} else if (typeof postMessage === 'function') {
postMessage('', '/', [arrayBuffer]); // TODO: see if this might trigger listeners
} else if (MessageChannel) {
(new MessageChannel()).port1.postMessage(null, [arrayBuffer]);
} else {
throw new $SyntaxError('DetachArrayBuffer is not supported in this environment');
}
return null;
};