47 lines
1.7 KiB
JavaScript
47 lines
1.7 KiB
JavaScript
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'use strict';
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var $SyntaxError = require('es-errors/syntax');
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var $TypeError = require('es-errors/type');
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var IsDetachedBuffer = require('./IsDetachedBuffer');
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var isArrayBuffer = require('is-array-buffer');
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var isSharedArrayBuffer = require('is-shared-array-buffer');
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var MessageChannel;
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try {
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// eslint-disable-next-line global-require
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MessageChannel = require('worker_threads').MessageChannel;
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} catch (e) { /**/ }
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// https://262.ecma-international.org/9.0/#sec-detacharraybuffer
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/* globals postMessage */
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module.exports = function DetachArrayBuffer(arrayBuffer) {
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if (!isArrayBuffer(arrayBuffer) || isSharedArrayBuffer(arrayBuffer)) {
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throw new $TypeError('Assertion failed: `arrayBuffer` must be an Object with an [[ArrayBufferData]] internal slot, and not a Shared Array Buffer');
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}
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// commented out since there's no way to set or access this key
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// var key = arguments.length > 1 ? arguments[1] : void undefined;
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// if (!SameValue(arrayBuffer[[ArrayBufferDetachKey]], key)) {
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// throw new $TypeError('Assertion failed: `key` must be the value of the [[ArrayBufferDetachKey]] internal slot of `arrayBuffer`');
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// }
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if (!IsDetachedBuffer(arrayBuffer)) { // node v21.0.0+ throws when you structuredClone a detached buffer
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if (typeof structuredClone === 'function') {
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structuredClone(arrayBuffer, { transfer: [arrayBuffer] });
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} else if (typeof postMessage === 'function') {
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postMessage('', '/', [arrayBuffer]); // TODO: see if this might trigger listeners
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} else if (MessageChannel) {
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(new MessageChannel()).port1.postMessage(null, [arrayBuffer]);
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} else {
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throw new $SyntaxError('DetachArrayBuffer is not supported in this environment');
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}
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}
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return null;
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};
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