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Atomics.isLockFree()

The Atomics.isLockFree() static method is used to determine whether the Atomics methods use locks or atomic hardware operations when applied to typed arrays with the given element byte size. It returns false if the given size is not one of the BYTES_PER_ELEMENT property of integer TypedArray types.

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Syntax

Atomics.isLockFree(size)

Parameters

size: The size in bytes to check.

Return value

A true or false value indicating whether the operation is lock free.

Examples

Using isLockFree

Atomics.isLockFree(1); // true
Atomics.isLockFree(2); // true
Atomics.isLockFree(3); // false
Atomics.isLockFree(4); // true
Atomics.isLockFree(5); // false
Atomics.isLockFree(6); // false
Atomics.isLockFree(7); // false
Atomics.isLockFree(8); // true

Specifications

Specification
ECMAScript Language Specification # sec-atomics.islockfree

Browser compatibility

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	Deno	Node.js
`isLockFree`	68	79	78	55	15.2	89	79	63	15.2	15.0	89	1.0	8.10.0