Baseline Widely available
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 is intended as an optimization primitive, so that high-performance algorithms can determine whether to use locks or atomic operations in critical sections. If an atomic primitive is not lock-free, it is often more efficient for an algorithm to provide its own locking.
console.log(Atomics.isLockFree(3));
// 3 is not one of the BYTES_PER_ELEMENT values
// Expected output: false
console.log(Atomics.isLockFree(4));
// 4 is one of the BYTES_PER_ELEMENT values
// Expected output: true
size
The size in bytes to check.
A true or false value indicating whether the operation is lock free.
true if size is 4, because all known platforms support 4-byte atomic operations.false if the given size is not one of the BYTES_PER_ELEMENT property of integer TypedArray types.Atomics.isLockFree(1); // true (platform-dependent)
Atomics.isLockFree(2); // true (platform-dependent)
Atomics.isLockFree(3); // false
Atomics.isLockFree(4); // true
Atomics.isLockFree(5); // false
Atomics.isLockFree(6); // false
Atomics.isLockFree(7); // false
Atomics.isLockFree(8); // true (platform-dependent)
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