Baseline Widely available
The Atomics.or() static method computes a bitwise OR with a given value at a given position in the array, and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.
// Create a SharedArrayBuffer with a size in bytes
const buffer = new SharedArrayBuffer(16);
const uint8 = new Uint8Array(buffer);
uint8[0] = 5;
// 5 (0101) OR 2 (0010) = 7 (0111)
console.log(Atomics.or(uint8, 0, 2));
// Expected output: 5
console.log(Atomics.load(uint8, 0));
// Expected output: 7
Atomics.or(typedArray, index, value)
typedArray
An integer typed array. One of Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array, BigInt64Array, or BigUint64Array.
index
The position in the typedArray to compute the bitwise OR.
value
The number to compute the bitwise OR with.
The old value at the given position (typedArray[index]).
TypeError
Thrown if typedArray is not one of the allowed integer types.
RangeError
Thrown if index is out of bounds in the typedArray.
The bitwise OR operation yields 1, if either a or b are 1. The truth table for the OR operation is:
a b a | b 0 0 0 0 1 1 1 0 1 1 1 1
For example, a bitwise OR of 5 | 1 results in 0101 which is 5 in decimal.
5 0101 1 0001 ---- 5 0101Examples Using or
const sab = new SharedArrayBuffer(1024);
const ta = new Uint8Array(sab);
ta[0] = 2;
Atomics.or(ta, 0, 1); // returns 2, the old value
Atomics.load(ta, 0); // 3
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4