'use strict';

const threads = require('node:worker_threads');

const { Worker, isMainThread } = threads;

if (isMainThread) {

const buffer = new SharedArrayBuffer(10);

new Worker(__filename, { workerData: buffer });

new Worker(__filename, { workerData: buffer });

} else {

const { threadId, workerData } = threads;

const array = new Int8Array(workerData);

const value = threadId === 1 ? 1 : -1;

setInterval(() => {

for (let i = 0; i < 10; i++) {

array[i] += value;

}

console.dir([ threadId, array ]);

}, 100); // change to 10 to see race condition

}