@deftomat/opinionated/dist/esm/src/cpu.js

Opinionated tooling for JavaScript & TypeScript projects.

import os from 'node:os';
let currentlyRunning = 0;
const queue = [];
/**
 * "Allocates" one CPU core.
 */
export async function allocateCore() {
    const free = () => {
        currentlyRunning--;
        const startNext = queue.shift();
        if (startNext)
            startNext();
    };
    if (currentlyRunning < os.cpus().length) {
        currentlyRunning++;
        return Promise.resolve({ free });
    }
    return new Promise(resolve => {
        queue.push(() => {
            currentlyRunning++;
            resolve({ free });
        });
    });
}