@cc-heart/utils/dist/cjs/hooks/useConcurrency.cjs

🔧 javascript common tools collection

'use strict';

var validate = require('../lib/validate.cjs');

async function useConcurrency(tasks, maxConcurrency) {
    if (validate.isUndef(maxConcurrency)) {
        console.warn('maxConcurrency is undefined');
        return null;
    }
    const ret = [];
    const excluding = [];
    for (let i = 0; i < tasks.length; i++) {
        const res = tasks[i]();
        ret.push(res);
        if (maxConcurrency < tasks.length) {
            const p = res.then(() => excluding.splice(excluding.indexOf(p), 1));
            excluding.push(p);
            if (excluding.length >= maxConcurrency) {
                await Promise.race(excluding);
            }
        }
    }
    return Promise.all(ret);
}

exports.useConcurrency = useConcurrency;