Last change
on this file since 84d0fbb was e29cc2e, checked in by Ema <ema_spirova@…>, 3 years ago |
primeNG components
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Property mode
set to
100644
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File size:
1.1 KB
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[6a3a178] | 1 | 'use strict';
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[e29cc2e] | 2 | const pTry = require('p-try');
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[6a3a178] | 3 |
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| 4 | const pLimit = concurrency => {
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| 5 | if (!((Number.isInteger(concurrency) || concurrency === Infinity) && concurrency > 0)) {
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[e29cc2e] | 6 | return Promise.reject(new TypeError('Expected `concurrency` to be a number from 1 and up'));
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[6a3a178] | 7 | }
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| 8 |
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[e29cc2e] | 9 | const queue = [];
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[6a3a178] | 10 | let activeCount = 0;
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| 11 |
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| 12 | const next = () => {
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| 13 | activeCount--;
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| 14 |
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[e29cc2e] | 15 | if (queue.length > 0) {
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| 16 | queue.shift()();
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[6a3a178] | 17 | }
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| 18 | };
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| 19 |
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[e29cc2e] | 20 | const run = (fn, resolve, ...args) => {
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[6a3a178] | 21 | activeCount++;
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| 22 |
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[e29cc2e] | 23 | const result = pTry(fn, ...args);
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[6a3a178] | 24 |
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| 25 | resolve(result);
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| 26 |
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[e29cc2e] | 27 | result.then(next, next);
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[6a3a178] | 28 | };
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| 29 |
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| 30 | const enqueue = (fn, resolve, ...args) => {
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[e29cc2e] | 31 | if (activeCount < concurrency) {
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| 32 | run(fn, resolve, ...args);
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| 33 | } else {
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| 34 | queue.push(run.bind(null, fn, resolve, ...args));
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| 35 | }
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[6a3a178] | 36 | };
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| 37 |
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[e29cc2e] | 38 | const generator = (fn, ...args) => new Promise(resolve => enqueue(fn, resolve, ...args));
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[6a3a178] | 39 | Object.defineProperties(generator, {
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| 40 | activeCount: {
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| 41 | get: () => activeCount
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| 42 | },
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| 43 | pendingCount: {
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[e29cc2e] | 44 | get: () => queue.length
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[6a3a178] | 45 | },
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| 46 | clearQueue: {
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| 47 | value: () => {
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[e29cc2e] | 48 | queue.length = 0;
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[6a3a178] | 49 | }
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| 50 | }
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| 51 | });
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| 52 |
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| 53 | return generator;
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| 54 | };
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| 55 |
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| 56 | module.exports = pLimit;
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[e29cc2e] | 57 | module.exports.default = pLimit;
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