@remotion/renderer
Version:
Render Remotion videos using Node.js or Bun
58 lines (57 loc) • 1.87 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.pLimit = void 0;
const pLimit = (concurrency) => {
const queue = [];
let activeCount = 0;
const next = () => {
var _a;
activeCount--;
if (queue.length > 0) {
(_a = queue.shift()) === null || _a === void 0 ? void 0 : _a();
}
};
const run = async (fn, resolve, ...args) => {
activeCount++;
// eslint-disable-next-line require-await
const result = (async () => fn(...args))();
resolve(result);
try {
await result;
}
catch (_a) { }
next();
};
const enqueue = (fn, resolve, ...args) => {
queue.push(() => run(fn, resolve, ...args));
(async () => {
var _a;
// This function needs to wait until the next microtask before comparing
// `activeCount` to `concurrency`, because `activeCount` is updated asynchronously
// when the run function is dequeued and called. The comparison in the if-statement
// needs to happen asynchronously as well to get an up-to-date value for `activeCount`.
await Promise.resolve();
if (activeCount < concurrency && queue.length > 0) {
(_a = queue.shift()) === null || _a === void 0 ? void 0 : _a();
}
})();
};
const generator = (fn, ...args) => new Promise((resolve) => {
enqueue(fn, resolve, ...args);
});
Object.defineProperties(generator, {
activeCount: {
get: () => activeCount,
},
pendingCount: {
get: () => queue.length,
},
clearQueue: {
value: () => {
queue.length = 0;
},
},
});
return generator;
};
exports.pLimit = pLimit;