zigbee-herdsman
Version:
An open source Zigbee gateway solution with node.js.
67 lines • 2.05 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.Queue = void 0;
class Queue {
#concurrent;
#jobs = [];
#running = 0;
constructor(concurrent = 1) {
this.#concurrent = concurrent;
}
async execute(func, key) {
const job = { key, running: false };
this.#jobs.push(job);
// Minor optimization/workaround: various tests like the idea that a job that is immediately runnable is run without an event loop spin.
// This also helps with stack traces in some cases, so avoid an `await` if we can help it.
if (this.#getNext() !== job) {
await new Promise((resolve) => {
job.start = () => {
job.running = true;
this.#running += 1;
resolve();
};
this.#executeNext();
});
}
else {
job.running = true;
this.#running += 1;
}
try {
return await func();
}
finally {
this.#jobs.splice(this.#jobs.indexOf(job), 1);
this.#running = Math.max(this.#running - 1, 0);
this.#executeNext();
}
}
#executeNext() {
const job = this.#getNext();
if (job) {
// biome-ignore lint/style/noNonNullAssertion: if we get here, start is always defined for job
job.start();
}
}
#getNext() {
if (this.#running > this.#concurrent - 1) {
return undefined;
}
for (let i = 0; i < this.#jobs.length; i++) {
const job = this.#jobs[i];
if (!job.running && (!job.key || !this.#jobs.find((j) => j.key === job.key && j.running))) {
return job;
}
}
return undefined;
}
clear() {
this.#running = 0;
this.#jobs.length = 0;
}
count() {
return this.#jobs.length;
}
}
exports.Queue = Queue;
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