Method acquire

lib/util/Semaphore.js:34–41

* Acquires a permit for the callback immediately when one is available or * queues the callback until another task releases its permit. * @param {() => void} callback function block to capture and run * @returns {void}

(callback)

	 * @returns {void}
	 */
	acquire(callback) {
		if (this.available > 0) {
			this.available--;
			callback();
		} else {
			this.waiters.push(callback);
		}
	}

	/**
	 * Releases a permit and schedules the next waiting callback, if any.