Software: Apache/2.4.41 (Ubuntu). PHP/8.0.30 

uname -a: Linux apirnd 5.4.0-204-generic #224-Ubuntu SMP Thu Dec 5 13:38:28 UTC 2024 x86_64 

uid=33(www-data) gid=33(www-data) groups=33(www-data) 

Safe-mode: OFF (not secure)

/var/www/html/queuepro/node_modules/webpack/lib/util/   drwxrwxr-x
Free 13.17 GB of 57.97 GB (22.73%)
                            Encoder    Tools    Proc.    FTP brute    Sec.    SQL    PHP-code    Update    Self remove    Logout    

Viewing file:     Semaphore.js (1008 B)      -rwxrwxr-x

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/

"use strict";

class Semaphore {
	/**
	 * Creates an instance of Semaphore.
	 *
	 * @param {number} available the amount available number of "tasks"
	 * in the Semaphore
	 */
	constructor(available) {
		this.available = available;
		/** @type {(function(): void)[]} */
		this.waiters = [];
		/** @private */
		this._continue = this._continue.bind(this);
	}

	/**
	 * @param {function(): void} callback function block to capture and run
	 * @returns {void}
	 */
	acquire(callback) {
		if (this.available > 0) {
			this.available--;
			callback();
		} else {
			this.waiters.push(callback);
		}
	}

	release() {
		this.available++;
		if (this.waiters.length > 0) {
			process.nextTick(this._continue);
		}
	}

	_continue() {
		if (this.available > 0) {
			if (this.waiters.length > 0) {
				this.available--;
				const callback = this.waiters.pop();
				callback();
			}
		}
	}
}

module.exports = Semaphore;