type Universe = Buffer;
type DriverFactory = (universe: Universe) => Driver;
type Driver = () => Promise<void>;
declare const UNIVERSE_SIZE = 512;
declare const MAX_VALUE = 255;
declare function deferred<T>(): {
    promise: Promise<T>;
    resolve: (value: T) => void;
};
/**
 * @example
 * ```ts
 * const lock = createAsyncLock();
 *
 * await lock.run(async () => {
 *  //
 * });
 *
 * lock.isLocked(); // false
 *
 * void lock.run(async () => {
 * //
 * });
 *
 * lock.isLocked(); // true
 *
 * await lock.flush();
 *
 * lock.isLocked(); // false
 * ```
 */
declare function createAsyncLock(): {
    run<T>(fn: () => Promise<T>): Promise<T>;
    isLocked(): boolean;
    flush: () => Promise<void>;
};

export { type Driver, type DriverFactory, MAX_VALUE, UNIVERSE_SIZE, type Universe, createAsyncLock, deferred };