/**
 * Promise-based lock implementation.
 *
 * When someone tries to acquire a {@link Lock} they receive a promise for a release callback that is fulfilled as soon
 * as previous lock owner invokes their release callback.
 *
 * @see https://en.wikipedia.org/wiki/Lock_(computer_science) Lock (computer science)
 */
export declare class Lock {
    private _promise?;
    /**
     * `true` if {@link Lock} was acquired and wasn't released yet.
     */
    get isLocked(): boolean;
    /**
     * Waits for the {@link Lock} to become available and fulfills it with the callback that releases the lock.
     */
    acquire(): Promise<() => void>;
}