export interface SemaphoreAwaiter<T = any> {
    executor(): Promise<T> | T;
    resolve(value: T): void;
    reject(error: Error): void;
}
export declare class Semaphore {
    #private;
    private readonly concurrency;
    private readonly delay;
    private readonly awaiters;
    private running;
    constructor(concurrency?: number, delay?: number);
    run<T = any>(executor: () => Promise<T> | T): Promise<T>;
}