/// <reference types="node" />
import { EventEmitter } from 'events';
export declare class Timer<T> extends EventEmitter {
    protected cb: () => T;
    protected running: Promise<any>;
    protected started: boolean;
    private ticking;
    protected time: number;
    protected timer: number;
    constructor(cb: () => T);
    immediately(): any;
    interval(ms: number): void;
    start(ms?: number): Promise<T>;
    stop(): void;
    protected delay(): Promise<any>;
    protected delayNext(): void;
    private handleError(e);
    private reset();
    protected tick(): Promise<any>;
    readonly isRunning: boolean;
}
export declare type Timeout = Promise<void> & {
    kill(asSuccess?: boolean): void;
};
export declare function timeout(ms: number): Timeout;