import type { IDisposable } from '../lifecycle/dispose/disposable.js';
/**
 * 反复推迟的 setTimeout
 */
export declare class ExtendableTimer implements IDisposable {
    private readonly durationMs;
    private readonly dfd;
    private tmr?;
    constructor(durationMs: number);
    start(): void;
    renew(): void;
    private _set;
    cancel(): void;
    get p(): Promise<void>;
    get onSchedule(): <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>;
    readonly dispose: () => void;
}
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