export type ShutdownHandler = () => Promise<void> | void;
export declare const DEFAULT_SHUTDOWN_TIMEOUT_MS = 10000;
export declare class ShutdownManager {
    private timeoutMs;
    private handlers;
    private isShuttingDown;
    private shutdownPromise?;
    private requestedExitCode?;
    private sigintHandler?;
    private sigtermHandler?;
    private seenSignals;
    constructor(timeoutMs?: number);
    register(handler: ShutdownHandler, priority: number): void;
    unregister(handler: ShutdownHandler): void;
    shutdown(exitCode?: number): Promise<void>;
    get active(): boolean;
    setupSignalHandlers(): void;
    removeSignalHandlers(): void;
    private detachSignalHandler;
    private handleSignal;
    private updateRequestedExitCode;
    private executeShutdown;
    private runHandlersWithTimeout;
    private executeHandlers;
}