export interface FileLockOptions {
    timeoutMs?: number;
    staleMs?: number;
    retryMs?: number;
    label?: string;
}
/**
 * Serialize a short synchronous read-modify-write transaction across
 * processes. The owner token prevents an old holder from deleting a lock that
 * was recovered and reacquired by another process.
 */
export declare function withFileLock<T>(lockPath: string, operation: () => T, options?: FileLockOptions): T;