import File from './types/files/file.js';
/**
 * Wrapper for an `async-mutex` {@link Semaphore} that limits how many files can be processed at
 * once per hard drive.
 */
export default class DriveSemaphore {
    private readonly driveSemaphores;
    private readonly driveSemaphoresMutex;
    private readonly threadsSemaphore;
    constructor(threads: number);
    getValue(): number;
    setValue(threads: number): void;
    /**
     * Run a {@link runnable} exclusively for the given {@link file}.
     */
    runExclusive<V>(file: File | string, runnable: () => V | Promise<V>): Promise<V>;
    /**
     * Run some {@link runnable} for every value in {@link files}.
     */
    map<K extends File | string, V>(files: K[], runnable: (file: K) => V | Promise<V>): Promise<V[]>;
    private static getDiskForFile;
}