import type { KeyCode } from "./terminal/input";
export declare class Semaphore {
    private readonly listeners;
    attach(listener: () => void): void;
    detach(listener: () => void): void;
    signal(): void;
}
/**
 * Types admissable to the Lua side
 */
export type LuaValue = number | string | boolean;
/**
 * An object on which one can perform computer actions.
 */
export interface ComputerActionable {
    /**
     * Queue an event on the computer
     */
    queueEvent(event: string, args: Array<LuaValue>): void;
    /**
     * Fire a {@code key} event.
     *
     * @param key The key code. This can be translated to a suitable numeric value.
     * @param repeat Whether this is a repeated key.
     * @see #queueEvent
     */
    keyDown(key: KeyCode, repeat: boolean): void;
    /**
     * Fire a {@code key_up} event.
     *
     * @param key The key code. This can be translated to a suitable numeric value.
     * @see #queueEvent
     */
    keyUp(key: KeyCode): void;
    /**
     * Turn on the computer
     */
    turnOn(): void;
    /**
     * Shut down the computer
     */
    shutdown(): void;
    /**
     * Reboot the computer
     */
    reboot(): void;
    /**
     * Transfer some files to this computer.
     *
     * @param files A list of files and their contents.
     */
    transferFiles(files: Array<{
        name: string;
        contents: ArrayBuffer;
    }>): void;
}