import { FileSystem, BaseFileSystem } from '../core/file_system';
import { ApiError } from '../core/api_error';
import { FileFlag } from '../core/file_flag';
import { File } from '../core/file';
import { default as Stats } from '../core/node_fs_stats';
import { PreloadFile } from '../generic/preload_file';
import LockedFS from '../generic/locked_fs';
export declare class UnlockedOverlayFS extends BaseFileSystem implements FileSystem {
    private _writable;
    private _readable;
    private _isInitialized;
    private _initializeCallbacks;
    private _deletedFiles;
    private _deleteLog;
    private _deleteLogUpdatePending;
    private _deleteLogUpdateNeeded;
    private _deleteLogError;
    constructor(writable: FileSystem, readable: FileSystem);
    private checkInitialized();
    private checkInitAsync(cb);
    private checkPath(p);
    private checkPathAsync(p, cb);
    getOverlayedFileSystems(): {
        readable: FileSystem;
        writable: FileSystem;
    };
    private createParentDirectoriesAsync(p, cb);
    private createParentDirectories(p);
    static isAvailable(): boolean;
    _syncAsync(file: PreloadFile<UnlockedOverlayFS>, cb: (err: ApiError) => void): void;
    _syncSync(file: PreloadFile<UnlockedOverlayFS>): void;
    getName(): string;
    initialize(cb: (err?: ApiError) => void): void;
    isReadOnly(): boolean;
    supportsSynch(): boolean;
    supportsLinks(): boolean;
    supportsProps(): boolean;
    private deletePath(p);
    private updateLog(addition);
    getDeletionLog(): string;
    private _reparseDeletionLog();
    restoreDeletionLog(log: string): void;
    rename(oldPath: string, newPath: string, cb: (err?: ApiError) => void): void;
    renameSync(oldPath: string, newPath: string): void;
    stat(p: string, isLstat: boolean, cb: (err: ApiError, stat?: Stats) => void): void;
    statSync(p: string, isLstat: boolean): Stats;
    open(p: string, flag: FileFlag, mode: number, cb: (err: ApiError, fd?: File) => any): void;
    openSync(p: string, flag: FileFlag, mode: number): File;
    unlink(p: string, cb: (err: ApiError) => void): void;
    unlinkSync(p: string): void;
    rmdir(p: string, cb: (err?: ApiError) => void): void;
    rmdirSync(p: string): void;
    mkdir(p: string, mode: number, cb: (err: ApiError, stat?: Stats) => void): void;
    mkdirSync(p: string, mode: number): void;
    readdir(p: string, cb: (error: ApiError, files?: string[]) => void): void;
    readdirSync(p: string): string[];
    exists(p: string, cb: (exists: boolean) => void): void;
    existsSync(p: string): boolean;
    chmod(p: string, isLchmod: boolean, mode: number, cb: (error?: ApiError) => void): void;
    chmodSync(p: string, isLchmod: boolean, mode: number): void;
    chown(p: string, isLchmod: boolean, uid: number, gid: number, cb: (error?: ApiError) => void): void;
    chownSync(p: string, isLchown: boolean, uid: number, gid: number): void;
    utimes(p: string, atime: Date, mtime: Date, cb: (error?: ApiError) => void): void;
    utimesSync(p: string, atime: Date, mtime: Date): void;
    private operateOnWritable(p, f);
    private operateOnWritableAsync(p, cb);
    private copyToWritable(p);
    private copyToWritableAsync(p, cb);
}
export default class OverlayFS extends LockedFS<UnlockedOverlayFS> {
    constructor(writable: FileSystem, readable: FileSystem);
    initialize(cb: (err?: ApiError) => void): void;
    static isAvailable(): boolean;
    getOverlayedFileSystems(): {
        readable: FileSystem;
        writable: FileSystem;
    };
    unwrap(): UnlockedOverlayFS;
}