import { LockfileOptions } from './lockfile';
export declare type ReadStatus = {
    status: 'open';
    file: string;
} | {
    status: 'write_lock';
    job: Job;
    file: string;
};
export declare type WriteStatus = ReadStatus | {
    status: 'read_lock';
    file: string;
    jobs: Job[];
};
export declare type Status = WriteStatus;
export interface RWLockOptions {
    reason?: string;
    ifLocked?: IfLockedFn;
    timeout?: number;
    retryInterval?: number;
}
export interface RWLockfileOptions extends LockfileOptions {
    timeout?: number;
    retryInterval?: number;
    ifLocked?: IfLockedFn;
}
export declare type RWLockType = 'read' | 'write';
export interface Job {
    uuid: string;
    pid: number;
    reason?: string;
    created: Date;
}
export interface IfLockedFn {
    ({status}: {
        status: Status;
    }): Promise<void> | void;
}
export declare class RWLockfile {
    base: string;
    ifLocked: IfLockedFn;
    timeout: number;
    retryInterval: number;
    private _debug;
    private uuid;
    private fs;
    private internal;
    private _count;
    /**
     * creates a new read/write lockfile
     * @param base {string} - base filepath to create lock from
     */
    constructor(base: string, options?: RWLockfileOptions);
    readonly count: {
        readonly read: number;
        readonly write: number;
    };
    readonly file: string;
    add(type: RWLockType, opts?: RWLockOptions): Promise<void>;
    addSync(type: RWLockType, opts?: {
        reason?: string;
    }): void;
    remove(type: RWLockType): Promise<void>;
    removeSync(type: RWLockType): void;
    unlock(type?: RWLockType): Promise<void>;
    unlockSync(type?: RWLockType): void;
    check(type: RWLockType): Promise<Status>;
    checkSync(type: RWLockType): Status;
    private _statusFromFile(type, f);
    private _parseFile(input);
    private _stringifyFile(input);
    private _fetchFile();
    private _fetchFileSync();
    private addJob(type, reason, f);
    private _removeJob(type);
    private _removeJobSync(type);
    private _removeJobFromFile(type, f);
    private _lock(type, opts);
    tryLock(type: RWLockType, reason?: string, inc?: boolean): Promise<void>;
    private _lockSync(type, reason?);
    private writeFile(f);
    private writeFileSync(f);
    private readonly debug;
    private _debugReport(action, type, {reason}?);
}
export default RWLockfile;