import { nil } from '@tb-dev/utils';
import { Handle, QueueOptions } from './types';
import { ffi_RequestId } from '@tsukilabs/nil-bindings';
export declare class Queue implements Disposable {
    private static readonly POLL_INTERVAL;
    private static readonly LIMIT_PER_TICK;
    private disposed;
    private readonly functions;
    private readonly emitter;
    private readonly requestId;
    private readonly pendingRequests;
    private timer;
    private readonly errorHandler;
    private readonly eventHandler;
    constructor(handle: Handle, options?: QueueOptions);
    [Symbol.dispose](): void;
    request<T = nil>(start: RequestFn): Promise<T>;
    private drain;
    private poll;
    private dispatch;
    private rejectAll;
    private clearTimeout;
    private onResponse;
}
type RequestFn = (requestId: ffi_RequestId) => void;
export {};