import type { MessagePort, Worker } from 'node:worker_threads';
import type { READY } from './common';
import type { kTransferable, kValue } from './symbols';
export interface StartupMessage {
    filename: string | null;
    name: string;
    port: MessagePort;
    sharedBuffer: Int32Array;
    useAtomics: boolean;
    niceIncrement: number;
}
export interface RequestMessage {
    taskId: number;
    task: any;
    filename: string;
    name: string;
}
export interface ReadyMessage {
    [READY]: true;
}
export interface ResponseMessage {
    taskId: number;
    result: any;
    error: Error | null;
}
export declare const commonState: {
    isWorkerThread: boolean;
    workerData: undefined;
};
export interface Transferable {
    readonly [kTransferable]: object;
    readonly [kValue]: object;
}
export interface HistogramSummary {
    average: number;
    mean: number;
    stddev: number;
    min: number;
    max: number;
    p0_001: number;
    p0_01: number;
    p0_1: number;
    p1: number;
    p2_5: number;
    p10: number;
    p25: number;
    p50: number;
    p75: number;
    p90: number;
    p97_5: number;
    p99: number;
    p99_9: number;
    p99_99: number;
    p99_999: number;
}
export type ResourceLimits = Worker extends {
    resourceLimits?: infer T;
} ? T : {};
export type EnvSpecifier = typeof Worker extends {
    new (filename: never, options?: {
        env: infer T;
    }): Worker;
} ? T : never;