import { SPSC, SPSCError } from './common.js';
export { SPSCError };
type Uint8ArrayLike = {
    buffer: ArrayBuffer;
    byteOffset?: number;
    byteLength?: number;
};
interface _ReadOptions {
    nonblock: boolean;
    /** if set, read into this array buffer to omit allocation */
    into: Uint8ArrayLike;
}
export interface ReadOptions extends Partial<_ReadOptions> {
}
export type ReadResult = {
    ok: false;
    error: SPSCError;
} | {
    ok: true;
    bytesRead: number;
    data: Uint8Array;
};
export declare class SPSCReader extends SPSC {
    #private;
    readonly notifier?: MessagePort | undefined;
    readonly notifierToken?: unknown | undefined;
    constructor(sab: SharedArrayBuffer, notifier?: MessagePort | undefined, notifierToken?: unknown | undefined);
    close(): void;
    read(nbytes: number, options?: ReadOptions): ReadResult;
    bytesAvailable(): number;
    pollRead(timeout?: number): boolean;
}