import { InferenceSession } from './inference-session';
import { OnnxValue } from './onnx-value';
/**
 * @internal
 */
export declare namespace SessionHandler {
    type FeedsType = {
        [name: string]: OnnxValue;
    };
    type FetchesType = {
        [name: string]: OnnxValue | null;
    };
    type ReturnType = {
        [name: string]: OnnxValue;
    };
}
/**
 * Represent a handler instance of an inference session.
 *
 * @internal
 */
export interface SessionHandler {
    dispose(): Promise<void>;
    readonly inputNames: readonly string[];
    readonly outputNames: readonly string[];
    startProfiling(): void;
    endProfiling(): void;
    run(feeds: SessionHandler.FeedsType, fetches: SessionHandler.FetchesType, options: InferenceSession.RunOptions): Promise<SessionHandler.ReturnType>;
}
/**
 * Represent a backend that provides implementation of model inferencing.
 *
 * @internal
 */
export interface Backend {
    /**
     * Initialize the backend asynchronously. Should throw when failed.
     */
    init(): Promise<void>;
    createSessionHandler(uriOrBuffer: string | Uint8Array, options?: InferenceSession.SessionOptions): Promise<SessionHandler>;
}
export { registerBackend } from './backend-impl';