import type { EmscriptenModule, WasmFnPtr } from './types.js';
import { HandleTable } from './handle-table.js';
/**
 * Manages WASM callback function pointers and JS state handles.
 *
 * Uses the Emscripten module's native addFunction/removeFunction
 * for callback registration. Tracks all outstanding pointers for
 * bulk cleanup via dispose().
 */
export declare class CallbackRegistry {
    private readonly mod;
    readonly handles: HandleTable<unknown>;
    private readonly ptrs;
    constructor(mod: EmscriptenModule);
    addCallback(sig: string, fn: Function): WasmFnPtr;
    removeCallback(ptr: WasmFnPtr): void;
    createHandle<T>(value: T): number;
    getHandle<T>(id: number): T;
    deleteHandle(id: number): void;
    dispose(): void;
    get outstandingCallbacks(): number;
    get outstandingHandles(): number;
}
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