import type { OpfsSyncAccessHandle } from '../engine/file-system-storage.js';
import type { EngineModule } from './engine-module.js';
export interface SyncAccessFile {
    name: string;
    handle: OpfsSyncAccessHandle;
    size: number;
}
export interface SyncAccessMountOptions {
    files: SyncAccessFile[];
}
/**
 * Emscripten FS provider backed by OPFS sync access handles.
 *
 * Each mounted file maps to one open OpfsSyncAccessHandle. `read` calls
 * `handle.read(view, { at })` directly into a Uint8Array view of the wasm
 * heap — one copy from OPFS storage into wasm linear memory, no intermediate
 * ArrayBuffer in JS heap. Replaces the prior WORKERFS path which paid two
 * copies (FileReaderSync → ArrayBuffer → HEAPU8.set) per read.
 */
export declare function createSyncAccessHandleFS(module: EngineModule): unknown;