| // Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'dart:ffi'; |
| |
| import "package:expect/expect.dart"; |
| import "package:ffi/ffi.dart"; |
| |
| final class COMObject extends Struct { |
| external Pointer<IntPtr> lpVtbl; |
| |
| // This should not be interpreted as a native field. |
| Pointer<IntPtr> get vtable => Pointer.fromAddress(lpVtbl.value); |
| } |
| |
| void main() { |
| Expect.equals(sizeOf<Pointer>(), sizeOf<COMObject>()); |
| |
| final comObjectPointer = calloc<COMObject>(); |
| final vTablePointer = calloc<IntPtr>(); |
| vTablePointer.value = 1234; |
| final comObject = comObjectPointer.ref; |
| comObject.lpVtbl = vTablePointer; |
| Expect.equals(1234, comObject.vtable.address); |
| calloc.free(comObjectPointer); |
| calloc.free(vTablePointer); |
| } |