| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_SAFE_ACCESS_H_ |
| #define FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_SAFE_ACCESS_H_ |
| |
| #include <type_traits> |
| |
| #define SAFE_ACCESS(pointer, member, default_value) \ |
| ([=]() { \ |
| if (offsetof(std::remove_pointer<decltype(pointer)>::type, member) + \ |
| sizeof(pointer->member) <= \ |
| pointer->struct_size) { \ |
| return pointer->member; \ |
| } \ |
| return static_cast<decltype(pointer->member)>((default_value)); \ |
| })() |
| |
| #endif // FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_SAFE_ACCESS_H_ |
