| //===-- Definition of the containerof macro -------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIBC_MACROS_CONTAINEROF_MACRO_H |
| #define LLVM_LIBC_MACROS_CONTAINEROF_MACRO_H |
| |
| #include "llvm-libc-macros/offsetof-macro.h" |
| |
| #define __containerof(ptr, type, member) \ |
| ({ \ |
| const __typeof(((type *)0)->member) *__ptr = (ptr); \ |
| (type *)(void *)((const char *)__ptr - offsetof(type, member)); \ |
| }) |
| |
| #endif // LLVM_LIBC_MACROS_CONTAINEROF_MACRO_H |