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