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1 | /*===---- __stddef_null.h - Definition of NULL -----------------------------=== |
---|---|
2 | * |
3 | * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | * See https://llvm.org/LICENSE.txt for license information. |
5 | * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | * |
7 | *===-----------------------------------------------------------------------=== |
8 | */ |
9 | |
10 | #if !defined(NULL) || !__has_feature(modules) |
11 | |
12 | /* linux/stddef.h will define NULL to 0. glibc (and other) headers then define |
13 | * __need_NULL and rely on stddef.h to redefine NULL to the correct value again. |
14 | * Modules don't support redefining macros like that, but support that pattern |
15 | * in the non-modules case. |
16 | */ |
17 | #undef NULL |
18 | |
19 | #ifdef __cplusplus |
20 | #if !defined(__MINGW32__) && !defined(_MSC_VER) |
21 | #define NULL __null |
22 | #else |
23 | #define NULL 0 |
24 | #endif |
25 | #else |
26 | #define NULL ((void*)0) |
27 | #endif |
28 | |
29 | #endif |
30 |
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