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| author | Alex Richardson <Alexander.Richardson@cl.cam.ac.uk> | 2021-07-12 15:39:59 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-07-17 14:10:07 +0300 |
| commit | f3a8f603a702b10f13f0fad7c0c815b21fb2384a (patch) | |
| tree | 083b4a45cbcd1f0cda1fd75f7a1621601fe09e45 | |
| parent | 7210e907858be23a207479e26fde947e968b7f29 (diff) | |
| download | opensbi-f3a8f603a702b10f13f0fad7c0c815b21fb2384a.tar.xz | |
include: types: Use __builtin_offsetof when supported
Clang provides a __builtin_offsetof which can be detected using
__has_builtin().
Signed-off-by: Alex Richardson <Alexander.Richardson@cl.cam.ac.uk>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
| -rw-r--r-- | include/sbi/sbi_types.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/sbi/sbi_types.h b/include/sbi/sbi_types.h index 38e3565..7fb1af7 100644 --- a/include/sbi/sbi_types.h +++ b/include/sbi/sbi_types.h @@ -68,8 +68,14 @@ typedef unsigned long physical_size_t; #define likely(x) __builtin_expect((x), 1) #define unlikely(x) __builtin_expect((x), 0) +#ifndef __has_builtin +#define __has_builtin(...) 0 +#endif + #undef offsetof -#ifdef __compiler_offsetof +#if __has_builtin(__builtin_offsetof) +#define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE,MEMBER) +#elif defined(__compiler_offsetof) #define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE,MEMBER) #else #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) |