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| author | Cyrill Gorcunov <gorcunov@gmail.com> | 2018-07-19 15:47:30 +0300 |
|---|---|---|
| committer | Andrei Vagin <avagin@gmail.com> | 2018-10-30 19:27:55 +0300 |
| commit | e319aaa0cf489488d7796b6abea7f88a21d6e07f (patch) | |
| tree | 7c5341c2cd723b905a7a87142206f8eac677c397 /include | |
| parent | bc7d57ebadc00bff01e8e90ccc2600687eb6d025 (diff) | |
compiler: Add FIELD_SIZEOF helper
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Reviewed-by: Dmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/common/compiler.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/common/compiler.h b/include/common/compiler.h index ada79f293..eaf545b26 100644 --- a/include/common/compiler.h +++ b/include/common/compiler.h @@ -57,6 +57,10 @@ const typeof( ((type *)0)->member ) *__mptr = (ptr); \ (type *)( (char *)__mptr - offsetof(type,member) );}) +#ifndef FIELD_SIZEOF +# define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) +#endif + #define __round_mask(x, y) ((__typeof__(x))((y) - 1)) #define round_up(x, y) ((((x) - 1) | __round_mask(x, y)) + 1) #define round_down(x, y) ((x) & ~__round_mask(x, y)) |