diff options
| author | Ammar Faizi <ammarfaizi2@gnuweeb.org> | 2022-03-29 17:17:34 +0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-04-20 17:05:46 -0700 |
| commit | 5a18d07ce3006dbcb3c4cfc7bf1c094a5da19540 (patch) | |
| tree | 733f0c3e19f7e9717bb29b31a718fb6a97ef56d3 /tools/include/nolibc | |
| parent | 544fa1a2d3e61c954ab531f2c790bc79c1745606 (diff) | |
| download | linux-5a18d07ce3006dbcb3c4cfc7bf1c094a5da19540.tar.bz2 | |
tools/nolibc/types: Implement `offsetof()` and `container_of()` macro
Implement `offsetof()` and `container_of()` macro. The first use case
of these macros is for `malloc()`, `realloc()` and `free()`.
Acked-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'tools/include/nolibc')
| -rw-r--r-- | tools/include/nolibc/types.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/include/nolibc/types.h b/tools/include/nolibc/types.h index 357e60ad38a8..959997034e55 100644 --- a/tools/include/nolibc/types.h +++ b/tools/include/nolibc/types.h @@ -191,4 +191,15 @@ struct stat { #define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff)) #define minor(dev) ((unsigned int)(((dev) & 0xff)) +#ifndef offsetof +#define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD) +#endif + +#ifndef container_of +#define container_of(PTR, TYPE, FIELD) ({ \ + __typeof__(((TYPE *)0)->FIELD) *__FIELD_PTR = (PTR); \ + (TYPE *)((char *) __FIELD_PTR - offsetof(TYPE, FIELD)); \ +}) +#endif + #endif /* _NOLIBC_TYPES_H */ |