Messages in this thread Patch in this message | | | From | Tomeu Vizoso <> | Subject | [RFC PATCH 01/16] typecheck_member and offsetof_t | Date | Tue, 21 Jul 2015 15:50:43 +0200 |
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Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> ---
include/linux/stddef.h | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/include/linux/stddef.h b/include/linux/stddef.h index 9c61c7cda936..e60bd164c03a 100644 --- a/include/linux/stddef.h +++ b/include/linux/stddef.h @@ -27,4 +27,11 @@ enum { #define offsetofend(TYPE, MEMBER) \ (offsetof(TYPE, MEMBER) + sizeof(((TYPE *)0)->MEMBER)) +#define typecheck_member(TYPE, MEMBER, MEMBERTYPE) \ + ((size_t)(&((TYPE *)0)->MEMBER - (MEMBERTYPE*)0) ? 0 : 0) + +/* like offsetof(), but ensures that MEMBER is of type MEMBERTYPE */ +#define offsetof_t(TYPE, MEMBER, MEMBERTYPE) \ + (typecheck_member(TYPE, MEMBER, MEMBERTYPE) + offsetof(TYPE, MEMBER)) + #endif -- 2.4.3
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