The first use case of this macro is for data structure assertion at
compile time. It's like what we do in the io_uring.c in the kernel.
Signed-off-by: Ammar Faizi <ammarfaizi2@xxxxxxxxxxx>
---
src/lib.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/lib.h b/src/lib.h
index 40e2817..0db7499 100644
--- a/src/lib.h
+++ b/src/lib.h
@@ -26,6 +26,10 @@
#define BUILD_BUG_ON(EXPR) static_assert(!(EXPR), "!(" #EXPR ") failed")
#endif
+#ifndef sizeof_field
+#define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
+#endif
+
#ifndef offsetof
#define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD)
#endif
--
Ammar Faizi
