From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 9 Oct 2024 16:00:31 +0000 (+0200)
Subject: macro: add voffsetof() helper, that operates like offsetof() but on variables
X-Git-Tag: v257-rc1~258^2~4
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=44fd4548b56865929a32bfdaf386e27d2ba864d4;p=thirdparty%2Fsystemd.git

macro: add voffsetof() helper, that operates like offsetof() but on variables
---

diff --git a/src/fundamental/macro-fundamental.h b/src/fundamental/macro-fundamental.h
index 913c8b253c6..7b797323262 100644
--- a/src/fundamental/macro-fundamental.h
+++ b/src/fundamental/macro-fundamental.h
@@ -549,6 +549,7 @@ static inline uint64_t ALIGN_OFFSET_U64(uint64_t l, uint64_t ali) {
 
 #define sizeof_field(struct_type, member) sizeof(((struct_type *) 0)->member)
 #define endoffsetof_field(struct_type, member) (offsetof(struct_type, member) + sizeof_field(struct_type, member))
+#define voffsetof(v, member) offsetof(typeof(v), member)
 
 #define _FOREACH_ARRAY(i, array, num, m, end)                           \
         for (typeof(array[0]) *i = (array), *end = ({                   \