Martin Milata <mmilata(a)redhat.com> writes:
+/*
+ * Struct member access using offsets. The second variant is useful for nested
+ * structures.
+ *
+ * MEMB_T(type, offsetof(typeof(st), member)) == (type)(st->member)
+ * MEMB(st, offsetof(typeof(st), member)) == (void*)(st->member)
+ */
+#define MEMB_T(type, st, off) *(type *)((char*)st + off)
+#define MEMB(st, off) MEMB_T(void*, st, off)
/**
* container_of - cast a member of a structure out to the containing structure
* @ptr: the pointer to the member.
* @type: the type of the container struct this is embedded in.
* @member: the name of the member within the struct.
*
*/
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
#define memb_entry(ptr, type, member) \
container_of(ptr, type, member)
hmm?
--
Nikola