cu/inherit.h: A Framework for Multiple Inheritance
[Basics]

Defines
#define	CU_MARG(ptr_t, ptr)   ((ptr_t)(1? (ptr_t)(ptr) : (ptr)))
#define	CU_BASE_FIELD(base_s)   _base_##base_s
#define	cu_inherit(base_s)   struct base_s CU_BASE_FIELD(base_s)
#define	cu_inherit_virtual(base_s)   struct base_s *_vbase_##base_s
#define	cu_set_virtual(base_s, ptr, vbase)   ((void)((ptr)->_vbase_##base_s = vbase))
#define	cu_base_offset(sup, base)   offsetof(struct sup, _base_##base)
#define	cu_to(b1, o)   (&(o)->CU_BASE_FIELD(b1))
#define	cu_to2(b2, b1, o)   cu_to(b2, cu_to(b1, o))
#define	cu_to3(b3, b2, b1, o)   cu_to(b3, cu_to2(b2, b1, o))
#define	cu_to4(b4, b3, b2, b1, o)   cu_to(b4, cu_to3(b3, b2, b1, o))
#define	cu_to5(b5, b4, b3, b2, b1, o)   cu_to(b5, cu_to4(b4, b3, b2, b1, o))
#define	cu_to_virtual(base_s, o)   ((o)->_vbase_##base_s)
#define	cu_from(s1, s0, o)
#define	cu_from2(s2, s1, s0, o)   cu_from(s2, s1, cu_from(s1, s0, o))
#define	cu_from3(s3, s2, s1, s0, o)   cu_from(s3, s2, cu_from2(s2, s1, s0, o))
#define	cu_from4(s4, s3, s2, s1, s0, o)   cu_from(s4, s3, cu_from3(s3, s2, s1, s0, o))
#define	cu_from5(s0, s1, s2, s3, s4, s5, o)   cu_sub(s0, s1, cu_sub4(s1, s2, s3, s4, s5, (o)))

---

Define Documentation

#define cu_from	(	s1,
		s0,
		o		)

Value:

((struct s1 *)((char *)CU_MARG(struct s0 *, o) \
                   - offsetof(struct s1, _base_##s0)))