// ------------------------------------------------------------------------------------------------
#define LinkData(link,T,m) \
    (T *)((char *)(link) - (unsigned int)(&(((T*)0)->m)))

// ------------------------------------------------------------------------------------------------
#define ListForEach(it, list, m) \
    for (it = LinkData((list).next, typeof(*it), m); \
        &it->m != &(list); \
        it = LinkData(it->m.next, typeof(*it), m))

// ------------------------------------------------------------------------------------------------
#define ListForEachSafe(it, n, list, m) \
    for (it = LinkData((list).next, typeof(*it), m), \
        n = LinkData(it->m.next, typeof(*it), m); \
        &it->m != &(list); \
        it = n, \
        n = LinkData(n->m.next, typeof(*it), m))