guid_block
const struct guid_block *gblock;
gblock = (const struct guid_block *)obj->buffer.pointer;
total = obj->buffer.length / sizeof(struct guid_block);
struct guid_block *block;
struct guid_block *block;
static_assert(sizeof(typeof_member(struct guid_block, guid)) == 16);
static_assert(sizeof(struct guid_block) == 20);
static_assert(__alignof__(struct guid_block) == 1);
struct guid_block *block = &wblock->gblock;
struct guid_block gblock;