#define _c_block __u.__i[0]
#define _c_clock __u.__i[1]
#define _rw_wrlock __u.__i[0]
#define _rw_readers __u.__i[1]
#define _rw_waiters __u.__i[2]
#define _rw_owner __u.__i[3]
#define _c_block __u.__i[0]
#define _c_clock __u.__i[1]
#define _rw_wrlock __u.__i[0]
#define _rw_readers __u.__i[1]
#define _rw_waiters __u.__i[2]
#define _rw_owner __u.__i[3]