1 #undef LOCK 2 #define LOCK WL 3 4 #undef UNLOCK 5 #define UNLOCK WU 6 7 #undef RLOCK 8 #define RLOCK RL 9 10 #undef WLOCK 11 #define WLOCK WL 12 13 #undef INIT 14 #define INIT RWI 15