33   enum class LockState : FutexWordType {  enum
43         futex_word(FutexWordType(LockState::Free)) {}  in Mutex()
52     mutex->futex_word.set(FutexWordType(LockState::Free));  in init()
63       FutexWordType mutex_status = FutexWordType(LockState::Free);  in lock()
64       FutexWordType locked_status = FutexWordType(LockState::Locked);  in lock()
67               mutex_status, FutexWordType(LockState::Locked))) {  in lock()
69           futex_word = FutexWordType(LockState::Waiting);  in lock()
73       switch (LockState(mutex_status)) {  in lock()
74       case LockState::Waiting:  in lock()
80                              FutexWordType(LockState::Waiting), 0, 0, 0);  in lock()
84       case LockState::Locked:  in lock()
88                 locked_status, FutexWordType(LockState::Waiting))) {  in lock()
94                                FutexWordType(LockState::Waiting), 0, 0, 0);  in lock()
98       case LockState::Free:  in lock()
107       FutexWordType mutex_status = FutexWordType(LockState::Waiting);  in unlock()
109                                              FutexWordType(LockState::Free))) {  in unlock()
116       if (mutex_status == FutexWordType(LockState::Locked)) {  in unlock()
119                                                FutexWordType(LockState::Free)))  in unlock()