21 const UPGRADED: u32 = 1 << 1;  constant
137         if value & (WRITER | UPGRADED) != 0 {  in inner_try_read()
165         return state / READER + (state & UPGRADED) / UPGRADED;  in reader_count()
235         if self.lock.fetch_or(UPGRADED, Ordering::Acquire) & (WRITER | UPGRADED) == 0 {  in inner_try_upgradeable_read()
271         debug_assert_eq!(self.lock.load(Ordering::Relaxed) & !(WRITER | UPGRADED), 0);  in force_write_unlock()
272         self.lock.fetch_and(!(WRITER | UPGRADED), Ordering::Release);  in force_write_unlock()
317             UPGRADED,  in try_upgrade()
429             self.inner.lock.load(Ordering::Acquire) & (WRITER | UPGRADED),  in downgrade_to_upgradeable()
433         self.inner.lock.store(UPGRADED, Ordering::Release);  in downgrade_to_upgradeable()
478         debug_assert!(self.lock.load(Ordering::Relaxed) & !(WRITER | UPGRADED) > 0);  in drop()
487             self.inner.lock.load(Ordering::Relaxed) & (WRITER | UPGRADED),  in drop()
488             UPGRADED  in drop()
490         self.inner.lock.fetch_sub(UPGRADED, Ordering::AcqRel);  in drop()
501             .fetch_and(!(WRITER | UPGRADED), Ordering::Release);  in drop()