31 pub(crate) struct Generation<C = cfg::DefaultConfig> {  struct
46 struct LifecycleGen<C>(Generation<C>);  argument
56 impl<C: cfg::Config> Pack<C> for Generation<C> {  implementation
57     /// Use all the remaining bits in the word for the generation counter, minus
75 impl<C: cfg::Config> Generation<C> {  impl
107     pub(crate) fn get(&self, gen: Generation<C>) -> Option<Guard<T, C>> {  in get()
124             // Is it okay to access this slot? The accessed generation must be  in get()
127             // generation, return `None`.  in get()
151                     // Since the new state may mean that the accessed generation  in get()
167     fn mark_release(&self, gen: Generation<C>) -> Option<bool> {  in mark_release()
181             // Is the slot still at the generation we are trying to remove?  in mark_release()
234     fn release_with<F, M, R>(&self, gen: Generation<C>, offset: usize, free: &F, mutator: M) -> R  in release_with()
254             // If we're going to remove the value, the generation has to match  in release_with()
256             // already stored the new generation.  in release_with()
270                     // the next generation.  in release_with()
278                         // safety: we've modified the generation of this slot and any other thread  in release_with()
279                         // calling this method will exit out at the generation check above in the  in release_with()
349     pub(crate) fn insert(&self, value: &mut Option<T>) -> Option<Generation<C>> {  in insert()
354         let gen = guard.generation();  in insert()
377         gen: Generation<C>,  in try_remove_value()
383             // generation. The bool inside this option indicates whether or not  in try_remove_value()
386             // Otherwise, the generation we tried to remove has already expired,  in try_remove_value()
390                     "-> try_remove_value; nothing exists at generation={:?}",  in try_remove_value()
411         gen: Generation<C>,  in remove_value()
441         gen: Generation<C>,  in try_clear_storage()
447             // generation. The bool inside this option indicates whether or not  in try_clear_storage()
450             // Otherwise, the generation we tried to remove has already expired,  in try_clear_storage()
454                     "-> try_clear_storage; nothing exists at generation={:?}",  in try_clear_storage()
477         gen: Generation<C>,  in clear_storage()
551 // === impl Generation ===
553 impl<C> fmt::Debug for Generation<C> {  implementation
555         f.debug_tuple("Generation").field(&self.value).finish()  in fmt()
559 impl<C: cfg::Config> Generation<C> {  impl
565 impl<C: cfg::Config> PartialEq for Generation<C> {  implementation
571 impl<C: cfg::Config> Eq for Generation<C> {}  implementation
573 impl<C: cfg::Config> PartialOrd for Generation<C> {  implementation
579 impl<C: cfg::Config> Ord for Generation<C> {  implementation
585 impl<C: cfg::Config> Clone for Generation<C> {  implementation
591 impl<C: cfg::Config> Copy for Generation<C> {}  implementation
688     const LEN: usize = cfg::WIDTH - (Lifecycle::<C>::LEN + Generation::<C>::LEN);
760     const LEN: usize = Generation::<C>::LEN;
764         Self(Generation::from_usize(value))  in from_usize()
773     pub(crate) fn generation(&self) -> Generation<C> {  in generation()  method
880             let new_lifecycle = LifecycleGen(self.generation()).pack(State::Removing as usize);  in release2()