Trait Send

pub unsafe auto trait Send { }

Types that can be transferred across thread boundaries.

This trait is automatically implemented when the compiler determines it’s appropriate.

An example of a non-Send type is the reference-counting pointer rc::Rc. If two threads attempt to clone Rcs that point to the same reference-counted value, they might try to update the reference count at the same time, which is undefined behavior because Rc doesn’t use atomic operations. Its cousin sync::Arc does use atomic operations (incurring some overhead) and thus is Send.

See the Nomicon and the Sync trait for more details.

Implementors

impl !Send for Arguments<'_>

impl !Send for LocalWaker

impl !Send for Args

impl !Send for ArgsOs

impl Send for DroplessArena

impl Send for OwnedSlice

impl Send for alloc::string::Drain<'_>

impl Send for Bytes<'_>

impl Send for Waker

impl Send for Select<'_>

impl Send for Collector

impl Send for Parker

impl Send for Unparker

impl<'a> Send for IoSlice<'a>

impl<'a> Send for IoSliceMut<'a>

impl<'a, R, T> Send for lock_api::mutex::MappedMutexGuard<'a, R, T>

where R: RawMutex + 'a, T: Send + 'a + ?Sized, <R as RawMutex>::GuardMarker: Send,

impl<'a, R, T> Send for lock_api::rwlock::MappedRwLockReadGuard<'a, R, T>

where R: RawRwLock + 'a, T: Sync + 'a + ?Sized, <R as RawRwLock>::GuardMarker: Send,

impl<'a, R, T> Send for lock_api::rwlock::MappedRwLockWriteGuard<'a, R, T>

where R: RawRwLock + 'a, T: Send + 'a + ?Sized, <R as RawRwLock>::GuardMarker: Send,

impl<'a, T> Send for smallvec::Drain<'a, T>

where T: Send + Array,

impl<'a, T, const CAP: usize> Send for arrayvec::arrayvec::Drain<'a, T, CAP>

where T: Send,

impl<A> Send for SmallVec<A>

where A: Array, <A as Array>::Item: Send,

impl<Dyn> Send for DynMetadata<Dyn>

where Dyn: ?Sized,

impl<I, T> Send for IndexSlice<I, T>

where I: Idx, T: Send,

impl<I, T> Send for IndexVec<I, T>

where I: Idx, T: Send,

impl<K, V> Send for hashbrown::map::IterMut<'_, K, V>

where K: Send, V: Send,

impl<K, V> Send for hashbrown::map::IterMut<'_, K, V>

where K: Send, V: Send,

impl<K, V, A> Send for RustcOccupiedEntry<'_, K, V, A>

where K: Send, V: Send, A: Allocator + Send,

impl<K, V, S, A> Send for hashbrown::map::OccupiedEntry<'_, K, V, S, A>

where K: Send, V: Send, S: Send, A: Send + Allocator,

impl<K, V, S, A> Send for RawOccupiedEntryMut<'_, K, V, S, A>

where K: Send, V: Send, S: Send, A: Send + Allocator,

impl<K, V, S, A> Send for hashbrown::map::OccupiedEntry<'_, K, V, S, A>

where K: Send, V: Send, S: Send, A: Send + Allocator,

impl<P, T, const CP: bool> Send for CopyTaggedPtr<P, T, CP>

where P: Send + Pointer, T: Send + Tag,

impl<R, G> Send for RawReentrantMutex<R, G>

where R: RawMutex + Send, G: GetThreadId + Send,

impl<R, G, T> Send for ReentrantMutex<R, G, T>

where R: RawMutex + Send, G: GetThreadId + Send, T: Send + ?Sized,

impl<R, T> Send for lock_api::mutex::Mutex<R, T>

where R: RawMutex + Send, T: Send + ?Sized,

impl<R, T> Send for lock_api::rwlock::RwLock<R, T>

where R: RawRwLock + Send, T: Send + ?Sized,

impl<T> !Send for *const T

where T: ?Sized,

impl<T> !Send for *mut T

where T: ?Sized,

impl<T> !Send for NonNull<T>

where T: ?Sized,

NonNull pointers are not Send because the data they reference may be aliased.

impl<T> !Send for std::sync::mutex::MappedMutexGuard<'_, T>

where T: ?Sized,

impl<T> !Send for MutexGuard<'_, T>

where T: ?Sized,

impl<T> !Send for ReentrantLockGuard<'_, T>

where T: ?Sized,

impl<T> !Send for std::sync::rwlock::MappedRwLockReadGuard<'_, T>

where T: ?Sized,

impl<T> !Send for std::sync::rwlock::MappedRwLockWriteGuard<'_, T>

where T: ?Sized,

impl<T> !Send for RwLockReadGuard<'_, T>

where T: ?Sized,

impl<T> !Send for RwLockWriteGuard<'_, T>

where T: ?Sized,

impl<T> Send for &T

where T: Sync + ?Sized,

impl<T> Send for TypedArena<T>

where T: Send,

impl<T> Send for ThinBox<T>

where T: Send + ?Sized,

ThinBox<T> is Send if T is Send because the data is owned.

impl<T> Send for alloc::collections::linked_list::Iter<'_, T>

where T: Sync,

impl<T> Send for alloc::collections::linked_list::IterMut<'_, T>

where T: Send,

impl<T> Send for Cell<T>

where T: Send + ?Sized,

impl<T> Send for RefCell<T>

where T: Send + ?Sized,

impl<T> Send for NonZero<T>

where T: ZeroablePrimitive + Send,

impl<T> Send for ChunksExactMut<'_, T>

where T: Send,

impl<T> Send for ChunksMut<'_, T>

where T: Send,

impl<T> Send for core::slice::iter::Iter<'_, T>

where T: Sync,

impl<T> Send for core::slice::iter::IterMut<'_, T>

where T: Send,

impl<T> Send for RChunksExactMut<'_, T>

where T: Send,

impl<T> Send for RChunksMut<'_, T>

where T: Send,

impl<T> Send for AtomicPtr<T>

impl<T> Send for std::sync::mpmc::Receiver<T>

where T: Send,

impl<T> Send for std::sync::mpmc::Sender<T>

where T: Send,

impl<T> Send for std::sync::mpsc::Receiver<T>

where T: Send,

impl<T> Send for std::sync::mpsc::Sender<T>

where T: Send,

impl<T> Send for SyncSender<T>

where T: Send,

impl<T> Send for std::sync::mutex::Mutex<T>

where T: Send + ?Sized,

impl<T> Send for ReentrantLock<T>

where T: Send + ?Sized,

impl<T> Send for std::sync::rwlock::RwLock<T>

where T: Send + ?Sized,

impl<T> Send for JoinHandle<T>

impl<T> Send for crossbeam_channel::channel::Receiver<T>

where T: Send,

impl<T> Send for crossbeam_channel::channel::Sender<T>

where T: Send,

impl<T> Send for Injector<T>

where T: Send,

impl<T> Send for Stealer<T>

where T: Send,

impl<T> Send for Worker<T>

where T: Send,

impl<T> Send for Atomic<T>

where T: Pointable + Send + Sync + ?Sized,

impl<T> Send for AtomicCell<T>

where T: Send,

impl<T> Send for CachePadded<T>

where T: Send,

impl<T> Send for ShardedLock<T>

where T: Send + ?Sized,

impl<T> Send for ScopedJoinHandle<'_, T>

impl<T> Send for ThinVec<T>

where T: Send,

impl<T> Send for OnceLock<T>

where T: Send,

impl<T, A> !Send for Rc<T, A>

where A: Allocator, T: ?Sized,

impl<T, A> !Send for alloc::rc::Weak<T, A>

where A: Allocator, T: ?Sized,

impl<T, A> Send for Cursor<'_, T, A>

where T: Sync, A: Allocator + Sync,

impl<T, A> Send for CursorMut<'_, T, A>

where T: Send, A: Allocator + Send,

impl<T, A> Send for LinkedList<T, A>

where T: Send, A: Allocator + Send,

impl<T, A> Send for alloc::collections::vec_deque::drain::Drain<'_, T, A>

where T: Send, A: Allocator + Send,

impl<T, A> Send for alloc::vec::drain::Drain<'_, T, A>

where T: Send, A: Send + Allocator,

impl<T, A> Send for IntoIter<T, A>

where T: Send, A: Allocator + Send,

impl<T, A> Send for hashbrown::table::OccupiedEntry<'_, T, A>

where T: Send, A: Send + Allocator,

impl<T, A> Send for hashbrown::table::OccupiedEntry<'_, T, A>

where T: Send, A: Send + Allocator,

impl<T, A> Send for Arc<T, A>

where T: Sync + Send + ?Sized, A: Allocator + Send,

impl<T, A> Send for rustc_data_structures::sync::Weak<T, A>

where T: Sync + Send + ?Sized, A: Allocator + Send,

impl<T: DynSend> Send for FromDyn<T>

Auto implementors

impl !Send for RegistryId

impl !Send for ThreadData

impl Send for NodeStatus

impl Send for rustc_data_structures::obligation_forest::NodeState

impl Send for TimePassesFormat

impl Send for Mode

impl Send for BaseNString

impl Send for Fingerprint

impl Send for PackedFingerprint

impl Send for rustc_data_structures::flock::linux::Lock

impl Send for FxHasher

impl Send for PreorderIndex

impl Send for Time

impl Send for Direction

impl Send for EdgeIndex

impl Send for NodeIndex

impl Send for CycleDetector

impl Send for PrivateZst

impl Send for Client

impl Send for Mmap

impl Send for MmapMut

impl Send for ObligationTreeId

impl Send for Pu128

impl Send for EventFilter

impl Send for EventId

impl Send for QueryInvocationId

impl Send for SelfProfiler

impl Send for SelfProfilerRef

impl Send for VerboseInfo

impl Send for SmallCStr

impl Send for Hash64

impl Send for Hash128

impl Send for HashingControls

impl Send for SipHasher128Hash

impl Send for FatalErrorMarker

impl Send for Svh

impl Send for MaybeTempDir

impl Send for rustc_data_structures::transitive_relation::Edge

impl Send for Index

impl Send for NoUndo

impl Send for rustc_data_structures::undo_log::Snapshot

impl Send for Unhasher

impl Send for NoError

impl Send for SlotIndex

impl Send for ParallelGuard

impl Send for AtomicBool

impl Send for AtomicU32

impl Send for AtomicU64

impl Send for AtomicUsize

impl Send for Registry

impl Send for RegistryData

impl Send for ModeUnion

impl<'a> Send for JsonTimePassesEntry<'a>

impl<'a> Send for TimingGuard<'a>

impl<'a> Send for VerboseTimingGuard<'a>

impl<'a, K, V> Send for Entry<'a, K, V>

where K: Send, V: Send,

impl<'a, T> !Send for FreezeReadGuard<'a, T>

impl<'a, T> !Send for FreezeWriteGuard<'a, T>

impl<'a, T> !Send for LockGuard<'a, T>

impl<'a, T> Send for Interned<'a, T>

where T: Sync,

impl<'a, T, F> Send for ExtractIf<'a, T, F>

where F: Send, T: Send,

impl<'c, G, S, A, F> Send for SccsConstruction<'c, G, S, A, F>

where F: Send, G: Sync, A: Send, S: Send, <G as DirectedGraph>::Node: Send,

impl<'g, N, E> Send for AdjacentEdges<'g, N, E>

where N: Sync, E: Sync,

impl<'g, N, E> Send for DepthFirstTraversal<'g, N, E>

where N: Sync, E: Sync,

impl<'graph, G> Send for TriColorDepthFirstSearch<'graph, G>

where G: Sync + ?Sized, <G as DirectedGraph>::Node: Send,

impl<'p> Send for EventArgRecorder<'p>

impl<A> Send for SccDetails<A>

where A: Send,

impl<D> Send for rustc_data_structures::snapshot_vec::UndoLog<D>

where <D as SnapshotVecDelegate>::Value: Send, <D as SnapshotVecDelegate>::Undo: Send,

impl<D, V, L> Send for SnapshotVec<D, V, L>

where V: Send, L: Send, D: Send,

impl<E> Send for rustc_data_structures::graph::implementation::Edge<E>

where E: Send,

impl<F> Send for OnDrop<F>

where F: Send,

impl<G> Send for DepthFirstSearch<G>

where G: Send, <G as DirectedGraph>::Node: Send,

impl<I, K, V> Send for SortedIndexMultiMap<I, K, V>

where K: Send, V: Send, I: Send,

impl<I, T> Send for AppendOnlyIndexVec<I, T>

impl<Iter> Send for PreOrderFrame<Iter>

where Iter: Send,

impl<K> Send for VarValue<K>

where K: Send, <K as UnifyKey>::Value: Send,

impl<K, V> Send for rustc_data_structures::snapshot_map::UndoLog<K, V>

where K: Send, V: Send,

impl<K, V> Send for SsoHashMap<K, V>

where K: Send, V: Send,

impl<K, V> Send for SortedMap<K, V>

where K: Send, V: Send,

impl<K, V> Send for UnordMap<K, V>

where K: Send, V: Send,

impl<K, V, I> Send for VecCache<K, V, I>

where K: Send, I: Send,

impl<K, V, L> Send for InPlace<K, V, L>

where V: Send, L: Send, K: Send,

impl<K, V, M, L> Send for SnapshotMap<K, V, M, L>

where M: Send, L: Send, K: Send, V: Send,

impl<N> Send for Inner<N>

where N: Send,

impl<N> Send for rustc_data_structures::graph::implementation::Node<N>

where N: Send,

impl<N> Send for Event<N>

where N: Send,

impl<N, E> Send for Graph<N, E>

where N: Send, E: Send,

impl<N, S, A> Send for rustc_data_structures::graph::scc::NodeState<N, S, A>

where A: Send, S: Send, N: Send,

impl<N, S, A> Send for Sccs<N, S, A>

where S: Send, A: Send,

impl<N, const BR: bool> Send for VecGraph<N, BR>

where N: Send,

impl<Node> Send for Kind<Node>

where Node: Send,

impl<Node> Send for Dominators<Node>

where Node: Send,

impl<O> Send for rustc_data_structures::obligation_forest::Node<O>

where O: Send,

impl<O> Send for ObligationForest<O>

where O: Send, <O as ForestObligation>::CacheKey: Send,

impl<O, E> Send for ProcessResult<O, E>

where E: Send, O: Send,

impl<O, E> Send for Error<O, E>

where E: Send, O: Send,

impl<O, E> Send for Outcome<O, E>

where E: Send, O: Send,

impl<P, T, const COMPARE_PACKED: bool> Send for TaggedPtr<P, T, COMPARE_PACKED>

where P: Send, T: Send,

impl<S> Send for rustc_data_structures::snapshot_vec::Snapshot<S>

where S: Send,

impl<S> Send for rustc_data_structures::unify::Snapshot<S>

where <S as UnificationStore>::Snapshot: Send, S: Send,

impl<S> Send for UnificationTable<S>

where S: Send,

impl<S, A> Send for WalkReturn<S, A>

where A: Send, S: Send,

impl<S, A> Send for SccData<S, A>

where A: Send, S: Send,

impl<T> Send for Sharded<T>

where T: Send,

impl<T> Send for AtomicRef<T>

where T: Sync,

impl<T> Send for Frozen<T>

where T: Send,

impl<T> Send for IntoDynSyncSend<T>

where T: Send + ?Sized,

impl<T> Send for SsoHashSet<T>

where T: Send,

impl<T> Send for Steal<T>

where T: Send,

impl<T> Send for TransitiveRelation<T>

where T: Send,

impl<T> Send for TransitiveRelationBuilder<T>

where T: Send,

impl<T> Send for VecLog<T>

where T: Send,

impl<T> Send for WorkQueue<T>

where T: Send,

impl<T> Send for FreezeLock<T>

where T: Send,

impl<T> Send for rustc_data_structures::sync::lock::Lock<T>

where T: Send,

impl<T> Send for CacheAligned<T>

where T: Send,

impl<T> Send for MTLock<T>

where T: Send,

impl<T> Send for rustc_data_structures::sync::RwLock<T>

where T: Send,

impl<T> Send for AppendOnlyVec<T>

where T: Send,

impl<T> Send for WorkerLocal<T>

where T: Send,

impl<T, I> Send for UnordItems<T, I>

where I: Send,

impl<V> Send for UnordBag<V>

where V: Send,

impl<V> Send for UnordSet<V>

where V: Send,

impl<V> Send for Slot<V>

where V: Send,