pub unsafe auto trait Send { }
Available on non-crate feature
miri-test-libstd
only.Expand description
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 Rc
s 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 for more details.
Implementors§
impl !Send for Args
impl !Send for ArgsOs
impl Send for LazyRequestBody
impl Send for Collection
impl Send for AcceptManager
impl Send for kvarn::prelude::bytes::Bytes
impl Send for BytesMut
impl Send for kvarn::prelude::compact_str::Drain<'_>
impl Send for Waker
impl Send for alloc::string::Drain<'_>
impl Send for AbortHandle
impl Send for AtomicWaker
impl Send for BrotliSubclassableAllocator
Available on non-crate feature
safe
only.impl Send for CAllocator
impl Send for Collector
impl Send for Parker
impl Send for Select<'_>
impl Send for Unparker
impl<'a> Send for IoSlice<'a>
impl<'a> Send for IoSliceMut<'a>
impl<'a> Send for Notified<'a>
impl<'a, 'b, K, Q, V, S, A> Send for OccupiedEntryRef<'a, 'b, K, Q, V, S, A>where K: Send, Q: Sync + ?Sized, V: Send, S: Send, A: Send + Allocator + Clone,
impl<'a, 'i, K, S, M> Send for Iter<'i, K, S, M>where K: 'a + Eq + Hash + Send, S: 'a + BuildHasher + Clone, M: Map<'a, K, (), S>,
impl<'a, 'i, K, V> Send for Iter<'i, K, V>where K: 'a + Eq + Hash + Send, V: 'a + Send,
impl<'a, 'i, K, V, S, M> Send for Iter<'i, K, V, S, M>where K: 'a + Eq + Hash + Send, V: 'a + Send, S: 'a + BuildHasher + Clone, M: Map<'a, K, V, S>,
impl<'a, 'i, K, V, S, M> Send for IterMut<'i, K, V, S, M>where K: 'a + Eq + Hash + Send, V: 'a + Send, S: 'a + BuildHasher + Clone, M: Map<'a, K, V, S>,
impl<'a, K, V, S> Send for OccupiedEntry<'a, K, V, S>where K: Eq + Hash + Sync, V: Sync, S: BuildHasher,
impl<'a, K, V, S> Send for Ref<'a, K, V, S>where K: Eq + Hash + Sync, V: Sync, S: BuildHasher,
impl<'a, K, V, S> Send for RefMulti<'a, K, V, S>where K: Eq + Hash + Sync, V: Sync, S: BuildHasher,
impl<'a, K, V, S> Send for RefMut<'a, K, V, S>where K: Eq + Hash + Sync, V: Sync, S: BuildHasher,
impl<'a, K, V, S> Send for RefMutMulti<'a, K, V, S>where K: Eq + Hash + Sync, V: Sync, S: BuildHasher,
impl<'a, K, V, S> Send for VacantEntry<'a, K, V, S>where K: Eq + Hash + Sync, V: Sync, S: BuildHasher,
impl<'a, R, T> Send for MappedMutexGuard<'a, R, T>where R: RawMutex + 'a, T: Send + 'a + ?Sized, <R as RawMutex>::GuardMarker: Send,
impl<'a, R, T> Send for MappedRwLockReadGuard<'a, R, T>where R: RawRwLock + 'a, T: Sync + 'a + ?Sized, <R as RawRwLock>::GuardMarker: Send,
impl<'a, R, T> Send for MappedRwLockWriteGuard<'a, R, T>where R: RawRwLock + 'a, T: Send + 'a + ?Sized, <R as RawRwLock>::GuardMarker: Send,
impl<'a, T> Send for kvarn::prelude::header::Drain<'a, T>where T: Send,
impl<'a, T> Send for kvarn::prelude::header::Iter<'a, T>where T: Sync,
impl<'a, T> Send for kvarn::prelude::header::IterMut<'a, T>where T: Send,
impl<'a, T> Send for ValueDrain<'a, T>where T: Send,
impl<'a, T> Send for ValueIterMut<'a, T>where T: Send,
impl<'a, T> Send for Drain<'a, T>where T: Send + Array,
impl<'a, T> Send for MappedMutexGuard<'a, T>where T: Send + 'a + ?Sized,
impl<A> Send for SmallVec<A>where A: Array, <A as Array>::Item: Send,
impl<A, B> Send for ArcUnion<A, B>where A: Sync + Send, B: Send + Sync,
impl<Dyn> Send for DynMetadata<Dyn>where Dyn: ?Sized,
impl<Fut> Send for FuturesUnordered<Fut>where Fut: Send,
impl<Fut> Send for IntoIter<Fut>where Fut: Send + Unpin,
impl<Fut> Send for IterPinMut<'_, Fut>where Fut: Send,
impl<Fut> Send for IterPinRef<'_, Fut>where Fut: Send,
impl<H, T> Send for ThinArc<H, T>where H: Sync + Send, T: Sync + Send,
impl<K, S> Send for OwningIter<K, S>where K: Eq + Hash + Send, S: BuildHasher + Clone + Send,
impl<K, V> Send for IterMut<'_, K, V>where K: Send, V: Send,
impl<K, V, S> Send for Cache<K, V, S>where K: Send + Sync, V: Send + Sync, S: Send,
impl<K, V, S> Send for OwningIter<K, V, S>where K: Eq + Hash + Send, V: Send, S: BuildHasher + Clone + Send,
impl<K, V, S> Send for SegmentedCache<K, V, S>where K: Send + Sync, V: Send + Sync, S: Send,
impl<K, V, S, A> Send for OccupiedEntry<'_, K, V, S, A>where K: Send, V: Send, S: Send, A: Send + Allocator + Clone,
impl<K, V, S, A> Send for RawOccupiedEntryMut<'_, K, V, S, A>where K: Send, V: Send, S: Send, A: Send + Allocator + Clone,
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 Mutex<R, T>where R: RawMutex + Send, T: Send + ?Sized,
impl<R, T> Send for RwLock<R, T>where R: RawRwLock + Send, T: Send + ?Sized,
impl<S, C> Send for IoUring<S, C>where S: EntryMarker, C: EntryMarker,
impl<T> !Send for *const Twhere T: ?Sized,
impl<T> !Send for *mut Twhere 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 Rc<T>where T: ?Sized,
impl<T> !Send for alloc::rc::Weak<T>where T: ?Sized,
impl<T> !Send for std::sync::mutex::MutexGuard<'_, T>where T: ?Sized,
impl<T> !Send for std::sync::rwlock::RwLockReadGuard<'_, T>where T: ?Sized,
impl<T> !Send for std::sync::rwlock::RwLockWriteGuard<'_, T>where T: ?Sized,
impl<T> Send for &Twhere T: Sync + ?Sized,
impl<T> Send for kvarn::prelude::Arc<T>where T: Sync + Send + ?Sized,
impl<T> Send for kvarn::prelude::Mutex<T>where T: Send + ?Sized,
impl<T> Send for kvarn::prelude::RwLock<T>where T: Send + ?Sized,
impl<T> Send for SuperUnsafePointer<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 ChunksExactMut<'_, T>where T: Send,
impl<T> Send for ChunksMut<'_, T>where T: Send,
impl<T> Send for kvarn::prelude::compact_str::core::slice::Iter<'_, T>where T: Sync,
impl<T> Send for kvarn::prelude::compact_str::core::slice::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>
Available on
target_has_atomic_load_store="ptr"
only.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::Cursor<'_, T>where T: Sync,
impl<T> Send for CursorMut<'_, T>where T: Send,
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 LinkedList<T>where T: Send,
impl<T> Send for alloc::sync::Weak<T>where T: Sync + Send + ?Sized,
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 OnceLock<T>where T: Send,
impl<T> Send for std::sync::rwlock::RwLock<T>where T: Send + ?Sized,
impl<T> Send for std::thread::JoinHandle<T>
impl<T> Send for Arc<T>where T: Sync + Send + ?Sized,
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 Bucket<T>
impl<T> Send for CachePadded<T>where T: Send,
impl<T> Send for FutureObj<'_, T>
impl<T> Send for JoinHandle<T>where T: Send,
impl<T> Send for Mutex<T>where T: Send + ?Sized,
impl<T> Send for Mutex<T>where T: Send + ?Sized,
impl<T> Send for MutexGuard<'_, T>where T: Send + ?Sized,
impl<T> Send for MutexLockFuture<'_, T>where T: Send + ?Sized,
impl<T> Send for OffsetArc<T>where T: Sync + Send,
impl<T> Send for Once<T>where T: Send,
impl<T> Send for OnceCell<T>where T: Send,
impl<T> Send for OwnedMutexGuard<T>where T: Send + ?Sized,
impl<T> Send for OwnedMutexLockFuture<T>where T: Send + ?Sized,
impl<T> Send for OwnedRwLockWriteGuard<T>where T: Send + Sync + ?Sized,
impl<T> Send for ReadHalf<T>where T: Send,
impl<T> Send for Receiver<T>where T: Send,
impl<T> Send for Receiver<T>where T: Send,
impl<T> Send for RwLock<T>where T: Send + ?Sized,
impl<T> Send for RwLockMappedWriteGuard<'_, T>where T: Send + Sync + ?Sized,
impl<T> Send for RwLockReadGuard<'_, T>where T: Sync + ?Sized,
impl<T> Send for RwLockWriteGuard<'_, T>where T: Send + Sync + ?Sized,
impl<T> Send for ScopedJoinHandle<'_, T>
impl<T> Send for SendableMemoryBlock<T>where T: Clone + Default,
Available on non-crate feature
safe
only.