Trait frame_support::dispatch::marker::Send
1.0.0 · source · pub unsafe auto trait Send { }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 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 for more details.
Implementors§
impl !Send for TokenTree
impl !Send for ExpandError
impl !Send for Group
impl !Send for LexError
impl !Send for LineColumn
impl !Send for Punct
impl !Send for Span
impl !Send for TokenStream
impl !Send for Args
impl !Send for ArgsOs
impl Send for alloc::string::Drain<'_>
impl Send for Waker
impl Send for AtomicWaker
impl Send for Bump
impl Send for Bytes
impl Send for BytesMut
impl Send for Collector
impl Send for DCtx<'_>
impl Send for Dir
Dir implements Send but not Sync, because we use readdir which is
not guaranteed to be thread-safe. Users can wrap this in a Mutex if they
need Sync, which is effectively what’d need to do to implement Sync
ourselves.
impl Send for Dir
Dir implements Send but not Sync, because we use readdir which is
not guaranteed to be thread-safe. Users can wrap this in a Mutex if they
need Sync, which is effectively what’d need to do to implement Sync
ourselves.
impl Send for ExportFunction
impl Send for ExportGlobal
impl Send for ExportMemory
impl Send for ExportTable
impl Send for GdbJitImageRegistration
impl Send for InstanceHandle
impl Send for Parker
impl Send for Select<'_>
impl Send for TableElementwhere VMExternRef: Send,
impl Send for Unparker
impl Send for VMCallerCheckedFuncRef
impl Send for VMExternRef
impl Send for VMFunctionImport
impl Send for VMGlobalImport
impl Send for VMHostFuncContext
impl Send for VMMemoryImport
impl Send for VMRuntimeLimits
impl Send for VMTableImport
impl<'a> Send for IoSlice<'a>
impl<'a> Send for IoSliceMut<'a>
impl<'a> Send for CCtx<'a>
impl<'a> Send for CDict<'a>
impl<'a> Send for DDict<'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, '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, A> Send for arrayvec::Drain<'a, A>where A: Array + Send,
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 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<C> Send for Secp256k1<C>where C: Context,
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<K, V> Send for IterMut<'_, K, V>where K: Send, V: Send,
impl<K, V> Send for IterMut<'_, K, V>where K: Send, V: 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 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<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<T> !Send for *const Twhere T: ?Sized,
impl<T> !Send for *mut Twhere T: ?Sized,
impl<T> !Send for Rc<T>where T: ?Sized,
impl<T> !Send for alloc::rc::Weak<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::MutexGuard<'_, 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 &Twhere T: Sync + ?Sized,
impl<T> Send for ThinBox<T>where T: Send + ?Sized,
ThinBox<T> is Send if T is Send because the data is owned.