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 and the Sync trait for more details.
Implementors§
impl !Send for Args
impl !Send for ArgsOs
impl !Send for Arguments<'_>
impl !Send for LocalWaker
impl Send for core::ffi::c_str::Bytes<'_>
impl Send for Waker
impl Send for wiwi::prelude_std::string::Drain<'_>
impl Send for AbortHandle
impl Send for Bytes
impl Send for BytesMut
impl<'a> Send for IoSlice<'a>
impl<'a> Send for IoSliceMut<'a>
impl<'a> Send for Notified<'a>
impl<'a, R, T> Send for MappedMutexGuard<'a, R, T>
impl<'a, R, T> Send for MappedRwLockReadGuard<'a, R, T>
impl<'a, R, T> Send for MappedRwLockWriteGuard<'a, R, T>
impl<'a, T> Send for Drain<'a, T>where
T: Send + Array,
impl<'a, T> Send for MappedMutexGuard<'a, T>
impl<A> Send for SmallVec<A>where
A: Array,
<A as Array>::Item: Send,
impl<C, V, S> Send for wiwi::rc::Rc<C, V, S>
impl<C, V, S> Send for RcWeak<C, V, S>
impl<Dyn> Send for DynMetadata<Dyn>where
Dyn: ?Sized,
impl<K, V> Send for IterMut<'_, K, V>
impl<K, V, S, A> Send for OccupiedEntry<'_, K, V, S, A>
impl<K, V, S, A> Send for RawOccupiedEntryMut<'_, K, V, S, A>
impl<R, G> Send for RawReentrantMutex<R, G>
impl<R, G, T> Send for ReentrantMutex<R, G, T>
impl<R, T> Send for Mutex<R, T>
impl<R, T> Send for RwLock<R, T>
impl<T> !Send for *const Twhere
T: ?Sized,
impl<T> !Send for *mut Twhere
T: ?Sized,
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 std::sync::rwlock::RwLockReadGuard<'_, T>where
T: ?Sized,
impl<T> !Send for std::sync::rwlock::RwLockWriteGuard<'_, 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 &T
impl<T> Send for Cell<T>
impl<T> Send for RefCell<T>
impl<T> Send for ThinBox<T>
ThinBox<T> is Send if T is Send because the data is owned.