Trait core::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

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

impl<T: Send> Send for LinkedList<T>

impl<T: Sync> Send for Iter<'_, T>

impl<T: Send> Send for IterMut<'_, T>

impl<T: Sync> Send for Cursor<'_, T>

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

impl<T: Send, A: Allocator + Send> Send for Drain<'_, T, A>

impl<T: Send> Send for IterMut<'_, T>

impl<T: ?Sized> !Send for Rc<T>

impl<T: ?Sized> !Send for Weak<T>

impl Send for Drain<'_>

impl<T: ?Sized + Sync + Send> Send for Arc<T>

impl<T: ?Sized + Sync + Send> Send for Weak<T>

impl<T: Send, A: Send + Allocator> Send for Drain<'_, T, A>

impl<T: Send, A: Allocator + Send> Send for IntoIter<T, A>

Auto implementors

impl Send for Global

impl<T: ?Sized, A> Send for Box<T, A> where
    A: Send,
    T: Send, 

impl<'a, B: ?Sized> Send for Cow<'a, B> where
    B: Sync,
    <B as ToOwned>::Owned: Send, 

impl<T> Send for BinaryHeap<T> where
    T: Send, 

impl<'a, T> Send for PeekMut<'a, T> where
    T: Send, 

impl<'a, T> Send for Iter<'a, T> where
    T: Sync, 

impl<T> Send for IntoIter<T> where
    T: Send, 

impl<T> Send for IntoIterSorted<T> where
    T: Send, 

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

impl<'a, T> Send for DrainSorted<'a, T> where
    T: Send, 

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

impl<'a, K, V> Send for VacantEntry<'a, K, V> where
    K: Send,
    V: Send, 

impl<'a, K, V> Send for OccupiedEntry<'a, K, V> where
    K: Send,
    V: Send, 

impl<'a, K, V> Send for OccupiedError<'a, K, V> where
    K: Send,
    V: Send, 

impl<K, V> Send for BTreeMap<K, V> where
    K: Send,
    V: Send, 

impl<'a, K, V> Send for Iter<'a, K, V> where
    K: Sync,
    V: Sync, 

impl<'a, K, V> Send for IterMut<'a, K, V> where
    K: Send,
    V: Send, 

impl<K, V> Send for IntoIter<K, V> where
    K: Send,
    V: Send, 

impl<'a, K, V> Send for Keys<'a, K, V> where
    K: Sync,
    V: Sync, 

impl<'a, K, V> Send for Values<'a, K, V> where
    K: Sync,
    V: Sync, 

impl<'a, K, V> Send for ValuesMut<'a, K, V> where
    K: Send,
    V: Send, 

impl<K, V> Send for IntoKeys<K, V> where
    K: Send,
    V: Send, 

impl<K, V> Send for IntoValues<K, V> where
    K: Send,
    V: Send, 

impl<'a, K, V> Send for Range<'a, K, V> where
    K: Sync,
    V: Sync, 

impl<'a, K, V> Send for RangeMut<'a, K, V> where
    K: Send,
    V: Send, 

impl<'a, K, V, F> Send for DrainFilter<'a, K, V, F> where
    F: Send,
    K: Send,
    V: Send, 

impl<T> Send for BTreeSet<T> where
    T: Send, 

impl<'a, T> Send for Iter<'a, T> where
    T: Sync, 

impl<T> Send for IntoIter<T> where
    T: Send, 

impl<'a, T> Send for Range<'a, T> where
    T: Sync, 

impl<'a, T> Send for Difference<'a, T> where
    T: Sync, 

impl<'a, T> Send for SymmetricDifference<'a, T> where
    T: Sync, 

impl<'a, T> Send for Intersection<'a, T> where
    T: Sync, 

impl<'a, T> Send for Union<'a, T> where
    T: Sync, 

impl<'a, T, F> Send for DrainFilter<'a, T, F> where
    F: Send,
    T: Send, 

impl<T> Send for IntoIter<T> where
    T: Send, 

impl<'a, T, F> !Send for DrainFilter<'a, T, F>

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

impl<'a, T> Send for Iter<'a, T> where
    T: Sync, 

impl<T, A> Send for VecDeque<T, A> where
    A: Send,
    T: Send, 

impl Send for String

impl<'a, T, F, A> Send for DrainFilter<'a, T, F, A> where
    A: Send,
    F: Send,
    T: Send, 

impl<'a, I, A> Send for Splice<'a, I, A> where
    A: Send,
    I: Send,
    <I as Iterator>::Item: Send, 

impl<T, A> Send for Vec<T, A> where
    A: Send,
    T: Send,