Trait std::marker::Send

pub unsafe 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 for more details.

Implementors

• impl<T> Send for Arc<T> where T: Send + Sync + ?Sized
• impl<T> Send for alloc::arc::Weak<T> where T: Send + Sync + ?Sized
• impl<T> !Send for Rc<T> where T: ?Sized
• impl<T> !Send for std::rc::Weak<T> where T: ?Sized
• impl<T> Send for Unique<T> where T: Send + ?Sized
• impl<T> !Send for Shared<T> where T: ?Sized
• impl<T> !Send for *const T where T: ?Sized
• impl<T> !Send for *mut T where T: ?Sized
• impl<'a, T> Send for &'a T where T: Sync + ?Sized
• impl<'a, T> Send for &'a mut T where T: Send + ?Sized
• impl<T> Send for AtomicPtr<T>
• impl<T> Send for Cell<T> where T: Send
• impl<T> Send for RefCell<T> where T: Send + ?Sized
• impl<'a, T> Send for std::slice::Iter<'a, T> where T: Sync
• impl<'a, T> Send for std::slice::IterMut<'a, T> where T: Send
• impl<T> Send for LinkedList<T> where T: Send
• impl<'a, T> Send for std::collections::linked_list::Iter<'a, T> where T: Sync
• impl<'a, T> Send for std::collections::linked_list::IterMut<'a, T> where T: Send
• impl<'a> Send for std::string::Drain<'a>
• impl<T> Send for IntoIter<T> where T: Send
• impl<'a, T> Send for std::vec::Drain<'a, T> where T: Send
• impl<'a, T> Send for std::collections::vec_deque::Drain<'a, T> where T: Send