std::marker::Send

Trait std::marker::Send

#[lang = "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 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, 
• impl<T> Send for Arc<T> where
    T: Send + Sync + ?Sized, 
• impl<T> Send for std::sync::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 !Send for Select
• impl<T: Send> Send for Receiver<T>
• impl<T: Send> Send for Sender<T>
• impl<T: Send> Send for SyncSender<T>
• impl<T: ?Sized + Send> Send for Mutex<T>
• impl<'a, T: ?Sized> !Send for MutexGuard<'a, T>
• impl Send for Once
• impl<T: ?Sized + Send + Sync> Send for RwLock<T>
• impl<'a, T: ?Sized> !Send for RwLockReadGuard<'a, T>
• impl<'a, T: ?Sized> !Send for RwLockWriteGuard<'a, T>