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 Rc
s 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 Args
impl !Send for ArgsOs
impl Send for SharedDeserializeMapError
impl Send for AllocScratchError
impl Send for SharedSerializeMapError
impl Send for wasmer_types::lib::std::sync::Once
impl Send for Waker
impl Send for AllocScratch
impl Send for SharedSerializeMap
impl Send for AlignedVec
impl<'_> Send for wasmer_types::lib::std::string::Drain<'_>
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,
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<'_, T> !Send for 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 &'_ T where
T: Sync + ?Sized,
impl<'_, T> Send for &'_ mut T where
T: Send + ?Sized,
impl<'_, T> Send for wasmer_types::lib::std::slice::Iter<'_, T> where
T: Sync,
impl<'_, T> Send for wasmer_types::lib::std::slice::IterMut<'_, T> where
T: Send,
impl<'_, T> Send for Cursor<'_, T> where
T: Sync,
impl<'_, T> Send for CursorMut<'_, T> where
T: Send,
impl<'_, T> Send for alloc::collections::linked_list::Iter<'_, T> where
T: Sync,
impl<'_, T> Send for alloc::collections::linked_list::IterMut<'_, T> where
T: Send,
impl<'_, T> Send for alloc::collections::vec_deque::iter_mut::IterMut<'_, T> where
T: Send,
impl<'_, T, A> Send for wasmer_types::lib::std::vec::Drain<'_, T, A> where
T: Send,
A: Send + Allocator,
impl<'_, T, A> Send for alloc::collections::vec_deque::drain::Drain<'_, T, A> where
T: Send,
A: Allocator + Send,
impl<'_, T, A> Send for RawDrain<'_, T, A> where
A: Allocator + Copy,
T: Send,
impl<'a> Send for IoSlice<'a>
impl<'a> Send for IoSliceMut<'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<Dyn> Send for wasmer_types::lib::std::ptr::DynMetadata<Dyn> where
Dyn: ?Sized,
impl<Dyn> Send for DynMetadata<Dyn> where
Dyn: ?Sized,
impl<T> !Send for *const T where
T: ?Sized,
impl<T> !Send for *mut 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.