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 and the Sync
trait for more details.
Implementors§
impl !Send for Args
impl !Send for ArgsOs
impl Send for AllocScratchError
impl Send for ArchiveError
impl Send for wasmer_types::lib::std::string::Drain<'_>
impl Send for Waker
impl Send for BorrowedHandle<'_>
impl Send for HandleOrInvalid
impl Send for HandleOrNull
impl Send for OwnedHandle
impl Send for AllocScratch
impl Send for AlignedVec
impl Send for PrefixRange
impl Send for SuffixRange
impl<'a> Send for IoSlice<'a>
impl<'a> Send for IoSliceMut<'a>
impl<'a> Send for ArchiveValidator<'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<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 RawOccupiedEntryMut<'_, K, V, S, A>where K: Send, V: Send, S: Send, A: Send + Allocator + Clone,
impl<T> !Send for *const Twhere T: ?Sized,
impl<T> !Send for *mut Twhere 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 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 &Twhere T: Sync + ?Sized,
impl<T> Send for ThinBox<T>where T: Send + ?Sized,
ThinBox<T>
is Send
if T
is Send
because the data is owned.