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 AllocScratchError
impl Send for ArchiveError
impl Send for wasmer_types::lib::std::string::Drain<'_>
impl Send for Waker
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 Rc<T>where T: ?Sized,
impl<T> !Send for wasmer_types::lib::std::rc::Weak<T>where T: ?Sized,
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.