Trait wasmtime_environ::__core::prelude::v1::Send 1.0.0[−][src]
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.
Implementations on Foreign Types
impl Send for Big32x40
impl Send for Big8x3
impl Send for Number
impl Send for Decoded
impl Send for FullDecoded
impl Send for Sign
impl<'a> Send for Part<'a>
impl<'a> Send for Formatted<'a>
impl Send for Argument
impl Send for FormatSpec
impl Send for Alignment
impl Send for Count
impl<T> Send for Bucket<T>
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,
Implementors
NonNull
pointers are not Send
because the data they reference may be aliased.