core::marker::Send - Rust
Description: API documentation for the Rust `Send` trait in crate `core`.
Keywords: rust, rustlang, rust-lang, Send

# 1.0.0[−][src]Trait core::marker::Send

    pub unsafe auto 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 `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 Waker`[src]

### `impl<'_, T: Send + ?Sized> Send for &'_ mut T`[src]

### `impl<'_, T: Send> Send for core::slice::IterMut<'_, T>`[src]

### `impl<'_, T: Sync + ?Sized> Send for &'_ T`[src]

### `impl<'_, T: Sync> Send for core::slice::Iter<'_, T>`[src]

### `impl<T> Send for Empty<T>`[src]

### `impl<T> Send for AtomicPtr<T>`[src]

### `impl<T: ?Sized> !Send for *const T`[src]

### `impl<T: ?Sized> !Send for *mut T`[src]

### `impl<T: ?Sized> !Send for NonNull<T>`[src]

`NonNull` pointers are not `Send` because the data they reference may be aliased.

### `impl<T: ?Sized> Send for Cell<T> where
T: Send,` [src]

### `impl<T: ?Sized> Send for RefCell<T> where
T: Send,` [src]

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## Auto implementors

### `impl !Send for MemoryBlock`

### `impl !Send for TraitObject`

### `impl !Send for RawWaker`

### `impl Send for AllocInit`

### `impl Send for ReallocPlacement`

### `impl Send for core::cmp::Ordering`

### `impl Send for Infallible`

### `impl Send for c_void`

### `impl Send for Alignment`

### `impl Send for FpCategory`

### `impl Send for IntErrorKind`

### `impl Send for SearchStep`

### `impl Send for core::sync::atomic::Ordering`

### `impl Send for AllocErr`

### `impl Send for Layout`

### `impl Send for LayoutErr`

### `impl Send for TypeId`

### `impl Send for float64x1_t`

### `impl Send for float64x2_t`

### `impl Send for int8x16x2_t`

### `impl Send for int8x16x3_t`

### `impl Send for int8x16x4_t`

### `impl Send for poly128_t`

### `impl Send for poly64_t`

### `impl Send for poly64x1_t`

### `impl Send for poly64x2_t`

### `impl Send for poly8x16x2_t`

### `impl Send for poly8x16x3_t`

### `impl Send for poly8x16x4_t`

### `impl Send for uint8x16x2_t`

### `impl Send for uint8x16x3_t`

### `impl Send for uint8x16x4_t`

### `impl Send for APSR`

### `impl Send for SY`

### `impl Send for float32x2_t`

### `impl Send for float32x4_t`

### `impl Send for int16x4_t`

### `impl Send for int16x8_t`

### `impl Send for int32x2_t`

### `impl Send for int32x4_t`

### `impl Send for int64x1_t`

### `impl Send for int64x2_t`

### `impl Send for int8x16_t`

### `impl Send for int8x8_t`

### `impl Send for int8x8x2_t`

### `impl Send for int8x8x3_t`

### `impl Send for int8x8x4_t`

### `impl Send for poly16x4_t`

### `impl Send for poly16x8_t`

### `impl Send for poly8x16_t`

### `impl Send for poly8x8_t`

### `impl Send for poly8x8x2_t`

### `impl Send for poly8x8x3_t`

### `impl Send for poly8x8x4_t`

### `impl Send for uint16x4_t`

### `impl Send for uint16x8_t`

### `impl Send for uint32x2_t`

### `impl Send for uint32x4_t`

### `impl Send for uint64x1_t`

### `impl Send for uint64x2_t`

### `impl Send for uint8x16_t`

### `impl Send for uint8x8_t`

### `impl Send for uint8x8x2_t`

### `impl Send for uint8x8x3_t`

### `impl Send for uint8x8x4_t`

### `impl Send for vector_bool_long`

### `impl Send for vector_double`

### `impl Send for vector_signed_long`

### `impl Send for vector_unsigned_long`

### `impl Send for v128`

### `impl Send for CpuidResult`

### `impl Send for __m128`

### `impl Send for __m128d`

### `impl Send for __m128i`

### `impl Send for __m256`

### `impl Send for __m256d`

### `impl Send for __m256i`

### `impl Send for __m512`

### `impl Send for __m512d`

### `impl Send for __m512i`

### `impl Send for __m64`

### `impl Send for TryFromSliceError`

### `impl Send for core::ascii::EscapeDefault`

### `impl Send for BorrowError`

### `impl Send for BorrowMutError`

### `impl Send for CharTryFromError`

### `impl Send for DecodeUtf16Error`

### `impl Send for core::char::EscapeDebug`

### `impl Send for core::char::EscapeDefault`

### `impl Send for core::char::EscapeUnicode`

### `impl Send for ParseCharError`

### `impl Send for ToLowercase`

### `impl Send for ToUppercase`

### `impl Send for Error`

### `impl Send for SipHasher`

### `impl Send for PhantomPinned`

### `impl Send for NonZeroI128`

### `impl Send for NonZeroI16`

### `impl Send for NonZeroI32`

### `impl Send for NonZeroI64`

### `impl Send for NonZeroI8`

### `impl Send for NonZeroIsize`

### `impl Send for NonZeroU128`

### `impl Send for NonZeroU16`

### `impl Send for NonZeroU32`

### `impl Send for NonZeroU64`

### `impl Send for NonZeroU8`

### `impl Send for NonZeroUsize`

### `impl Send for ParseFloatError`

### `impl Send for ParseIntError`

### `impl Send for TryFromIntError`

### `impl Send for RangeFull`

### `impl Send for NoneError`

### `impl Send for Utf8Lossy`

### `impl Send for ParseBoolError`

### `impl Send for Utf8Error`

### `impl Send for AtomicBool`

### `impl Send for AtomicI16`

### `impl Send for AtomicI32`

### `impl Send for AtomicI64`

### `impl Send for AtomicI8`

### `impl Send for AtomicIsize`

### `impl Send for AtomicU16`

### `impl Send for AtomicU32`

### `impl Send for AtomicU64`

### `impl Send for AtomicU8`

### `impl Send for AtomicUsize`

### `impl Send for RawWakerVTable`

### `impl Send for Duration`

### `impl<'a> !Send for Arguments<'a>`

### `impl<'a> !Send for Formatter<'a>`

### `impl<'a> !Send for PanicInfo<'a>`

### `impl<'a> Send for Location<'a>`

### `impl<'a> Send for Utf8LossyChunk<'a>`

### `impl<'a> Send for Utf8LossyChunksIter<'a>`

### `impl<'a> Send for CharSearcher<'a>`

### `impl<'a> Send for Bytes<'a>`

### `impl<'a> Send for CharIndices<'a>`

### `impl<'a> Send for Chars<'a>`

### `impl<'a> Send for EncodeUtf16<'a>`

### `impl<'a> Send for core::str::EscapeDebug<'a>`

### `impl<'a> Send for core::str::EscapeDefault<'a>`

### `impl<'a> Send for core::str::EscapeUnicode<'a>`

### `impl<'a> Send for Lines<'a>`

### `impl<'a> Send for LinesAny<'a>`

### `impl<'a> Send for SplitAsciiWhitespace<'a>`

### `impl<'a> Send for SplitWhitespace<'a>`

### `impl<'a> Send for Context<'a>`

### `impl<'a, 'b> !Send for DebugList<'a, 'b>`

### `impl<'a, 'b> !Send for DebugMap<'a, 'b>`

### `impl<'a, 'b> !Send for DebugSet<'a, 'b>`

### `impl<'a, 'b> !Send for DebugStruct<'a, 'b>`

### `impl<'a, 'b> !Send for DebugTuple<'a, 'b>`

### `impl<'a, 'b> Send for CharSliceSearcher<'a, 'b>`

### `impl<'a, 'b> Send for StrSearcher<'a, 'b>`

### `impl<'a, 'f> !Send for VaList<'a, 'f>`

### `impl<'a, A> Send for core::option::Iter<'a, A> where
A: Sync,`

### `impl<'a, A> Send for core::option::IterMut<'a, A> where
A: Send,`

### `impl<'a, F> Send for CharPredicateSearcher<'a, F> where
F: MultiCharEq + Send,`

### `impl<'a, P> Send for MatchIndices<'a, P> where
<P as Pattern<'a>>::Searcher: Send,`

### `impl<'a, P> Send for Matches<'a, P> where
<P as Pattern<'a>>::Searcher: Send,`

### `impl<'a, P> Send for RMatchIndices<'a, P> where
<P as Pattern<'a>>::Searcher: Send,`

### `impl<'a, P> Send for RMatches<'a, P> where
<P as Pattern<'a>>::Searcher: Send,`

### `impl<'a, P> Send for core::str::RSplit<'a, P> where
<P as Pattern<'a>>::Searcher: Send,`

### `impl<'a, P> Send for core::str::RSplitN<'a, P> where
<P as Pattern<'a>>::Searcher: Send,`

### `impl<'a, P> Send for RSplitTerminator<'a, P> where
<P as Pattern<'a>>::Searcher: Send,`

### `impl<'a, P> Send for core::str::Split<'a, P> where
<P as Pattern<'a>>::Searcher: Send,`

### `impl<'a, P> Send for core::str::SplitInclusive<'a, P> where
<P as Pattern<'a>>::Searcher: Send,`

### `impl<'a, P> Send for core::str::SplitN<'a, P> where
<P as Pattern<'a>>::Searcher: Send,`

### `impl<'a, P> Send for SplitTerminator<'a, P> where
<P as Pattern<'a>>::Searcher: Send,`

### `impl<'a, T> Send for core::result::Iter<'a, T> where
T: Sync,`

### `impl<'a, T> Send for core::result::IterMut<'a, T> where
T: Send,`

### `impl<'a, T> Send for Chunks<'a, T> where
T: Sync,`

### `impl<'a, T> Send for ChunksExact<'a, T> where
T: Sync,`

### `impl<'a, T> Send for ChunksExactMut<'a, T> where
T: Send,`

### `impl<'a, T> Send for ChunksMut<'a, T> where
T: Send,`

### `impl<'a, T> Send for RChunks<'a, T> where
T: Sync,`

### `impl<'a, T> Send for RChunksExact<'a, T> where
T: Sync,`

### `impl<'a, T> Send for RChunksExactMut<'a, T> where
T: Send,`

### `impl<'a, T> Send for RChunksMut<'a, T> where
T: Send,`

### `impl<'a, T> Send for Windows<'a, T> where
T: Sync,`

### `impl<'a, T, P> Send for core::slice::RSplit<'a, T, P> where
P: Send,
T: Sync,`

### `impl<'a, T, P> Send for RSplitMut<'a, T, P> where
P: Send,
T: Send,`

### `impl<'a, T, P> Send for core::slice::RSplitN<'a, T, P> where
P: Send,
T: Sync,`

### `impl<'a, T, P> Send for RSplitNMut<'a, T, P> where
P: Send,
T: Send,`

### `impl<'a, T, P> Send for core::slice::Split<'a, T, P> where
P: Send,
T: Sync,`

### `impl<'a, T, P> Send for core::slice::SplitInclusive<'a, T, P> where
P: Send,
T: Sync,`

### `impl<'a, T, P> Send for SplitInclusiveMut<'a, T, P> where
P: Send,
T: Send,`

### `impl<'a, T, P> Send for SplitMut<'a, T, P> where
P: Send,
T: Send,`

### `impl<'a, T, P> Send for core::slice::SplitN<'a, T, P> where
P: Send,
T: Sync,`

### `impl<'a, T, P> Send for SplitNMut<'a, T, P> where
P: Send,
T: Send,`

### `impl<'b, T> !Send for Ref<'b, T>`

### `impl<'b, T> !Send for RefMut<'b, T>`

### `impl<'f> !Send for VaListImpl<'f>`

### `impl<A> Send for Repeat<A> where
A: Send,`

### `impl<A> Send for core::option::IntoIter<A> where
A: Send,`

### `impl<A, B> Send for Chain<A, B> where
A: Send,
B: Send,`

### `impl<A, B> Send for Zip<A, B> where
A: Send,
B: Send,`

### `impl<F> Send for PollFn<F> where
F: Send,`

### `impl<F> Send for FromFn<F> where
F: Send,`

### `impl<F> Send for OnceWith<F> where
F: Send,`

### `impl<F> Send for RepeatWith<F> where
F: Send,`

### `impl<H> Send for BuildHasherDefault<H> where
H: Send,`

### `impl<I> Send for DecodeUtf16<I> where
I: Send,`

### `impl<I> Send for Cloned<I> where
I: Send,`

### `impl<I> Send for Copied<I> where
I: Send,`

### `impl<I> Send for Cycle<I> where
I: Send,`

### `impl<I> Send for Enumerate<I> where
I: Send,`

### `impl<I> Send for Flatten<I> where
I: Send,
<<I as Iterator>::Item as IntoIterator>::IntoIter: Send,`

### `impl<I> Send for Fuse<I> where
I: Send,`

### `impl<I> Send for Peekable<I> where
I: Send,
<I as Iterator>::Item: Send,`

### `impl<I> Send for Skip<I> where
I: Send,`

### `impl<I> Send for StepBy<I> where
I: Send,`

### `impl<I> Send for Take<I> where
I: Send,`

### `impl<I, F> Send for FilterMap<I, F> where
F: Send,
I: Send,`

### `impl<I, F> Send for Inspect<I, F> where
F: Send,
I: Send,`

### `impl<I, F> Send for Map<I, F> where
F: Send,
I: Send,`

### `impl<I, P> Send for Filter<I, P> where
I: Send,
P: Send,`

### `impl<I, P> Send for MapWhile<I, P> where
I: Send,
P: Send,`

### `impl<I, P> Send for SkipWhile<I, P> where
I: Send,
P: Send,`

### `impl<I, P> Send for TakeWhile<I, P> where
I: Send,
P: Send,`

### `impl<I, St, F> Send for Scan<I, St, F> where
F: Send,
I: Send,
St: Send,`

### `impl<I, U, F> Send for FlatMap<I, U, F> where
F: Send,
I: Send,
<U as IntoIterator>::IntoIter: Send,`

### `impl<Idx> Send for Range<Idx> where
Idx: Send,`

### `impl<Idx> Send for RangeFrom<Idx> where
Idx: Send,`

### `impl<Idx> Send for RangeInclusive<Idx> where
Idx: Send,`

### `impl<Idx> Send for RangeTo<Idx> where
Idx: Send,`

### `impl<Idx> Send for RangeToInclusive<Idx> where
Idx: Send,`

### `impl<P> Send for Pin<P> where
P: Send,`

### `impl<T> Send for Bound<T> where
T: Send,`

### `impl<T> Send for Option<T> where
T: Send,`

### `impl<T> Send for Poll<T> where
T: Send,`

### `impl<T> Send for Reverse<T> where
T: Send,`

### `impl<T> Send for Pending<T> where
T: Send,`

### `impl<T> Send for Ready<T> where
T: Send,`

### `impl<T> Send for Once<T> where
T: Send,`

### `impl<T> Send for Rev<T> where
T: Send,`

### `impl<T> Send for Discriminant<T> where
<T as DiscriminantKind>::Discriminant: Send,`

### `impl<T> Send for Wrapping<T> where
T: Send,`

### `impl<T> Send for core::result::IntoIter<T> where
T: Send,`

### `impl<T> Send for MaybeUninit<T> where
T: Send,`

### `impl<T, E> Send for Result<T, E> where
E: Send,
T: Send,`

### `impl<T, F> Send for Successors<T, F> where
F: Send,
T: Send,`

### `impl<T: ?Sized> Send for UnsafeCell<T> where
T: Send,`

### `impl<T: ?Sized> Send for PhantomData<T> where
T: Send,`

### `impl<T: ?Sized> Send for ManuallyDrop<T> where
T: Send,`

### `impl<Y, R> Send for GeneratorState<Y, R> where
R: Send,
Y: Send,`

### `impl<const N: usize, T> Send for core::array::IntoIter<T, N> where
T: Send,`

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