Trait nom::lib::std::prelude::v1::v1::Sync 1.0.0[−][src]
#[lang = "sync"]pub unsafe auto trait Sync { }
Types for which it is safe to share references between threads.
This trait is automatically implemented when the compiler determines it's appropriate.
The precise definition is: a type T
is Sync
if and only if &T
is
Send
. In other words, if there is no possibility of
undefined behavior (including data races) when passing
&T
references between threads.
As one would expect, primitive types like u8
and f64
are all Sync
, and so are simple aggregate types containing them,
like tuples, structs and enums. More examples of basic Sync
types include "immutable" types like &T
, and those with simple
inherited mutability, such as Box<T>
, Vec<T>
and
most other collection types. (Generic parameters need to be Sync
for their container to be Sync
.)
A somewhat surprising consequence of the definition is that &mut T
is Sync
(if T
is Sync
) even though it seems like that might
provide unsynchronized mutation. The trick is that a mutable
reference behind a shared reference (that is, & &mut T
)
becomes read-only, as if it were a & &T
. Hence there is no risk
of a data race.
Types that are not Sync
are those that have "interior
mutability" in a non-thread-safe form, such as cell::Cell
and cell::RefCell
. These types allow for mutation of
their contents even through an immutable, shared reference. For
example the set
method on Cell<T>
takes &self
, so it requires
only a shared reference &Cell<T>
. The method performs no
synchronization, thus Cell
cannot be Sync
.
Another example of a non-Sync
type is the reference-counting
pointer rc::Rc
. Given any reference &Rc<T>
, you can clone
a new Rc<T>
, modifying the reference counts in a non-atomic way.
For cases when one does need thread-safe interior mutability,
Rust provides atomic data types, as well as explicit locking via
sync::Mutex
and sync::RwLock
. These types
ensure that any mutation cannot cause data races, hence the types
are Sync
. Likewise, sync::Arc
provides a thread-safe
analogue of Rc
.
Any types with interior mutability must also use the
cell::UnsafeCell
wrapper around the value(s) which
can be mutated through a shared reference. Failing to doing this is
undefined behavior. For example, transmute
-ing
from &T
to &mut T
is invalid.
See the Nomicon for more
details about Sync
.
Implementations on Foreign Types
impl<T> !Sync for Receiver<T>
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impl<T> !Sync for Receiver<T>
impl<'a, T> Sync for MutexGuard<'a, T> where
T: Sync + ?Sized,
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impl<'a, T> Sync for MutexGuard<'a, T> where
T: Sync + ?Sized,
impl !Sync for ArgsOs
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impl !Sync for ArgsOs
impl<T> Sync for RwLock<T> where
T: Send + Sync + ?Sized,
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impl<T> Sync for RwLock<T> where
T: Send + Sync + ?Sized,
impl<'a, T> Sync for RwLockReadGuard<'a, T> where
T: Sync + ?Sized,
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impl<'a, T> Sync for RwLockReadGuard<'a, T> where
T: Sync + ?Sized,
impl<T> Sync for Key<T>
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impl<T> Sync for Key<T>
impl Sync for Once
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impl Sync for Once
impl<'a, T> Sync for RwLockWriteGuard<'a, T> where
T: Sync + ?Sized,
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impl<'a, T> Sync for RwLockWriteGuard<'a, T> where
T: Sync + ?Sized,
impl !Sync for Args
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impl !Sync for Args
impl<T> Sync for Mutex<T> where
T: Send + ?Sized,
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impl<T> Sync for Mutex<T> where
T: Send + ?Sized,
impl<T> !Sync for Sender<T>
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impl<T> !Sync for Sender<T>
impl<T> Sync for AtomicPtr<T>
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impl<T> Sync for AtomicPtr<T>
impl Sync for AtomicU32
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impl Sync for AtomicU32
impl Sync for AtomicBool
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impl Sync for AtomicBool
impl Sync for AtomicI32
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impl Sync for AtomicI32
impl Sync for AtomicU8
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impl Sync for AtomicU8
impl Sync for AtomicU64
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impl Sync for AtomicU64
impl Sync for AtomicUsize
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impl Sync for AtomicUsize
impl Sync for AtomicI16
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impl Sync for AtomicI16
impl Sync for AtomicU16
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impl Sync for AtomicU16
impl Sync for AtomicIsize
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impl Sync for AtomicIsize
impl<T> !Sync for *const T where
T: ?Sized,
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impl<T> !Sync for *const T where
T: ?Sized,
impl<T> !Sync for NonNull<T> where
T: ?Sized,
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impl<T> !Sync for NonNull<T> where
T: ?Sized,
NonNull
pointers are not Sync
because the data they reference may be aliased.
impl<T> !Sync for RefCell<T> where
T: ?Sized,
[src]
impl<T> !Sync for RefCell<T> where
T: ?Sized,
impl<T> !Sync for Cell<T>
[src]
impl<T> !Sync for Cell<T>
impl Sync for AtomicI64
[src]
impl Sync for AtomicI64
impl<T> !Sync for *mut T where
T: ?Sized,
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impl<T> !Sync for *mut T where
T: ?Sized,
impl<T> !Sync for UnsafeCell<T> where
T: ?Sized,
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impl<T> !Sync for UnsafeCell<T> where
T: ?Sized,
impl Sync for AtomicI8
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impl Sync for AtomicI8
impl<T> Sync for Weak<T> where
T: Send + Sync + ?Sized,
[src]
impl<T> Sync for Weak<T> where
T: Send + Sync + ?Sized,
impl<T> Sync for Arc<T> where
T: Send + Sync + ?Sized,
[src]
impl<T> Sync for Arc<T> where
T: Send + Sync + ?Sized,
impl<T> !Sync for Weak<T> where
T: ?Sized,
[src]
impl<T> !Sync for Weak<T> where
T: ?Sized,
impl<T> !Sync for Rc<T> where
T: ?Sized,
[src]
impl<T> !Sync for Rc<T> where
T: ?Sized,
impl<T> Sync for ThreadLocal<T> where
T: Send + ?Sized,
impl<T> Sync for ThreadLocal<T> where
T: Send + ?Sized,
impl<T> Sync for CachedThreadLocal<T> where
T: Send + ?Sized,
impl<T> Sync for CachedThreadLocal<T> where
T: Send + ?Sized,
impl Sync for isize
impl Sync for isize
impl Sync for i8
impl Sync for i8
impl Sync for i16
impl Sync for i16
impl Sync for i32
impl Sync for i32
impl Sync for i64
impl Sync for i64
impl Sync for i128
impl Sync for i128
impl Sync for usize
impl Sync for usize
impl Sync for u8
impl Sync for u8
impl Sync for u16
impl Sync for u16
impl Sync for u32
impl Sync for u32
impl Sync for u64
impl Sync for u64
impl Sync for u128
impl Sync for u128
impl Sync for f32
impl Sync for f32
impl Sync for f64
impl Sync for f64
impl Sync for f32
impl Sync for f32
impl Sync for f64
impl Sync for f64
impl Sync for char
impl Sync for char
impl Sync for str
impl Sync for str
impl Sync for str
impl Sync for str
impl Sync for Argument
impl Sync for Argument
impl Sync for FormatSpec
impl Sync for FormatSpec
impl Sync for Alignment
impl Sync for Alignment
impl Sync for Count
impl Sync for Count
impl Sync for Position
impl Sync for Position
Implementors
impl<'a, T> Sync for nom::lib::std::slice::Iter<'a, T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::slice::IterMut<'a, T> where
T: Sync,impl<T> Sync for nom::lib::std::vec::IntoIter<T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::vec_deque::Drain<'a, T> where
T: Sync,impl<T> Sync for LinkedList<T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::vec::Drain<'a, T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::linked_list::IterMut<'a, T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::linked_list::Iter<'a, T> where
T: Sync,impl<'a> Sync for nom::lib::std::string::Drain<'a>
Auto implementors
impl Sync for CompareResult
impl<E> Sync for ErrorKind<E> where
E: Sync,impl Sync for Needed
impl<I, E> Sync for Err<I, E> where
E: Sync,
I: Sync,impl Sync for Endianness
impl<T: ?Sized> Sync for Box<T> where
T: Sync,impl<T: ?Sized> Sync for PinBox<T> where
T: Sync,impl Sync for Ordering
impl<T> Sync for Reverse<T> where
T: Sync,impl Sync for RandomState
impl<'a, K, V> Sync for nom::lib::std::collections::hash_map::Drain<'a, K, V> where
K: Sync,
V: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::hash_map::ValuesMut<'a, K, V> where
K: Sync,
V: Sync,impl<'a, K, V> !Sync for nom::lib::std::collections::hash_map::VacantEntry<'a, K, V>
impl<'a, K, V> Sync for nom::lib::std::collections::hash_map::Keys<'a, K, V> where
K: Sync,
V: Sync,impl<K, V> Sync for nom::lib::std::collections::hash_map::IntoIter<K, V> where
K: Sync,
V: Sync,impl<'a, K, V> !Sync for nom::lib::std::collections::hash_map::Entry<'a, K, V>
impl<'a, K, V> Sync for nom::lib::std::collections::hash_map::Values<'a, K, V> where
K: Sync,
V: Sync,impl<'a, K, V> !Sync for nom::lib::std::collections::hash_map::OccupiedEntry<'a, K, V>
impl Sync for DefaultHasher
impl<K, V, S> Sync for HashMap<K, V, S> where
K: Sync,
S: Sync,
V: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::hash_map::Iter<'a, K, V> where
K: Sync,
V: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::hash_map::IterMut<'a, K, V> where
K: Sync,
V: Sync,impl<'a, T, S> Sync for nom::lib::std::collections::hash_set::SymmetricDifference<'a, T, S> where
S: Sync,
T: Sync,impl<'a, K> Sync for nom::lib::std::collections::hash_set::Drain<'a, K> where
K: Sync,impl<'a, T, S> Sync for nom::lib::std::collections::hash_set::Intersection<'a, T, S> where
S: Sync,
T: Sync,impl<T, S> Sync for HashSet<T, S> where
S: Sync,
T: Sync,impl<K> Sync for nom::lib::std::collections::hash_set::IntoIter<K> where
K: Sync,impl<'a, T, S> Sync for nom::lib::std::collections::hash_set::Difference<'a, T, S> where
S: Sync,
T: Sync,impl<'a, T, S> Sync for nom::lib::std::collections::hash_set::Union<'a, T, S> where
S: Sync,
T: Sync,impl<'a, K> Sync for nom::lib::std::collections::hash_set::Iter<'a, K> where
K: Sync,impl<T> Sync for BinaryHeap<T> where
T: Sync,impl<'a, T> Sync for PeekMut<'a, T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::binary_heap::Iter<'a, T> where
T: Sync,impl<T> Sync for nom::lib::std::collections::binary_heap::IntoIter<T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::binary_heap::Drain<'a, T> where
T: Sync,impl<T> Sync for BTreeSet<T> where
T: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::btree_map::Keys<'a, K, V> where
K: Sync,
V: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::btree_map::VacantEntry<'a, K, V> where
K: Sync,
V: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::btree_map::Iter<'a, K, V> where
K: Sync,
V: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::btree_map::OccupiedEntry<'a, K, V> where
K: Sync,
V: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::btree_map::Range<'a, K, V> where
K: Sync,
V: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::btree_map::ValuesMut<'a, K, V> where
K: Sync,
V: Sync,impl<K, V> Sync for BTreeMap<K, V> where
K: Sync,
V: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::btree_map::Entry<'a, K, V> where
K: Sync,
V: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::btree_map::IterMut<'a, K, V> where
K: Sync,
V: Sync,impl<K, V> Sync for nom::lib::std::collections::btree_map::IntoIter<K, V> where
K: Sync,
V: Sync,impl<'a, K, V> Sync for nom::lib::std::collections::btree_map::Values<'a, K, V> where
K: Sync,
V: Sync,impl<'a, K, V> Sync for RangeMut<'a, K, V> where
K: Sync,
V: Sync,impl<T> Sync for VecDeque<T> where
T: Sync,impl<T> Sync for nom::lib::std::collections::linked_list::IntoIter<T> where
T: Sync,impl<'a, T, F> !Sync for nom::lib::std::collections::linked_list::DrainFilter<'a, T, F>
impl<T> Sync for Bound<T> where
T: Sync,impl Sync for CollectionAllocErr
impl<'a, T> Sync for nom::lib::std::collections::vec_deque::Iter<'a, T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::vec_deque::IterMut<'a, T> where
T: Sync,impl<T> Sync for nom::lib::std::collections::vec_deque::IntoIter<T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::btree_set::Union<'a, T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::btree_set::SymmetricDifference<'a, T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::btree_set::Difference<'a, T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::btree_set::Iter<'a, T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::btree_set::Range<'a, T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::collections::btree_set::Intersection<'a, T> where
T: Sync,impl<T> Sync for nom::lib::std::collections::btree_set::IntoIter<T> where
T: Sync,impl<'a, 'b> !Sync for DebugList<'a, 'b>
impl Sync for Error
impl<'a, 'b> !Sync for DebugTuple<'a, 'b>
impl<'a, 'b> !Sync for DebugStruct<'a, 'b>
impl<'a> !Sync for Formatter<'a>
impl<'a, 'b> !Sync for DebugSet<'a, 'b>
impl<'a, 'b> !Sync for DebugMap<'a, 'b>
impl<'a> !Sync for Arguments<'a>
impl<H> Sync for BuildHasherDefault<H> where
H: Sync,impl Sync for SipHasher
impl<T> Sync for Rev<T> where
T: Sync,impl<I> Sync for Cloned<I> where
I: Sync,impl<I> Sync for Cycle<I> where
I: Sync,impl<I> Sync for StepBy<I> where
I: Sync,impl<A, B> Sync for Chain<A, B> where
A: Sync,
B: Sync,impl<A, B> Sync for Zip<A, B> where
A: Sync,
B: Sync,impl<I, F> Sync for Map<I, F> where
F: Sync,
I: Sync,impl<I, P> Sync for Filter<I, P> where
I: Sync,
P: Sync,impl<I, F> Sync for FilterMap<I, F> where
F: Sync,
I: Sync,impl<I> Sync for Enumerate<I> where
I: Sync,impl<I> Sync for Peekable<I> where
I: Sync,
<I as Iterator>::Item: Sync,impl<I, P> Sync for SkipWhile<I, P> where
I: Sync,
P: Sync,impl<I, P> Sync for TakeWhile<I, P> where
I: Sync,
P: Sync,impl<I> Sync for Skip<I> where
I: Sync,impl<I> Sync for Take<I> where
I: Sync,impl<I, St, F> Sync for Scan<I, St, F> where
F: Sync,
I: Sync,
St: Sync,impl<I, U, F> Sync for FlatMap<I, U, F> where
F: Sync,
I: Sync,
<U as IntoIterator>::IntoIter: Sync,impl<I> Sync for Flatten<I> where
I: Sync,
<<I as Iterator>::Item as IntoIterator>::IntoIter: Sync,impl<I> Sync for Fuse<I> where
I: Sync,impl<I, F> Sync for Inspect<I, F> where
F: Sync,
I: Sync,impl<F> Sync for RepeatWith<F> where
F: Sync,impl<T> Sync for nom::lib::std::iter::Once<T> where
T: Sync,impl<T> Sync for Empty<T> where
T: Sync,impl<A> Sync for Repeat<A> where
A: Sync,impl<T> Sync for Discriminant<T>
impl<T> Sync for ManuallyDrop<T> where
T: Sync,impl<'a, T: ?Sized> Sync for PinMut<'a, T> where
T: Sync,impl<Y, R> Sync for GeneratorState<Y, R> where
R: Sync,
Y: Sync,impl Sync for RangeFull
impl<Idx> Sync for RangeToInclusive<Idx> where
Idx: Sync,impl<Idx> Sync for RangeInclusive<Idx> where
Idx: Sync,impl<Idx> Sync for RangeFrom<Idx> where
Idx: Sync,impl<Idx> Sync for nom::lib::std::ops::Range<Idx> where
Idx: Sync,impl<Idx> Sync for RangeTo<Idx> where
Idx: Sync,impl<T> Sync for Option<T> where
T: Sync,impl<'a, A> Sync for nom::lib::std::option::Iter<'a, A> where
A: Sync,impl<'a, A> Sync for nom::lib::std::option::IterMut<'a, A> where
A: Sync,impl<A> Sync for nom::lib::std::option::IntoIter<A> where
A: Sync,impl Sync for NoneError
impl<T, E> Sync for Result<T, E> where
E: Sync,
T: Sync,impl<'a, T> Sync for nom::lib::std::result::Iter<'a, T> where
T: Sync,impl<'a, T> Sync for nom::lib::std::result::IterMut<'a, T> where
T: Sync,impl<T> Sync for nom::lib::std::result::IntoIter<T> where
T: Sync,impl<'a, T, P> Sync for SplitMut<'a, T, P> where
P: Sync,
T: Sync,impl<'a, T, P> Sync for SplitNMut<'a, T, P> where
P: Sync,
T: Sync,impl<'a, T> Sync for Windows<'a, T> where
T: Sync,impl<'a, T, P> Sync for nom::lib::std::slice::RSplitN<'a, T, P> where
P: Sync,
T: Sync,impl<'a, T> Sync for ExactChunksMut<'a, T> where
T: Sync,impl<'a, T, P> Sync for nom::lib::std::slice::Split<'a, T, P> where
P: Sync,
T: Sync,impl<'a, T, P> Sync for nom::lib::std::slice::SplitN<'a, T, P> where
P: Sync,
T: Sync,impl<'a, T, P> Sync for nom::lib::std::slice::RSplit<'a, T, P> where
P: Sync,
T: Sync,impl<'a, T> Sync for ExactChunks<'a, T> where
T: Sync,impl<'a, T> Sync for Chunks<'a, T> where
T: Sync,impl<'a, T, P> Sync for RSplitNMut<'a, T, P> where
P: Sync,
T: Sync,impl<'a, T> Sync for ChunksMut<'a, T> where
T: Sync,impl<'a, T, P> Sync for RSplitMut<'a, T, P> where
P: Sync,
T: Sync,impl Sync for ParseBoolError
impl<'a, P> Sync for SplitTerminator<'a, P> where
<P as Pattern<'a>>::Searcher: Sync,impl Sync for Utf8Error
impl<'a> Sync for EncodeUtf16<'a>
impl<'a, P> Sync for MatchIndices<'a, P> where
<P as Pattern<'a>>::Searcher: Sync,impl Sync for SearchStep
impl<'a> Sync for CharSearcher<'a>
impl<'a, 'b> Sync for CharSliceSearcher<'a, 'b>
impl<'a, F> Sync for CharPredicateSearcher<'a, F> where
F: Sync,impl<'a, 'b> Sync for StrSearcher<'a, 'b>
impl<'a> Sync for Chars<'a>
impl<'a, P> Sync for nom::lib::std::str::RSplitN<'a, P> where
<P as Pattern<'a>>::Searcher: Sync,impl<'a, P> Sync for RMatches<'a, P> where
<P as Pattern<'a>>::Searcher: Sync,impl<'a, P> Sync for nom::lib::std::str::Split<'a, P> where
<P as Pattern<'a>>::Searcher: Sync,impl<'a, P> Sync for nom::lib::std::str::SplitN<'a, P> where
<P as Pattern<'a>>::Searcher: Sync,impl<'a, P> Sync for nom::lib::std::str::RSplit<'a, P> where
<P as Pattern<'a>>::Searcher: Sync,impl<'a, P> Sync for Matches<'a, P> where
<P as Pattern<'a>>::Searcher: Sync,impl<'a> Sync for LinesAny<'a>
impl<'a> Sync for Lines<'a>
impl<'a> Sync for Bytes<'a>
impl<'a> Sync for SplitWhitespace<'a>
impl<'a, P> Sync for RSplitTerminator<'a, P> where
<P as Pattern<'a>>::Searcher: Sync,impl<'a, P> Sync for RMatchIndices<'a, P> where
<P as Pattern<'a>>::Searcher: Sync,impl<'a> Sync for CharIndices<'a>
impl Sync for String
impl Sync for FromUtf8Error
impl Sync for FromUtf16Error
impl Sync for ParseError
impl<T> Sync for Vec<T> where
T: Sync,impl<'a, I> Sync for Splice<'a, I> where
I: Sync,
<I as Iterator>::Item: Sync,impl<'a, T, F> Sync for nom::lib::std::vec::DrainFilter<'a, T, F> where
F: Sync,
T: Sync,impl<I, E> Sync for Context<I, E> where
E: Sync,
I: Sync,impl<'a> Sync for CompleteStr<'a>
impl<'a> Sync for CompleteByteSlice<'a>
impl<T> Sync for Input<T> where
T: Sync,