Struct AtomicAncestorState

struct AtomicAncestorState(AtomicUsize);

A wrapper around AncestorState which can be safely shared between threads.

This type uses an AtomicUsize to store the enum value.

Tuple Fields

0: AtomicUsize

Implementations

impl AtomicAncestorState

const fn to_usize(val: AncestorState) -> usize

fn from_usize(val: usize) -> AncestorState

pub const fn new(v: AncestorState) -> AtomicAncestorState

Creates a new atomic AncestorState.

pub fn into_inner(self) -> AncestorState

Consumes the atomic and returns the contained value.

This is safe because passing self by value guarantees that no other threads are concurrently accessing the atomic data.

pub fn set(&mut self, v: AncestorState)

Sets the value of the atomic without performing an atomic operation.

This is safe because the mutable reference guarantees that no other threads are concurrently accessing the atomic data.

pub fn get(&mut self) -> AncestorState

Gets the value of the atomic without performing an atomic operation.

This is safe because the mutable reference guarantees that no other threads are concurrently accessing the atomic data.

pub fn swap_mut(&mut self, v: AncestorState) -> AncestorState

Stores a value into the atomic, returning the previous value, without performing an atomic operation.

This is safe because the mutable reference guarantees that no other threads are concurrently accessing the atomic data.

pub fn load(&self, order: Ordering) -> AncestorState

Loads a value from the atomic.

load takes an Ordering argument which describes the memory ordering of this operation. Possible values are SeqCst, Acquire and Relaxed.

Panics

Panics if order is Release or AcqRel.

pub fn store(&self, val: AncestorState, order: Ordering)

Stores a value into the atomic.

store takes an Ordering argument which describes the memory ordering of this operation. Possible values are SeqCst, Release and Relaxed.

Panics

Panics if order is Acquire or AcqRel.

impl AtomicAncestorState

pub fn swap(&self, val: AncestorState, order: Ordering) -> AncestorState

Stores a value into the atomic, returning the previous value.

swap takes an Ordering argument which describes the memory ordering of this operation. All ordering modes are possible. Note that using Acquire makes the store part of this operation Relaxed, and using Release makes the load part Relaxed.

pub fn compare_and_swap( &self, current: AncestorState, new: AncestorState, order: Ordering, ) -> AncestorState

👎Deprecated: Use compare_exchange or compare_exchange_weak instead

Stores a value into the atomic if the current value is the same as the current value.

The return value is always the previous value. If it is equal to current, then the value was updated.

compare_and_swap also takes an Ordering argument which describes the memory ordering of this operation. Notice that even when using AcqRel, the operation might fail and hence just perform an Acquire load, but not have Release semantics. Using Acquire makes the store part of this operation Relaxed if it happens, and using Release makes the load part Relaxed.

pub fn compare_exchange( &self, current: AncestorState, new: AncestorState, success: Ordering, failure: Ordering, ) -> Result<AncestorState, AncestorState>

Stores a value into the atomic if the current value is the same as the current value.

The return value is a result indicating whether the new value was written and containing the previous value. On success this value is guaranteed to be equal to current.

compare_exchange takes two Ordering arguments to describe the memory ordering of this operation. The first describes the required ordering if the operation succeeds while the second describes the required ordering when the operation fails. Using Acquire as success ordering makes the store part of this operation Relaxed, and using Release makes the successful load Relaxed. The failure ordering can only be SeqCst, Acquire or Relaxed and must be equivalent to or weaker than the success ordering.

pub fn compare_exchange_weak( &self, current: AncestorState, new: AncestorState, success: Ordering, failure: Ordering, ) -> Result<AncestorState, AncestorState>

Stores a value into the atomic if the current value is the same as the current value.

Unlike compare_exchange, this function is allowed to spuriously fail even when the comparison succeeds, which can result in more efficient code on some platforms. The return value is a result indicating whether the new value was written and containing the previous value.

compare_exchange_weak takes two Ordering arguments to describe the memory ordering of this operation. The first describes the required ordering if the operation succeeds while the second describes the required ordering when the operation fails. Using Acquire as success ordering makes the store part of this operation Relaxed, and using Release makes the successful load Relaxed. The failure ordering can only be SeqCst, Acquire or Relaxed and must be equivalent to or weaker than the success ordering.

Trait Implementations

impl Debug for AtomicAncestorState

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<AncestorState> for AtomicAncestorState

fn from(val: AncestorState) -> AtomicAncestorState

Converts to this type from the input type.