Struct StatefulCount 

pub struct StatefulCount(/* private fields */);

Atomic counter for stateful connections on a backend

Implementations

impl StatefulCount

pub fn new() -> Self

Create a new stateful count initialized to zero

pub fn get(&self) -> usize

Get the current stateful count

pub fn try_acquire(&self, max_stateful: usize) -> bool

Try to acquire a stateful slot (compare-exchange loop)

Returns true if successfully incremented below max_stateful limit

pub fn release(&self) -> Result<usize, usize>

Release a stateful slot (decrement if > 0)

Returns Ok(previous_value) if successfully decremented, Err(0) if already zero

Errors

Returns Err(0) when the counter is already zero and cannot be decremented.

Trait Implementations

impl AsRef<Arc<Atomic<usize>>> for StatefulCount

fn as_ref(&self) -> &Arc<AtomicUsize>

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for StatefulCount

fn clone(&self) -> StatefulCount

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StatefulCount

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

Formats the value using the given formatter.

impl Default for StatefulCount

fn default() -> Self

Returns the “default value” for a type.

impl Deref for StatefulCount

type Target = Arc<Atomic<usize>>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Display for StatefulCount

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

Formats the value using the given formatter.

impl Eq for StatefulCount

impl From<Arc<Atomic<usize>>> for StatefulCount

fn from(value: Arc<AtomicUsize>) -> Self

Converts to this type from the input type.

impl PartialEq for StatefulCount

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialEq<usize> for StatefulCount

fn eq(&self, other: &usize) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.