Struct Arc 

pub struct Arc<T: Poolable> { /* private fields */ }

A poolable drop-in replacement for std::sync::Arc.

This Arc pools its allocations, reducing overhead when frequently creating and destroying Arc instances. When the last strong reference is dropped, the allocation is returned to the pool instead of being freed.

Example

use poolshark::global::arc::Arc;
use poolshark::global::RawPool;

let pool: RawPool<Arc<String>> = RawPool::new(1024, 1);
let arc1 = Arc::new(&pool, "hello".to_string());
let arc2 = arc1.clone();  // Reference counting works normally
drop(arc1);
drop(arc2);  // Returns to pool when last reference drops

Differences from std::sync::Arc

• Requires a pool to be created from
• Returns to pool when dropped (if strong_count == 1)
• Slightly larger memory footprint (stores pool pointer)

Implementations

impl<T: Poolable> Arc<T>

pub fn new(pool: &RawPool<Self>, v: T) -> Self

Allocate a new arc from the specified pool.

Returns an arc containing v.

pub fn get_mut(&mut self) -> Option<&mut T>

Get a mutable reference to the inner value if the Arc is unique.

Returns None if the Arc is not unique (strong_count > 1).

pub fn strong_count(&self) -> usize

Return the strong reference count of the arc.

pub fn as_ptr(&self) -> *const (WeakPool<Self>, T)

Return the arc as a raw pointer.

impl<T: Poolable + Clone> Arc<T>

pub fn make_mut<'a>(&'a mut self) -> &'a mut T

Get a mutable reference to the inner value, cloning if necessary.

If the Arc is not unique, this will clone the inner value.

impl<T: Poolable + Clone> Arc<T>

pub fn downgrade(&self) -> Weak<T>

Downgrade the Arc to a weak pointer.

pub fn weak_count(&self) -> usize

Return the weak reference count of the arc.

Trait Implementations

impl<T: Clone + Poolable> Clone for Arc<T>

fn clone(&self) -> Arc<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Poolable + Debug> Debug for Arc<T>

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

Formats the value using the given formatter.

impl<T: Poolable> Deref for Arc<T>

type Target = T

The resulting type after dereferencing.

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

Dereferences the value.

impl<T: Poolable> Drop for Arc<T>

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl<T: Poolable + Eq> Eq for Arc<T>

impl<T: Poolable + Hash> Hash for Arc<T>

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: Poolable + Ord> Ord for Arc<T>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<T: Poolable + PartialEq> PartialEq for Arc<T>

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

Equality operator ==.

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

Inequality operator !=.

impl<T: Poolable + PartialOrd> PartialOrd for Arc<T>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<T: Poolable> RawPoolable for Arc<T>

fn empty(pool: WeakPool<Self>) -> Self

allocate a new empty object and set it’s pool pointer to pool

fn capacity(&self) -> usize

return the capacity of the collection

fn reset(&mut self)

empty the collection and reset it to its default state so it can be put back in the pool

fn really_drop(self)

Actually drop the inner object, don’t put it back in the pool, make sure you do not call both this method and the drop implementation that puts the object back in the pool!