Struct LPooled 

pub struct LPooled<T: IsoPoolable>(/* private fields */);

A zero-cost wrapper for thread-local pooled objects.

LPooled<T> automatically returns objects to the thread-local pool when dropped. This is the recommended default for most use cases as it’s faster than GPooled.

When to Use

• Default choice for pooling
• Objects created and dropped on the same thread
• Maximum performance is important

For producer-consumer patterns where one thread creates and other threads consume, use GPooled instead.

Example

use poolshark::local::LPooled;
use std::collections::HashMap;

fn process_request(data: &[(&str, i32)]) -> LPooled<HashMap<String, i32>> {
    // will reuse dropped HashMaps
    let mut map: LPooled<HashMap<String, i32>> = LPooled::take();
    for (k, v) in data {
        map.insert(k.to_string(), *v);
    }
    map
}

Behavior

• Minimal overhead: Same size as T on the stack, with thread-local lookup cost on drop and take
• Thread-safe: Can be sent between threads (implements Send + Sync if T does)
• Drop behavior: Returns to the pool of whichever thread drops it
• Automatic: No manual pool management required

Implementations

impl<T: IsoPoolable> LPooled<T>

pub fn take() -> Self

Take an object from the pool, or create one if the pool is empty.

This is the same as Default::default.

pub fn take_sz(max: usize, max_elements: usize) -> Self

Take an object from the pool with custom pool sizes.

Creates a new object if the pool is empty. Configures the pool sizes if not already set.

pub fn detach(self) -> T

Detach the object from the pool, returning the inner value.

The detached object will not be returned to the pool when dropped.

Trait Implementations

impl<T: IsoPoolable> AsRef<T> for LPooled<T>

fn as_ref(&self) -> &T

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

impl<T: IsoPoolable> Borrow<T> for LPooled<T>

fn borrow(&self) -> &T

Immutably borrows from an owned value.

impl Borrow<str> for LPooled<String>

fn borrow(&self) -> &str

Immutably borrows from an owned value.

impl<T: Clone + IsoPoolable> Clone for LPooled<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug + IsoPoolable> Debug for LPooled<T>

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

Formats the value using the given formatter.

impl<T: IsoPoolable> Default for LPooled<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: IsoPoolable> Deref for LPooled<T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<T: IsoPoolable> DerefMut for LPooled<T>

fn deref_mut(&mut self) -> &mut T

Mutably dereferences the value.

impl<'de, T: IsoPoolable + DeserializeOwned + 'static> Deserialize<'de> for LPooled<T>

Available on crate feature serde only.

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T: IsoPoolable + Display> Display for LPooled<T>

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

Formats the value using the given formatter.

impl<T: IsoPoolable> Drop for LPooled<T>

fn drop(&mut self)

Executes the destructor for this type.

impl<T: IsoPoolable + Extend<E>, E> Extend<E> for LPooled<T>

fn extend<I: IntoIterator<Item = E>>(&mut self, iter: I)

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

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

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

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

Reserves capacity in a collection for the given number of additional elements.

impl<T: IsoPoolable> From<T> for LPooled<T>

fn from(t: T) -> Self

Converts to this type from the input type.

impl<T: IsoPoolable + Extend<E>, E> FromIterator<E> for LPooled<T>

fn from_iter<I: IntoIterator<Item = E>>(iter: I) -> Self

Creates a value from an iterator.

impl<T: Hash + IsoPoolable> Hash for LPooled<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: Ord + IsoPoolable> Ord for LPooled<T>

fn cmp(&self, other: &LPooled<T>) -> 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: PartialEq + IsoPoolable> PartialEq for LPooled<T>

fn eq(&self, other: &LPooled<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: PartialOrd + IsoPoolable> PartialOrd for LPooled<T>

fn partial_cmp(&self, other: &LPooled<T>) -> 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: IsoPoolable + Serialize> Serialize for LPooled<T>

Available on crate feature serde only.

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<T: Eq + IsoPoolable> Eq for LPooled<T>

impl<T: IsoPoolable> StructuralPartialEq for LPooled<T>