Struct RcBitmask 

pub struct RcBitmask { /* private fields */ }

Compact reference count tracking using a bitmask. Supports up to 64 objects, each with a 1-bit “alive” flag.

Implementations

impl RcBitmask

pub fn new() -> Self

Create an empty bitmask (all dead).

pub fn set_alive(&mut self, i: u32)

Mark slot i as alive (0 <= i < 64).

pub fn set_dead(&mut self, i: u32)

Mark slot i as dead.

pub fn is_alive(&self, i: u32) -> bool

Check if slot i is alive.

pub fn alive_count(&self) -> u32

Count alive slots.

pub fn dead_count(&self) -> u32

Count dead slots.

pub fn first_dead(&self) -> Option<u32>

Find the first dead slot (for allocation).

pub fn first_alive(&self) -> Option<u32>

Find the first alive slot.

pub fn raw(&self) -> u64

Raw bitmask value.

Trait Implementations

impl Default for RcBitmask

fn default() -> Self

Returns the “default value” for a type.

impl Display for RcBitmask

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

Formats the value using the given formatter.