Struct CardTable 

pub struct CardTable { /* private fields */ }

Card table for tracking old→young pointers.

Each byte covers a 512-byte region of memory. When a store into an old-gen object writes a pointer to a young-gen object, the corresponding card byte is set to 1 (dirty).

Implementations

impl CardTable

pub fn new(base: usize, size: usize) -> Self

Create a card table covering size bytes starting at base.

pub fn mark_dirty(&mut self, addr: usize)

Mark the card containing addr as dirty.

pub fn is_dirty(&self, addr: usize) -> bool

Check if the card containing addr is dirty.

pub fn clear(&mut self)

Clear all dirty cards.

pub fn for_each_dirty(&self, f: impl FnMut(usize, usize))

Iterate over dirty card ranges. Calls f(start_addr, end_addr) for each dirty card.

pub fn dirty_count(&self) -> usize

Number of dirty cards.

pub fn base(&self) -> usize

Get the base address covered by this card table.

pub fn covered_size(&self) -> usize

Get the total size covered by this card table.