Struct swap::file::PageState

struct PageState(u32);

u32 to pack the state of a guest memory page.

• If the page is not on the swap file, the value is zero.
• MSB: Whether the page is stale or not. (0: stale, 1: present).
• lower 31 bits: The corresponding file page index + 1. Never be zero.

Tuple Fields

0: u32

Implementations

impl PageState

const IDX_FILE_MASK: u32 = 2_147_483_647u32

const PRESENT_BIT_MASK: u32 = 2_147_483_648u32

fn is_none(&self) -> bool

fn idx_file(&self) -> Option<usize>

fn is_present(&self) -> bool

fn update(&mut self, idx_file: usize)

fn mark_as_present(&mut self)

fn clear(&mut self)

fn free(&mut self)

Trait Implementations

impl Clone for PageState

fn clone(&self) -> PageState

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PageState

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

Formats the value using the given formatter.