Struct UnclaimedPages 

pub struct UnclaimedPages { /* private fields */ }

On-disk representation of the unclaimed-pages ledger.

The ledger is a LIFO stack of Page numbers. Push appends, pop removes from the tail.

Implementations

impl UnclaimedPages

pub fn new() -> Self

Returns an empty ledger.

pub fn len(&self) -> usize

Returns the number of pages currently in the ledger.

pub fn remaining_capacity(&self) -> u32

Returns how many additional pages can still be tracked.

pub fn is_empty(&self) -> bool

Returns true when no pages are currently tracked.

pub fn pop(&mut self) -> Option<Page>

Removes and returns the last unclaimed page, if any.

pub fn push(&mut self, page: Page) -> MemoryResult<()>

Appends page to the ledger.

Errors

MemoryError::UnclaimedPagesFull when the ledger is at capacity.

pub fn as_slice(&self) -> &[Page]

Returns a slice over the tracked pages (oldest first).

Trait Implementations

impl Clone for UnclaimedPages

fn clone(&self) -> UnclaimedPages

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UnclaimedPages

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

Formats the value using the given formatter.

impl Default for UnclaimedPages

fn default() -> UnclaimedPages

Returns the “default value” for a type.

impl Encode for UnclaimedPages

const SIZE: DataSize = DataSize::Dynamic

The size characteristic of the data type.

const ALIGNMENT: PageOffset = DEFAULT_ALIGNMENT

The alignment requirement in bytes for the data type.

fn encode(&self) -> Cow<'_, [u8]>

Encodes the data type into a vector of bytes.

fn decode(data: Cow<'_, [u8]>) -> MemoryResult<Self>

where Self: Sized,

Decodes the data type from a slice of bytes.

fn size(&self) -> MSize

Returns the size in bytes of the encoded data type.

impl PartialEq for UnclaimedPages

fn eq(&self, other: &UnclaimedPages) -> 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 Eq for UnclaimedPages

impl StructuralPartialEq for UnclaimedPages