Struct Page 

pub struct Page {
    pub id: PageId,
    pub data: Vec<u8>,
    pub version: u64,
    pub ref_count: u32,
    pub checksum: u64,
}

A single page of storage data with versioning and CoW reference counting.

Fields

id: PageId

Identifier of this page.

data: Vec<u8>

Raw byte content.

version: u64

Monotonically increasing write counter for this page slot.

ref_count: u32

Number of snapshot+current references to this exact (id, version) pair. When ref_count drops to zero the page can be garbage-collected.

checksum: u64

FNV-1a 64-bit checksum of data.

Implementations

impl Page

pub fn new(id: PageId, data: Vec<u8>, version: u64) -> Self

Construct a new Page, computing its checksum automatically.

pub fn verify_checksum(&self) -> bool

Re-verify the stored checksum against the actual data.

Trait Implementations

impl Clone for Page

fn clone(&self) -> Page

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Page

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

Formats the value using the given formatter.

impl Eq for Page

impl PartialEq for Page

fn eq(&self, other: &Page) -> 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 StructuralPartialEq for Page