Struct RootPointer 

pub struct RootPointer {
    pub block_id: Option<BlockId>,
    pub checksum: u64,
}

A root pointer in the file header.

Points to a metadata root block and stores its xxHash (XXH3) checksum for integrity validation during crash recovery.

See [[architecture-storage-format#Atomic Commit Protocol]].

Fields

block_id: Option<BlockId>

Block containing the metadata root, or None if this slot has never been committed to.

checksum: u64

xxHash (XXH3-64) checksum of the metadata root block contents.

Implementations

impl RootPointer

pub const EMPTY: Self

A root pointer that has never been written.

pub const fn new(block_id: BlockId, checksum: u64) -> Self

Create a root pointer referencing a metadata block.

pub const fn is_populated(&self) -> bool

Whether this root pointer has been written to.

Trait Implementations

impl Clone for RootPointer

fn clone(&self) -> RootPointer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RootPointer

impl Debug for RootPointer

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

Formats the value using the given formatter.

impl Eq for RootPointer

impl PartialEq for RootPointer

fn eq(&self, other: &RootPointer) -> 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 RootPointer