Struct WalSegment 

pub struct WalSegment {
    pub id: WalSegmentId,
    pub salt1: u32,
    pub salt2: u32,
    pub page_size: u32,
    pub frame_count: usize,
    pub checkpoint_seq: u32,
}

One salt epoch of a -wal file — a single bounded segment.

A -wal is a bounded segment, not an open-ended log: every live frame here shares (salt1, salt2). A checkpoint reset (salt change + frame renumber) starts a NEW WalSegment; it is a discontinuity, never another epoch of the same segment.

Fields

id: WalSegmentId

This segment’s ordinal within the WAL (0 = the segment at file start).

salt1: u32

WAL salt-1 (checkpoint generation), shared by every frame in the segment.

salt2: u32

WAL salt-2 (checkpoint generation), shared by every frame in the segment.

page_size: u32

Page size declared by the segment’s frames (bytes).

frame_count: usize

Number of frames belonging to this segment.

checkpoint_seq: u32

The checkpoint sequence number recorded in the WAL header (offset 12). For a segment discovered after a reset within the same file this is the header’s value; per-segment sequence is otherwise not separately recorded.

Trait Implementations

impl Clone for WalSegment

fn clone(&self) -> WalSegment

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WalSegment

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

Formats the value using the given formatter.

impl Eq for WalSegment

impl PartialEq for WalSegment

fn eq(&self, other: &WalSegment) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for WalSegment