Struct MarkerSegmentHeader 

pub struct MarkerSegmentHeader {
    pub segment_id: u64,
    pub start_commit_seq: u64,
}

On-disk segment header for the commit marker stream.

Layout (36 bytes, all LE):

  magic           : [u8; 4]   — "FSMK"
  version         : u32       — 1
  segment_id      : u64       — monotonic identifier
  start_commit_seq: u64       — first commit_seq in this segment
  record_size     : u32       — bytes per record (88 in V1)
  header_xxh3     : u64       — xxhash3 of all preceding fields

Fields

segment_id: u64

Monotonic segment identifier (matches filename).

start_commit_seq: u64

First commit_seq stored in this segment.

Implementations

impl MarkerSegmentHeader

pub const fn new(segment_id: u64, start_commit_seq: u64) -> Self

Create a new header for the given segment.

pub fn encode(&self) -> [u8; 36]

Encode to exactly MARKER_SEGMENT_HEADER_BYTES bytes.

pub fn decode(data: &[u8]) -> Result<Self, MarkerError>

Decode from a byte slice. Validates magic, version, record_size, and checksum.

Trait Implementations

impl Clone for MarkerSegmentHeader

fn clone(&self) -> MarkerSegmentHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MarkerSegmentHeader

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

Formats the value using the given formatter.

impl PartialEq for MarkerSegmentHeader

fn eq(&self, other: &MarkerSegmentHeader) -> 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 Copy for MarkerSegmentHeader

impl Eq for MarkerSegmentHeader

impl StructuralPartialEq for MarkerSegmentHeader