Struct Checkpoint 

pub struct Checkpoint {
    pub version: u32,
    pub timestamp: u64,
    pub step: u64,
    pub sim_time: f64,
    pub state: Vec<u8>,
    pub checksum: u32,
}

A single simulation snapshot with version, timestamp, and raw state bytes.

Checkpoint is a self-contained snapshot that can be serialized to bytes, compared with CheckpointDiff, or stored in a CheckpointCatalog.

Fields

version: u32

Monotonically increasing version counter for this checkpoint sequence.

timestamp: u64

Unix timestamp (seconds since epoch) when this checkpoint was taken.

step: u64

Simulation step number.

sim_time: f64

Simulation time in seconds or simulation units.

state: Vec<u8>

Arbitrary raw simulation state bytes.

checksum: u32

CRC-32 checksum of state (set by Checkpoint::compute_checksum).

Implementations

impl Checkpoint

pub fn new( version: u32, timestamp: u64, step: u64, sim_time: f64, state: Vec<u8>, ) -> Self

Construct a new Checkpoint, computing the checksum automatically.

pub fn compute_checksum(&mut self)

Recompute and store the checksum from the current state.

pub fn verify(&self) -> bool

Verify that the stored checksum matches the current state.

pub fn to_bytes(&self) -> Vec<u8>

Serialize this checkpoint to a flat byte buffer.

Layout:

• 4 bytes: version (LE u32)
• 8 bytes: timestamp (LE u64)
• 8 bytes: step (LE u64)
• 8 bytes: sim_time (LE f64 bits)
• 4 bytes: checksum (LE u32)
• 8 bytes: state length (LE u64)
• N bytes: state data

pub fn from_bytes(data: &[u8]) -> Result<Self>

Deserialize a Checkpoint from a byte slice.

Trait Implementations

impl Clone for Checkpoint

fn clone(&self) -> Checkpoint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Checkpoint

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

Formats the value using the given formatter.

impl PartialEq for Checkpoint

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