Struct GuidPrefix 

pub struct GuidPrefix(pub [u8; 12]);

GuidPrefix: 12-byte prefix of a GUID. Identifies a participant; stays the same for all endpoints of the participant.

Tuple Fields

0: [u8; 12]

Implementations

impl GuidPrefix

pub const WIRE_SIZE: usize = 12

Wire size: 12 bytes.

pub const UNKNOWN: Self

Sentinel “unknown”.

pub fn to_bytes(self) -> [u8; 12]

Bytes unchanged.

pub fn from_bytes(bytes: [u8; 12]) -> Self

Bytes unchanged.

pub fn host_id(self) -> [u8; 4]

ZeroDDS convention (Spec zerodds-zero-copy-1.0 §6 wave 4): the first 4 bytes of the GuidPrefix carry a deterministic host identifier (hash of the gethostname output). Two participants with an identical host-id prefix run on the same machine and can set up a same-host zero-copy path.

The RTPS 2.5 spec §9.3.1.5 allows vendor-specific structuring of the first 8 bytes (vendor-specific); only the comparison semantics of the full 12 bytes is normative.

pub fn is_same_host(self, other: Self) -> bool

Returns true if both participants carry the same host-id prefix. See Self::host_id.

Trait Implementations

impl Clone for GuidPrefix

fn clone(&self) -> GuidPrefix

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for GuidPrefix

impl Debug for GuidPrefix

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

Formats the value using the given formatter.

impl Eq for GuidPrefix

impl Hash for GuidPrefix

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for GuidPrefix

fn cmp(&self, other: &GuidPrefix) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for GuidPrefix

fn eq(&self, other: &GuidPrefix) -> 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 PartialOrd for GuidPrefix

fn partial_cmp(&self, other: &GuidPrefix) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for GuidPrefix