Struct MsgDescHot 

#[repr(C, align(64))]
pub struct MsgDescHot {
    pub msg_id: u64,
    pub channel_id: u32,
    pub method_id: u32,
    pub payload_slot: u32,
    pub payload_generation: u32,
    pub payload_offset: u32,
    pub payload_len: u32,
    pub flags: FrameFlags,
    pub credit_grant: u32,
    pub deadline_ns: u64,
    pub inline_payload: [u8; 16],
}

Hot-path message descriptor (64 bytes, one cache line).

This is the primary descriptor used for frame dispatch. Fits in a single cache line for performance.

Fields

msg_id: u64

Unique message ID per session, monotonic.

channel_id: u32

Logical stream (0 = control channel).

method_id: u32

For RPC dispatch, or control verb.

payload_slot: u32

Slot index (u32::MAX = inline).

payload_generation: u32

Generation counter for ABA safety.

payload_offset: u32

Offset within slot.

payload_len: u32

Actual payload length.

flags: FrameFlags

Frame flags (EOS, CANCEL, ERROR, etc.).

credit_grant: u32

Credits being granted to peer.

deadline_ns: u64

Deadline in nanoseconds (monotonic clock). NO_DEADLINE = no deadline.

inline_payload: [u8; 16]

When payload_slot == u32::MAX, payload lives here. No alignment guarantees beyond u8.

Implementations

impl MsgDescHot

pub const fn new() -> Self

Create a new descriptor with default values.

pub const fn has_deadline(&self) -> bool

Returns true if this frame has a deadline set.

pub fn is_expired(&self, now_ns: u64) -> bool

Check if the deadline has passed.

Returns true if the frame has a deadline and it has expired.

pub const fn is_inline(&self) -> bool

Returns true if payload is inline (not in a slot).

pub const fn is_control(&self) -> bool

Returns true if this is a control frame (channel 0).

pub fn inline_payload(&self) -> &[u8]

Get inline payload slice (only valid if is_inline()).

Trait Implementations

impl Clone for MsgDescHot

fn clone(&self) -> MsgDescHot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MsgDescHot

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

Formats the value using the given formatter.

impl Default for MsgDescHot

fn default() -> Self

Returns the “default value” for a type.

impl Copy for MsgDescHot