Struct RingState 

pub struct RingState {
    pub segment_phys: u64,
    pub index: usize,
    pub cycle: bool,
    pub capacity: usize,
}

Producer/consumer cycle state for ring buffers

Fields

segment_phys: u64

Physical base address of the ring segment

index: usize

Current enqueue/dequeue index within the segment

cycle: bool

Current cycle bit (toggled when wrapping via Link TRB)

capacity: usize

Number of TRBs in the segment (excluding Link TRB at end)

Implementations

impl RingState

pub fn new(segment_phys: u64, capacity: usize) -> Self

Create a new ring state

pub fn advance(&mut self)

Advance index, wrapping and toggling cycle if needed

pub fn current_trb_phys(&self) -> u64

Get the physical address of the TRB at the current index

Trait Implementations

impl Clone for RingState

fn clone(&self) -> RingState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RingState

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

Formats the value using the given formatter.

impl PartialEq for RingState

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

impl Eq for RingState

impl StructuralPartialEq for RingState