Struct DescriptorRing 

pub struct DescriptorRing<D, const N: usize> { /* private fields */ }

Circular descriptor ring with wraparound index.

Implementations

impl<D, const N: usize> DescriptorRing<D, N>

pub const fn new(descriptors: [D; N]) -> Self

Create a new descriptor ring from an existing array.

pub const fn len(&self) -> usize

Number of descriptors in the ring.

pub const fn is_empty(&self) -> bool

Check if the ring is empty (always false for non-zero N).

pub const fn current_index(&self) -> usize

Current index.

pub fn advance(&mut self)

Advance the current index by one, wrapping around.

pub fn advance_by(&mut self, count: usize)

Advance the current index by count, wrapping around.

pub fn reset(&mut self)

Reset the current index to 0.

pub fn current(&self) -> &D

Reference to the current descriptor.

pub fn current_mut(&mut self) -> &mut D

Mutable reference to the current descriptor.

pub fn get(&self, index: usize) -> &D

Reference to the descriptor at index (wraps around).

pub fn get_mut(&mut self, index: usize) -> &mut D

Mutable reference to the descriptor at index (wraps around).

pub fn base_addr(&self) -> *const D

Pointer to the first descriptor (for programming DMA base-address registers).

pub fn iter(&self) -> impl Iterator<Item = &D>

Iterate over all descriptors.

pub fn iter_mut(&mut self) -> impl Iterator<Item = &mut D>

Iterate mutably over all descriptors.