Struct BufferPool 

pub struct BufferPool<const L: usize = 256, const U: usize = 4096> { /* private fields */ }

Two tier buffer pool with small and large slabs.

Implementations

impl<const L: usize, const U: usize> BufferPool<L, U>

pub fn new(base_addr: u64, region_len: usize) -> Result<Self, AllocError>

Create a new buffer pool over a fixed region.

impl BufferPool

pub const fn upper_slot_size() -> usize

Upper slab slot size in bytes.

pub const fn lower_slot_size() -> usize

Lower slab slot size in bytes.

impl<const L: usize, const U: usize> BufferPool<L, U>

pub fn dealloc_addr(&self, addr: u64) -> Result<(), AllocError>

Free a previously allocated block by its start address.

pub fn allocation_len(&self, addr: u64) -> Result<usize, AllocError>

Capacity of a live allocation by its start address.

Trait Implementations

impl<const L: usize, const U: usize> BufferProvider for BufferPool<L, U>

fn max_alloc_len(&self) -> usize

Preferred maximum size of one allocation segment.

fn alloc(&self, len: usize) -> Result<Allocation, AllocError>

Allocate one buffer that can hold at least len bytes.

fn alloc_sg( &self, total_len: usize, ) -> Result<SmallVec<[Allocation; 4]>, AllocError>

Allocate scatter/gather segments for a logical payload of total_len bytes.

fn dealloc(&self, addr: u64) -> Result<(), AllocError>

Free a previously allocated segment by start address.

fn reset(&self)

Reset the pool to initial state.

impl<const L: usize, const U: usize> Clone for BufferPool<L, U>

fn clone(&self) -> BufferPool<L, U>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<const L: usize, const U: usize> Debug for BufferPool<L, U>

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

Formats the value using the given formatter.