Struct MmapSlotArena 

pub struct MmapSlotArena { /* private fields */ }

SlotArena over the peer’s RDMA-registered mmap region (a raw base ptr). The peer memcpys between an arena slot and the disk swap on spill/fault; the client one-sided-RDMAs into/out of the same slots. The base VA is stable and registered ONCE per rail — this NEVER re-registers (no MR churn).

SAFETY: base must point at a live mapping of at least num_slots * slot_bytes bytes, page-aligned (mmap guarantees this), outliving the arena. (Peer-specific — deliberately NOT lifted into atlas-tier: the lifted crate carries no unsafe raw-pointer arena types.)

Implementations

impl MmapSlotArena

pub unsafe fn new(base: *mut u8, slot_bytes: usize, num_slots: usize) -> Self

Safety

base must be a valid, writable mapping of >= num_slots*slot_bytes bytes that outlives this arena.

Trait Implementations

impl SlotArena for MmapSlotArena

fn slot_bytes(&self) -> usize

fn num_slots(&self) -> usize

fn read_slot(&self, slot: usize, out: &mut [u8]) -> Result<()>

Copy arena slot → out (for spilling a victim to disk). out.len() MUST equal slot_bytes().

fn write_slot(&mut self, slot: usize, bytes: &[u8]) -> Result<()>

Copy bytes → arena slot (for faulting a record back in). bytes.len() MUST equal slot_bytes().

impl Send for MmapSlotArena