Struct MemoryLayout 

pub struct MemoryLayout {
    pub slot_count: usize,
    pub arena_bytes: usize,
    pub event_arena_bytes: usize,
}

The fixed layout of the shared linear memory.

Fields

slot_count: usize

Ring capacity in slots (must be a power of two).

arena_bytes: usize

Guest arena capacity in bytes.

event_arena_bytes: usize

Host → guest (event) arena capacity in bytes.

Implementations

impl MemoryLayout

pub fn ring_bytes(&self) -> usize

Ring region byte length.

pub fn event_ring_bytes(&self) -> usize

Event (host → guest) ring region byte length. Reuses slot_count so both rings share the same capacity (power of two).

pub fn total_bytes(&self) -> usize

Total linear memory size: header + ring + event ring + arena + event arena.

pub fn ring_offset(&self) -> usize

Byte offset of the ring region (directly after the header).

pub fn event_ring_offset(&self) -> usize

Byte offset of the host → guest event ring region (after the main ring).

pub fn arena_offset(&self) -> usize

Byte offset of the guest arena region (directly after the event ring).

pub fn event_arena_offset(&self) -> usize

Byte offset of the host → guest (event) arena region (after the guest arena). Owned by the host: it bump-allocates event string payloads here.

pub fn ring_mask(&self) -> usize

Ring mask for wrapping a cursor (slot count is a power of two).

Trait Implementations

impl Clone for MemoryLayout

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MemoryLayout

impl Debug for MemoryLayout

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

Formats the value using the given formatter.

impl Default for MemoryLayout

fn default() -> Self

Returns the “default value” for a type.

impl Eq for MemoryLayout

impl PartialEq for MemoryLayout

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for MemoryLayout