Struct MemoryMapping 

pub struct MemoryMapping {
    pub start: u64,
    pub size: u64,
    pub source: SlotPath,
}

One mapped region. The kernel resolves source (a SlotPath to a Cap::Data) at instance start, reads the bytes, and lays them at [start, start + size).

source is a variable-length SlotPath (was a fixed [SlotIdx; MAX_SOURCE_DEPTH] + length), so MemoryMapping is now a variable-length SSZ container with a fully derived codec — no hand-rolled SSZ. The eager depth bound (≤ MAX_SOURCE_DEPTH) is enforced in image_cap at deblob, not in the wire decode.

Fields

start: u64

size: u64

source: SlotPath

Cnode path resolving to the Cap::Data whose bytes back this region.

Implementations

impl MemoryMapping

pub fn path(&self) -> &[Key]

The cnode path steps — the keys to walk to the Cap::Data backing this mapping. Non-empty for a well-formed mapping.

Trait Implementations

impl Archive for MemoryMapping

where u64: Archive, SlotPath: Archive,

const COPY_OPTIMIZATION: CopyOptimization<Self>

An optimization flag that allows the bytes of this type to be copied directly to a writer instead of calling serialize.

type Archived = ArchivedMemoryMapping

The archived representation of this type.

type Resolver = MemoryMappingResolver

The resolver for this type. It must contain all the additional information from serializing needed to make the archived type from the normal type.

fn resolve(&self, resolver: Self::Resolver, out: Place<Self::Archived>)

Creates the archived version of this value at the given position and writes it to the given output.

impl Clone for MemoryMapping

fn clone(&self) -> MemoryMapping

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MemoryMapping

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

Formats the value using the given formatter.

impl Decode for MemoryMapping

fn is_ssz_fixed_len() -> bool

true iff this type is fixed-length.

fn ssz_fixed_len() -> usize

Number of bytes this type occupies in the fixed-length portion of a container encoding. Variable-length types return [BYTES_PER_LENGTH_OFFSET].

fn from_ssz_bytes(bytes: &[u8]) -> Result<Self, DecodeError>

Decode a full instance from bytes, rejecting trailing input.

impl<__D: Fallible + ?Sized> Deserialize<MemoryMapping, __D> for Archived<MemoryMapping>

where u64: Archive, <u64 as Archive>::Archived: Deserialize<u64, __D>, SlotPath: Archive, <SlotPath as Archive>::Archived: Deserialize<SlotPath, __D>,

fn deserialize( &self, deserializer: &mut __D, ) -> Result<MemoryMapping, <__D as Fallible>::Error>

Deserializes using the given deserializer

impl Encode for MemoryMapping

fn is_ssz_fixed_len() -> bool

true iff this type is fixed-length (no variable-length fields).

fn ssz_fixed_len() -> usize

Number of bytes this type occupies in the fixed-length portion of a container encoding. For variable-length types this returns [BYTES_PER_LENGTH_OFFSET] (i.e. the size of the offset slot).

fn ssz_bytes_len(&self) -> usize

Total size of self when serialized.

fn ssz_append(&self, buf: &mut Vec<u8>)

Append the encoding of self to buf.

fn is_basic_type() -> bool

true for “basic” SSZ types (uintN, bool), which pack adjacent elements into shared 32-byte chunks for merkleization. Composite types (containers, lists, structs) return false (the default).

fn as_ssz_bytes(&self) -> Vec<u8>

Serialize into a fresh Vec<u8> allocated through the global allocator.

impl HashTreeRoot for MemoryMapping

fn hash_tree_root<__D: Digest<OutputSize = U32>>(&self) -> [u8; 32]

Compute the hash tree root using D as the underlying hash.

impl PartialEq for MemoryMapping

fn eq(&self, other: &MemoryMapping) -> 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<__S: Fallible + ?Sized> Serialize<__S> for MemoryMapping

where u64: Serialize<__S>, SlotPath: Serialize<__S>,

fn serialize( &self, serializer: &mut __S, ) -> Result<<Self as Archive>::Resolver, <__S as Fallible>::Error>

Writes the dependencies for the object and returns a resolver that can create the archived type.

impl Eq for MemoryMapping

impl StructuralPartialEq for MemoryMapping