Struct wasmtime::MemoryType

pub struct MemoryType { /* fields omitted */ }

A descriptor for a WebAssembly memory type.

Memories are described in units of pages (64KB) and represent contiguous chunks of addressable memory.

Implementations

impl MemoryType

pub fn new(minimum: u32, maximum: Option<u32>) -> MemoryType

Creates a new descriptor for a 32-bit WebAssembly memory given the specified limits of the memory.

The minimum and maximum values here are specified in units of WebAssembly pages, which are 64k.

pub fn new64(minimum: u64, maximum: Option<u64>) -> MemoryType

Creates a new descriptor for a 64-bit WebAssembly memory given the specified limits of the memory.

The minimum and maximum values here are specified in units of WebAssembly pages, which are 64k.

Note that 64-bit memories are part of the memory64 proposal for WebAssembly which is not standardized yet.

pub fn is_64(&self) -> bool

Returns whether this is a 64-bit memory or not.

Note that 64-bit memories are part of the memory64 proposal for WebAssembly which is not standardized yet.

pub fn minimum(&self) -> u64

Returns minimum number of WebAssembly pages this memory must have.

Note that the return value, while a u64, will always fit into a u32 for 32-bit memories.

pub fn maximum(&self) -> Option<u64>

Returns the optionally-specified maximum number of pages this memory can have.

If this returns None then the memory is not limited in size.

Note that the return value, while a u64, will always fit into a u32 for 32-bit memories.

Trait Implementations

impl Clone for MemoryType

fn clone(&self) -> MemoryType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MemoryType

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

Formats the value using the given formatter.

impl From<MemoryType> for ExternType

fn from(ty: MemoryType) -> ExternType

Performs the conversion.

impl Hash for MemoryType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl PartialEq<MemoryType> for MemoryType

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Eq for MemoryType

impl StructuralEq for MemoryType

impl StructuralPartialEq for MemoryType