Struct wasmtime_runtime::Mmap

pub struct Mmap { /* private fields */ }

A simple struct consisting of a page-aligned pointer to page-aligned and initially-zeroed memory and a length.

Implementations

impl Mmap

pub fn new() -> Self

Construct a new empty instance of Mmap.

pub fn with_at_least(size: usize) -> Result<Self, String>

Create a new Mmap pointing to at least size bytes of page-aligned accessible memory.

pub fn accessible_reserved(
    accessible_size: usize,
    mapping_size: usize
) -> Result<Self, String>

Create a new Mmap pointing to accessible_size bytes of page-aligned accessible memory, within a reserved mapping of mapping_size bytes. accessible_size and mapping_size must be native page-size multiples.

pub fn make_accessible(
    &mut self,
    start: usize,
    len: usize
) -> Result<(), String>

Make the memory starting at start and extending for len bytes accessible. start and len must be native page-size multiples and describe a range within self’s reserved memory.

pub fn as_slice(&self) -> &[u8]

Return the allocated memory as a slice of u8.

pub fn as_mut_slice(&mut self) -> &mut [u8]

Return the allocated memory as a mutable slice of u8.

pub fn as_ptr(&self) -> *const u8

Return the allocated memory as a pointer to u8.

pub fn as_mut_ptr(&mut self) -> *mut u8

Return the allocated memory as a mutable pointer to u8.

pub fn len(&self) -> usize

Return the length of the allocated memory.

pub fn is_empty(&self) -> bool

Return whether any memory has been allocated.

Trait Implementations

impl Debug for Mmap

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

Formats the value using the given formatter.

impl Drop for Mmap

fn drop(&mut self)

Executes the destructor for this type.