Struct fizzy::Instance

pub struct Instance(_);

An instance of a module.

Implementations

impl Instance

pub unsafe fn checked_memory_slice(
    &self,
    offset: u32,
    size: usize
) -> Result<&[u8], Error>

Obtain a read-only slice of underlying memory.

Safety

These slices turn invalid if the memory is resized (i.e. via the WebAssembly memory.grow instruction)

pub unsafe fn checked_memory_slice_mut(
    &mut self,
    offset: u32,
    size: usize
) -> Result<&mut [u8], Error>

Obtain a mutable slice of underlying memory.

Safety

These slices turn invalid if the memory is resized (i.e. via the WebAssembly memory.grow instruction)

pub fn memory_size(&self) -> usize

Returns the current memory size, in bytes.

pub fn memory_get(&self, offset: u32, target: &mut [u8]) -> Result<(), Error>

Copies memory from offset to target, for the length of target.len().

pub fn memory_set(&mut self, offset: u32, source: &[u8]) -> Result<(), Error>

Copies memory from source to offset, for the length of source.len().

pub fn find_exported_function_index(&self, name: &str) -> Option<u32>

Find index of exported function by name.

pub unsafe fn unsafe_execute(
    &mut self,
    func_idx: u32,
    args: &[Value]
) -> ExecutionResult

Unsafe execution of a given function index func_idx with the given values args.

An invalid index, invalid inputs, or invalid depth can cause undefined behaviour.

Safety

This function expects a valid func_idx and appropriate number of args.

pub fn execute(
    &mut self,
    name: &str,
    args: &[TypedValue]
) -> Result<Option<TypedValue>, Error>

Execute a given function of name with the given values args.

An error is returned if the function can not be found, inappropriate number of arguments are passed, or the supplied types are mismatching.

Trait Implementations

impl Drop for Instance

fn drop(&mut self)

Executes the destructor for this type.