Struct wasmtime_runtime::InstanceHandle

pub struct InstanceHandle { /* fields omitted */ }

A handle holding an Instance of a WebAssembly module.

Implementations

impl InstanceHandle

pub unsafe fn from_vmctx(vmctx: *mut VMContext) -> Self

Create a new InstanceHandle pointing at the instance pointed to by the given VMContext pointer.

Safety

This is unsafe because it doesn’t work on just any VMContext, it must be a VMContext allocated as part of an Instance.

pub fn vmctx(&self) -> &VMContext

Return a reference to the vmctx used by compiled wasm code.

pub fn vmctx_ptr(&self) -> *mut VMContext

Return a raw pointer to the vmctx used by compiled wasm code.

pub fn module(&self) -> &Module

Return a reference to a module.

pub fn lookup_by_declaration(&self, export: &EntityIndex) -> Export

Lookup an export with the given export declaration.

pub fn exports(&self) -> Iter<'_, String, EntityIndex>

Return an iterator over the exports of this instance.

Specifically, it provides access to the key-value pairs, where the keys are export names, and the values are export declarations which can be resolved lookup_by_declaration.

pub fn host_state(&self) -> &dyn Any

Return a reference to the custom state attached to this instance.

pub fn memory_index(&self, memory: &VMMemoryDefinition) -> DefinedMemoryIndex

Return the memory index for the given VMMemoryDefinition in this instance.

pub fn get_defined_memory(&mut self, index: DefinedMemoryIndex) -> *mut Memory

Get a memory defined locally within this module.

pub fn table_index(&self, table: &VMTableDefinition) -> DefinedTableIndex

Return the table index for the given VMTableDefinition in this instance.

pub fn get_defined_table(&mut self, index: DefinedTableIndex) -> *mut Table

Get a table defined locally within this module.

pub fn store(&self) -> *mut dyn Store

Returns the Store pointer that was stored on creation

pub unsafe fn set_store(&mut self, store: *mut dyn Store)

Configure the *mut dyn Store internal pointer after-the-fact.

This is provided for the original Store itself to configure the first self-pointer after the original Box has been initialized.

pub unsafe fn clone(&self) -> InstanceHandle

Returns a clone of this instance.

This is unsafe because the returned handle here is just a cheap clone of the internals, there’s no lifetime tracking around its validity. You’ll need to ensure that the returned handles all go out of scope at the same time.

Trait Implementations

impl Hash for InstanceHandle

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<InstanceHandle> for InstanceHandle

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

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

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

This method tests for !=.

impl Eq for InstanceHandle

impl Send for InstanceHandle

impl StructuralEq for InstanceHandle

impl StructuralPartialEq for InstanceHandle

impl Sync for InstanceHandle