Struct wasmedge_sys::instance::table::Table

pub struct Table { /* private fields */ }

A WasmEdge Table defines a WebAssembly table instance described by its type. A table is an array-like structure and stores function references.

This example shows how to use Table to store and retrieve function references.

Implementations

impl Table

pub fn create(ty: &TableType) -> WasmEdgeResult<Self>

Creates a new Table to be associated with the given element type and the size.

Arguments

• ty specifies the type of the new Table.

Error

• If fail to create the table instance, then WasmEdgeError::Table(TableError::Create)(crate::error::TableError) is returned.

Example

use wasmedge_sys::{TableType, Table};
use wasmedge_types::RefType;

// create a TableType instance
let ty = TableType::create(RefType::FuncRef, 10, Some(20)).expect("fail to create a TableType");

// create a Table instance
let table = Table::create(&ty).expect("fail to create a Table");

pub fn ty(&self) -> WasmEdgeResult<TableType>

Returns the TableType of the Table.

Error

If fail to get type, then an error is returned.

pub fn get_data(&self, idx: u32) -> WasmEdgeResult<WasmValue>

Returns the element value at a specific position in the Table.

Arguments

• idx specifies the position in the Table, at which the WasmValue is returned.

Error

If fail to get the data, then an error is returned.

pub fn set_data(&mut self, data: WasmValue, idx: u32) -> WasmEdgeResult<()>

Sets a new element value at a specific position in the Table.

Arguments

• data specifies the new data.

• idx specifies the position of the new data to be stored in the Table.

Error

If fail to set data, then an error is returned.

pub fn capacity(&self) -> usize

Returns the capacity of the Table.

Example

use wasmedge_sys::{TableType, Table};
use wasmedge_types::RefType;

// create a TableType instance and a Table
let ty = TableType::create(RefType::FuncRef, 10, Some(20)).expect("fail to create a TableType");
let table = Table::create(&ty).expect("fail to create a Table");

// check capacity
assert_eq!(table.capacity(), 10);

pub fn grow(&mut self, size: u32) -> WasmEdgeResult<()>

Increases the capacity of the Table.

After growing, the new capacity must be in the range defined by limit when the table is created.

Argument

• size specifies the size to be added to the Table.

Error

If fail to increase the size of the Table, then an error is returned.

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

Available on crate feature ffi only.

Provides a raw pointer to the inner table context.

Trait Implementations

impl Clone for Table

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Table

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

Formats the value using the given formatter.

impl Drop for Table

fn drop(&mut self)

Executes the destructor for this type.