Struct substrate_wasmtime_runtime::Table

pub struct Table { /* fields omitted */ }

A table instance.

Implementations

impl Table

pub fn new(plan: &TablePlan) -> Self

Create a new table instance with specified minimum and maximum number of elements.

pub fn size(&self) -> u32

Returns the number of allocated elements.

pub fn grow(&self, delta: u32) -> Option<u32>

Grow table by the specified amount of elements.

Returns None if table can't be grown by the specified amount of elements. Returns the previous size of the table if growth is successful.

pub fn get(&self, index: u32) -> Option<VMCallerCheckedAnyfunc>

Get reference to the specified element.

Returns None if the index is out of bounds.

pub fn set(&self, index: u32, func: VMCallerCheckedAnyfunc) -> Result<(), ()>

Set reference to the specified element.

Panics

Panics if index is out of bounds.

pub fn copy(
    dst_table: &Self,
    src_table: &Self,
    dst_index: u32,
    src_index: u32,
    len: u32
) -> Result<(), Trap>

Copy len elements from src_table[src_index..] into dst_table[dst_index..].

Errors

Returns an error if the range is out of bounds of either the source or destination tables.

pub fn vmtable(&self) -> VMTableDefinition

Return a VMTableDefinition for exposing the table to compiled wasm code.

Trait Implementations

impl Debug for Table

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

Formats the value using the given formatter.