wasmtime::Table Class Reference

A WebAssembly table. More...

#include <wasmtime.hh>

Public Member Functions
	Table (wasmtime_table_t table)
	Creates a new table from the raw underlying C API representation.
TableType	type (Store::Context cx) const
	Returns the type of this table.
uint64_t	size (Store::Context cx) const
	Returns the size, in elements, that the table currently has.
std::optional< Val >	get (Store::Context cx, uint64_t idx) const
Result< std::monostate >	set (Store::Context cx, uint64_t idx, const Val &val) const
Result< uint64_t >	grow (Store::Context cx, uint64_t delta, const Val &init) const

Static Public Member Functions
static Result< Table >	create (Store::Context cx, const TableType &ty, const Val &init)
	Creates a new host-defined table. More...

Detailed Description

A WebAssembly table.

This class represents a WebAssembly table, either created through instantiating a module or a host table. Tables are contiguous vectors of WebAssembly reference types, currently either externref or funcref.

Note that this type does not itself own any resources. It points to resources owned within a Store and the Store must be passed in as the first argument to the functions defined on Table. Note that if the wrong Store is passed in then the process will be aborted.

Examples

externref.cc.

Member Function Documentation

create()

static Result< Table > wasmtime::Table::create ( Store::Context  cx, const TableType &  ty, const Val &  init  )

inlinestatic

Creates a new host-defined table.

Parameters

cx	the store in which to create the table.
ty	the type of the table to be created
init	the initial value for all table slots.

Returns an error if init has the wrong value for the ty specified.

get()

std::optional< Val > wasmtime::Table::get ( Store::Context  cx, uint64_t  idx  ) const

inline

Loads a value from the specified index in this table.

Returns std::nullopt if idx is out of bounds.

Examples

externref.cc.

grow()

Result< uint64_t > wasmtime::Table::grow ( Store::Context  cx, uint64_t  delta, const Val &  init  ) const

inline

Grow this table.

Parameters

cx	the store that owns this table.
delta	the number of new elements to be added to this table.
init	the initial value of all new elements in this table.

Returns an error if init has the wrong type for this table. Otherwise returns the previous size of the table before growth.

set()

Result< std::monostate > wasmtime::Table::set ( Store::Context  cx, uint64_t  idx, const Val &  val  ) const

inline

Stores a value into the specified index in this table.

Returns an error if idx is out of bounds or if val has the wrong type.

Examples

externref.cc.

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The documentation for this class was generated from the following file:

• include/wasmtime.hh