table.h File Reference

#include <wasm.h>
#include <wasmtime/error.h>
#include <wasmtime/extern.h>
#include <wasmtime/store.h>
#include <wasmtime/val.h>

Go to the source code of this file.

Functions
wasmtime_error_t *	wasmtime_table_new (wasmtime_context_t *store, const wasm_tabletype_t *ty, const wasmtime_val_t *init, wasmtime_table_t *table)
	Creates a new host-defined wasm table. More...
wasm_tabletype_t *	wasmtime_table_type (const wasmtime_context_t *store, const wasmtime_table_t *table)
	Returns the type of this table. More...
bool	wasmtime_table_get (wasmtime_context_t *store, const wasmtime_table_t *table, uint64_t index, wasmtime_val_t *val)
	Gets a value in a table. More...
wasmtime_error_t *	wasmtime_table_set (wasmtime_context_t *store, const wasmtime_table_t *table, uint64_t index, const wasmtime_val_t *value)
	Sets a value in a table. More...
uint64_t	wasmtime_table_size (const wasmtime_context_t *store, const wasmtime_table_t *table)
	Returns the size, in elements, of the specified table.
wasmtime_error_t *	wasmtime_table_grow (wasmtime_context_t *store, const wasmtime_table_t *table, uint64_t delta, const wasmtime_val_t *init, uint64_t *prev_size)
	Grows a table. More...

Detailed Description

Wasmtime APIs for interacting with WebAssembly tables.

Function Documentation

wasmtime_table_get()

bool wasmtime_table_get	(	wasmtime_context_t *	store,
		const wasmtime_table_t *	table,
		uint64_t	index,
		wasmtime_val_t *	val
	)

Gets a value in a table.

Parameters

store	the store that owns table
table	the table to access
index	the table index to access
val	where to store the table's value

This function will attempt to access a table element. If a nonzero value is returned then val is filled in and is owned by the caller. Otherwise zero is returned because the index is out-of-bounds.

wasmtime_table_grow()

wasmtime_error_t * wasmtime_table_grow	(	wasmtime_context_t *	store,
		const wasmtime_table_t *	table,
		uint64_t	delta,
		const wasmtime_val_t *	init,
		uint64_t *	prev_size
	)

Grows a table.

Parameters

store	the store that owns table
table	the table to grow
delta	the number of elements to grow the table by
init	the initial value for new table element slots
prev_size	where to store the previous size of the table before growth

This function will attempt to grow the table by delta table elements. This can fail if delta would exceed the maximum size of the table or if init is the wrong type for this table. If growth is successful then NULL is returned and prev_size is filled in with the previous size of the table, in elements, before the growth happened.

This function does not take ownership of any of its arguments.

wasmtime_table_new()

wasmtime_error_t * wasmtime_table_new	(	wasmtime_context_t *	store,
		const wasm_tabletype_t *	ty,
		const wasmtime_val_t *	init,
		wasmtime_table_t *	table
	)

Creates a new host-defined wasm table.

Parameters

store	the store to create the table within
ty	the type of the table to create
init	the initial value for this table's elements
table	where to store the returned table

This function does not take ownership of any of its parameters, but yields ownership of returned error. This function may return an error if the init value does not match ty, for example.

wasmtime_table_set()

wasmtime_error_t * wasmtime_table_set	(	wasmtime_context_t *	store,
		const wasmtime_table_t *	table,
		uint64_t	index,
		const wasmtime_val_t *	value
	)

Sets a value in a table.

Parameters

store	the store that owns table
table	the table to write to
index	the table index to write
value	the value to store.

This function will store value into the specified index in the table. This does not take ownership of any argument but yields ownership of the error. This function can fail if value has the wrong type for the table, or if index is out of bounds.

wasmtime_table_type()

wasm_tabletype_t * wasmtime_table_type	(	const wasmtime_context_t *	store,
		const wasmtime_table_t *	table
	)

Returns the type of this table.

The caller has ownership of the returned wasm_tabletype_t