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/**
* \file wasmtime/table.h
*
* Wasmtime APIs for interacting with WebAssembly tables.
*/
#ifndef WASMTIME_TABLE_H
#define WASMTIME_TABLE_H
#include <wasm.h>
#include <wasmtime/error.h>
#include <wasmtime/extern.h>
#include <wasmtime/store.h>
#include <wasmtime/val.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief Creates a new host-defined wasm table.
*
* \param store the store to create the table within
* \param ty the type of the table to create
* \param init the initial value for this table's elements
* \param 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.
*/
WASM_API_EXTERN wasmtime_error_t *wasmtime_table_new(wasmtime_context_t *store,
const wasm_tabletype_t *ty,
const wasmtime_val_t *init,
wasmtime_table_t *table);
/**
* \brief Returns the type of this table.
*
* The caller has ownership of the returned #wasm_tabletype_t
*/
WASM_API_EXTERN wasm_tabletype_t *
wasmtime_table_type(const wasmtime_context_t *store,
const wasmtime_table_t *table);
/**
* \brief Gets a value in a table.
*
* \param store the store that owns `table`
* \param table the table to access
* \param index the table index to access
* \param 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.
*/
WASM_API_EXTERN bool wasmtime_table_get(wasmtime_context_t *store,
const wasmtime_table_t *table,
uint64_t index, wasmtime_val_t *val);
/**
* \brief Sets a value in a table.
*
* \param store the store that owns `table`
* \param table the table to write to
* \param index the table index to write
* \param 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.
*/
WASM_API_EXTERN wasmtime_error_t *
wasmtime_table_set(wasmtime_context_t *store, const wasmtime_table_t *table,
uint64_t index, const wasmtime_val_t *value);
/**
* \brief Returns the size, in elements, of the specified table
*/
WASM_API_EXTERN uint64_t wasmtime_table_size(const wasmtime_context_t *store,
const wasmtime_table_t *table);
/**
* \brief Grows a table.
*
* \param store the store that owns `table`
* \param table the table to grow
* \param delta the number of elements to grow the table by
* \param init the initial value for new table element slots
* \param 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.
*/
WASM_API_EXTERN 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);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WASMTIME_TABLE_H
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