Struct wasmedge_sdk::Global

pub struct Global { /* private fields */ }

Defines a WebAssembly global variable, which stores a single value of the given GlobalType and a flag indicating whether it is mutable or not.

Implementations

impl Global

pub fn new(ty: GlobalType, init: Val) -> WasmEdgeResult<Self>

Creates a new wasm Global instance with the given type and initial value.

Arguments

• ty - The type of the Global instance to be created.

• init - The initial value of the Global instance.

Error

• If fail to create the Global instance, then WasmEdgeError::Global(GlobalError::Create)(crate::error::GlobalError) is returned.

pub fn name(&self) -> Option<&str>

Returns the exported name of this Global instance.

Notice that this field is meaningful only if this Global instance is used as an exported instance.

pub fn mod_name(&self) -> Option<&str>

Returns the name of the module instance from which this Global instance exports.

Notice that this field is meaningful only if this Global instance is used as an exported instance.

pub fn ty(&self) -> &GlobalType

Returns a reference to the type of this Global instance.

pub fn get_value(&self) -> Val

Returns the current value of this Global instance.

pub fn set_value(&mut self, val: Val) -> WasmEdgeResult<()>

Sets a new value of this Global instance.

Notice that only global variables of Var type are allowed to perform this function.

Argument

• value - The new value of the Global instance.

Error

If fail to update the value of the global variable, then an error is returned.

Trait Implementations

impl Clone for Global

fn clone(&self) -> Global

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Global

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

Formats the value using the given formatter.