[][src]Struct wasmi::GlobalInstance

pub struct GlobalInstance { /* fields omitted */ }

Runtime representation of a global variable (or global for short).

Global contains a value of a specified type and flag which specifies whether this global are mutable or immutable. Neither type of the value nor immutability can't be changed after creation.

Attempt to change value of immutable global or to change type of the value (e.g. assign I32 value to a global that was created with I64 type) will lead to an error.


impl GlobalInstance[src]

pub fn alloc(val: RuntimeValue, mutable: bool) -> GlobalRef[src]

Allocate a global variable instance.

Since it is possible to export only immutable globals, users likely want to set mutable to false.

pub fn set(&self, val: RuntimeValue) -> Result<(), Error>[src]

Change the value of this global variable.


Returns Err if this global isn't mutable or if type of val doesn't match global's type.

pub fn get(&self) -> RuntimeValue[src]

Get the value of this global variable.

pub fn is_mutable(&self) -> bool[src]

Returns if this global variable is mutable.

Note: Imported and/or exported globals are always immutable.

pub fn value_type(&self) -> ValueType[src]

Returns value type of this global variable.

Trait Implementations

impl Debug for GlobalInstance[src]

Auto Trait Implementations

impl !RefUnwindSafe for GlobalInstance

impl Send for GlobalInstance

impl !Sync for GlobalInstance

impl Unpin for GlobalInstance

impl UnwindSafe for GlobalInstance

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized

impl<T> Borrow<T> for T where
    T: ?Sized

impl<T> BorrowMut<T> for T where
    T: ?Sized

impl<T> Downcast for T where
    T: Any

impl<T> DowncastSync for T where
    T: Send + Sync + Any

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.