Struct wasmi::GlobalInstance [−][src]
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.
Methods
impl GlobalInstance
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impl GlobalInstance
pub fn alloc(val: RuntimeValue, mutable: bool) -> GlobalRef
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pub fn alloc(val: RuntimeValue, mutable: bool) -> GlobalRef
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>
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pub fn set(&self, val: RuntimeValue) -> Result<(), Error>
Change the value of this global variable.
Errors
Returns Err
if this global isn't mutable or if
type of val
doesn't match global's type.
pub fn get(&self) -> RuntimeValue
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pub fn get(&self) -> RuntimeValue
Get the value of this global variable.
pub fn is_mutable(&self) -> bool
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pub fn is_mutable(&self) -> bool
Returns if this global variable is mutable.
Note: Imported and/or exported globals are always immutable.
pub fn value_type(&self) -> ValueType
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pub fn value_type(&self) -> ValueType
Returns value type of this global variable.
Trait Implementations
impl Debug for GlobalInstance
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impl Debug for GlobalInstance
Auto Trait Implementations
impl Send for GlobalInstance
impl Send for GlobalInstance
impl !Sync for GlobalInstance
impl !Sync for GlobalInstance