Struct wasmer_ruby::Wasmer::Global

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pub struct Global;
Expand description

Represents a WebAssembly global instance.

A global instance is the runtime representation of a global variable. It consists of an individual value and a flag indicating whether it is mutable.

Specification: https://webassembly.github.io/spec/core/exec/runtime.html#global-instances

Example

store = Wasmer::Store.new
global = Wasmer::Global.new store, Wasmer::Value.i32(42), false

assert { global.value == 42 }

type = global.type

assert { type.type == Wasmer::Type::I32 }
assert { type.mutable? == false }

Implementations§

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impl Global

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pub fn new(store: Store, value: Value, mutable: Boolean) -> Self

Creates a new Global.

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pub fn mutable(&self) -> Boolean

Returns whether the global is muable.

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pub fn value(&self, value: Any) -> Any

Get or set a new value to the global if mutable.

Example
store = Wasmer::Store.new
global = Wasmer::Global.new store, Wasmer::Value.i32(42), true

assert { global.value == 42 }

type = global.type

assert { type.type == Wasmer::Type::I32 }
assert { type.mutable? == true }

global.value = 153

assert { global.value == 153 }
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pub fn type(&self) -> GlobalType

Returns the global type.

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> ArchivePointee for T

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type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.
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fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pointable for T

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const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Pointee for T

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type Metadata = ()

The type for metadata in pointers and references to Self.
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.