Struct wasmer_ruby::Wasmer::Global

pub struct Global;

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

impl Global

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

Creates a new Global.

pub fn mutable(&self) -> Boolean

Returns whether the global is muable.

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 }

pub fn type(&self) -> GlobalType

Returns the global type.