Struct CallingFrame

pub struct CallingFrame { /* private fields */ }

Represents a calling frame on top of stack.

Implementations

impl CallingFrame

pub fn memory_ref(&self, idx: u32) -> Option<InnerRef<Memory, &Self>>

Returns an immutable smart pointer borrowing the memory instance by the given index from the module instance of the current calling frame. If the memory instance is not found, returns None.

By default, a WASM module has only one memory instance after instantiation. Therefore, users can pass in 0 as the index to get the memory instance in host function body. When the MultiMemories config option is enabled, there would be more than one memory instances in the wasm module. Users can retrieve the target memory instance by specifying the index of the memory instance in the wasm module instance.

Arguments

• idx - The index of the memory instance.

pub fn memory_mut(&mut self, idx: u32) -> Option<InnerRef<Memory, &mut Self>>

Returns an mutable smart pointer borrowing the memory instance by the given index from the module instance of the current calling frame. If the memory instance is not found, returns None.

By default, a WASM module has only one memory instance after instantiation. Therefore, users can pass in 0 as the index to get the memory instance in host function body. When the MultiMemories config option is enabled, there would be more than one memory instances in the wasm module. Users can retrieve the target memory instance by specifying the index of the memory instance in the wasm module instance.

Arguments

• idx - The index of the memory instance.

Trait Implementations

impl Debug for CallingFrame

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

Formats the value using the given formatter.