Struct SignatureRegistry

pub struct SignatureRegistry { /* private fields */ }

WebAssembly requires that the caller and callee signatures in an indirect call must match. To implement this efficiently, keep a registry of all signatures, shared by all instances, so that call sites can just do an index comparison.

Implementations

impl SignatureRegistry

pub fn new() -> Self

Create a new SignatureRegistry.

pub fn register(&mut self, sig: FunctionTypeRef<'_>) -> VMSharedSignatureIndex

Register a signature and return its unique index.

pub fn lookup(&self, idx: VMSharedSignatureIndex) -> Option<&FunctionType>

Looks up a shared signature index within this registry.

Note that for this operation to be semantically correct the idx must have previously come from a call to register of this same object.

Trait Implementations

impl Debug for SignatureRegistry

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

Formats the value using the given formatter.