Struct InvokerSlot 

pub struct InvokerSlot { /* private fields */ }

A single atomic-pointer slot for one registered host-side function pointer. 0 means “not registered”; the static thunks bail out (returning the kind’s default value) when they see an unregistered slot rather than transmuting 0 into a fn pointer and crashing.

Implementations

impl InvokerSlot

pub const fn new() -> Self

Create an empty slot. const so it can be used to declare static per-kind slots in impl_managed_callback! expansions.

pub fn set(&self, ptr: usize)

Replace the registered function pointer.

SeqCst because the slot is read on every callback fire and we don’t want any stale-pointer windows after the host swaps invokers (rare but legal — e.g. unloading a Lua module that registered).

pub fn get(&self) -> usize

Read the current function pointer; 0 if unregistered.

Trait Implementations

impl Default for InvokerSlot

fn default() -> Self

Returns the “default value” for a type.