Enum StateEntry 

pub enum StateEntry {
    AtomicSlot(Arc<Atomic<u32>>),
    ReadProbe(Arc<dyn Fn() -> Result<u32, BackendError> + Send + Sync>),
    Trigger {
        last_result: Arc<Atomic<u32>>,
        callback: Arc<dyn Fn(u32) -> Result<u32, BackendError> + Send + Sync>,
    },
}

Entry bound to a 4-byte aligned offset inside a StateBank.

Variants

AtomicSlot(Arc<Atomic<u32>>)

Lock-free atomic 32-bit slot (read-only state slot or writable runtime knob).

ReadProbe(Arc<dyn Fn() -> Result<u32, BackendError> + Send + Sync>)

Synchronous read callback computed on demand during read32.

Trigger

Write-triggered callback that stores its returned 32-bit status code into last_result for immediate readback or subsequent read32/poll32.

Fields

last_result: Arc<Atomic<u32>>

Most recent result returned by callback (initialized to 0).

callback: Arc<dyn Fn(u32) -> Result<u32, BackendError> + Send + Sync>

Bounded callback executed on write32.

Trait Implementations

impl Clone for StateEntry

fn clone(&self) -> StateEntry

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StateEntry

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

Formats the value using the given formatter.