Struct DispatchTable 

pub struct DispatchTable { /* private fields */ }

In-process registry of known kernel names. Populated lazily on first access and shared across all FlashAttnActors.

The “table” is really a HashMap<DispatchKey, &'static str>; the values are static name expressions, never owned. Real cubin compilation is delegated to NvrtcActor via the Phase 0.6 disk cache.

Implementations

impl DispatchTable

pub fn lookup(&self, key: &DispatchKey) -> Result<String, DispatchError>

Resolve a key to a kernel-name expression.

Lookup order:

1. Pre-registered entry (fast path — no allocation).
2. Computed DispatchKey::kernel_name for cells outside the pre-registration cross-product.
3. Err(DispatchError::UnknownKey(_)) if the key is invalid.

pub fn strict_lookup(&self, key: &DispatchKey) -> Result<&str, DispatchError>

Resolve a key, and additionally fail with UnknownKey if it is not in the pre-registered set. Used by tests.

pub fn len(&self) -> usize

Number of pre-registered entries.

pub fn is_empty(&self) -> bool

True iff the table is empty.