Struct ShapeTableHandle 

pub struct ShapeTableHandle { /* private fields */ }

Shareable handle to a shape transition table and its transition log.

The table is the same object that the pre-B5 GLOBAL_SHAPE_TABLE exposed — a Mutex-guarded transition graph. The log records (parent, child) pairs for JIT shape-guard invalidation and is drained by TierManager::check_shape_invalidations.

The interior Mutexs are deliberately simple: table writes are expected to be rare (only when a HashMap gains a new key) and the lock is held briefly.

Implementations

impl ShapeTableHandle

pub fn new() -> Arc<Self>

Build a fresh handle over an empty transition table.

pub fn table(&self) -> &Mutex<ShapeTransitionTable>

Access the inner transition table mutex.

pub fn transition_log(&self) -> &Mutex<Vec<(ShapeId, ShapeId)>>

Access the inner transition-log mutex.

Trait Implementations

impl Default for ShapeTableHandle

fn default() -> Self

Returns the “default value” for a type.