Struct DedupCache 

pub struct DedupCache {
    seen: HashMap<String, u64>,
    insertion_order: VecDeque<String>,
}

Phase F.7 host-bridge dedup cache. Bounded FIFO map keyed by "{event_kind}|{label}|{hwnd}" → max version dispatched.

FIFO insertion order is tracked explicitly via insertion_order because std HashMap::keys().next() iteration order is undefined per-rebuild — the previous implementation could evict the just-inserted key (reagent P1 PR #722 round 1).

Reset on launcher restart sentinel (codex P1 PR #722 round 1): when the launcher’s event_version resets to 1, any cached key holding a higher version blocks the v=1 event. Mirror the renderer-side guard’s heuristic — clear the cache when we see a v=1 event AND any cached entry has a version > 0.

Fields

seen: HashMap<String, u64>

insertion_order: VecDeque<String>

Implementations

impl DedupCache

pub fn new() -> Self

pub fn check_and_record( &mut self, key: String, version: u64, cap: usize, ) -> bool

Returns true if the event should be dispatched (strictly newer for its key). Updates the cache as a side-effect when admitted. Bounded at cap; on overflow, evicts the oldest insertion in FIFO order.

pub fn clear(&mut self)

Clear the cache. Called on launcher-restart sentinel.

pub fn has_any_versioned_entry(&self) -> bool

True if any cached entry has a version above 0 — used as the guard for the v=1 restart sentinel.

pub fn len(&self) -> usize

Trait Implementations

impl Default for DedupCache

fn default() -> DedupCache

Returns the “default value” for a type.