Struct MaintenanceHysteresis 

pub struct MaintenanceHysteresis {
    pub post_clean_guard_runs: usize,
    /* private fields */
}

Tracks the hysteresis boundary around chamber-clean and seasoning events.

When a ToolState::ChamberClean signal is received, the engine performs a “Warm Reset”: the accumulated grammar state is cleared so that post-clean transients during seasoning do not trigger false alarms. A configurable guard window (post_clean_guard_runs) suppresses new alarms for the first N wafer runs after clean completion.

Integration Pattern

Call MaintenanceHysteresis::update at the start of every run with the current ProcessContext. If it returns true, flush the grammar accumulator for all features before processing the current run.

Example

use dsfb_semiconductor::process_context::{
    MaintenanceHysteresis, ProcessContext, ToolState,
};

let mut hyst = MaintenanceHysteresis::new(10);
let mut ctx = ProcessContext::default();

ctx.tool_state = ToolState::ChamberClean;
assert!(hyst.update(&ctx), "clean signal must trigger warm reset");
assert!(hyst.is_suppressed(), "guard window should be active");

ctx.tool_state = ToolState::Production;
for _ in 0..10 {
    hyst.update(&ctx);
}
assert!(!hyst.is_suppressed(), "guard window should have elapsed");

Fields

post_clean_guard_runs: usize

Number of production runs after a clean event during which alarms are suppressed to allow the chamber seasoning transient to decay.

Implementations

impl MaintenanceHysteresis

pub fn new(post_clean_guard_runs: usize) -> Self

Create a new tracker with the specified guard window.

Setting post_clean_guard_runs = 0 disables the guard window.

pub fn update(&mut self, ctx: &ProcessContext) -> bool

Update the tracker with the current process context.

Returns true if the grammar engine must perform a Warm Reset (i.e., the current context indicates a clean/maintenance event).

pub fn is_suppressed(&self) -> bool

Returns true while the engine is inside the post-clean suppression window (i.e., alarms should be downgraded to Watch or suppressed).

pub fn runs_since_last_reset(&self) -> usize

Number of production runs elapsed since the last Warm Reset. Returns usize::MAX when no reset has been triggered.

Trait Implementations

impl Clone for MaintenanceHysteresis

fn clone(&self) -> MaintenanceHysteresis

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MaintenanceHysteresis

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

Formats the value using the given formatter.

impl Default for MaintenanceHysteresis

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MaintenanceHysteresis

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for MaintenanceHysteresis

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.