Struct TestCache 

pub struct TestCache { /* private fields */ }

Memoized test-commit verdicts, keyed by (plane, property_hash).

Implementations

impl TestCache

pub fn new() -> Self

An empty cache.

pub fn lookup(&self, plane_id: u32, property_hash: u64) -> Option<bool>

The cached verdict, if any.

pub fn record(&mut self, plane_id: u32, property_hash: u64, passed: bool)

Record a verdict, counting failures so scoring can back off.

pub fn failure_count(&self, plane_id: u32, property_hash: u64) -> u32

How many times this combination has been rejected; zero while its latest verdict is a pass.

The score subtracts this. Counting every verdict instead – what this did until drm-cxx#267 – decayed a plane the kernel keeps accepting as fast as one it keeps rejecting, so the search walked away from the plane that worked. Zero after a pass, so a combination rejected while some other state was wrong stops being penalized once it succeeds.

pub fn clear(&mut self)

Drop everything.

Trait Implementations

impl Clone for TestCache

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TestCache

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

Formats the value using the given formatter.

impl Default for TestCache

fn default() -> Self

Returns the “default value” for a type.