Struct CASContentionSource 

pub struct CASContentionSource { /* private fields */ }

CAS contention entropy source.

Spawns multiple threads that perform atomic compare-and-swap on shared targets spread across cache lines. The arbitration timing between threads competing for the same cache line is physically nondeterministic because:

1. The cache coherence protocol (MOESI on Apple Silicon) arbitrates concurrent exclusive-access requests nondeterministically.
2. The interconnect fabric latency varies with thermal state and traffic.
3. Each thread’s CAS targets are chosen pseudo-randomly, creating unpredictable contention patterns.
4. XOR-combining timings from all threads amplifies the arbitration entropy.

Implementations

impl CASContentionSource

pub fn new(config: CASContentionConfig) -> Self

Trait Implementations

impl Default for CASContentionSource

fn default() -> Self

Returns the “default value” for a type.

impl EntropySource for CASContentionSource

fn info(&self) -> &SourceInfo

Source metadata.

fn is_available(&self) -> bool

Check if this source can operate on the current machine.

fn collect(&self, n_samples: usize) -> Vec<u8>

Collect raw entropy samples. Returns a Vec<u8> of up to n_samples bytes.

fn name(&self) -> &'static str

Convenience: name from info.