Struct DevicePolicy 

pub struct DevicePolicy { /* private fields */ }

Which backends a process may use — intersected with compile-time features and runtime availability.

Implementations

impl DevicePolicy

pub fn all() -> Self

Allow every compiled-in backend (default).

pub fn only(devices: impl IntoIterator<Item = Device>) -> Self

Restrict to an explicit backend set the developer ships.

pub fn with_deny(self, devices: impl IntoIterator<Item = Device>) -> Self

Exclude specific backends from consideration.

pub fn with_prefer(self, devices: impl IntoIterator<Item = Device>) -> Self

Prefer these backends when cost models tie or are unavailable.

pub fn with_benchmark_pick(self, runs: usize) -> Self

Pick the fastest backend via a one-time micro-benchmark (needs inputs at resolve time).

pub fn pick_strategy(&self) -> DevicePickStrategy

pub fn from_env() -> Self

Read policy from process env (see Self::from_env_key).

pub fn from_env_key(prefix: &str) -> Self

Read PREFIX_DEVICES, PREFIX_DENY_DEVICES, PREFIX_PREFER_DEVICES.

pub fn probe_set(&self) -> Vec<Device>

Devices to show in reports when no allow-list is set.

pub fn apply(&self, candidates: Vec<Device>) -> Vec<Device>

Filter and order candidates according to this policy.

Trait Implementations

impl Clone for DevicePolicy

fn clone(&self) -> DevicePolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DevicePolicy

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

Formats the value using the given formatter.

impl Default for DevicePolicy

fn default() -> DevicePolicy

Returns the “default value” for a type.

impl Eq for DevicePolicy

impl PartialEq for DevicePolicy

fn eq(&self, other: &DevicePolicy) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for DevicePolicy