Struct DeviceState 

pub struct DeviceState {
    pub thermal: ThermalState,
    pub low_power_mode: Option<bool>,
    pub app_state: AppState,
    pub memory: MemoryPressure,
    pub network: NetworkType,
    pub network_expensive: bool,
    pub network_constrained: bool,
    pub battery_level: Option<u32>,
    pub battery_charging: bool,
}

What the host observes about the device; pushed with Telemetry::set_device_state whenever anything changes.

The host owns the OS APIs (thermal, power, memory, battery, network path, lifecycle) — they are not reachable from Rust without a JVM/ObjC bridge — and the core owns what to do with them: emit the change events from SPEC.md, stretch its own cadence and hold uploads so telemetry never competes with the call. CPU is deliberately not measured here (measuring CPU costs CPU): thermal state is the OS’s judgement, and WebRTC’s own qualityLimitationReason (see RtcStatsSample) says when the encoder is CPU-starved.

Fields

thermal: ThermalState

The OS’s thermal state; Unknown when the platform has no source.

low_power_mode: Option<bool>

Low Power Mode / Battery Saver; None when the platform has no source (no change event, no stretch).

app_state: AppState

Whether the app is in front of the user.

memory: MemoryPressure

The OS’s memory pressure.

network: NetworkType

The active network path.

network_expensive: bool

Cellular / personal hotspot (NWPath.isExpensive, metered on Android).

network_constrained: bool

The user asked for less traffic: Low Data Mode (NWPath.isConstrained), Data Saver, navigator.connection.saveData.

battery_level: Option<u32>

Battery charge in percent; None when unknown (desktops, tvOS, monitoring disabled).

battery_charging: bool

Plugged in and charging: a charging battery is never low.

Trait Implementations

impl Clone for DeviceState

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DeviceState

impl Debug for DeviceState

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

Formats the value using the given formatter.

impl Default for DeviceState

fn default() -> Self

Returns the “default value” for a type.

impl Eq for DeviceState

impl PartialEq for DeviceState

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DeviceState