Struct Pv 

pub struct Pv<T: PvScalar> { /* private fields */ }

Typed handle to a PV record. Cheap to clone; all clones share state.

Implementations

impl<T: PvScalar> Pv<T>

pub fn name(&self) -> &str

pub fn units(self, units: impl Into<String>) -> Self

pub fn prec(self, prec: i32) -> Self

pub fn desc(self, desc: impl Into<String>) -> Self

pub fn adel(self, deadband: f64) -> Self

Archive deadband (parsed/exposed via field access; PVA monitors use MDEL).

pub fn mdel(self, deadband: f64) -> Self

Monitor deadband — suppresses monitor posts for changes smaller than this.

pub fn drive_limits(self, low: f64, high: f64) -> Self

pub fn alarm_limits(self, lolo: f64, low: f64, high: f64, hihi: f64) -> Self

pub fn on_put<F>(self, f: F) -> Self

where F: Fn(&Pv<T>, T) -> Result<(), String> + Send + Sync + 'static,

Attach a PUT handler. Err(msg) rejects the PUT on the wire; Ok(()) accepts it. Called with a bound handle to this PV and the typed value.

pub fn scan<F>(self, period: Duration, f: F) -> Self

where F: Fn(&Pv<T>) -> T + Send + Sync + 'static,

Periodically compute and post a new value for this PV.

impl Pv<f64>

pub fn calc<F>(name: impl Into<String>, inputs: &[&Pv<f64>], f: F) -> Self

where F: Fn(&[f64]) -> f64 + Send + Sync + 'static,

A derived (read-only) PV recomputed whenever any input changes.

impl Pv<f64>

pub fn ai(name: impl Into<String>, initial: f64) -> Self

pub fn ao(name: impl Into<String>, initial: f64) -> Self

impl Pv<bool>

pub fn bi(name: impl Into<String>, initial: bool) -> Self

pub fn bo(name: impl Into<String>, initial: bool) -> Self

impl Pv<String>

pub fn string_in(name: impl Into<String>, initial: impl Into<String>) -> Self

pub fn string_out(name: impl Into<String>, initial: impl Into<String>) -> Self

impl Pv<i32>

pub fn longin(name: impl Into<String>, initial: i32) -> Self

longin — 32-bit integer input record (read-only over the wire).

pub fn longout(name: impl Into<String>, initial: i32) -> Self

longout — 32-bit integer output record (writable).

pub fn mbbi(name: impl Into<String>, choices: Vec<String>, initial: i32) -> Self

mbbi — multi-bit binary input (enum, read-only). Value = choice index.

pub fn mbbo(name: impl Into<String>, choices: Vec<String>, initial: i32) -> Self

mbbo — multi-bit binary output (enum, writable). Value = choice index.

impl<T: PvScalar> Pv<T>

pub async fn set(&self, value: T) -> Result<(), PvError>

Write a value through the full posting pipeline (timestamp, alarms, MDEL gating, monitors, links).

pub async fn set_alarm( &self, severity: i32, status: i32, message: &str, ) -> Result<(), PvError>

Explicitly set the record’s alarm severity/status/message, independent of its value. Alarm transitions always post (no MDEL gating, no link evaluation). A no-op re-set (unchanged alarm) is Ok(()).

pub async fn get(&self) -> Result<T, PvError>

Read the current value, typed.

Trait Implementations

impl<T: PvScalar> Clone for Pv<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: PvScalar> From<Pv<T>> for AnyPv

fn from(pv: Pv<T>) -> Self

Converts to this type from the input type.