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//! General-purpose instrumentation for progress reporting.
//!
//! Note:
//! Most of the methods accept `&mut self` just to be more restrictive (for forward compat)
//! even tho for some of them we can weaken this requirement to shared reference (`&self`).
use crossbeam_channel::Receiver;
use std::fmt;
#[derive(Debug)]
pub enum ProgressStatus<B, P> {
Begin(B),
Progress(P),
End,
}
pub struct Progress<B, P>(Option<crossbeam_channel::Sender<ProgressStatus<B, P>>>);
impl<B, P> Progress<B, P> {
pub fn report(&mut self, payload: P) {
self.report_with(|| payload);
}
pub fn report_with(&mut self, payload: impl FnOnce() -> P) {
self.send_status(|| ProgressStatus::Progress(payload()));
}
fn send_status(&self, status: impl FnOnce() -> ProgressStatus<B, P>) {
if let Some(sender) = &self.0 {
sender.try_send(status()).expect("progress report must not block");
}
}
}
impl<B, P> Drop for Progress<B, P> {
fn drop(&mut self) {
self.send_status(|| ProgressStatus::End);
}
}
pub struct ProgressSource<B, P>(Option<crossbeam_channel::Sender<ProgressStatus<B, P>>>);
impl<B, P> ProgressSource<B, P> {
pub fn real_if(real: bool) -> (Receiver<ProgressStatus<B, P>>, Self) {
if real {
let (sender, receiver) = crossbeam_channel::unbounded();
(receiver, Self(Some(sender)))
} else {
(crossbeam_channel::never(), Self(None))
}
}
pub fn begin(&mut self, payload: B) -> Progress<B, P> {
self.begin_with(|| payload)
}
pub fn begin_with(&mut self, payload: impl FnOnce() -> B) -> Progress<B, P> {
let progress = Progress(self.0.clone());
progress.send_status(|| ProgressStatus::Begin(payload()));
progress
}
}
impl<B, P> Clone for ProgressSource<B, P> {
fn clone(&self) -> Self {
Self(self.0.clone())
}
}
impl<B, P> fmt::Debug for ProgressSource<B, P> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_tuple("ProgressSource").field(&self.0).finish()
}
}
pub type U32ProgressStatus = ProgressStatus<U32ProgressReport, U32ProgressReport>;
#[derive(Debug)]
pub struct U32ProgressReport {
pub processed: u32,
pub total: u32,
}
impl U32ProgressReport {
pub fn percentage(&self) -> f64 {
f64::from(100 * self.processed) / f64::from(self.total)
}
pub fn to_message(&self, prefix: &str, unit: &str) -> String {
format!("{} ({}/{} {})", prefix, self.processed, self.total, unit)
}
}
pub struct U32Progress {
inner: Progress<U32ProgressReport, U32ProgressReport>,
processed: u32,
total: u32,
}
#[derive(Debug, Eq, PartialEq)]
pub struct IsDone(pub bool);
impl U32Progress {
pub fn report(&mut self, new_processed: u32) -> IsDone {
if self.processed < new_processed {
self.processed = new_processed;
self.inner.report(U32ProgressReport { processed: new_processed, total: self.total });
}
IsDone(self.processed >= self.total)
}
}
#[derive(Clone)]
pub struct U32ProgressSource {
inner: ProgressSource<U32ProgressReport, U32ProgressReport>,
}
impl U32ProgressSource {
pub fn real_if(
real: bool,
) -> (Receiver<ProgressStatus<U32ProgressReport, U32ProgressReport>>, Self) {
let (recv, inner) = ProgressSource::real_if(real);
(recv, Self { inner })
}
pub fn begin(&mut self, initial: u32, total: u32) -> U32Progress {
U32Progress {
inner: self.inner.begin(U32ProgressReport { processed: initial, total }),
processed: initial,
total,
}
}
}
|
