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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
use std::sync::Arc;
use std::sync::Mutex;
#[derive(Clone, Default)]
pub struct Progress(Arc<Mutex<Inner>>);
impl Progress {
pub fn new() -> Self {
Progress::default()
}
pub fn set_callback<F>(&self, f: F)
where
F: Fn(bool, usize, usize, &str, &str) + Send + Sync + 'static,
{
let mut s = self.0.lock().unwrap();
assert!(s.callback.is_none());
s.callback = Some(Arc::new(f));
}
/// Returns job counts: (complete, total)
pub fn progress(&self) -> (usize, usize) {
let s = self.0.lock().unwrap();
s.progress()
}
pub fn history(&self) -> Vec<String> {
let s = self.0.lock().unwrap();
s.job_names.clone()
}
pub fn add(&self, status: &str, name: &str) -> Job {
let mut s = self.0.lock().unwrap();
let id = s.job_names.len();
s.maybe_call_callback(
false,
s.complete,
s.job_names.len() + 1,
status,
name,
);
s.job_names.push(name.to_string());
Job {
id,
inner: self.0.clone(),
}
}
pub fn done(&self) {
let s = self.0.lock().unwrap();
s.maybe_call_callback(true, s.complete, s.job_names.len(), "", "");
}
}
type Callback = dyn Fn(bool, usize, usize, &str, &str) + Send + Sync;
#[derive(Default)]
struct Inner {
job_names: Vec<String>,
complete: usize,
callback: Option<Arc<Callback>>,
}
impl Inner {
pub fn maybe_call_callback(
&self,
done: bool,
complete: usize,
total: usize,
status: &str,
msg: &str,
) {
if let Some(ref cb) = self.callback {
cb(done, complete, total, status, msg);
}
}
/// Returns job counts: (complete, total)
pub fn progress(&self) -> (usize, usize) {
let total = self.job_names.len();
(self.complete, total)
}
}
pub struct Job {
inner: Arc<Mutex<Inner>>,
id: usize,
}
impl Drop for Job {
fn drop(&mut self) {
let mut s = self.inner.lock().unwrap();
s.complete += 1;
let name = &s.job_names[self.id];
let (complete, total) = s.progress();
s.maybe_call_callback(false, complete, total, "", name);
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn progress() {
let p = Progress::new();
assert_eq!(p.progress(), (0, 0));
{
let _j1 = p.add("status", "hello");
assert_eq!(p.progress(), (0, 1));
}
assert_eq!(p.progress(), (1, 1));
{
let _j2 = p.add("status", "hello");
assert_eq!(p.progress(), (1, 2));
}
assert_eq!(p.progress(), (2, 2));
}
#[test]
fn history() {
let p = Progress::new();
let _a = p.add("status", "a");
let _b = p.add("status", "b");
assert_eq!(p.history(), vec!["a", "b"]);
}
#[test]
fn callback() {
let callback_history: Arc<Mutex<Vec<(usize, usize, String)>>> =
Arc::new(Mutex::new(Vec::new()));
{
let p = Progress::new();
let callback_history_ = callback_history.clone();
p.set_callback(move |_done, complete, total, _status, msg| {
// println!("callback: {}, {}, {}", complete, total, msg);
let mut h = callback_history_.lock().unwrap();
h.push((complete, total, String::from(msg)));
});
{
let _a = p.add("status", "a");
let _b = p.add("status", "b");
}
let _c = p.add("status", "c");
}
let h = callback_history.lock().unwrap();
assert_eq!(
h.to_vec(),
vec![
(0, 1, "a".to_string()),
(0, 2, "b".to_string()),
(1, 2, "b".to_string()),
(2, 2, "a".to_string()),
(2, 3, "c".to_string()),
(3, 3, "c".to_string()),
]
);
}
#[test]
fn thread_safe() {
fn f<S: Send + Sync>(_: S) {}
f(Progress::new());
}
}
|
