mirror of
https://github.com/denoland/deno
synced 2024-08-27 12:00:17 +00:00
162 lines
3.6 KiB
Rust
162 lines
3.6 KiB
Rust
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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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use std::sync::Arc;
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use std::sync::Mutex;
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#[derive(Clone, Default)]
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pub struct Progress(Arc<Mutex<Inner>>);
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impl Progress {
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pub fn new() -> Self {
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Progress::default()
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}
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pub fn set_callback<F>(&self, f: F)
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where
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F: Fn(bool, usize, usize, &str) + Send + Sync + 'static,
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{
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let mut s = self.0.lock().unwrap();
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assert!(s.callback.is_none());
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s.callback = Some(Arc::new(f));
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}
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/// Returns job counts: (complete, total)
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pub fn progress(&self) -> (usize, usize) {
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let s = self.0.lock().unwrap();
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s.progress()
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}
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pub fn history(&self) -> Vec<String> {
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let s = self.0.lock().unwrap();
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s.job_names.clone()
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}
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pub fn add(&self, name: String) -> Job {
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let mut s = self.0.lock().unwrap();
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let id = s.job_names.len();
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s.maybe_call_callback(false, s.complete, s.job_names.len() + 1, &name);
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s.job_names.push(name);
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Job {
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id,
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inner: self.0.clone(),
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}
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}
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pub fn done(&self) {
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let s = self.0.lock().unwrap();
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s.maybe_call_callback(true, s.complete, s.job_names.len(), "");
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}
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}
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type Callback = dyn Fn(bool, usize, usize, &str) + Send + Sync;
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#[derive(Default)]
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struct Inner {
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job_names: Vec<String>,
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complete: usize,
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callback: Option<Arc<Callback>>,
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}
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impl Inner {
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pub fn maybe_call_callback(
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&self,
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done: bool,
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complete: usize,
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total: usize,
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msg: &str,
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) {
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if let Some(ref cb) = self.callback {
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cb(done, complete, total, msg);
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}
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}
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/// Returns job counts: (complete, total)
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pub fn progress(&self) -> (usize, usize) {
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let total = self.job_names.len();
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(self.complete, total)
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}
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}
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pub struct Job {
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inner: Arc<Mutex<Inner>>,
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id: usize,
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}
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impl Drop for Job {
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fn drop(&mut self) {
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let mut s = self.inner.lock().unwrap();
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s.complete += 1;
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let name = &s.job_names[self.id];
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let (complete, total) = s.progress();
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s.maybe_call_callback(false, complete, total, name);
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn progress() {
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let p = Progress::new();
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assert_eq!(p.progress(), (0, 0));
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{
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let _j1 = p.add("hello".to_string());
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assert_eq!(p.progress(), (0, 1));
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}
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assert_eq!(p.progress(), (1, 1));
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{
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let _j2 = p.add("hello".to_string());
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assert_eq!(p.progress(), (1, 2));
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}
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assert_eq!(p.progress(), (2, 2));
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}
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#[test]
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fn history() {
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let p = Progress::new();
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let _a = p.add("a".to_string());
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let _b = p.add("b".to_string());
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assert_eq!(p.history(), vec!["a", "b"]);
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}
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#[test]
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fn callback() {
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let callback_history: Arc<Mutex<Vec<(usize, usize, String)>>> =
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Arc::new(Mutex::new(Vec::new()));
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{
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let p = Progress::new();
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let callback_history_ = callback_history.clone();
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p.set_callback(move |_done, complete, total, msg| {
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// println!("callback: {}, {}, {}", complete, total, msg);
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let mut h = callback_history_.lock().unwrap();
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h.push((complete, total, String::from(msg)));
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});
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{
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let _a = p.add("a".to_string());
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let _b = p.add("b".to_string());
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}
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let _c = p.add("c".to_string());
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}
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let h = callback_history.lock().unwrap();
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assert_eq!(
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h.to_vec(),
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vec![
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(0, 1, "a".to_string()),
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(0, 2, "b".to_string()),
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(1, 2, "b".to_string()),
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(2, 2, "a".to_string()),
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(2, 3, "c".to_string()),
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(3, 3, "c".to_string()),
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]
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);
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}
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#[test]
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fn thread_safe() {
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fn f<S: Send + Sync>(_: S) {}
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f(Progress::new());
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}
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}
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