mirror of https://github.com/encounter/objdiff.git
184 lines
5.0 KiB
Rust
184 lines
5.0 KiB
Rust
use std::{
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sync::{
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atomic::{AtomicUsize, Ordering},
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mpsc::{Receiver, Sender, TryRecvError},
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Arc, RwLock,
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},
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thread::JoinHandle,
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};
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use anyhow::Result;
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use crate::jobs::{check_update::CheckUpdateResult, objdiff::ObjDiffResult, update::UpdateResult};
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pub mod check_update;
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pub mod objdiff;
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pub mod update;
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#[derive(Debug, Eq, PartialEq, Copy, Clone)]
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pub enum Job {
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ObjDiff,
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CheckUpdate,
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Update,
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}
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pub static JOB_ID: AtomicUsize = AtomicUsize::new(0);
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#[derive(Default)]
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pub struct JobQueue {
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pub jobs: Vec<JobState>,
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pub results: Vec<JobResult>,
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}
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impl JobQueue {
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/// Adds a job to the queue.
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#[inline]
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pub fn push(&mut self, state: JobState) { self.jobs.push(state); }
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/// Adds a job to the queue if a job of the given kind is not already running.
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#[inline]
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pub fn push_once(&mut self, job: Job, func: impl FnOnce() -> JobState) {
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if !self.is_running(job) {
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self.push(func());
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}
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}
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/// Returns whether a job of the given kind is running.
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pub fn is_running(&self, kind: Job) -> bool {
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self.jobs.iter().any(|j| j.kind == kind && j.handle.is_some())
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}
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/// Returns whether any job is running.
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#[allow(dead_code)]
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pub fn any_running(&self) -> bool {
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self.jobs.iter().any(|job| {
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if let Some(handle) = &job.handle {
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return !handle.is_finished();
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}
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false
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})
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}
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/// Iterates over all jobs mutably.
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pub fn iter_mut(&mut self) -> impl Iterator<Item = &mut JobState> + '_ { self.jobs.iter_mut() }
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/// Iterates over all finished jobs, returning the job state and the result.
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pub fn iter_finished(
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&mut self,
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) -> impl Iterator<Item = (&mut JobState, std::thread::Result<JobResult>)> + '_ {
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self.jobs.iter_mut().filter_map(|job| {
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if let Some(handle) = &job.handle {
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if !handle.is_finished() {
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return None;
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}
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let result = job.handle.take().unwrap().join();
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return Some((job, result));
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}
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None
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})
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}
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/// Clears all finished jobs.
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pub fn clear_finished(&mut self) {
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self.jobs.retain(|job| {
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!(job.should_remove
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&& job.handle.is_none()
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&& job.context.status.read().unwrap().error.is_none())
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});
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}
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/// Removes a job from the queue given its ID.
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pub fn remove(&mut self, id: usize) { self.jobs.retain(|job| job.id != id); }
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}
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#[derive(Clone)]
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pub struct JobContext {
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pub status: Arc<RwLock<JobStatus>>,
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pub egui: egui::Context,
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}
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pub struct JobState {
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pub id: usize,
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pub kind: Job,
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pub handle: Option<JoinHandle<JobResult>>,
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pub context: JobContext,
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pub cancel: Sender<()>,
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pub should_remove: bool,
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}
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#[derive(Default)]
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pub struct JobStatus {
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pub title: String,
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pub progress_percent: f32,
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pub progress_items: Option<[u32; 2]>,
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pub status: String,
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pub error: Option<anyhow::Error>,
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}
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pub enum JobResult {
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None,
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ObjDiff(Option<Box<ObjDiffResult>>),
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CheckUpdate(Option<Box<CheckUpdateResult>>),
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Update(Box<UpdateResult>),
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}
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fn should_cancel(rx: &Receiver<()>) -> bool {
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match rx.try_recv() {
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Ok(_) | Err(TryRecvError::Disconnected) => true,
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Err(_) => false,
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}
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}
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fn start_job(
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ctx: &egui::Context,
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title: &str,
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kind: Job,
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run: impl FnOnce(JobContext, Receiver<()>) -> Result<JobResult> + Send + 'static,
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) -> JobState {
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let status = Arc::new(RwLock::new(JobStatus {
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title: title.to_string(),
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progress_percent: 0.0,
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progress_items: None,
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status: String::new(),
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error: None,
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}));
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let context = JobContext { status: status.clone(), egui: ctx.clone() };
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let context_inner = JobContext { status: status.clone(), egui: ctx.clone() };
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let (tx, rx) = std::sync::mpsc::channel();
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let handle = std::thread::spawn(move || {
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return match run(context_inner, rx) {
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Ok(state) => state,
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Err(e) => {
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if let Ok(mut w) = status.write() {
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w.error = Some(e);
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}
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JobResult::None
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}
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};
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});
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let id = JOB_ID.fetch_add(1, Ordering::Relaxed);
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log::info!("Started job {}", id);
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JobState { id, kind, handle: Some(handle), context, cancel: tx, should_remove: true }
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}
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fn update_status(
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context: &JobContext,
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str: String,
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count: u32,
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total: u32,
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cancel: &Receiver<()>,
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) -> Result<()> {
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let mut w =
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context.status.write().map_err(|_| anyhow::Error::msg("Failed to lock job status"))?;
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w.progress_items = Some([count, total]);
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w.progress_percent = count as f32 / total as f32;
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if should_cancel(cancel) {
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w.status = "Cancelled".to_string();
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return Err(anyhow::Error::msg("Cancelled"));
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} else {
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w.status = str;
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}
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drop(w);
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context.egui.request_repaint();
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Ok(())
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}
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