mirror of
https://github.com/servo/servo.git
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66 lines
2.2 KiB
Rust
66 lines
2.2 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use ipc_channel::ipc::IpcSender;
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use serde::Serialize;
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use std::borrow::ToOwned;
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use std::sync::mpsc::Sender;
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use std::thread;
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use std::thread::Builder;
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use thread_state;
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pub fn spawn_named<F>(name: String, f: F)
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where F: FnOnce() + Send + 'static
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{
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let builder = thread::Builder::new().name(name);
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builder.spawn(f).unwrap();
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}
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/// An abstraction over `Sender<T>` and `IpcSender<T>`, for use in
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/// `spawn_named_with_send_on_failure`.
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pub trait SendOnFailure {
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type Value;
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fn send_on_failure(&mut self, value: Self::Value);
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}
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impl<T> SendOnFailure for Sender<T> where T: Send + 'static {
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type Value = T;
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fn send_on_failure(&mut self, value: T) {
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self.send(value).unwrap();
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}
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}
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impl<T> SendOnFailure for IpcSender<T> where T: Send + Serialize + 'static {
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type Value = T;
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fn send_on_failure(&mut self, value: T) {
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self.send(value).unwrap();
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}
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}
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/// Arrange to send a particular message to a channel if the thread fails.
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pub fn spawn_named_with_send_on_failure<F, T, S>(name: String,
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state: thread_state::ThreadState,
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f: F,
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msg: T,
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mut dest: S)
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where F: FnOnce() + Send + 'static,
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T: Send + 'static,
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S: Send + SendOnFailure<Value=T> + 'static {
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let future_handle = thread::Builder::new().name(name.to_owned()).spawn(move || {
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thread_state::initialize(state);
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f()
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}).unwrap();
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let watcher_name = format!("{}Watcher", name);
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Builder::new().name(watcher_name).spawn(move || {
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match future_handle.join() {
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Ok(()) => (),
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Err(..) => {
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debug!("{} failed, notifying constellation", name);
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dest.send_on_failure(msg);
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}
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}
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}).unwrap();
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}
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