fix(lsp): use a dedicated thread for the parent process checker (deno…

…land#21869)

Ensures the Deno process is brought down even when the runtime gets hung
up on something.

Marvin found that the lsp was running without a parent vscode around so
this is maybe/probably related.

cli/lsp/parent_process_checker.rs

@@ -1,20 +1,17 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 
-use deno_core::unsync::spawn;
-use tokio::time::sleep;
-use tokio::time::Duration;
+use std::time::Duration;
 
-/// Starts a task that will check for the existence of the
+/// Starts a thread that will check for the existence of the
 /// provided process id. Once that process no longer exists
 /// it will terminate the current process.
 pub fn start(parent_process_id: u32) {
- spawn(async move {
-   loop {
-  sleep(Duration::from_secs(30)).await;
+ // use a separate thread in case the runtime gets hung up
+ std::thread::spawn(move || loop {
+ std::thread::sleep(Duration::from_secs(10));
 
- if !is_process_active(parent_process_id) {
- std::process::exit(1);
- }
+ if !is_process_active(parent_process_id) {
+ std::process::exit(1);
  }
  });
 }