chore(watch): simplify watch data synchronization #9154
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chris-olszewski
commented
Sep 16, 2024
| let changed_packages_guard = changed_packages.lock().await; | ||
| if !changed_packages_guard.borrow().is_empty() { | ||
| let changed_packages = changed_packages_guard.take(); | ||
| let some_changed_packages = { |
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We only acquire the guard in the block so we ensure we release the lock once we take the changed packages. This lets the event_fut make progress while self.execute_run is pending.
| (!changed_packages_guard.is_empty()) | ||
| .then(|| std::mem::take(changed_packages_guard.deref_mut())) | ||
| }; | ||
| if let Some(changed_packages) = some_changed_packages { | ||
| self.execute_run(changed_packages).await?; |
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changed_packages_guard is still held while run is being executed, this prevents any events from being handled.
NicholasLYang
approved these changes
Sep 17, 2024
1 task
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Description
Basic view of the futures involved with running
watchevents_futtakes events from the package changes watcher and folds them into aChangedPackagesstruct. It then triggers a notify.run_futloops waiting for a notification and then performing a run.SIGINTsThis PR cleans up how packages changes are synchronized between futures:
RefCellasMutexalready implies mutually exclusive access the the underlying resourcerun_futholding onto the changed packages lock for the entirety of it's run. This allows us to switch fromtokio::sync::Mutextostd::sync::Mutex. Which is suggested by thetokio::sync::MutexdocsTesting Instructions
rustc+ 👀 . Quick gut check by runningturbo watchand triggering package changes