audit-concurrency

Your customtkinter UI freezes when background threads directly manipulate widgets instead of returning results to the main thread. Auditing concurrency detects unsafe worker thread widget mutations and verifies proper .after() or queue-based marshaling to keep the interface responsive.

Preventing race conditions requires auditing thread usage to ensure widgets are only manipulated from the main thread. You verify worker targets avoid direct widget mutations and confirm results safely return using .after() or queue-based UI marshaling.

To update customtkinter widgets from a worker thread, use .after() to schedule UI updates on the main thread. Auditing verifies this worker-to-UI communication pattern is correctly implemented and flags missing or incorrect .after() usage when returning from background work.

Yes, this concurrency audit works for Windows customtkinter applications. It specifically prevents undefined behavior on Windows by checking UI callbacks for blocking calls like HTTP requests or time.sleep, ensuring worker results are safely marshaled back to the main thread.

Blocking calls like time.sleep, HTTP requests, and indexing operations triggered directly from customtkinter event handlers cause UI freezes. The audit detects these heavyweight operations in UI callbacks and flags them to prevent the interface from becoming unresponsive.

You should use a queue instead of .after() for thread-safe UI updates when managing complex worker-to-UI communication patterns. The audit verifies both queue-based and .after() marshaling methods to confirm worker results are safely returned to the customtkinter main thread.