Add join_threads()

[glenn-jocher]

Signed-off-by: Glenn Jocher [email protected]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced daemon thread handling in Ultralytics YOLOv5 by adding a method to join threads at exit.

📊 Key Changes

• Introduced a new function join_threads(verbose=False).
• This function iterates through all running threads and joins daemon threads to the main thread before exiting the program.

🎯 Purpose & Impact

• Purpose: Ensures that all background processes (daemon threads) are properly concluded before the main program exits.
• Impact: Improves the cleanup process of the software, ensuring that there are no hanging threads that could potentially lead to resource leaks or prevent the application from terminating correctly.
• Users may experience a more graceful shutdown of the application with verbose feedback (if enabled) about the threads being joined.