How to know if doxygen is locked?

@muriel.schmidt 

There are a few ways to determine if Doxygen is locked:

1. Check for any error messages or warnings in the Doxygen output log. If there are any messages indicating that a lock or mutex has been acquired and not released, it could be a sign that Doxygen is locked.
2. Look for any processes running in the background that are related to Doxygen. If there are multiple instances of Doxygen running simultaneously or if one instance appears to be stuck or unresponsive, it may be a sign that Doxygen is locked.
3. Try to access the Doxygen configuration files or output directories. If you are unable to access or modify these files, it could indicate that Doxygen is locked.
4. Use system monitoring tools to check for any abnormal CPU or memory usage by the Doxygen process. If the process is using an unusually high amount of resources or appears to be stuck in a loop, it may be a sign that Doxygen is locked.

If you suspect that Doxygen is locked, you may need to terminate the process manually or restart the system to resolve the issue.