Is os.replace() atomic on Windows?

Question

In the docs it says that replacing files are guaranteed to be atomic on POSIX systems. Does this mean that it's not atomic on Windows?

Answer 1

As visible in this thread the atomic replace functionality for windows has been added for version 3.3.

The patch is visible here.

In the background MoveFileEx with when nessesary the MOVEFILE_REPLACE_EXISTING flag added is called.

MoveFileEx is the same method as the openjdk calls. I can't find any documentation stating it is atomic, but the community seems to rely on it.