The zc.lockfile package provides a basic portable
implementation of interprocess locks using lock files. The purpose if not specifically to
lock files, but to simply provide locks with an implementation based on file-locking primitives.
Of course, these locks could be used to mediate access to other files. For example, the ZODB file
storage implementation uses file locks to mediate access to file-storage database files.
The database files and lock file files are separate files.
