Path::Class::File::Lockable uses simple files to indicate
whether a file is locked or not.
It does not use flock(), since that is unstable over NFS.
Effort has been made to avoid race conditions.
Path::Class::File::Lockable is intended for long-standing locks,
as in a Subversion workspace. See SVN::Class for example.
WWW: http://search.cpan.org/dist/Path-Class-File-Lockable/
PR: ports/164368 (based on)
Submitted by: Tatsuya Ueda <ml+freebsd@tatsuya.info>