/p>
<p><em>NOTE</em> file locking does have slight differences in behavior across
platforms:</p>
<p>On Linux and OS X this uses advisory locks, which have the
surprising semantics that all locks associated with a given file
are removed when <em>any</em> file descriptor for that file is closed by
the process. Note that this does not actually lock the file for
access. Also note that advisory locks are on a process
level. This means that several isolates in the same process can
obtain an exclusive lock on the 