File lock library on POSIX systems
file-lock: Simple flock based file locking for CL
There's not much to this. Currently only supported on POSIX systems (so no Windows, though I'll be happy get a PR for that.)
Only supported on SBCL and Lispworks.
On any other CL and OS combination, we revert to a noop lock (i.e. we won't throw an error, so beware).
This uses a polling mechanism. (i.e., it doesn't block on
flock. Instead, it keeps polling
flock in a non-blocking
manner. Otherwise the CL thread would be uninterruptable which isn't a
great developer experience.)
The most common use case is pretty straightforward:
(with-file-lock (:file "...") (do-stuff))
Arnold Noronha firstname.lastname@example.org