tech.resource

Generic thread-safe and exception-safe non-gc or 'off heap' resource management.

There is some more information on our blog.

;;create the file
(defn new-random-file
  [fname]
  (resource/track (RandomAccessFile. fname) #(.close item)))


;;Use it
(resource/stack-resource-context
  (let [f (new-random-file fname)]
    ...
    ))

;;Similar to with-open, this will close the file regardless
;;of what happens.  The advantage is this can map to anything
;;you can implement the resource protocol with meaning network sockets,
;;JNI pointers, GPU contexts, etc.  It is also possible to have the
;;gc track something if the dispose functionality does not reference
;;the item itself.

(let [f (resource/track (double-array [1 2 3]) #(println "disposed") :gc)]
  ...)
;;Disposed will print when the gc determines the double array is no longer
;;reachable

There are now explicit methods to create either a weak or soft reference. For the differences, see here.

• gc reference documentation and implementation.
• stack documentation and implementation.

Usage

Checkout the stack and gc tests.

Or take a giant leap and check out tvm-clj.

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version. Complements of Tech Ascent, LLC.