Working with references

References are instances of the CTKReference class (analogous to Clojure Refs — http://clojure.org/Refs)

Creating a CTKReference

There are 2 ways of creating a reference. One is by invoking one of the initialization methods. In the following example we are creating a reference to a hashMap.

CTKPersistentHashMap *map = [CTKPersistentHashMap emptyHashMap];
CTKReference *ref = [CTKReference referenceWithValue:map];

Alternatively one can create a reference by using the reference convenience method which is added by CTKConcurrency through a category to NSObject.

CTKPersistentHashmap *map = [CTKPersistentHashmap emptyHashMap];
CTKReference *ref = [map reference];