Control.Concurrent.Cache

Documentation

data Cache a

A thread-safe write-once cache. If you need more functionality, (e.g. multiple write, cache clearing) use an MVar instead.

Instances

Typeable1 Cache

Eq (Cache a)

newCache :: IO (Cache a)

Create an empty cache.

fetch :: Cache a -> IO a -> IO a

Fetch the value stored in the cache, or call the supplied fallback and store the result, if the cache is empty.