NesCache (nes.NesCache)

Cache

type ('key, 'value) t

Type of a cache binding 'keys to 'values.

val create : ?lifetime:int -> unit -> ('key, 'value) t

Create a cache. The ?lifetime argument allows to specify (in seconds) when bindings from the cache should be invalidated. Entries are _actually_ removed from the cache during normal use or when explicitly calling for a cleanup.

val use : 
  cache:('key, 'value) t ->
  key:'key ->
  ?if_:bool ->
  (unit -> 'value) ->
  'value

Looks up the ~key in the ~cache. If it exists, return its value. Otherwise, call the given function, store its result and return it. The optional argument, ?if_, skips the cache when false (true by default).