CONTENT_ADDRESSABLE_STOREMAKER is the signature exposed by content-addressable store backends. K is the implementation of keys and V is the implementation of values.


module K : Hash.S
module V : Type.S


include CONTENT_ADDRESSABLE_STORE with type key = K.t and type value = V.t
type -'a t

The type for content-addressable backend stores. The 'a phantom type carries information about the store mutability.

type key = K.t

The type for keys.

type value = V.t

The type for raw values.

val mem : [> ] t -> key -> bool Lwt.t

mem t k is true iff k is present in t.

val find : [> ] t -> key -> value option Lwt.t

find t k is Some v if k is associated to v in t and None is k is not present in t.

val add : [> Perms.write ] t -> value -> key Lwt.t

Write the contents of a value to the store. It's the responsibility of the content-addressable store to generate a consistent key.

val unsafe_add : [> Perms.write ] t -> key -> value -> unit Lwt.t

Same as add but allows to specify the key directly. The backend might choose to discared that key and/or can be corrupt if the key scheme is not consistent.

val clear : 'a t -> unit Lwt.t

Clear the store. This operation is expected to be slow.

val batch : t -> ([ | Perms.write ] t -> 'a Lwt.t) -> 'a Lwt.t

batch t f applies the writes in f in a separate batch. The exact guarantees depend on the implementation.

v config is a function returning fresh store handles, with the configuration config, which is provided by the backend.

val close : 'a t -> unit Lwt.t

close t frees up all the resources associated with t. Any operations run on a closed handle will raise Closed.