The registry protocol

2 files changed, 29 insertions, 0 deletions

diff --git a/lib/protocols/Registry.ml b/lib/protocols/Registry.ml
new file mode 100644
index 0000000..4e3a44e
--- /dev/null
+++ b/lib/protocols/Registry.ml
@@ -0,0 +1,16 @@
+class type implementation = object
+  method register : string -> Handle.t -> (unit, Concepts.Condition.condition) result
+  method unregister : string -> (unit, Concepts.Condition.condition) result
+end
+
+type Handle.protocol += Registry of implementation
+
+type t = implementation
+
+let make impl = Registry impl
+
+let from handle = Handle.into handle (function Registry impl -> Some impl | _ -> None)
+
+let register i key value = Handle.invoke i (fun o -> o#register key value)
+
+let unregister i key = Handle.invoke i (fun o -> o#unregister key)
diff --git a/lib/protocols/Registry.mli b/lib/protocols/Registry.mli
new file mode 100644
index 0000000..855f8b8
--- /dev/null
+++ b/lib/protocols/Registry.mli
@@ -0,0 +1,13 @@
+type t
+
+class type implementation = object
+  method register : string -> Handle.t -> (unit, Concepts.Condition.condition) result
+  method unregister : string -> (unit, Concepts.Condition.condition) result
+end
+
+val make : implementation -> Handle.protocol
+
+val from : Handle.t -> t Handle.interface option
+
+val register : t Handle.interface -> string -> Handle.t -> (unit, Concepts.Condition.condition) result
+val unregister : t Handle.interface -> string -> (unit, Concepts.Condition.condition) result