8b8b355bd3
Co-authored-by: Pietro Abate <pietro.abate@tezcore.com> Co-authored-by: Raphaël Proust <code@bnwr.net>
58 lines
2.7 KiB
OCaml
58 lines
2.7 KiB
OCaml
(*****************************************************************************)
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(* *)
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(* Open Source License *)
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(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
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(* *)
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(* Permission is hereby granted, free of charge, to any person obtaining a *)
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(* copy of this software and associated documentation files (the "Software"),*)
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(* to deal in the Software without restriction, including without limitation *)
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(* the rights to use, copy, modify, merge, publish, distribute, sublicense, *)
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(* and/or sell copies of the Software, and to permit persons to whom the *)
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(* Software is furnished to do so, subject to the following conditions: *)
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(* *)
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(* The above copyright notice and this permission notice shall be included *)
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(* in all copies or substantial portions of the Software. *)
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(* *)
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(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
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(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *)
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(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *)
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(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
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(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *)
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(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *)
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(* DEALINGS IN THE SOFTWARE. *)
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(* *)
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(*****************************************************************************)
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module type S = sig
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type k
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type v
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val register: k -> v -> unit
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val alter: k -> (v -> v) -> unit
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val remove: k -> unit
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val query: k -> v option
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val iter_p: (k -> v -> unit Lwt.t) -> unit Lwt.t
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val fold: (k -> v -> 'a -> 'a) -> 'a -> 'a
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end
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module Make (M: sig type v include Map.OrderedType end) : S
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with type k = M.t
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and type v = M.v =
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struct
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module Reg = Map.Make(M)
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type v = M.v
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type k = Reg.key
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let registry: v Reg.t ref = ref Reg.empty
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let register k v = registry := Reg.add k v !registry
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let alter k f =
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match Reg.find_opt k !registry with
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| None -> ()
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| Some v -> registry := Reg.add k (f v) !registry
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let remove k = registry := Reg.remove k !registry
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let query k = Reg.find_opt k !registry
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let iter_p f = Lwt.join (Reg.fold (fun k v acc -> (f k v) :: acc) !registry [])
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let fold f a = Reg.fold f !registry a
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end
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