Source file `affinity.ml`

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(*
 * Copyright (c) 2022 Christiano Haesbaert <haesbaert@haesbaert.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *)

external get_ids : unit -> int list = "caml_get_affinity"

external set_ids : int list -> unit = "caml_set_affinity"

let get_cpus () : Cpu.t list =
  let id_list = get_ids () in
  List.filter (fun cpu -> List.mem (Cpu.id cpu) id_list) Topology.t

let set_cpus (cpu_list : Cpu.t list) : unit =
  set_ids (List.map (fun cpu -> Cpu.id cpu) cpu_list)