module Atomic = Opentelemetry_atomic.Atomic

let[@inline] ( let@ ) f x = f x

let debug_ =
  ref
    (match Sys.getenv_opt "OTEL_OCAML_DEBUG" with
    | Some ("1" | "true") -> true
    | _ -> false)

let lock_ : (unit -> unit) ref = ref ignore

let unlock_ : (unit -> unit) ref = ref ignore

let set_mutex ~lock ~unlock : unit =
  lock_ := lock;
  unlock_ := unlock

(* critical section for [f()] *)
let[@inline] with_lock_ f =
  !lock_ ();
  Fun.protect ~finally:!unlock_ f

let[@inline] with_mutex_ m f =
  Mutex.lock m;
  Fun.protect ~finally:(fun () -> Mutex.unlock m) f

let default_url = "http://localhost:4318"

let url =
  ref (try Sys.getenv "OTEL_EXPORTER_OTLP_ENDPOINT" with _ -> default_url)

let get_url () = !url

let set_url s = url := s