helpers to emit in *_provider

src/lib/log_provider.ml

@@ -42,6 +42,10 @@ let get_logger ?name ?version ?(attrs : (string * [< Value.t ]) list = [])
 (** A Logger.t that lazily reads the global at emit time *)
 let default_logger : Logger.t = get_logger ()
 
+(** Emit log with current logger *)
+let[@inline] emit (log : Log_record.t) : unit =
+  Emitter.emit (get ()).emit [ log ]
+
 open Log_record
 
 (** Create log record and emit it on [logger] *)

src/lib/meter_provider.ml

@@ -39,6 +39,9 @@ let get_meter ?name ?version ?(attrs : (string * [< Value.t ]) list = [])
     clock = { Clock.now = (fun () -> Clock.now (Clock.Main.get ())) };
   }
 
+(** Emit with current meter *)
+let[@inline] emit (m : Metrics.t) : unit = Emitter.emit (get ()).emit [ m ]
+
 (** A Meter.t that lazily reads the global at emit time *)
 let default_meter : Meter.t = get_meter ()
 

src/lib/sdk.ml

@@ -41,16 +41,15 @@ let[@inline] active () : Aswitch.t =
   | None -> Aswitch.dummy
   | Some exp -> Exporter.active exp
 
-let add_on_tick_callback (f : unit -> unit) : unit =
-  Globals.add_on_tick_callback f
+let add_on_tick_callback : (unit -> unit) -> unit = Globals.add_on_tick_callback
 
-let run_tick_callbacks () : unit = Globals.run_tick_callbacks ()
+let run_tick_callbacks : unit -> unit = Globals.run_tick_callbacks
 
 (** Tick all providers and run all registered callbacks. Call this periodically
     (e.g. every 500ms) to drive metrics collection, GC metrics, and batch
     timeout flushing. This is the single function client libraries should call
     from their ticker. *)
-let tick () : unit = Globals.run_tick_callbacks ()
+let tick : unit -> unit = Globals.run_tick_callbacks
 
 let set ?batch_traces ?batch_metrics ?batch_logs
     ?(batch_timeout = Mtime.Span.(2_000 * ms)) (exp : Exporter.t) : unit =

src/lib/trace_provider.ml

@@ -5,10 +5,14 @@ open struct
   let provider_ : Tracer.t Atomic.t = Atomic.make Tracer.dummy
 end
 
+(** Get current tracer. *)
 let get () : Tracer.t = Atomic.get provider_
 
+(** Set current tracer *)
 let set (t : Tracer.t) : unit = Atomic.set provider_ t
 
+(** Replace current tracer by the dummy one. All spans will be discarded from
+    now on. *)
 let clear () : unit = Atomic.set provider_ Tracer.dummy
 
 (** Get a tracer pre-configured with a fixed set of attributes added to every
@@ -44,7 +48,7 @@ let get_tracer ?name ?version ?(attrs : (string * [< Value.t ]) list = [])
 let default_tracer : Tracer.t = get_tracer ()
 
 (** Emit a span directly via the current global tracer *)
-let emit (span : Span.t) : unit = Emitter.emit default_tracer.emit [ span ]
+let[@inline] emit (span : Span.t) : unit = Emitter.emit (get ()).emit [ span ]
 
 (** Helper to implement {!with_} and similar functions *)
 let with_thunk_and_finally (self : Tracer.t) ?(force_new_trace_id = false)