(* Copyright (C) 2000, HELM Team.
 * 
 * This file is part of HELM, an Hypertextual, Electronic
 * Library of Mathematics, developed at the Computer Science
 * Department, University of Bologna, Italy.
 * 
 * HELM is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * HELM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HELM; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 * 
 * For details, see the HELM World-Wide-Web page,
 * http://cs.unibo.it/helm/.
 *)


(** PROFILING *)

let profiling_enabled = true

type profiler = { profile : 'a 'b. ('a -> 'b) -> 'a -> 'b }
let profile =
 if profiling_enabled then
  function s ->
   let total = ref 0.0 in
   let profile f x =
    let before = Unix.gettimeofday () in
    try
     let res = f x in
     let after = Unix.gettimeofday () in
      total := !total +. (after -. before);
      res
    with
     exc ->
      let after = Unix.gettimeofday () in
       total := !total +. (after -. before);
       raise exc
   in
   at_exit
    (fun () ->
      print_endline
       ("!! TOTAL TIME SPENT IN " ^ s ^ ": " ^ string_of_float !total));
   { profile = profile }
 else
  function _ -> { profile = fun f x -> f x }