ocaml/stdlib/gc.ml

94 lines
2.9 KiB
OCaml

(***********************************************************************)
(* *)
(* Objective Caml *)
(* *)
(* Damien Doligez, projet Para, INRIA Rocquencourt *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the GNU Library General Public License. *)
(* *)
(***********************************************************************)
(* $Id$ *)
type stat = {
minor_words : float;
promoted_words : float;
major_words : float;
minor_collections : int;
major_collections : int;
heap_words : int;
heap_chunks : int;
live_words : int;
live_blocks : int;
free_words : int;
free_blocks : int;
largest_free : int;
fragments : int;
compactions : int
};;
type control = {
mutable minor_heap_size : int;
mutable major_heap_increment : int;
mutable space_overhead : int;
mutable verbose : int;
mutable max_overhead : int;
mutable stack_limit : int
};;
external stat : unit -> stat = "gc_stat";;
external counters : unit -> (float * float * float) = "gc_counters";;
external get : unit -> control = "gc_get";;
external set : control -> unit = "gc_set";;
external minor : unit -> unit = "gc_minor";;
external major : unit -> unit = "gc_major";;
external full_major : unit -> unit = "gc_full_major";;
external compact : unit -> unit = "gc_compaction";;
open Printf;;
let print_stat c =
let st = stat () in
fprintf c "minor_words: %.0f\n" st.minor_words;
fprintf c "promoted_words: %.0f\n" st.promoted_words;
fprintf c "major_words: %.0f\n" st.major_words;
fprintf c "minor_collections: %d\n" st.minor_collections;
fprintf c "major_collections: %d\n" st.major_collections;
fprintf c "heap_words: %d\n" st.heap_words;
fprintf c "heap_chunks: %d\n" st.heap_chunks;
fprintf c "live_words: %d\n" st.live_words;
fprintf c "live_blocks: %d\n" st.live_blocks;
fprintf c "free_words: %d\n" st.free_words;
fprintf c "free_blocks: %d\n" st.free_blocks;
fprintf c "largest_free: %d\n" st.largest_free;
fprintf c "fragments: %d\n" st.fragments;
fprintf c "compactions: %d\n" st.compactions;
;;
let allocated_bytes () =
let (mi, pro, ma) = counters () in
(mi +. ma -. pro) *. float_of_int (Sys.word_size / 8)
;;
external finalise : ('a -> unit) -> 'a -> unit = "final_register";;
type alarm = {mutable active : bool; f : unit -> unit};;
let rec call_alarm a =
if a.active then begin
finalise call_alarm a;
a.f ();
end;
;;
let create_alarm f =
let a = { active = true; f = f } in
finalise call_alarm a;
a
;;
let delete_alarm a = a.active <- false;;