/usr/lib/ocaml/gc.ml is in ocaml-nox 4.01.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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(* *)
(* OCaml *)
(* *)
(* 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, with *)
(* the special exception on linking described in file ../LICENSE. *)
(* *)
(***********************************************************************)
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;
top_heap_words : int;
stack_size : 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;
mutable allocation_policy : int;
};;
external stat : unit -> stat = "caml_gc_stat";;
external quick_stat : unit -> stat = "caml_gc_quick_stat";;
external counters : unit -> (float * float * float) = "caml_gc_counters";;
external get : unit -> control = "caml_gc_get";;
external set : control -> unit = "caml_gc_set";;
external minor : unit -> unit = "caml_gc_minor";;
external major_slice : int -> int = "caml_gc_major_slice";;
external major : unit -> unit = "caml_gc_major";;
external full_major : unit -> unit = "caml_gc_full_major";;
external compact : unit -> unit = "caml_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 "top_heap_words: %d\n" st.top_heap_words;
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 = "caml_final_register";;
external finalise_release : unit -> unit = "caml_final_release";;
type alarm = bool ref;;
type alarm_rec = {active : alarm; f : unit -> unit};;
let rec call_alarm arec =
if !(arec.active) then begin
finalise call_alarm arec;
arec.f ();
end;
;;
let create_alarm f =
let arec = { active = ref true; f = f } in
finalise call_alarm arec;
arec.active
;;
let delete_alarm a = a := false;;
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