blob: ae0605cfb7c5668769fc744cfab8b3b857c7bfe4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
(* Remote counters are *global* counters for fresh ids. In the master/slave
* scenario, the slave installs a getter that asks the master for a fresh
* value. In the scenario of a slave that runs after the death of the master
* on some marshalled data, a backup of all counters status should be taken and
* restored to avoid reusing ids.
* Counters cannot be created by threads, they must be created once and forall
* as toplevel module declarations. *)
type 'a getter = unit -> 'a
type 'a installer = ('a getter) -> unit
val new_counter : name:string ->
'a -> incr:('a -> 'a) -> build:('a -> 'b) -> 'b getter * 'b installer
type remote_counters_status
val backup : unit -> remote_counters_status
(* like backup but makes a copy so that further increment does not alter
* the snapshot *)
val snapshot : unit -> remote_counters_status
val restore : remote_counters_status -> unit
|
