;;; Copyright (C) 2025 Free Software Foundation, Inc.
;;;
;;; This library is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU Lesser General Public License as
;;; published by the Free Software Foundation, either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; This library 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
;;; Lesser General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with this program.  If not, see
;;; <http://www.gnu.org/licenses/>.


(define-module (system finalizers)
  #:export (add-finalizer!
            %guardian-finalizer-priority
            %default-finalizer-priority))

(eval-when (expand load eval)
  (load-extension (string-append "libguile-" (effective-version))
                  "scm_init_finalizers_module"))

(define %guardian-finalizer-priority 1)
(define %default-finalizer-priority 0)

(define* (add-finalizer! obj proc
                         #:optional (priority %default-finalizer-priority))
  "Add a finalizer @var{proc} to object @var{obj}, with priority
@var{priority}.  Return the finalizer object."
  (%add-finalizer! obj proc priority))