+
−;;; post-gc.el --- post-gc actions
+
−
+
−;; Copyright (C) 1985-1986, 1990, 1992-1997 Free Software Foundation, Inc.
+
−;; Copyright (c) 1993, 1994 Sun Microsystems, Inc.
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−;; Copyright (C) 1995 Board of Trustees, University of Illinois
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−
+
−;; Author: Mike Sperber <mike@xemacs.org>
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−;; Maintainer: XEmacs Development Team
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−;; Keywords: internal, dumped
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−
+
−;; This file is part of XEmacs.
+
−
+
−;; XEmacs 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, or (at your option)
+
−;; any later version.
+
−
+
−;; XEmacs 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 XEmacs; see the file COPYING.  If not, write to the 
+
−;; Free Software Foundation, 59 Temple Place - Suite 330,
+
−;; Boston, MA 02111-1307, USA.
+
−
+
−;;; Synched up with: Not in FSF.
+
−
+
−;;; Commentary:
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−
+
−;; This file is dumped with XEmacs.
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−
+
−;; This file defines actions to happen after each GC to perform
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−;; additional cleanup, call finalizers, etc.
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−
+
−(defun run-finalizers (alist)
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−  "Run the finalizers for all objects that have just become unreachable."
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−  (let ((info (assq 'finalize-list alist)))
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−    (if info
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−	(let ((finalize-list (cdr info)))
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−	  (while finalize-list
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−	    (funcall (cdr (car finalize-list)) (car (car finalize-list)))
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−	    (setq finalize-list (cdr finalize-list)))))))
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−
+
−(add-hook 'post-gc-hook 'run-finalizers)
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−
+
−(defvar simple-finalizer-ephemerons '()
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−  "List of ephemerons for objects that have a finalizer attached..")
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−
+
−(defun add-finalizer (object func)
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−  "Add FUNC as a finalizer for object OBJECT."
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−  (setq simple-finalizer-ephemerons
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−	(cons (make-ephemeron object object func)
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−	      simple-finalizer-ephemerons)))
+
−
+
−(defun cleanup-simple-finalizers (alist)
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−  "Clean up `simple-finalizer-ephemerons'."
+
−  ;; We have to do this by hand because DELETE-IF isn't defined yet.
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−  (let ((current simple-finalizer-ephemerons)
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−	(prev nil))
+
−    (while (not (null current))
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−      (if (not (ephemeron-ref (car current)))
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−	  (if (null prev)
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−	      (setq simple-finalizer-ephemerons (cdr current))
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−	    (setcdr prev (cdr current)))
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−	(setq prev current))
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−      (setq current (cdr current)))))
+
−
+
−(add-hook 'post-gc-hook 'cleanup-simple-finalizers)