source: branches/1.1.x/examples/misc/update-check-enabled.lisp

Last change on this file was 12721, checked in by Mark Evenson, 14 years ago

Examples reorganization: move snippets to misc, adjust local READMEs.

File size: 1.6 KB
Line 
1;;; update-check-enabled.lisp
2;;;
3;;; Copyright (C) 2003-2006 Peter Graves
4;;; $Id: update-check-enabled.lisp,v 1.2 2006-03-03 14:26:59 piso Exp $
5;;;
6;;; This program is free software; you can redistribute it and/or
7;;; modify it under the terms of the GNU General Public License
8;;; as published by the Free Software Foundation; either version 2
9;;; of the License, or (at your option) any later version.
10;;;
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14;;; GNU General Public License for more details.
15;;;
16;;; You should have received a copy of the GNU General Public License
17;;; along with this program; if not, write to the Free Software
18;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19
20(in-package "CL-USER")
21
22;; In minutes.
23(defparameter check-enabled-timeout 5)
24
25;; Don't resolve autoloads in the background thread!
26(sys::resolve 'get-internal-real-time)
27
28(defun update-check-enabled ()
29  (loop
30    (sleep 60) ; 1 minute
31    (let* ((last-event-time (get-last-event-internal-time))
32           (current-time (get-internal-real-time))
33           (timeout (* check-enabled-timeout 60 internal-time-units-per-second))
34           (enable (if (> current-time (+ last-event-time timeout)) nil t)))
35      (unless (eq (get-global-property 'check-enabled) enable)
36        (set-global-property 'check-enabled enable)
37        (log-debug "check-enabled => ~A" (get-global-property 'check-enabled))))))
38
39;; Fire it up.
40(make-thread #'update-check-enabled)
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