source: trunk/j/src/org/armedbear/lisp/with-mutex.lisp @ 9266

Last change on this file since 9266 was 7623, checked in by piso, 17 years ago

Initial checkin.

File size: 1.1 KB
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1;;; with-mutex.lisp
2;;;
3;;; Copyright (C) 2004 Peter Graves
4;;; $Id: with-mutex.lisp,v 1.1 2004-09-09 12:42:34 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 #:extensions)
21
22(defmacro with-mutex ((mutex) &body body)
23  (let ((m (gensym)))
24    `(let ((,m ,mutex))
25       (when (get-mutex ,m)
26         (unwind-protect
27          (progn
28            ,@body)
29          (release-mutex ,m))))))
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