-(*
- * Copyright (C) 2003:
- * Stefano Zacchiroli <zack@cs.unibo.it>
- * for the HELM Team http://helm.cs.unibo.it/
- *
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- *
- * HELM 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
- * of the License, or (at your option) any later version.
- *
- * HELM 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 HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * For details, see the HELM World-Wide-Web page,
- * http://helm.cs.unibo.it/
- *)
-
-class threadSafe:
- object
-
- (** execute 'action' in mutual exclusion between all other threads *)
- method private doCritical: 'a lazy_t -> 'a
-
- (** execute 'action' acting as a 'reader' i.e.: multiple readers can act
- at the same time but no writer can act until no readers are acting *)
- method private doReader: 'a lazy_t -> 'a
-
- (** execute 'action' acting as a 'writer' i.e.: when a writer is acting,
- no readers or writer can act, beware that writers can starve *)
- method private doWriter: 'a lazy_t -> 'a
-
- end
-