snapshot Wed, 27 Nov 2002 18:10:57 +0100

[helm.git] / helm / uwobo / src / ocaml / uwobo_common.mli

diff --git a/helm/uwobo/src/ocaml/uwobo_common.mli b/helm/uwobo/src/ocaml/uwobo_common.mli
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+
+(* Copyright (C) 2002, HELM Team.
+ * 
+ * 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://cs.unibo.it/helm/.
+ *)
+
+exception Uwobo_failure of string;;
+
+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
+