Synchronise HEAD with CABAL branch.

src/event.c

@@ -0,0 +1,105 @@
+/*
+    event.c -- event queue
+    Copyright (C) 2002-2003 Guus Sliepen <guus@sliepen.eu.org>,
+                  2002-2003 Ivo Timmermans <ivo@o2w.nl>
+
+    This program 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.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id: event.c,v 1.4 2003/08/24 20:38:24 guus Exp $
+*/
+
+#include "system.h"
+
+#include "avl_tree.h"
+#include "event.h"
+#include "utils.h"
+#include "xalloc.h"
+
+avl_tree_t *event_tree;
+extern time_t now;
+
+int id;
+
+static int event_compare(const event_t *a, const event_t *b)
+{
+	if(a->time > b->time)
+		return 1;
+
+	if(a->time < b->time)
+		return -1;
+
+	return a->id - b->id;
+}
+
+void init_events(void)
+{
+	cp();
+
+	event_tree = avl_alloc_tree((avl_compare_t) event_compare, NULL);
+}
+
+void exit_events(void)
+{
+	cp();
+
+	avl_delete_tree(event_tree);
+}
+
+event_t *new_event(void)
+{
+	cp();
+
+	return (event_t *) xmalloc_and_zero(sizeof(event_t));
+}
+
+void free_event(event_t *event)
+{
+	cp();
+
+	free(event);
+}
+
+void event_add(event_t *event)
+{
+	cp();
+
+	event->id = ++id;
+	avl_insert(event_tree, event);
+}
+
+void event_del(event_t *event)
+{
+	cp();
+
+	avl_delete(event_tree, event);
+}
+
+event_t *get_expired_event(void)
+{
+	event_t *event;
+
+	cp();
+
+	if(event_tree->head) {
+		event = (event_t *) event_tree->head->data;
+
+		if(event->time < now) {
+			avl_delete(event_tree, event);
+			return event;
+		}
+	}
+
+	return NULL;
+}