1 files changed, 87 insertions, 0 deletions
diff --git a/mcop/referenceclean.cpp b/mcop/referenceclean.cpp
new file mode 100644
index 0000000..04f1125
--- /dev/null
+++ b/mcop/referenceclean.cpp
@@ -0,0 +1,87 @@
+    /*
+
+    Copyright (C) 2000 Stefan Westerfeld
+                       stefan@space.twc.de
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+  
+    This library 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
+    Library General Public License for more details.
+   
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+
+    */
+
+#include "referenceclean.h"
+#include "time.h"
+
+using namespace std;
+using namespace Arts;
+
+ReferenceClean::ReferenceClean(Pool<Object_skel>& objectPool)
+	:objectPool(objectPool)
+{
+	Dispatcher::the()->ioManager()->addTimer(5000, this);
+}
+
+void ReferenceClean::notifyTime()
+{
+	/*
+	 * This last_notify and now check is because IOManager accumulates
+	 * notifyTime() calls, so it may happen that we don't get one for ten
+	 * seconds, and then two. However, this breaks the "second-chance"
+	 * algorithm referenceClean is using, which depends on the fact that
+	 * there is some significant time delay between two calls. So we'll
+	 * verify it by hand.
+	 */
+
+	static time_t last_notify = 0;
+	time_t now;
+
+	time(&now);
+	if(now-last_notify > 4)
+	{
+		clean();
+		last_notify = now;
+	}
+}
+
+void ReferenceClean::forceClean()
+{
+	/*
+	 * as we're giving a second chance on reference clean, we need to
+	 * clean twice to really really clean up 
+	 */
+	clean();
+	clean();
+}
+
+void ReferenceClean::clean()
+{
+ 	/*
+	 * we manually iterate through the pool here, to get around the problem
+	 * that if an object disappears, ten other objects might cease to exist
+	 * as well (as they are dependant), which would break a list which we
+	 * could obtain via enumerate() and would probably lead to a crash
+	 */
+	unsigned long l;
+
+	for(l=0; l<objectPool.max(); l++)
+	{
+		Object_skel *skel = objectPool[l]; 
+		if(skel) skel->_referenceClean();
+	}
+}
+
+ReferenceClean::~ReferenceClean()
+{
+	Dispatcher::the()->ioManager()->removeTimer(this);
+}