--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/core/runtime/jobs/LockListener.d	Tue Aug 12 02:34:21 2008 +0200
@@ -0,0 +1,73 @@
+/*******************************************************************************
+ * Copyright (c) 2004, 2006 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM - Initial API and implementation
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.core.runtime.jobs.LockListener;
+
+import tango.core.Thread;
+import dwt.dwthelper.utils;
+
+import dwtx.core.internal.jobs.JobManager;
+import dwtx.core.internal.jobs.LockManager;
+import dwtx.core.runtime.jobs.Job;
+
+/**
+ * A lock listener is notified whenever a thread is about to wait
+ * on a lock, and when a thread is about to release a lock.
+ * <p>
+ * This class is for internal use by the platform-related plug-ins.
+ * Clients outside of the base platform should not reference or subclass this class.
+ * </p>
+ *
+ * @see IJobManager#setLockListener(LockListener)
+ * @since 3.0
+ */
+public class LockListener {
+    private const LockManager manager;
+
+    public this(){
+        manager = (cast(JobManager)Job.getJobManager()).getLockManager();
+    }
+
+    /**
+     * Notification that a thread is about to block on an attempt to acquire a lock.
+     * Returns whether the thread should be granted immediate access to the lock.
+     * <p>
+     * This default implementation always returns <code>false</code>.
+     * Subclasses may override.
+     *
+     * @param lockOwner the thread that currently owns the lock this thread is
+     * waiting for, or <code>null</code> if unknown.
+     * @return <code>true</code> if the thread should be granted immediate access,
+     * and <code>false</code> if it should wait for the lock to be available
+     */
+    public bool aboutToWait(Thread lockOwner) {
+        return false;
+    }
+
+    /**
+     * Notification that a thread is about to release a lock.
+     * <p>
+     * This default implementation does nothing. Subclasses may override.
+     */
+    public void aboutToRelease() {
+        //do nothing
+    }
+
+    /**
+     * Returns whether this thread currently owns any locks
+     * @return <code>true</code> if this thread owns any locks, and
+     * <code>false</code> otherwise.
+     */
+    protected final bool isLockOwnerThread() {
+        return manager.isLockOwner();
+    }
+}