1 files changed, 0 insertions, 105 deletions
diff --git a/bundles/org.eclipse.equinox.registry/src/org/eclipse/core/internal/registry/ReadWriteMonitor.java b/bundles/org.eclipse.equinox.registry/src/org/eclipse/core/internal/registry/ReadWriteMonitor.java
deleted file mode 100644
index 6d21bee62..000000000
--- a/bundles/org.eclipse.equinox.registry/src/org/eclipse/core/internal/registry/ReadWriteMonitor.java
+++ /dev/null
@@ -1,105 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2004, 2005 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 Corporation - initial API and implementation
- *******************************************************************************/
-package org.eclipse.core.internal.registry;
-
-/**
- * Monitor ensuring no more than one writer working concurrently.
- * Multiple readers are allowed to perform simultaneously.
- * 
- * This class was borrowed from org.eclipse.jdt.internal.core.search.indexing. 
- */
-public class ReadWriteMonitor {
-
-	/**
-	 * <0 : writing (cannot go beyond -1, i.e one concurrent writer)
-	 * =0 : idle
-	 * >0 : reading (number of concurrent readers)
-	 */
-	private int status = 0;
-
-	private Thread writeLockowner;
-
-	/**
-	 * Concurrent reading is allowed
-	 * Blocking only when already writing.
-	 */
-	public synchronized void enterRead() {
-		if (writeLockowner == Thread.currentThread())
-			return;
-		while (status < 0) {
-			try {
-				wait();
-			} catch (InterruptedException e) {
-				// ignore
-			}
-		}
-		status++;
-	}
-
-	/**
-	 * Only one writer at a time is allowed to perform
-	 * Blocking only when already writing or reading.
-	 */
-	public synchronized void enterWrite() {
-		if (writeLockowner != Thread.currentThread()) {
-			while (status != 0) {
-				try {
-					wait();
-				} catch (InterruptedException e) {
-					// ignore
-				}
-			}
-//			System.out.println(this + "lockowner:" + Thread.currentThread());
-			writeLockowner = Thread.currentThread();
-		}
-		status--;
-	}
-
-	/**
-	 * Only notify waiting writer(s) if last reader
-	 */
-	public synchronized void exitRead() {
-		if (writeLockowner == Thread.currentThread())
-			return;
-		if (--status == 0)
-			notifyAll();
-	}
-
-	/**
-	 * When writing is over, all readers and possible
-	 * writers are granted permission to restart concurrently
-	 */
-	public synchronized void exitWrite() {
-		if (writeLockowner != Thread.currentThread())
-			throw new IllegalStateException("Current owner is " + writeLockowner); //$NON-NLS-1$
-		if (++status == 0) {
-			//			System.out.println(this + "exitWrite:" + Thread.currentThread());
-			writeLockowner = null;
-			notifyAll();
-		}
-	}
-
-	public String toString() {
-		StringBuffer buffer = new StringBuffer();
-		buffer.append(this.hashCode());
-		if (status == 0) {
-			buffer.append("Monitor idle "); //$NON-NLS-1$
-		} else if (status < 0) {
-			buffer.append("Monitor writing "); //$NON-NLS-1$
-		} else if (status > 0) {
-			buffer.append("Monitor reading "); //$NON-NLS-1$
-		}
-		buffer.append("(status = "); //$NON-NLS-1$
-		buffer.append(this.status);
-		buffer.append(")"); //$NON-NLS-1$
-		return buffer.toString();
-	}
-}