001/*
002 *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003 *
004 *  This file is licensed to You under the Eclipse Public License (EPL);
005 *  You may not use this file except in compliance with the License. You
006 *  may obtain a copy of the License at
007 *
008 *      http://www.opensource.org/licenses/eclipse-1.0.php
009 *
010 *  See the COPYRIGHT.txt file distributed with this work for information
011 *  regarding copyright ownership.
012 */
013package org.jikesrvm.mm.mmtk;
014
015import org.vmmagic.pragma.Uninterruptible;
016
017/**
018 * Provides MMTk access to a heavy lock with condition variable.
019 * Functionally similar to Java monitors, but safe in the darker corners of runtime code.
020 */
021@Uninterruptible
022public final class Monitor extends org.mmtk.vm.Monitor {
023
024  private final org.jikesrvm.scheduler.Monitor theLock;
025
026  public Monitor(String name) {
027    this.theLock = new org.jikesrvm.scheduler.Monitor();
028  }
029
030  @Override
031  public void lock() {
032    theLock.lockNoHandshake();
033  }
034
035  @Override
036  public void unlock() {
037    theLock.unlock();
038  }
039
040  @Override
041  public void await() {
042    theLock.waitNoHandshake();
043  }
044
045  @Override
046  public void broadcast() {
047    theLock.broadcast();
048  }
049}