/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Eclipse Public License (EPL);
* You may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
package org.mmtk.vm;
import org.vmmagic.pragma.Uninterruptible;
/**
* Provides MMTk access to a heavy lock with condition variable.
* Functionally similar to Java monitors, but safe in the darker corners of runtime code.
*/
@Uninterruptible
public abstract class Monitor {
/**
* Block until the lock is acquired.
*/
public abstract void lock();
/**
* Release the lock.
*/
public abstract void unlock();
/**
* Wait for a broadcast.
*/
public abstract void await();
/**
* Send a broadcast.
*/
public abstract void broadcast();
}