| /* |
| * 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; |
| |
| /** |
| * Simple, fair locks with deadlock detection. |
| */ |
| @Uninterruptible public abstract class Lock { |
| |
| /** |
| * Set the name of this lock instance |
| * |
| * @param str The name of the lock (for error output). |
| */ |
| public abstract void setName(String str); |
| |
| |
| /** |
| * Try to acquire a lock and spin-wait until acquired. |
| */ |
| public abstract void acquire(); |
| |
| /** |
| * Perform sanity checks on the lock. For debugging. |
| * |
| * @param w Identifies the code location in the debugging output. |
| */ |
| public abstract void check(int w); |
| |
| /** |
| * Release the lock by incrementing serving counter. |
| */ |
| public abstract void release(); |
| |
| } |