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     */
013    package org.mmtk.utility.deque;
014    
015    import org.mmtk.utility.Constants;
016    
017    import org.vmmagic.unboxed.*;
018    import org.vmmagic.pragma.*;
019    
020    /**
021     * This supports <i>unsynchronized</i> insertion of write buffer values.
022     */
023    @Uninterruptible public class WriteBuffer extends LocalSSB
024      implements Constants {
025    
026      /****************************************************************************
027       *
028       * Public instance methods
029       */
030    
031      /**
032       * Constructor
033       *
034       * @param queue The shared queue to which this local ssb will append
035       * its buffers (when full or flushed).
036       */
037      public WriteBuffer(SharedDeque queue) {
038        super(queue);
039      }
040    
041      /**
042       * Insert a value to be remembered into the write buffer.
043       *
044       * @param addr the value to be inserted into the write buffer
045       */
046      @NoInline
047      public final void insert(Address addr) {
048        checkTailInsert(1);
049        uncheckedTailInsert(addr);
050      }
051    }