defNewGeneration.inline.hpp revision 113
0N/A * Copyright 2001-2006 Sun Microsystems, Inc. All Rights Reserved. 0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 0N/A * published by the Free Software Foundation. 0N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 0N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 0N/A * CA 95054 USA or visit www.sun.com if you need additional information or 0N/A * have any questions. 113N/A// Methods of protected closure types 113N/A // We never expect to see a null reference being processed 113N/A // as a weak reference. 113N/A // Card marking is trickier for weak refs. 113N/A // This oop is a 'next' field which was filled in while we 113N/A // were discovering weak references. While we might not need 113N/A // to take a special action to keep this reference alive, we 113N/A // will need to dirty a card as the field was modified. 113N/A // Alternatively, we could create a method which iterates through 113N/A // each generation, allowing them in turn to examine the modified 113N/A // We could check that p is also in an older generation, but 113N/A // dirty cards in the youngest gen are never scanned, so the 113N/A // extra check probably isn't worthwhile. 113N/A // We never expect to see a null reference being processed 113N/A // as a weak reference. 113N/A // Optimized for Defnew generation if it's the youngest generation: 113N/A // we set a younger_gen card if we have an older->youngest