genOopClosures.hpp revision 845
553N/A * Copyright 2001-2008 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. 553N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 553N/A * CA 95054 USA or visit www.sun.com if you need additional information or // Closure for iterating roots from a particular generation // Note: all classes deriving from this MUST call this do_barrier // method at the end of their own do_oop method! // Note: no do_oop defined, this is an abstract class. // Some subtypes need access. // Derived classes that modify oops so that they might be old-to-young // pointers must call the method below. // Version for use by closures that may be called in parallel code. // Problem with static closures: must have _gen_boundary set at some point, // but cannot do this until after the heap is initialized. // Closure for scanning DefNewGeneration. // This closure will perform barrier store calls for ALL // pointers in scanned oops. // Closure for scanning DefNewGeneration. // This closure only performs barrier store calls on // pointers into the DefNewGeneration. This is less // precise, but faster, than a ScanClosure // Closure for scanning DefNewGeneration's weak references. // NOTE: very much like ScanClosure but not derived from // OopsInGenClosure -- weak references are processed all // at once, with no notion of which generation they were in.