Sat, 01 Dec 2007 00:00:00 +0000
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duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 2001-2003 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | // This is a shared helper class used during phase 3 and 4 to move all the objects |
duke@435 | 26 | // Dead regions in a Space are linked together to keep track of the live regions |
duke@435 | 27 | // so that the live data can be traversed quickly without having to look at each |
duke@435 | 28 | // object. |
duke@435 | 29 | |
duke@435 | 30 | class LiveRange: public MemRegion { |
duke@435 | 31 | public: |
duke@435 | 32 | LiveRange(HeapWord* bottom, HeapWord* top): MemRegion(bottom, top) {} |
duke@435 | 33 | |
duke@435 | 34 | void set_end(HeapWord* e) { |
duke@435 | 35 | assert(e >= start(), "should be a non-zero range"); |
duke@435 | 36 | MemRegion::set_end(e); |
duke@435 | 37 | } |
duke@435 | 38 | void set_word_size(size_t ws) { |
duke@435 | 39 | assert(ws >= 0, "should be a non-zero range"); |
duke@435 | 40 | MemRegion::set_word_size(ws); |
duke@435 | 41 | } |
duke@435 | 42 | |
duke@435 | 43 | LiveRange * next() { return (LiveRange *) end(); } |
duke@435 | 44 | |
duke@435 | 45 | void move_to(HeapWord* destination) { |
duke@435 | 46 | Copy::aligned_conjoint_words(start(), destination, word_size()); |
duke@435 | 47 | } |
duke@435 | 48 | }; |