author | mikael |
Tue, 09 Oct 2012 10:09:34 -0700 | |
changeset 13963 | e5b53c306fb5 |
parent 7397 | 5b173b4ca846 |
child 29580 | a67a581cfe11 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_LIVERANGE_HPP |
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#define SHARE_VM_GC_IMPLEMENTATION_SHARED_LIVERANGE_HPP |
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#include "memory/memRegion.hpp" |
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#include "utilities/copy.hpp" |
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// This is a shared helper class used during phase 3 and 4 to move all the objects |
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// Dead regions in a Space are linked together to keep track of the live regions |
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// so that the live data can be traversed quickly without having to look at each |
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// object. |
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class LiveRange: public MemRegion { |
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public: |
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LiveRange(HeapWord* bottom, HeapWord* top): MemRegion(bottom, top) {} |
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void set_end(HeapWord* e) { |
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assert(e >= start(), "should be a non-zero range"); |
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MemRegion::set_end(e); |
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} |
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void set_word_size(size_t ws) { |
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assert(ws >= 0, "should be a non-zero range"); |
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MemRegion::set_word_size(ws); |
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} |
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LiveRange * next() { return (LiveRange *) end(); } |
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void move_to(HeapWord* destination) { |
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Copy::aligned_conjoint_words(start(), destination, word_size()); |
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} |
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}; |
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#endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_LIVERANGE_HPP |