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comparison src/share/vm/gc_implementation/g1/heapRegionSeq.inline.hpp @ 342:37f87013dfd8

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6711316: Open source the Garbage-First garbage collector Summary: First mercurial integration of the code for the Garbage-First garbage collector. Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
author ysr
date Thu, 05 Jun 2008 15:57:56 -0700
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children c18cbe5936b8
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189:0b27f3512f9e 342:37f87013dfd8
1 /*
2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 inline HeapRegion* HeapRegionSeq::addr_to_region(const void* addr) {
26 assert(_seq_bottom != NULL, "bad _seq_bottom in addr_to_region");
27 if ((char*) addr >= _seq_bottom) {
28 size_t diff = (size_t) pointer_delta((HeapWord*) addr,
29 (HeapWord*) _seq_bottom);
30 int index = (int) (diff >> HeapRegion::LogOfHRGrainWords);
31 assert(index >= 0, "invariant / paranoia");
32 if (index < _regions.length()) {
33 HeapRegion* hr = _regions.at(index);
34 assert(hr->is_in_reserved(addr),
35 "addr_to_region is wrong...");
36 return hr;
37 }
38 }
39 return NULL;
40 }