hotspot/src/share/vm/gc_implementation/g1/heapRegionSeq.inline.hpp
author ysr
Thu, 05 Jun 2008 15:57:56 -0700
changeset 1374 4c24294029a9
child 5547 f4b087cbb361
permissions -rw-r--r--
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
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/*
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 * Copyright 2001-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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inline HeapRegion* HeapRegionSeq::addr_to_region(const void* addr) {
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  assert(_seq_bottom != NULL, "bad _seq_bottom in addr_to_region");
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  if ((char*) addr >= _seq_bottom) {
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    size_t diff = (size_t) pointer_delta((HeapWord*) addr,
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                                         (HeapWord*) _seq_bottom);
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    int index = (int) (diff >> HeapRegion::LogOfHRGrainWords);
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    assert(index >= 0, "invariant / paranoia");
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    if (index < _regions.length()) {
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      HeapRegion* hr = _regions.at(index);
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      assert(hr->is_in_reserved(addr),
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             "addr_to_region is wrong...");
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      return hr;
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    }
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  }
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  return NULL;
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}