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

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
parents
children c18cbe5936b8
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/*
 * Copyright 2001-2007 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 */

inline HeapRegion* HeapRegionSeq::addr_to_region(const void* addr) {
  assert(_seq_bottom != NULL, "bad _seq_bottom in addr_to_region");
  if ((char*) addr >= _seq_bottom) {
    size_t diff = (size_t) pointer_delta((HeapWord*) addr,
                                         (HeapWord*) _seq_bottom);
    int index = (int) (diff >> HeapRegion::LogOfHRGrainWords);
    assert(index >= 0, "invariant / paranoia");
    if (index < _regions.length()) {
      HeapRegion* hr = _regions.at(index);
      assert(hr->is_in_reserved(addr),
             "addr_to_region is wrong...");
      return hr;
    }
  }
  return NULL;
}