hotspot/src/share/vm/gc/g1/heapRegionManager.inline.hpp
author david
Mon, 09 Nov 2015 09:19:39 +0100
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8139867: Change how startsHumongous and continuesHumongous regions work in G1. Reviewed-by: tschatzl, tbenson
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/*
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 * Copyright (c) 2001, 2015, 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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#ifndef SHARE_VM_GC_G1_HEAPREGIONMANAGER_INLINE_HPP
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#define SHARE_VM_GC_G1_HEAPREGIONMANAGER_INLINE_HPP
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#include "gc/g1/heapRegion.hpp"
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#include "gc/g1/heapRegionManager.hpp"
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#include "gc/g1/heapRegionSet.inline.hpp"
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inline HeapRegion* HeapRegionManager::addr_to_region(HeapWord* addr) const {
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  assert(addr < heap_end(),
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        "addr: " PTR_FORMAT " end: " PTR_FORMAT, p2i(addr), p2i(heap_end()));
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  assert(addr >= heap_bottom(),
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        "addr: " PTR_FORMAT " bottom: " PTR_FORMAT, p2i(addr), p2i(heap_bottom()));
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  HeapRegion* hr = _regions.get_by_address(addr);
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  return hr;
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}
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inline HeapRegion* HeapRegionManager::at(uint index) const {
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  assert(is_available(index), "pre-condition");
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  HeapRegion* hr = _regions.get_by_index(index);
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  assert(hr != NULL, "sanity");
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  assert(hr->hrm_index() == index, "sanity");
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  return hr;
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}
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inline HeapRegion* HeapRegionManager::next_region_in_humongous(HeapRegion* hr) const {
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  uint index = hr->hrm_index();
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  assert(is_available(index), "pre-condition");
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  assert(hr->is_humongous(), "next_region_in_humongous should only be called for a humongous region.");
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  index++;
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  if (index < max_length() && is_available(index) && at(index)->is_continues_humongous()) {
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    return at(index);
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  } else {
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    return NULL;
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  }
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}
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inline void HeapRegionManager::insert_into_free_list(HeapRegion* hr) {
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  _free_list.add_ordered(hr);
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}
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inline void HeapRegionManager::allocate_free_regions_starting_at(uint first, uint num_regions) {
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  _free_list.remove_starting_at(at(first), num_regions);
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}
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#endif // SHARE_VM_GC_G1_HEAPREGIONMANAGER_INLINE_HPP