1 /*
   2  * Copyright (c) 2015, 2019, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc/g1/g1SurvivorRegions.hpp"
  27 #include "gc/g1/heapRegion.hpp"
  28 #include "utilities/growableArray.hpp"
  29 #include "utilities/debug.hpp"
  30 
  31 G1SurvivorRegions::G1SurvivorRegions() :
  32   _regions(new (ResourceObj::C_HEAP, mtGC) GrowableArray<HeapRegion*>(8, true, mtGC)),
  33   _used_bytes(0),
  34   _regions_on_node() {}
  35 
  36 uint G1SurvivorRegions::add(HeapRegion* hr) {
  37   assert(hr->is_survivor(), "should be flagged as survivor region");
  38   _regions->append(hr);
  39   return _regions_on_node.add(hr);
  40 }
  41 
  42 uint G1SurvivorRegions::length() const {
  43   return (uint)_regions->length();
  44 }
  45 
  46 uint G1SurvivorRegions::regions_on_node(uint node_index) const {
  47   return _regions_on_node.count(node_index);
  48 }
  49 
  50 void G1SurvivorRegions::convert_to_eden() {
  51   for (GrowableArrayIterator<HeapRegion*> it = _regions->begin();
  52        it != _regions->end();
  53        ++it) {
  54     HeapRegion* hr = *it;
  55     hr->set_eden_pre_gc();
  56   }
  57   clear();
  58 }
  59 
  60 void G1SurvivorRegions::clear() {
  61   _regions->clear();
  62   _used_bytes = 0;
  63   _regions_on_node.clear();
  64 }
  65 
  66 void G1SurvivorRegions::add_used_bytes(size_t used_bytes) {
  67   _used_bytes += used_bytes;
  68 }