1 /*

     2  * Copyright (c) 2015, 2016, 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/heapRegion.hpp"

    27 #include "gc/g1/youngList.hpp"

    28 #include "utilities/growableArray.hpp"

    29 #include "utilities/debug.hpp"

    30 

    31 G1SurvivorRegions::G1SurvivorRegions() : _regions(new (ResourceObj::C_HEAP, mtGC) GrowableArray<HeapRegion*>(8, true, mtGC)) {}

    32 

    33 void G1SurvivorRegions::add(HeapRegion* hr) {

    34   assert(hr->is_survivor(), "should be flagged as survivor region");

    35   _regions->append(hr);

    36 }

    37 

    38 uint G1SurvivorRegions::length() const {

    39   return (uint)_regions->length();

    40 }

    41 

    42 void G1SurvivorRegions::convert_to_eden() {

    43   for (GrowableArrayIterator<HeapRegion*> it = _regions->begin();

    44        it != _regions->end();

    45        ++it) {

    46     HeapRegion* hr = *it;

    47     hr->set_eden_pre_gc();

    48   }

    49   clear();

    50 }

    51 

    52 void G1SurvivorRegions::clear() {

    53   _regions->clear();

    54 }

    55 

    56 void G1EdenRegions::add(HeapRegion* hr) {

    57   assert(!hr->is_eden(), "should not already be set");

    58   _length++;

    59 }