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 #ifndef SHARE_GC_G1_G1EDENREGIONS_HPP 26 #define SHARE_GC_G1_G1EDENREGIONS_HPP 27 28 #include "gc/g1/g1RegionsOnNodes.hpp" 29 #include "gc/g1/heapRegion.hpp" 30 #include "runtime/globals.hpp" 31 #include "utilities/debug.hpp" 32 33 class G1EdenRegions { 34 private: 35 int _length; 36 // Sum of used bytes from all retired eden regions. 37 // I.e. updated when mutator regions are retired. 38 volatile size_t _used_bytes; 39 G1RegionsOnNodes _regions_on_node; 40 41 public: 42 G1EdenRegions() : _length(0), _used_bytes(0), _regions_on_node() { } 43 44 virtual uint add(HeapRegion* hr) { 45 assert(!hr->is_eden(), "should not already be set"); 46 _length++; 47 return _regions_on_node.add(hr); 48 } 49 50 void clear() { 51 _length = 0; 52 _used_bytes = 0; 53 _regions_on_node.clear(); 54 } 55 56 uint length() const { return _length; } 57 uint regions_on_node(uint node_index) const { return _regions_on_node.count(node_index); } 58 59 size_t used_bytes() const { return _used_bytes; } 60 61 void add_used_bytes(size_t used_bytes) { 62 _used_bytes += used_bytes; 63 } 64 }; 65 66 #endif // SHARE_GC_G1_G1EDENREGIONS_HPP