1 /* 2 * Copyright (c) 2015, 2018, 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 #ifndef SHARE_GC_Z_ZPAGETABLE_HPP 25 #define SHARE_GC_Z_ZPAGETABLE_HPP 26 27 #include "gc/z/zAddressRangeMap.hpp" 28 #include "gc/z/zGlobals.hpp" 29 #include "gc/z/zPageTableEntry.hpp" 30 #include "memory/allocation.hpp" 31 32 class ZPage; 33 34 class ZPageTable { 35 friend class VMStructs; 36 friend class ZPageTableIterator; 37 38 private: 39 ZAddressRangeMap<ZPageTableEntry, ZPageSizeMinShift> _map; 40 41 ZPageTableEntry get_entry(ZPage* page) const; 42 void put_entry(ZPage* page, ZPageTableEntry entry); 43 44 public: 45 ZPageTable(); 46 47 ZPage* get(uintptr_t addr) const; 48 void insert(ZPage* page); 49 void remove(ZPage* page); 50 51 bool is_relocating(uintptr_t addr) const; 52 void set_relocating(ZPage* page); 53 void clear_relocating(ZPage* page); 54 }; 55 56 class ZPageTableIterator : public StackObj { 57 private: 58 ZAddressRangeMapIterator<ZPageTableEntry, ZPageSizeMinShift> _iter; 59 ZPage* _prev; 60 61 public: 62 ZPageTableIterator(const ZPageTable* pagetable); 63 64 bool next(ZPage** page); 65 }; 66 67 #endif // SHARE_GC_Z_ZPAGETABLE_HPP