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