1 /* 2 * Copyright (c) 2017, 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_ZADDRESSRANGEMAP_HPP 25 #define SHARE_GC_Z_ZADDRESSRANGEMAP_HPP 26 27 #include "memory/allocation.hpp" 28 29 template<typename T, size_t AddressRangeShift> 30 class ZAddressRangeMapIterator; 31 32 template <typename T, size_t AddressRangeShift> 33 class ZAddressRangeMap { 34 friend class VMStructs; 35 friend class ZAddressRangeMapIterator<T, AddressRangeShift>; 36 37 private: 38 T* const _map; 39 40 size_t index_for_addr(uintptr_t addr) const; 41 size_t size() const; 42 43 public: 44 ZAddressRangeMap(); 45 ~ZAddressRangeMap(); 46 47 T get(uintptr_t addr) const; 48 void put(uintptr_t addr, T value); 49 }; 50 51 template <typename T, size_t AddressRangeShift> 52 class ZAddressRangeMapIterator : public StackObj { 53 public: 54 const ZAddressRangeMap<T, AddressRangeShift>* const _map; 55 size_t _next; 56 57 public: 58 ZAddressRangeMapIterator(const ZAddressRangeMap<T, AddressRangeShift>* map); 59 60 bool next(T* value); 61 }; 62 63 #endif // SHARE_GC_Z_ZADDRESSRANGEMAP_HPP