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_ZFORWARDING_HPP 25 #define SHARE_GC_Z_ZFORWARDING_HPP 26 27 #include "gc/z/zForwardingTableEntry.hpp" 28 #include "memory/allocation.hpp" 29 30 typedef size_t ZForwardingTableCursor; 31 32 class ZForwardingTable { 33 friend class VMStructs; 34 friend class ZForwardingTableTest; 35 36 private: 37 ZForwardingTableEntry* _table; 38 size_t _size; 39 40 ZForwardingTableEntry at(ZForwardingTableCursor* cursor) const; 41 ZForwardingTableEntry first(uintptr_t from_index, ZForwardingTableCursor* cursor) const; 42 ZForwardingTableEntry next(ZForwardingTableCursor* cursor) const; 43 44 public: 45 ZForwardingTable(); 46 ~ZForwardingTable(); 47 48 bool is_null() const; 49 void setup(size_t live_objects); 50 void reset(); 51 52 ZForwardingTableEntry find(uintptr_t from_index) const; 53 ZForwardingTableEntry find(uintptr_t from_index, ZForwardingTableCursor* cursor) const; 54 uintptr_t insert(uintptr_t from_index, uintptr_t to_offset, ZForwardingTableCursor* cursor); 55 56 void verify(size_t object_max_count, size_t live_objects) const; 57 }; 58 59 #endif // SHARE_GC_Z_ZFORWARDING_HPP