1 /* 2 * Copyright (c) 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 25 #ifndef SHARE_VM_GC_SHARED_FILL_HPP 26 #define SHARE_VM_GC_SHARED_FILL_HPP 27 28 #include "memory/allocation.hpp" 29 #include "utilities/globalDefinitions.hpp" 30 31 class Fill : public AllStatic { 32 private: 33 static bool _disabled; 34 static size_t _extra_header_size; 35 static size_t _min_size; 36 static size_t _max_size; 37 38 static size_t object_header_size(); 39 static size_t array_header_size(); 40 static size_t array_max_payload_size(); 41 static size_t array_length(size_t size); 42 43 static void fill_with_object(HeapWord* start); 44 static void fill_with_array(HeapWord* start, size_t size); 45 46 public: 47 static void initialize(); 48 static void set_disabled(); 49 static void set_extra_header_size(size_t extra_header_size); 50 static void set_max_size(size_t max_size); 51 52 static size_t min_size() { return _min_size; } 53 static size_t max_size() { return _max_size; } 54 static size_t min_reserve_size(); 55 56 static void range(HeapWord* start, size_t size); 57 static void range(HeapWord* start, HeapWord* end); 58 }; 59 60 #endif // SHARE_VM_GC_SHARED_FILL_HPP