1 /* 2 * Copyright (c) 1997, 2014, 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 #include "precompiled.hpp" 26 #include "oops/objArrayKlass.hpp" 27 #include "oops/objArrayOop.hpp" 28 #include "oops/oop.inline.hpp" 29 30 oop objArrayOopDesc::atomic_compare_exchange_oop(int index, oop exchange_value, 31 oop compare_value) { 32 volatile HeapWord* dest; 33 if (UseCompressedOops) { 34 dest = (HeapWord*)obj_at_addr<narrowOop>(index); 35 } else { 36 dest = (HeapWord*)obj_at_addr<oop>(index); 37 } 38 oop res = oopDesc::atomic_compare_exchange_oop(exchange_value, dest, compare_value, true); 39 // update card mark if success 40 if (res == compare_value) { 41 update_barrier_set((void*)dest, exchange_value); 42 } 43 return res; 44 }