1 /* 2 * Copyright (c) 2015, 2018, Red Hat, Inc. All rights reserved. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHBROOKSPOINTER_INLINE_HPP 25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHBROOKSPOINTER_INLINE_HPP 26 27 #include "gc/shenandoah/shenandoahAsserts.hpp" 28 #include "gc/shenandoah/shenandoahBrooksPointer.hpp" 29 #include "runtime/atomic.hpp" 30 31 inline HeapWord** ShenandoahBrooksPointer::brooks_ptr_addr(oop obj) { 32 return (HeapWord**)((HeapWord*) obj + word_offset()); 33 } 34 35 inline void ShenandoahBrooksPointer::initialize(oop obj) { 36 shenandoah_assert_in_heap(NULL, obj); 37 *brooks_ptr_addr(obj) = (HeapWord*) obj; 38 } 39 40 inline void ShenandoahBrooksPointer::set_raw(oop obj, HeapWord* update) { 41 shenandoah_assert_in_heap(NULL, obj); 42 *brooks_ptr_addr(obj) = update; 43 } 44 45 inline HeapWord* ShenandoahBrooksPointer::get_raw(oop obj) { 46 shenandoah_assert_in_heap(NULL, obj); 47 return *brooks_ptr_addr(obj); 48 } 49 50 inline HeapWord* ShenandoahBrooksPointer::get_raw_unchecked(oop obj) { 51 return *brooks_ptr_addr(obj); 52 } 53 54 inline oop ShenandoahBrooksPointer::forwardee(oop obj) { 55 shenandoah_assert_correct(NULL, obj); 56 return oop(*brooks_ptr_addr(obj)); 57 } 58 59 inline oop ShenandoahBrooksPointer::try_update_forwardee(oop obj, oop update) { 60 oop result = (oop) Atomic::cmpxchg(update, (oop*)brooks_ptr_addr(obj), obj); 61 shenandoah_assert_correct_except(NULL, obj, !oopDesc::equals_raw(result, obj)); 62 return result; 63 } 64 65 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHBROOKSPOINTER_INLINE_HPP