1 /* 2 * Copyright (c) 2015, Red Hat, Inc. and/or its affiliates. 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_BROOKSPOINTER_INLINE_HPP 25 #define SHARE_VM_GC_SHENANDOAH_BROOKSPOINTER_INLINE_HPP 26 27 #include "gc_implementation/shenandoah/brooksPointer.hpp" 28 #include "gc_implementation/shenandoah/shenandoahAsserts.hpp" 29 #include "gc_implementation/shenandoah/shenandoahHeap.hpp" 30 #include "gc_implementation/shenandoah/shenandoahHeapRegion.hpp" 31 #include "gc_implementation/shenandoah/shenandoahLogging.hpp" 32 #include "runtime/atomic.hpp" 33 34 inline HeapWord** BrooksPointer::brooks_ptr_addr(oop obj) { 35 return (HeapWord**)((HeapWord*) obj + word_offset()); 36 } 37 38 inline void BrooksPointer::initialize(oop obj) { 39 shenandoah_assert_in_heap(NULL, obj); 40 *brooks_ptr_addr(obj) = (HeapWord*) obj; 41 } 42 43 inline void BrooksPointer::set_raw(oop obj, HeapWord* update) { 44 shenandoah_assert_in_heap(NULL, obj); 45 *brooks_ptr_addr(obj) = update; 46 } 47 48 inline HeapWord* BrooksPointer::get_raw(oop obj) { 49 shenandoah_assert_in_heap(NULL, obj); 50 return *brooks_ptr_addr(obj); 51 } 52 53 inline HeapWord* BrooksPointer::get_raw_unchecked(oop obj) { 54 return *brooks_ptr_addr(obj); 55 } 56 57 inline oop BrooksPointer::forwardee(oop obj) { 58 shenandoah_assert_correct(NULL, obj); 59 return oop(*brooks_ptr_addr(obj)); 60 } 61 62 inline oop BrooksPointer::try_update_forwardee(oop obj, oop update) { 63 oop result = (oop) Atomic::cmpxchg_ptr(update, brooks_ptr_addr(obj), obj); 64 shenandoah_assert_correct_except(NULL, obj, !oopDesc::unsafe_equals(result, obj)); 65 return result; 66 } 67 68 #endif // SHARE_VM_GC_SHENANDOAH_BROOKSPOINTER_INLINE_HPP