/*

 * Copyright (c) 2015, 2018, Red Hat, Inc. All rights reserved.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHBROOKSPOINTER_INLINE_HPP

#define SHARE_VM_GC_SHENANDOAH_SHENANDOAHBROOKSPOINTER_INLINE_HPP

#include "gc/shenandoah/shenandoahAsserts.hpp"

#include "gc/shenandoah/shenandoahBrooksPointer.hpp"

#include "runtime/atomic.hpp"

inline HeapWord** ShenandoahBrooksPointer::brooks_ptr_addr(oop obj) {

  return (HeapWord**)((HeapWord*) obj + word_offset());

}

inline void ShenandoahBrooksPointer::initialize(oop obj) {

  shenandoah_assert_in_heap(NULL, obj);

  *brooks_ptr_addr(obj) = (HeapWord*) obj;

}

inline void ShenandoahBrooksPointer::set_raw(oop obj, HeapWord* update) {

  shenandoah_assert_in_heap(NULL, obj);

  *brooks_ptr_addr(obj) = update;

}

inline HeapWord* ShenandoahBrooksPointer::get_raw(oop obj) {

  shenandoah_assert_in_heap(NULL, obj);

  return *brooks_ptr_addr(obj);

}

inline HeapWord* ShenandoahBrooksPointer::get_raw_unchecked(oop obj) {

  return *brooks_ptr_addr(obj);

}

inline oop ShenandoahBrooksPointer::forwardee(oop obj) {

  shenandoah_assert_correct(NULL, obj);

  return oop(*brooks_ptr_addr(obj));

}

inline oop ShenandoahBrooksPointer::try_update_forwardee(oop obj, oop update) {

  oop result = (oop) Atomic::cmpxchg(update, (oop*)brooks_ptr_addr(obj), obj);

  shenandoah_assert_correct_except(NULL, obj, !oopDesc::equals_raw(result, obj));

  return result;

}

#endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHBROOKSPOINTER_INLINE_HPP