/*
 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * 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_G1_G1BARRIERSET_INLINE_HPP
#define SHARE_VM_GC_G1_G1BARRIERSET_INLINE_HPP

#include "gc/shared/modRefBarrierSet.inline.hpp"
#include "gc/g1/g1CardTable.inline.hpp"
#include "gc/g1/g1BarrierSet.hpp"
#include "runtime/orderAccess.inline.hpp"

template <DecoratorSet decorators>
inline void G1BarrierSet::write_ref_field_pre(void* field) {
  if (DecoratorTest<decorators>::HAS_DEST_NOT_INITIALIZED) {
    return;
  }
  typedef typename EncodedOopType<decorators>::type Encoded;
  Encoded *addr = (Encoded*)field;

  Encoded heap_oop = oopDesc::load_heap_oop(addr);
  if (!oopDesc::is_null(heap_oop)) {
    satb_enqueue(oopDesc::decode_heap_oop_not_null(heap_oop));
  }
}

// This barrier is used by G1 to remember the old oop values, so
// that we don't forget any objects that were live at the snapshot at
// the beginning. This function is only used when we write oops into Klasses.
inline void G1BarrierSet::klass_update_barrier_set_pre(Klass* klass, oop* p) {
  oop obj = *p;
  if (!oopDesc::is_null(obj)) {
    satb_enqueue(obj);
  }
}

template <DecoratorSet decorators>
inline void G1BarrierSet::write_ref_field_post(void* field, oop new_val) {
  volatile jbyte* byte = _card_table->byte_for(field);
  if (*byte == G1CardTable::g1_young_card_val()) {
    return;
  }
  OrderAccess::storeload();
  if (*byte != G1CardTable::dirty_card_val()) {
    *byte = G1CardTable::dirty_card_val();
    card_enqueue(byte);
  }
}

template <DecoratorSet decorators>
inline oop G1BarrierSet::AccessBarrier<decorators>::oop_load(void* addr) {
  oop value = ModRef::oop_load(addr);
  if (DecoratorTest<decorators>::IS_ON_REFERENCE && !DecoratorTest<decorators>::HAS_ACCESS_WEAK &&
      !oopDesc::is_null(value)) {
    satb_enqueue(value);
  }
  return value;
}

template <DecoratorSet decorators>
inline oop G1BarrierSet::AccessBarrier<decorators>::oop_load_at(oop base, ptrdiff_t offset) {
  oop load_val = ModRef::oop_load_at(base, offset);
  if (!DecoratorTest<decorators>::HAS_ACCESS_WEAK &&
      (DecoratorTest<decorators>::IS_ON_REFERENCE ||
       (DecoratorTest<decorators>::HAS_ACCESS_ON_ANONYMOUS &&
        load_val != NULL &&
        !oopDesc::is_null(base) &&
        is_referent_field(base, offset)))) {
    satb_enqueue(load_val);
  }

  return load_val;
}

template <DecoratorSet decorators>
inline void G1BarrierSet::AccessBarrier<decorators>::oop_store_at(nmethod* base, ptrdiff_t offset, oop new_value) {
  G1BarrierSet *bs = barrier_set_cast<G1BarrierSet>(oopDesc::bs());
  bs->write_ref_nmethod_pre(base, offset);
  Basic::oop_store_at(base, offset, new_value);
  bs->write_ref_nmethod_post(base, new_value);
}

#endif // SHARE_VM_GC_G1_G1BARRIERSET_INLINE_HPP