/*

 * Copyright (c) 2015, 2019, 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

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 * questions.

 */

#ifndef SHARE_GC_Z_ZOOPCLOSURES_INLINE_HPP

#define SHARE_GC_Z_ZOOPCLOSURES_INLINE_HPP

#include "classfile/classLoaderData.hpp"

#include "gc/z/zBarrier.inline.hpp"

#include "gc/z/zHeap.inline.hpp"

#include "gc/z/zOop.inline.hpp"

#include "gc/z/zOopClosures.hpp"

#include "oops/oop.inline.hpp"

#include "runtime/atomic.hpp"

#include "utilities/debug.hpp"

inline void ZLoadBarrierOopClosure::do_oop(oop* p) {

  ZBarrier::load_barrier_on_oop_field(p);

}

inline void ZLoadBarrierOopClosure::do_oop(narrowOop* p) {

  ShouldNotReachHere();

}

inline void ZNMethodOopClosure::do_oop(oop* p) {

  if (ZResurrection::is_blocked()) {

    ZBarrier::keep_alive_barrier_on_phantom_root_oop_field(p);

  } else {

    ZBarrier::load_barrier_on_root_oop_field(p);

  }

}

inline void ZNMethodOopClosure::do_oop(narrowOop* p) {

  ShouldNotReachHere();

}

template <bool finalizable>

inline ZMarkBarrierOopClosure<finalizable>::ZMarkBarrierOopClosure() :

    ClaimMetadataVisitingOopIterateClosure(finalizable

                                               ? ClassLoaderData::_claim_finalizable

                                               : ClassLoaderData::_claim_strong,

                                           finalizable

                                               ? NULL

                                               : ZHeap::heap()->reference_discoverer()) {}

template <bool finalizable>

inline void ZMarkBarrierOopClosure<finalizable>::do_oop(oop* p) {

  ZBarrier::mark_barrier_on_oop_field(p, finalizable);

}

template <bool finalizable>

inline void ZMarkBarrierOopClosure<finalizable>::do_oop(narrowOop* p) {

  ShouldNotReachHere();

}

inline bool ZPhantomIsAliveObjectClosure::do_object_b(oop o) {

  return ZBarrier::is_alive_barrier_on_phantom_oop(o);

}

inline void ZPhantomKeepAliveOopClosure::do_oop(oop* p) {

  ZBarrier::keep_alive_barrier_on_phantom_oop_field(p);

}

inline void ZPhantomKeepAliveOopClosure::do_oop(narrowOop* p) {

  ShouldNotReachHere();

}

inline void ZPhantomCleanOopClosure::do_oop(oop* p) {

  // Read the oop once, to make sure the liveness check

  // and the later clearing uses the same value.

  const oop obj = *(volatile oop*)p;

  if (ZBarrier::is_alive_barrier_on_phantom_oop(obj)) {

    ZBarrier::keep_alive_barrier_on_phantom_oop_field(p);

  } else {

    // The destination could have been modified/reused, in which case

    // we don't want to clear it. However, no one could write the same

    // oop here again (the object would be strongly live and we would

    // not consider clearing such oops), so therefore we don't have an

    // ABA problem here.

  }

}

inline void ZPhantomCleanOopClosure::do_oop(narrowOop* p) {

  ShouldNotReachHere();

}

#endif // SHARE_GC_Z_ZOOPCLOSURES_INLINE_HPP