/*

 * Copyright (c) 2018, 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.

 *

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 */

#ifndef SHARE_GC_SHARED_OOPSTORAGEPARSTATE_INLINE_HPP

#define SHARE_GC_SHARED_OOPSTORAGEPARSTATE_INLINE_HPP

#include "gc/shared/oopStorage.inline.hpp"

#include "gc/shared/oopStorageParState.hpp"

#include "metaprogramming/conditional.hpp"

#include "utilities/macros.hpp"

template<typename F>

class OopStorage::BasicParState::AlwaysTrueFn {

  F _f;

public:

  AlwaysTrueFn(F f) : _f(f) {}

  template<typename OopPtr>     // [const] oop*

  bool operator()(OopPtr ptr) const { _f(ptr); return true; }

};

struct OopStorage::BasicParState::IterationData {

  size_t _segment_start;

  size_t _segment_end;

  size_t _processed;

};

template<bool is_const, typename F>

inline void OopStorage::BasicParState::iterate(F f) {

  // Wrap f in ATF so we can use Block::iterate.

  AlwaysTrueFn<F> atf_f(f);

  IterationData data = {};      // zero initialize.

  while (claim_next_segment(&data)) {

    assert(data._segment_start < data._segment_end, "invariant");

    assert(data._segment_end <= _block_count, "invariant");

    typedef typename Conditional<is_const, const Block*, Block*>::type BlockPtr;

    size_t i = data._segment_start;

    do {

      BlockPtr block = _active_array->at(i);

      block->iterate(atf_f);

    } while (++i < data._segment_end);

  }

}

template<bool concurrent, bool is_const>

template<typename F>

inline void OopStorage::ParState<concurrent, is_const>::iterate(F f) {

  _basic_state.template iterate<is_const>(f);

}

template<bool concurrent, bool is_const>

template<typename Closure>

inline void OopStorage::ParState<concurrent, is_const>::oops_do(Closure* cl) {

  this->iterate(oop_fn(cl));

}

template<typename F>

inline void OopStorage::ParState<false, false>::iterate(F f) {

  _basic_state.template iterate<false>(f);

}

template<typename Closure>

inline void OopStorage::ParState<false, false>::oops_do(Closure* cl) {

  this->iterate(oop_fn(cl));

}

template<typename Closure>

inline void OopStorage::ParState<false, false>::weak_oops_do(Closure* cl) {

  this->iterate(skip_null_fn(oop_fn(cl)));

}

template<typename IsAliveClosure, typename Closure>

inline void OopStorage::ParState<false, false>::weak_oops_do(IsAliveClosure* is_alive, Closure* cl) {

  this->iterate(if_alive_fn(is_alive, oop_fn(cl)));

}

#endif // SHARE_GC_SHARED_OOPSTORAGEPARSTATE_INLINE_HPP