/*

 * Copyright (c) 2017, 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.

 *

 */

#include "gc/shenandoah/shenandoahStrDedupQueue.hpp"

template <uint buffer_size>

ShenandoahOopBuffer<buffer_size>::ShenandoahOopBuffer() :

  _index(0), _next(NULL) {

}

template <uint buffer_size>

bool ShenandoahOopBuffer<buffer_size>::is_full() const {

  return _index >= buffer_size;

}

template <uint buffer_size>

bool ShenandoahOopBuffer<buffer_size>::is_empty() const {

  return _index == 0;

}

template <uint buffer_size>

uint ShenandoahOopBuffer<buffer_size>::size() const {

  return _index;

}

template <uint buffer_size>

void ShenandoahOopBuffer<buffer_size>::push(oop obj) {

  assert(!is_full(),  "Buffer is full");

  _buf[_index ++] = obj;

}

template <uint buffer_size>

oop ShenandoahOopBuffer<buffer_size>::pop() {

  assert(!is_empty(), "Buffer is empty");

  return _buf[--_index];

}

template <uint buffer_size>

void ShenandoahOopBuffer<buffer_size>::set_next(ShenandoahOopBuffer<buffer_size>* next) {

  _next = next;

}

template <uint buffer_size>

ShenandoahOopBuffer<buffer_size>* ShenandoahOopBuffer<buffer_size>::next() const {

  return _next;

}

template <uint buffer_size>

void ShenandoahOopBuffer<buffer_size>::reset() {

  _index = 0;

  _next = NULL;

}

template <uint buffer_size>

void ShenandoahOopBuffer<buffer_size>::unlink_or_oops_do(StringDedupUnlinkOrOopsDoClosure* cl) {

  for (uint index = 0; index < size(); index ++) {

    oop* obj_addr = &_buf[index];

    if (*obj_addr != NULL) {

      if (cl->is_alive(*obj_addr)) {

        cl->keep_alive(obj_addr);

      } else {

        *obj_addr = NULL;

      }

    }

  }

}

template <uint buffer_size>

void ShenandoahOopBuffer<buffer_size>::oops_do(OopClosure* cl) {

  for (uint index = 0; index < size(); index ++) {

    cl->do_oop(&_buf[index]);

  }

}