src/hotspot/share/gc/shenandoah/shenandoahTaskqueue.inline.hpp

/*
 * Copyright (c) 2016, 2019, Red Hat, Inc. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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#ifndef SHARE_GC_SHENANDOAH_SHENANDOAHTASKQUEUE_INLINE_HPP
#define SHARE_GC_SHENANDOAH_SHENANDOAHTASKQUEUE_INLINE_HPP

#include "gc/shenandoah/shenandoahTaskqueue.hpp"

#include "gc/shared/taskqueue.inline.hpp"
#include "utilities/stack.inline.hpp"

template <class E, MemTag MT, unsigned int N>
bool BufferedOverflowTaskQueue<E, MT, N>::pop(E &t) {
  if (!_buf_empty) {
    t = _elem;
    _buf_empty = true;
    return true;
  }

  if (taskqueue_t::pop_local(t)) {
    return true;
  }

  return taskqueue_t::pop_overflow(t);
}

template <class E, MemTag MT, unsigned int N>
inline bool BufferedOverflowTaskQueue<E, MT, N>::push(E t) {
  if (_buf_empty) {
    _elem = t;
    _buf_empty = false;
  } else {
    bool pushed = taskqueue_t::push(_elem);
    assert(pushed, "overflow queue should always succeed pushing");
    _elem = t;
  }
  return true;
}

template <class E, MemTag MT, unsigned int N>
void BufferedOverflowTaskQueue<E, MT, N>::clear() {
    _buf_empty = true;
    taskqueue_t::set_empty();
    taskqueue_t::overflow_stack()->clear();
}


#endif // SHARE_GC_SHENANDOAH_SHENANDOAHTASKQUEUE_INLINE_HPP