src/hotspot/share/gc/parallel/psPromotionLAB.inline.hpp

/*
 * Copyright (c) 2014, 2023, 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).
 *
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 * 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_PARALLEL_PSPROMOTIONLAB_INLINE_HPP
#define SHARE_GC_PARALLEL_PSPROMOTIONLAB_INLINE_HPP

#include "gc/parallel/psPromotionLAB.hpp"

#include "gc/shared/collectedHeap.inline.hpp"
#include "utilities/align.hpp"

HeapWord* PSYoungPromotionLAB::allocate(size_t size) {
  // Can't assert this, when young fills, we keep the LAB around, but flushed.
  // assert(_state != flushed, "Sanity");
  HeapWord* obj = top();
  if (size <= pointer_delta(end(), obj)) {
    HeapWord* new_top = obj + size;
    set_top(new_top);
    assert(is_object_aligned(new_top), "checking alignment");
    return obj;
  } else {
    return nullptr;
  }
}

#endif // SHARE_GC_PARALLEL_PSPROMOTIONLAB_INLINE_HPP