/*

 * Copyright (c) 2001, 2012, 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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 */

#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP

#define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP

inline HeapWord* G1OffsetTableContigSpace::allocate(size_t size) {

  HeapWord* res = ContiguousSpace::allocate(size);

  if (res != NULL) {

    _offsets.alloc_block(res, size);

  }

  return res;

}

// Because of the requirement of keeping "_offsets" up to date with the

// allocations, we sequentialize these with a lock.  Therefore, best if

// this is used for larger LAB allocations only.

inline HeapWord* G1OffsetTableContigSpace::par_allocate(size_t size) {

  MutexLocker x(&_par_alloc_lock);

  // Given that we take the lock no need to use par_allocate() here.

  HeapWord* res = ContiguousSpace::allocate(size);

  if (res != NULL) {

    _offsets.alloc_block(res, size);

  }

  return res;

}

inline HeapWord* G1OffsetTableContigSpace::block_start(const void* p) {

  return _offsets.block_start(p);

}

inline HeapWord*

G1OffsetTableContigSpace::block_start_const(const void* p) const {

  return _offsets.block_start_const(p);

}

inline void HeapRegion::note_start_of_marking() {

  _next_marked_bytes = 0;

  _next_top_at_mark_start = top();

}

inline void HeapRegion::note_end_of_marking() {

  _prev_top_at_mark_start = _next_top_at_mark_start;

  _prev_marked_bytes = _next_marked_bytes;

  _next_marked_bytes = 0;

  assert(_prev_marked_bytes <=

         (size_t) pointer_delta(prev_top_at_mark_start(), bottom()) *

         HeapWordSize, "invariant");

}

inline void HeapRegion::note_start_of_copying(bool during_initial_mark) {

  if (is_survivor()) {

    // This is how we always allocate survivors.

    assert(_next_top_at_mark_start == bottom(), "invariant");

  } else {

    if (during_initial_mark) {

      // During initial-mark we'll explicitly mark any objects on old

      // regions that are pointed to by roots. Given that explicit

      // marks only make sense under NTAMS it'd be nice if we could

      // check that condition if we wanted to. Given that we don't

      // know where the top of this region will end up, we simply set

      // NTAMS to the end of the region so all marks will be below

      // NTAMS. We'll set it to the actual top when we retire this region.

      _next_top_at_mark_start = end();

    } else {

      // We could have re-used this old region as to-space over a

      // couple of GCs since the start of the concurrent marking

      // cycle. This means that [bottom,NTAMS) will contain objects

      // copied up to and including initial-mark and [NTAMS, top)

      // will contain objects copied during the concurrent marking cycle.

      assert(top() >= _next_top_at_mark_start, "invariant");

    }

  }

}

inline void HeapRegion::note_end_of_copying(bool during_initial_mark) {

  if (is_survivor()) {

    // This is how we always allocate survivors.

    assert(_next_top_at_mark_start == bottom(), "invariant");

  } else {

    if (during_initial_mark) {

      // See the comment for note_start_of_copying() for the details

      // on this.

      assert(_next_top_at_mark_start == end(), "pre-condition");

      _next_top_at_mark_start = top();

    } else {

      // See the comment for note_start_of_copying() for the details

      // on this.

      assert(top() >= _next_top_at_mark_start, "invariant");

    }

  }

}

#endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP