/*

 * Copyright (c) 2000, 2010, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef SHARE_VM_MEMORY_SPACE_INLINE_HPP

#define SHARE_VM_MEMORY_SPACE_INLINE_HPP

#include "gc_interface/collectedHeap.hpp"

#include "memory/space.hpp"

#include "memory/universe.hpp"

#include "runtime/safepoint.hpp"

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

  return block_start_const(p);

}

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

  MutexLocker x(&_par_alloc_lock);

  // This ought to be just "allocate", because of the lock above, but that

  // ContiguousSpace::allocate asserts that either the allocating thread

  // holds the heap lock or it is the VM thread and we're at a safepoint.

  // The best I (dld) could figure was to put a field in ContiguousSpace

  // meaning "locking at safepoint taken care of", and set/reset that

  // here.  But this will do for now, especially in light of the comment

  // above.  Perhaps in the future some lock-free manner of keeping the

  // coordination.

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

  if (res != NULL) {

    _offsets.alloc_block(res, size);

  }

  return res;

}

inline HeapWord*

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

  return _offsets.block_start(p);

}

inline HeapWord* ContiguousSpace::concurrent_iteration_safe_limit()

{

  assert(_concurrent_iteration_safe_limit <= top(),

         "_concurrent_iteration_safe_limit update missed");

  return _concurrent_iteration_safe_limit;

}

inline void ContiguousSpace::set_concurrent_iteration_safe_limit(HeapWord* new_limit)

{

  assert(new_limit <= top(), "uninitialized objects in the safe range");

  _concurrent_iteration_safe_limit = new_limit;

}

#endif // SHARE_VM_MEMORY_SPACE_INLINE_HPP