/*

 * Copyright (c) 2001, 2009, 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.

 *

 */

// Inline functions for G1CollectedHeap

inline HeapRegion*

G1CollectedHeap::heap_region_containing(const void* addr) const {

  HeapRegion* hr = _hrs->addr_to_region(addr);

  // hr can be null if addr in perm_gen

  if (hr != NULL && hr->continuesHumongous()) {

    hr = hr->humongous_start_region();

  }

  return hr;

}

inline HeapRegion*

G1CollectedHeap::heap_region_containing_raw(const void* addr) const {

  assert(_g1_reserved.contains(addr), "invariant");

  size_t index = pointer_delta(addr, _g1_reserved.start(), 1)

                                        >> HeapRegion::LogOfHRGrainBytes;

  HeapRegion* res = _hrs->at(index);

  assert(res == _hrs->addr_to_region(addr), "sanity");

  return res;

}

inline bool G1CollectedHeap::obj_in_cs(oop obj) {

  HeapRegion* r = _hrs->addr_to_region(obj);

  return r != NULL && r->in_collection_set();

}

inline HeapWord* G1CollectedHeap::attempt_allocation(size_t word_size,

                                              bool permit_collection_pause) {

  HeapWord* res = NULL;

  assert( SafepointSynchronize::is_at_safepoint() ||

          Heap_lock->owned_by_self(), "pre-condition of the call" );

  if (_cur_alloc_region != NULL) {

    // If this allocation causes a region to become non empty,

    // then we need to update our free_regions count.

    if (_cur_alloc_region->is_empty()) {

      res = _cur_alloc_region->allocate(word_size);

      if (res != NULL)

        _free_regions--;

    } else {

      res = _cur_alloc_region->allocate(word_size);

    }

  }

  if (res != NULL) {

    if (!SafepointSynchronize::is_at_safepoint()) {

      assert( Heap_lock->owned_by_self(), "invariant" );

      Heap_lock->unlock();

    }

    return res;

  }

  // attempt_allocation_slow will also unlock the heap lock when appropriate.

  return attempt_allocation_slow(word_size, permit_collection_pause);

}

inline RefToScanQueue* G1CollectedHeap::task_queue(int i) {

  return _task_queues->queue(i);

}

inline  bool G1CollectedHeap::isMarkedPrev(oop obj) const {

  return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj);

}

inline bool G1CollectedHeap::isMarkedNext(oop obj) const {

  return _cm->nextMarkBitMap()->isMarked((HeapWord *)obj);

}