/*

 * Copyright 2002-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 *

 */

inline PSPromotionManager* PSPromotionManager::manager_array(int index) {

  assert(_manager_array != NULL, "access of NULL manager_array");

  assert(index >= 0 && index <= (int)ParallelGCThreads, "out of range manager_array access");

  return _manager_array[index];

}

inline void PSPromotionManager::claim_or_forward_internal_depth(oop* p) {

  if (p != NULL) {

    oop o = *p;

    if (o->is_forwarded()) {

      o = o->forwardee();

      // Card mark

      if (PSScavenge::is_obj_in_young((HeapWord*) o)) {

        PSScavenge::card_table()->inline_write_ref_field_gc(p, o);

      }

      *p = o;

    } else {

      push_depth(p);

    }

  }

}

inline void PSPromotionManager::claim_or_forward_internal_breadth(oop* p) {

  if (p != NULL) {

    oop o = *p;

    if (o->is_forwarded()) {

      o = o->forwardee();

    } else {

      o = copy_to_survivor_space(o, false);

    }

    // Card mark

    if (PSScavenge::is_obj_in_young((HeapWord*) o)) {

      PSScavenge::card_table()->inline_write_ref_field_gc(p, o);

    }

    *p = o;

  }

}

inline void PSPromotionManager::flush_prefetch_queue() {

  assert(!depth_first(), "invariant");

  for (int i=0; i<_prefetch_queue.length(); i++) {

    claim_or_forward_internal_breadth(_prefetch_queue.pop());

  }

}

inline void PSPromotionManager::claim_or_forward_depth(oop* p) {

  assert(depth_first(), "invariant");

  assert(PSScavenge::should_scavenge(*p, true), "revisiting object?");

  assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");

  assert(Universe::heap()->is_in(p), "pointer outside heap");

  claim_or_forward_internal_depth(p);

}

inline void PSPromotionManager::claim_or_forward_breadth(oop* p) {

  assert(!depth_first(), "invariant");

  assert(PSScavenge::should_scavenge(*p, true), "revisiting object?");

  assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");

  assert(Universe::heap()->is_in(p), "pointer outside heap");

  if (UsePrefetchQueue) {

    claim_or_forward_internal_breadth(_prefetch_queue.push_and_pop(p));

  } else {

    // This option is used for testing.  The use of the prefetch

    // queue can delay the processing of the objects and thus

    // change the order of object scans.  For example, remembered

    // set updates are typically the clearing of the remembered

    // set (the cards) followed by updates of the remembered set

    // for young-to-old pointers.  In a situation where there

    // is an error in the sequence of clearing and updating

    // (e.g. clear card A, update card A, erroneously clear

    // card A again) the error can be obscured by a delay

    // in the update due to the use of the prefetch queue

    // (e.g., clear card A, erroneously clear card A again,

    // update card A that was pushed into the prefetch queue

    // and thus delayed until after the erronous clear).  The

    // length of the delay is random depending on the objects

    // in the queue and the delay can be zero.

    claim_or_forward_internal_breadth(p);

  }

}

inline void PSPromotionManager::process_popped_location_depth(oop* p) {

  if (is_oop_masked(p)) {

    assert(PSChunkLargeArrays, "invariant");

    oop const old = unmask_chunked_array_oop(p);

    process_array_chunk(old);

  } else {

    PSScavenge::copy_and_push_safe_barrier(this, p);

  }

}