/*

 * Copyright (c) 2001, 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.

 *

 */

/*

 * This really ought to be an inline function, but apparently the C++

 * compiler sometimes sees fit to ignore inline declarations.  Sigh.

 */

// This must a ifdef'ed because the counting it controls is in a

// perf-critical inner loop.

#define FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT 0

template <class T> inline void FilterIntoCSClosure::do_oop_nv(T* p) {

  T heap_oop = oopDesc::load_heap_oop(p);

  if (!oopDesc::is_null(heap_oop) &&

      _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop))) {

    _oc->do_oop(p);

#if FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT

    if (_dcto_cl != NULL)

      _dcto_cl->incr_count();

#endif

  }

}

#define FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT 0

template <class T> inline void FilterOutOfRegionClosure::do_oop_nv(T* p) {

  T heap_oop = oopDesc::load_heap_oop(p);

  if (!oopDesc::is_null(heap_oop)) {

    HeapWord* obj_hw = (HeapWord*)oopDesc::decode_heap_oop_not_null(heap_oop);

    if (obj_hw < _r_bottom || obj_hw >= _r_end) {

      _oc->do_oop(p);

#if FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT

      _out_of_region++;

#endif

    }

  }

}

template <class T> inline void FilterInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {

  T heap_oop = oopDesc::load_heap_oop(p);

  if (!oopDesc::is_null(heap_oop) &&

      _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop)))

    _oc->do_oop(p);

}

template <class T> inline void FilterAndMarkInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {

  T heap_oop = oopDesc::load_heap_oop(p);

  if (!oopDesc::is_null(heap_oop)) {

    oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);

    HeapRegion* hr = _g1->heap_region_containing((HeapWord*) obj);

    if (hr != NULL) {

      if (hr->in_collection_set())

        _oc->do_oop(p);

      else if (!hr->is_young())

        _cm->grayRoot(obj);

    }

  }

}

// This closure is applied to the fields of the objects that have just been copied.

template <class T> inline void G1ParScanClosure::do_oop_nv(T* p) {

  T heap_oop = oopDesc::load_heap_oop(p);

  if (!oopDesc::is_null(heap_oop)) {

    oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);

    if (_g1->in_cset_fast_test(obj)) {

      // We're not going to even bother checking whether the object is

      // already forwarded or not, as this usually causes an immediate

      // stall. We'll try to prefetch the object (for write, given that

      // we might need to install the forwarding reference) and we'll

      // get back to it when pop it from the queue

      Prefetch::write(obj->mark_addr(), 0);

      Prefetch::read(obj->mark_addr(), (HeapWordSize*2));

      // slightly paranoid test; I'm trying to catch potential

      // problems before we go into push_on_queue to know where the

      // problem is coming from

      assert(obj == oopDesc::load_decode_heap_oop(p),

             "p should still be pointing to obj");

      _par_scan_state->push_on_queue(p);

    } else {

      _par_scan_state->update_rs(_from, p, _par_scan_state->queue_num());

    }

  }

}

template <class T> inline void G1ParPushHeapRSClosure::do_oop_nv(T* p) {

  T heap_oop = oopDesc::load_heap_oop(p);

  if (!oopDesc::is_null(heap_oop)) {

    oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);

    if (_g1->in_cset_fast_test(obj)) {

      Prefetch::write(obj->mark_addr(), 0);

      Prefetch::read(obj->mark_addr(), (HeapWordSize*2));

      // Place on the references queue

      _par_scan_state->push_on_queue(p);

    }

  }

}