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 /*

  * 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.

  *

  */

 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP

 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP

 #include "gc_implementation/g1/concurrentMark.hpp"

 #include "gc_implementation/g1/g1CollectedHeap.hpp"

 #include "gc_implementation/g1/g1OopClosures.hpp"

 #include "gc_implementation/g1/g1RemSet.hpp"

 /*

  * 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);

     }

   }

 }

 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP