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 /*

  * Copyright (c) 2005, 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

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  */

 #ifndef SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP

 #define SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP

 #ifndef SERIALGC

 #include "gc_implementation/parNew/parNewGeneration.hpp"

 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"

 #include "gc_implementation/parallelScavenge/psCompactionManager.hpp"

 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"

 #include "gc_implementation/parallelScavenge/psScavenge.hpp"

 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"

 #endif

 inline void oopDesc::update_contents(ParCompactionManager* cm) {

   // The klass field must be updated before anything else

   // can be done.

   DEBUG_ONLY(klassOopDesc* original_klass = klass());

   // Can the option to update and/or copy be moved up in the

   // call chain to avoid calling into here?

   if (PSParallelCompact::should_update_klass(klass())) {

     update_header();

     assert(klass()->is_klass(), "Not updated correctly");

   } else {

     assert(klass()->is_klass(), "Not updated");

   }

   Klass* new_klass = blueprint();

   if (!new_klass->oop_is_typeArray()) {

     // It might contain oops beyond the header, so take the virtual call.

     new_klass->oop_update_pointers(cm, this);

   }

   // Else skip it.  The typeArrayKlass in the header never needs scavenging.

 }

 inline void oopDesc::update_contents(ParCompactionManager* cm,

                                      HeapWord* begin_limit,

                                      HeapWord* end_limit) {

   // The klass field must be updated before anything else

   // can be done.

   debug_only(klassOopDesc* original_klass = klass());

   update_contents(cm, klass(), begin_limit, end_limit);

 }

 inline void oopDesc::update_contents(ParCompactionManager* cm,

                                      klassOop old_klass,

                                      HeapWord* begin_limit,

                                      HeapWord* end_limit) {

   klassOop updated_klass =

     PSParallelCompact::summary_data().calc_new_klass(old_klass);

   // Needs to be boundary aware for the 64 bit case

   // update_header();

   // The klass has moved.  Is the location of the klass

   // within the limits?

   if ((((HeapWord*)&_metadata._klass) >= begin_limit) &&

       (((HeapWord*)&_metadata._klass) < end_limit)) {

     set_klass(updated_klass);

   }

   Klass* klass = updated_klass->klass_part();

   if (!klass->oop_is_typeArray()) {

     // It might contain oops beyond the header, so take the virtual call.

     klass->oop_update_pointers(cm, this, begin_limit, end_limit);

   }

   // Else skip it.  The typeArrayKlass in the header never needs scavenging.

 }

 inline void oopDesc::follow_contents(ParCompactionManager* cm) {

   assert (PSParallelCompact::mark_bitmap()->is_marked(this),

     "should be marked");

   blueprint()->oop_follow_contents(cm, this);

 }

 // Used by parallel old GC.

 inline void oopDesc::follow_header(ParCompactionManager* cm) {

   if (UseCompressedOops) {

     PSParallelCompact::mark_and_push(cm, compressed_klass_addr());

   } else {

     PSParallelCompact::mark_and_push(cm, klass_addr());

   }

 }

 inline oop oopDesc::forward_to_atomic(oop p) {

   assert(ParNewGeneration::is_legal_forward_ptr(p),

          "illegal forwarding pointer value.");

   markOop oldMark = mark();

   markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p);

   markOop curMark;

   assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable");

   assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this.");

   while (!oldMark->is_marked()) {

     curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark);

     assert(is_forwarded(), "object should have been forwarded");

     if (curMark == oldMark) {

       return NULL;

     }

     // If the CAS was unsuccessful then curMark->is_marked()

     // should return true as another thread has CAS'd in another

     // forwarding pointer.

     oldMark = curMark;

   }

   return forwardee();

 }

 inline void oopDesc::update_header() {

   if (UseCompressedOops) {

     PSParallelCompact::adjust_pointer(compressed_klass_addr());

   } else {

     PSParallelCompact::adjust_pointer(klass_addr());

   }

 }

 inline void oopDesc::update_header(HeapWord* beg_addr, HeapWord* end_addr) {

   if (UseCompressedOops) {

     PSParallelCompact::adjust_pointer(compressed_klass_addr(),

                                       beg_addr, end_addr);

   } else {

     PSParallelCompact::adjust_pointer(klass_addr(), beg_addr, end_addr);

   }

 }

 #endif // SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP