1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_GC_SHARED_REFERENCEPROCESSOR_INLINE_HPP
  26 #define SHARE_VM_GC_SHARED_REFERENCEPROCESSOR_INLINE_HPP
  27 
  28 #include "gc/shared/referenceProcessor.hpp"
  29 #include "oops/compressedOops.inline.hpp"
  30 #include "oops/oop.hpp"
  31 
  32 oop DiscoveredList::head() const {
  33   return UseCompressedOops ?  CompressedOops::decode(_compressed_head) :
  34     _oop_head;
  35 }
  36 
  37 void DiscoveredList::set_head(oop o) {
  38   if (UseCompressedOops) {
  39     // Must compress the head ptr.
  40     _compressed_head = CompressedOops::encode(o);
  41   } else {
  42     _oop_head = o;
  43   }
  44 }
  45 
  46 bool DiscoveredList::is_empty() const {
  47  return head() == NULL;
  48 }
  49 
  50 DiscoveredListIterator::DiscoveredListIterator(DiscoveredList&    refs_list,
  51                                                OopClosure*        keep_alive,
  52                                                BoolObjectClosure* is_alive):
  53   _refs_list(refs_list),
  54   _prev_next(refs_list.adr_head()),
  55   _prev(NULL),
  56   _ref(refs_list.head()),
  57 #ifdef ASSERT
  58   _first_seen(refs_list.head()),
  59 #endif
  60 #ifndef PRODUCT
  61   _processed(0),
  62   _removed(0),
  63 #endif
  64   _next(NULL),
  65   _keep_alive(keep_alive),
  66   _is_alive(is_alive) {
  67 }
  68 
  69 #endif // SHARE_VM_GC_SHARED_REFERENCEPROCESSOR_INLINE_HPP