1 /*
   2  * Copyright (c) 2015, Red Hat, Inc. and/or its affiliates.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHBARRIERSET_INLINE_HPP
  25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHBARRIERSET_INLINE_HPP
  26 
  27 #include "gc/shenandoah/shenandoahBarrierSet.hpp"
  28 #include "gc/shenandoah/shenandoahConnectionMatrix.hpp"
  29 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
  30 
  31 inline oop ShenandoahBarrierSet::resolve_forwarded_not_null(oop p) {
  32   return BrooksPointer::forwardee(p);
  33 }
  34 
  35 inline oop ShenandoahBarrierSet::resolve_forwarded(oop p) {
  36   if (((HeapWord*) p) != NULL) {
  37     return resolve_forwarded_not_null(p);
  38   } else {
  39     return p;
  40   }
  41 }
  42 
  43 template <DecoratorSet decorators, typename BarrierSetT>
  44 template <typename T>
  45 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap(oop new_value, T* addr, oop compare_value) {
  46   oop res;
  47   oop expected = compare_value;
  48   do {
  49     compare_value = expected;
  50     res = Raw::oop_atomic_cmpxchg(new_value, addr, compare_value);
  51     expected = res;
  52   } while ((! oopDesc::unsafe_equals(compare_value, expected)) && oopDesc::unsafe_equals(BarrierSet::barrier_set()->read_barrier(compare_value), BarrierSet::barrier_set()->read_barrier(expected)));
  53   if (oopDesc::unsafe_equals(expected, compare_value)) {
  54     if (ShenandoahSATBBarrier && !oopDesc::is_null(compare_value)) {
  55       ShenandoahBarrierSet::enqueue(compare_value);
  56     }
  57     if (UseShenandoahMatrix && ! oopDesc::is_null(new_value)) {
  58       ShenandoahConnectionMatrix* matrix = ShenandoahHeap::heap()->connection_matrix();
  59       matrix->set_connected(addr, new_value);
  60     }
  61   }
  62   return res;
  63 }
  64 
  65 template <DecoratorSet decorators, typename BarrierSetT>
  66 template <typename T>
  67 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap(oop new_value, T* addr) {
  68   oop previous = Raw::oop_atomic_xchg(new_value, addr);
  69   if (ShenandoahSATBBarrier) {
  70     if (!oopDesc::is_null(previous)) {
  71       ShenandoahBarrierSet::enqueue(previous);
  72     }
  73   }
  74   if (UseShenandoahMatrix && ! oopDesc::is_null(new_value)) {
  75     ShenandoahConnectionMatrix* matrix = ShenandoahHeap::heap()->connection_matrix();
  76     matrix->set_connected(addr, new_value);
  77   }
  78   return previous;
  79 }
  80 
  81 #endif //SHARE_VM_GC_SHENANDOAH_SHENANDOAHBARRIERSET_INLINE_HPP