src/hotspot/share/gc/epsilon/epsilonBarrierSet.hpp

/*
 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * 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.
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#ifndef SHARE_GC_EPSILON_EPSILONBARRIERSET_HPP
#define SHARE_GC_EPSILON_EPSILONBARRIERSET_HPP

#include "gc/shared/barrierSet.hpp"

// No interaction with application is required for Epsilon, and therefore
// the barrier set is empty.
class EpsilonBarrierSet: public BarrierSet {
  friend class VMStructs;

public:
  EpsilonBarrierSet();

  virtual void print_on(outputStream *st) const {}

  virtual void on_thread_create(Thread* thread);
  virtual void on_thread_destroy(Thread* thread);

  template <DecoratorSet decorators, typename BarrierSetT = EpsilonBarrierSet>
  class AccessBarrier: public BarrierSet::AccessBarrier<decorators, BarrierSetT> {};
};

template<>
struct BarrierSet::GetName<EpsilonBarrierSet> {
  static const BarrierSet::Name value = BarrierSet::EpsilonBarrierSet;
};

template<>
struct BarrierSet::GetType<BarrierSet::EpsilonBarrierSet> {
  typedef ::EpsilonBarrierSet type;
};

#endif // SHARE_GC_EPSILON_EPSILONBARRIERSET_HPP