1/*
2 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
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_GC_EPSILON_EPSILONBARRIERSET_HPP
25#define SHARE_GC_EPSILON_EPSILONBARRIERSET_HPP
26
27#include "gc/shared/barrierSetAssembler.hpp"
28#include "gc/shared/barrierSet.hpp"
29
30// No interaction with application is required for Epsilon, and therefore
31// the barrier set is empty.
32class EpsilonBarrierSet: public BarrierSet {
33 friend class VMStructs;
34
35public:
36 EpsilonBarrierSet();
37
38 virtual void print_on(outputStream *st) const {}
39
40 virtual void on_thread_create(Thread* thread);
41 virtual void on_thread_destroy(Thread* thread);
42
43 template <DecoratorSet decorators, typename BarrierSetT = EpsilonBarrierSet>
44 class AccessBarrier: public BarrierSet::AccessBarrier<decorators, BarrierSetT> {};
45};
46
47template<>
48struct BarrierSet::GetName<EpsilonBarrierSet> {
49 static const BarrierSet::Name value = BarrierSet::EpsilonBarrierSet;
50};
51
52template<>
53struct BarrierSet::GetType<BarrierSet::EpsilonBarrierSet> {
54 typedef ::EpsilonBarrierSet type;
55};
56
57#endif // SHARE_GC_EPSILON_EPSILONBARRIERSET_HPP
58