--- /dev/null 2018-04-05 19:09:31.849588610 +0200 +++ new/src/hotspot/share/gc/epsilon/epsilonBarrierSet.hpp 2018-04-26 19:34:11.488224687 +0200 @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved. + * + * 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 + * questions. + * + */ + +#ifndef SHARE_VM_GC_EPSILON_BARRIERSET_HPP +#define SHARE_VM_GC_EPSILON_BARRIERSET_HPP + +#include "gc/shared/collectorPolicy.hpp" +#include "gc/shared/barrierSetAssembler.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() : BarrierSet(make_barrier_set_assembler(), BarrierSet::FakeRtti(BarrierSet::Epsilon)) {}; + virtual void print_on(outputStream *st) const {} + + template + class AccessBarrier: public BarrierSet::AccessBarrier {}; +}; + +template<> +struct BarrierSet::GetName { + static const BarrierSet::Name value = BarrierSet::Epsilon; +}; + +template<> +struct BarrierSet::GetType { + typedef EpsilonBarrierSet type; +}; + +#endif // SHARE_VM_GC_EPSILON_BARRIERSET_HPP