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_VM_GC_EPSILON_BARRIERSET_HPP 25 #define SHARE_VM_GC_EPSILON_BARRIERSET_HPP 26 27 #include "gc/shared/collectorPolicy.hpp" 28 #include "gc/shared/barrierSetAssembler.hpp" 29 #include "gc/shared/barrierSet.hpp" 30 31 // No interaction with application is required for Epsilon, and therefore 32 // the barrier set is empty. 33 class EpsilonBarrierSet: public BarrierSet { 34 friend class VMStructs; 35 36 public: 37 EpsilonBarrierSet() : BarrierSet(make_barrier_set_assembler<BarrierSetAssembler>(), BarrierSet::FakeRtti(BarrierSet::Epsilon)) {}; 38 virtual void print_on(outputStream *st) const {} 39 40 template <DecoratorSet decorators, typename BarrierSetT = EpsilonBarrierSet> 41 class AccessBarrier: public BarrierSet::AccessBarrier<decorators, BarrierSetT> {}; 42 }; 43 44 template<> 45 struct BarrierSet::GetName<EpsilonBarrierSet> { 46 static const BarrierSet::Name value = BarrierSet::Epsilon; 47 }; 48 49 template<> 50 struct BarrierSet::GetType<BarrierSet::Epsilon> { 51 typedef EpsilonBarrierSet type; 52 }; 53 54 #endif // SHARE_VM_GC_EPSILON_BARRIERSET_HPP