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/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. 32 class EpsilonBarrierSet: public BarrierSet { 33 friend class VMStructs; 34 35 public: 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 47 template<> 48 struct BarrierSet::GetName<EpsilonBarrierSet> { 49 static const BarrierSet::Name value = BarrierSet::EpsilonBarrierSet; 50 }; 51 52 template<> 53 struct BarrierSet::GetType<BarrierSet::EpsilonBarrierSet> { 54 typedef ::EpsilonBarrierSet type; 55 }; 56 57 #endif // SHARE_VM_GC_EPSILON_BARRIERSET_HPP