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

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18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  *
23  */
24 
25 #ifndef SHARE_GC_EPSILON_EPSILONBARRIERSET_HPP
26 #define SHARE_GC_EPSILON_EPSILONBARRIERSET_HPP
27 
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_GC_EPSILON_EPSILONBARRIERSET_HPP

18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  *
23  */
24 
25 #ifndef SHARE_GC_EPSILON_EPSILONBARRIERSET_HPP
26 #define SHARE_GC_EPSILON_EPSILONBARRIERSET_HPP
27 
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   // Loom support
39   static constexpr bool is_concurrent_gc() { return false; }
40 
41   virtual void print_on(outputStream *st) const {}
42 
43   virtual void on_thread_create(Thread* thread);
44   virtual void on_thread_destroy(Thread* thread);
45 
46   template <DecoratorSet decorators, typename BarrierSetT = EpsilonBarrierSet>
47   class AccessBarrier: public BarrierSet::AccessBarrier<decorators, BarrierSetT> {};
48 };
49 
50 template<>
51 struct BarrierSet::GetName<EpsilonBarrierSet> {
52   static const BarrierSet::Name value = BarrierSet::EpsilonBarrierSet;
53 };
54 
55 template<>
56 struct BarrierSet::GetType<BarrierSet::EpsilonBarrierSet> {
57   typedef ::EpsilonBarrierSet type;
58 };
59 
60 #endif // SHARE_GC_EPSILON_EPSILONBARRIERSET_HPP
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