1 /*
2 * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_HPP
27
28 #include "memory/genOopClosures.hpp"
29 #include "memory/padded.hpp"
30
31 // Closures for ParNewGeneration
32
33 class ParScanThreadState;
34 class ParNewGeneration;
35 typedef Padded<OopTaskQueue> ObjToScanQueue;
36 typedef GenericTaskQueueSet<ObjToScanQueue, mtGC> ObjToScanQueueSet;
37 class ParallelTaskTerminator;
38
39 class ParScanClosure: public OopsInKlassOrGenClosure {
40 protected:
41 ParScanThreadState* _par_scan_state;
42 ParNewGeneration* _g;
43 HeapWord* _boundary;
44 template <class T> void inline par_do_barrier(T* p);
45 template <class T> void inline do_oop_work(T* p,
46 bool gc_barrier,
47 bool root_scan);
48 public:
49 ParScanClosure() : OopsInKlassOrGenClosure(NULL) { }
50 ParScanClosure(ParNewGeneration* g, ParScanThreadState* par_scan_state);
51 };
52
53 class ParScanWithBarrierClosure: public ParScanClosure {
54 public:
55 ParScanWithBarrierClosure() {}
56 ParScanWithBarrierClosure(ParNewGeneration* g,
57 ParScanThreadState* par_scan_state) :
58 ParScanClosure(g, par_scan_state) {}
59 virtual void do_oop(oop* p);
60 virtual void do_oop(narrowOop* p);
61 inline void do_oop_nv(oop* p);
62 inline void do_oop_nv(narrowOop* p);
63 };
64
65 class ParScanWithoutBarrierClosure: public ParScanClosure {
66 public:
67 ParScanWithoutBarrierClosure() {}
68 ParScanWithoutBarrierClosure(ParNewGeneration* g,
69 ParScanThreadState* par_scan_state) :
70 ParScanClosure(g, par_scan_state) {}
71 virtual void do_oop(oop* p);
72 virtual void do_oop(narrowOop* p);
73 inline void do_oop_nv(oop* p);
74 inline void do_oop_nv(narrowOop* p);
75 };
76
77 class ParRootScanWithBarrierTwoGensClosure: public ParScanClosure {
78 public:
79 ParRootScanWithBarrierTwoGensClosure() {}
80 ParRootScanWithBarrierTwoGensClosure(ParNewGeneration* g,
81 ParScanThreadState* par_scan_state) :
82 ParScanClosure(g, par_scan_state) {}
83 virtual void do_oop(oop* p);
84 virtual void do_oop(narrowOop* p);
85 };
86
87 class ParRootScanWithoutBarrierClosure: public ParScanClosure {
88 public:
89 ParRootScanWithoutBarrierClosure() {}
90 ParRootScanWithoutBarrierClosure(ParNewGeneration* g,
91 ParScanThreadState* par_scan_state) :
92 ParScanClosure(g, par_scan_state) {}
93 virtual void do_oop(oop* p);
94 virtual void do_oop(narrowOop* p);
95 };
96
97 class ParScanWeakRefClosure: public ScanWeakRefClosure {
98 protected:
99 ParScanThreadState* _par_scan_state;
100 template <class T> inline void do_oop_work(T* p);
101 public:
102 ParScanWeakRefClosure() : ScanWeakRefClosure(NULL) {}
103 ParScanWeakRefClosure(ParNewGeneration* g,
104 ParScanThreadState* par_scan_state);
105 virtual void do_oop(oop* p);
106 virtual void do_oop(narrowOop* p);
107 inline void do_oop_nv(oop* p);
108 inline void do_oop_nv(narrowOop* p);
109 };
110
111 class ParEvacuateFollowersClosure: public VoidClosure {
112 private:
113 ParScanThreadState* _par_scan_state;
114 ParScanThreadState* par_scan_state() { return _par_scan_state; }
115
116 // We want to preserve the specific types here (rather than "OopClosure")
117 // for later de-virtualization of do_oop calls.
118 ParScanWithoutBarrierClosure* _to_space_closure;
119 ParScanWithoutBarrierClosure* to_space_closure() {
120 return _to_space_closure;
121 }
122 ParRootScanWithoutBarrierClosure* _to_space_root_closure;
123 ParRootScanWithoutBarrierClosure* to_space_root_closure() {
124 return _to_space_root_closure;
125 }
126
127 ParScanWithBarrierClosure* _old_gen_closure;
128 ParScanWithBarrierClosure* old_gen_closure () {
129 return _old_gen_closure;
130 }
131 ParRootScanWithBarrierTwoGensClosure* _old_gen_root_closure;
132 ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure () {
133 return _old_gen_root_closure;
134 }
135
136 ParNewGeneration* _par_gen;
137 ParNewGeneration* par_gen() { return _par_gen; }
138
139 ObjToScanQueueSet* _task_queues;
140 ObjToScanQueueSet* task_queues() { return _task_queues; }
141
142 ParallelTaskTerminator* _terminator;
143 ParallelTaskTerminator* terminator() { return _terminator; }
144 public:
145 ParEvacuateFollowersClosure() {}
146 ParEvacuateFollowersClosure(
147 ParScanThreadState* par_scan_state_,
148 ParScanWithoutBarrierClosure* to_space_closure_,
149 ParScanWithBarrierClosure* old_gen_closure_,
150 ParRootScanWithoutBarrierClosure* to_space_root_closure_,
151 ParNewGeneration* par_gen_,
152 ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure_,
153 ObjToScanQueueSet* task_queues_,
154 ParallelTaskTerminator* terminator_);
155 virtual void do_void();
156 };
157
158 #endif // SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_HPP