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 // A G1RemSet provides ways of iterating over pointers into a selected
26 // collection set.
27
28 class G1CollectedHeap;
29 class CardTableModRefBarrierSet;
30 class ConcurrentG1Refine;
31
32 // A G1RemSet in which each heap region has a rem set that records the
33 // external heap references into it. Uses a mod ref bs to track updates,
34 // so that they can be used to update the individual region remsets.
35
36 class G1RemSet: public CHeapObj {
37 protected:
38 G1CollectedHeap* _g1;
39 unsigned _conc_refine_cards;
40 size_t n_workers();
41
42 protected:
43 enum SomePrivateConstants {
44 UpdateRStoMergeSync = 0,
198 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
199 virtual void do_oop(oop* p) { do_oop_work(p); }
200
201 // Override: this closure is idempotent.
202 // bool idempotent() { return true; }
203 bool apply_to_weak_ref_discovered_field() { return true; }
204 };
205
206 class UpdateRSetImmediate: public OopsInHeapRegionClosure {
207 private:
208 G1RemSet* _g1_rem_set;
209
210 template <class T> void do_oop_work(T* p);
211 public:
212 UpdateRSetImmediate(G1RemSet* rs) :
213 _g1_rem_set(rs) {}
214
215 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
216 virtual void do_oop( oop* p) { do_oop_work(p); }
217 };
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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_G1_G1REMSET_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_HPP
27
28 // A G1RemSet provides ways of iterating over pointers into a selected
29 // collection set.
30
31 class G1CollectedHeap;
32 class CardTableModRefBarrierSet;
33 class ConcurrentG1Refine;
34
35 // A G1RemSet in which each heap region has a rem set that records the
36 // external heap references into it. Uses a mod ref bs to track updates,
37 // so that they can be used to update the individual region remsets.
38
39 class G1RemSet: public CHeapObj {
40 protected:
41 G1CollectedHeap* _g1;
42 unsigned _conc_refine_cards;
43 size_t n_workers();
44
45 protected:
46 enum SomePrivateConstants {
47 UpdateRStoMergeSync = 0,
201 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
202 virtual void do_oop(oop* p) { do_oop_work(p); }
203
204 // Override: this closure is idempotent.
205 // bool idempotent() { return true; }
206 bool apply_to_weak_ref_discovered_field() { return true; }
207 };
208
209 class UpdateRSetImmediate: public OopsInHeapRegionClosure {
210 private:
211 G1RemSet* _g1_rem_set;
212
213 template <class T> void do_oop_work(T* p);
214 public:
215 UpdateRSetImmediate(G1RemSet* rs) :
216 _g1_rem_set(rs) {}
217
218 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
219 virtual void do_oop( oop* p) { do_oop_work(p); }
220 };
221
222 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_HPP
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