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_SATBQUEUE_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_SATBQUEUE_HPP
27
28 #include "memory/allocation.hpp"
29 #include "gc_implementation/g1/ptrQueue.hpp"
30
31 class JavaThread;
32 class SATBMarkQueueSet;
33
34 // Base class for processing the contents of a SATB buffer.
35 class SATBBufferClosure : public StackObj {
36 protected:
37 ~SATBBufferClosure() { }
38
39 public:
40 // Process the SATB entries in the designated buffer range.
41 virtual void do_buffer(void** buffer, size_t size) = 0;
42 };
43
44 // A ptrQueue whose elements are "oops", pointers to object heads.
45 class ObjPtrQueue: public PtrQueue {
46 friend class SATBMarkQueueSet;
47
48 private:
49 // Filter out unwanted entries from the buffer.
103 void filter_thread_buffers();
104
105 // If there exists some completed buffer, pop and process it, and
106 // return true. Otherwise return false. Processing a buffer
107 // consists of applying the closure to the buffer range starting
108 // with the first non-NULL entry to the end of the buffer; the
109 // leading entries may be NULL due to filtering.
110 bool apply_closure_to_completed_buffer(SATBBufferClosure* cl);
111
112 #ifndef PRODUCT
113 // Helpful for debugging
114 void print_all(const char* msg);
115 #endif // PRODUCT
116
117 ObjPtrQueue* shared_satb_queue() { return &_shared_satb_queue; }
118
119 // If a marking is being abandoned, reset any unprocessed log buffers.
120 void abandon_partial_marking();
121 };
122
123 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_SATBQUEUE_HPP
|
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_G1_SATBQUEUE_HPP
26 #define SHARE_VM_GC_G1_SATBQUEUE_HPP
27
28 #include "gc/g1/ptrQueue.hpp"
29 #include "memory/allocation.hpp"
30
31 class JavaThread;
32 class SATBMarkQueueSet;
33
34 // Base class for processing the contents of a SATB buffer.
35 class SATBBufferClosure : public StackObj {
36 protected:
37 ~SATBBufferClosure() { }
38
39 public:
40 // Process the SATB entries in the designated buffer range.
41 virtual void do_buffer(void** buffer, size_t size) = 0;
42 };
43
44 // A ptrQueue whose elements are "oops", pointers to object heads.
45 class ObjPtrQueue: public PtrQueue {
46 friend class SATBMarkQueueSet;
47
48 private:
49 // Filter out unwanted entries from the buffer.
103 void filter_thread_buffers();
104
105 // If there exists some completed buffer, pop and process it, and
106 // return true. Otherwise return false. Processing a buffer
107 // consists of applying the closure to the buffer range starting
108 // with the first non-NULL entry to the end of the buffer; the
109 // leading entries may be NULL due to filtering.
110 bool apply_closure_to_completed_buffer(SATBBufferClosure* cl);
111
112 #ifndef PRODUCT
113 // Helpful for debugging
114 void print_all(const char* msg);
115 #endif // PRODUCT
116
117 ObjPtrQueue* shared_satb_queue() { return &_shared_satb_queue; }
118
119 // If a marking is being abandoned, reset any unprocessed log buffers.
120 void abandon_partial_marking();
121 };
122
123 #endif // SHARE_VM_GC_G1_SATBQUEUE_HPP
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