1 /*
2 * Copyright (c) 2001, 2014, 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_G1_PTRQUEUE_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_PTRQUEUE_HPP
27
28 #include "memory/allocation.hpp"
29 #include "utilities/sizes.hpp"
30
31 // There are various techniques that require threads to be able to log
32 // addresses. For example, a generational write barrier might log
33 // the addresses of modified old-generation objects. This type supports
34 // this operation.
35
36 // The definition of placement operator new(size_t, void*) in the <new>.
37 #include <new>
38
39 class PtrQueueSet;
40 class PtrQueue VALUE_OBJ_CLASS_SPEC {
41 friend class VMStructs;
42
43 protected:
44 // The ptr queue set to which this queue belongs.
45 PtrQueueSet* _qset;
46
299 int process_completed_threshold() const { return _process_completed_threshold; }
300
301 // Must only be called at a safe point. Indicates that the buffer free
302 // list size may be reduced, if that is deemed desirable.
303 void reduce_free_list();
304
305 int completed_buffers_num() { return _n_completed_buffers; }
306
307 void merge_bufferlists(PtrQueueSet* src);
308
309 void set_max_completed_queue(int m) { _max_completed_queue = m; }
310 int max_completed_queue() { return _max_completed_queue; }
311
312 void set_completed_queue_padding(int padding) { _completed_queue_padding = padding; }
313 int completed_queue_padding() { return _completed_queue_padding; }
314
315 // Notify the consumer if the number of buffers crossed the threshold
316 void notify_if_necessary();
317 };
318
319 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_PTRQUEUE_HPP
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1 /*
2 * Copyright (c) 2001, 2015, 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_G1_PTRQUEUE_HPP
26 #define SHARE_VM_GC_G1_PTRQUEUE_HPP
27
28 #include "memory/allocation.hpp"
29 #include "utilities/sizes.hpp"
30
31 // There are various techniques that require threads to be able to log
32 // addresses. For example, a generational write barrier might log
33 // the addresses of modified old-generation objects. This type supports
34 // this operation.
35
36 // The definition of placement operator new(size_t, void*) in the <new>.
37 #include <new>
38
39 class PtrQueueSet;
40 class PtrQueue VALUE_OBJ_CLASS_SPEC {
41 friend class VMStructs;
42
43 protected:
44 // The ptr queue set to which this queue belongs.
45 PtrQueueSet* _qset;
46
299 int process_completed_threshold() const { return _process_completed_threshold; }
300
301 // Must only be called at a safe point. Indicates that the buffer free
302 // list size may be reduced, if that is deemed desirable.
303 void reduce_free_list();
304
305 int completed_buffers_num() { return _n_completed_buffers; }
306
307 void merge_bufferlists(PtrQueueSet* src);
308
309 void set_max_completed_queue(int m) { _max_completed_queue = m; }
310 int max_completed_queue() { return _max_completed_queue; }
311
312 void set_completed_queue_padding(int padding) { _completed_queue_padding = padding; }
313 int completed_queue_padding() { return _completed_queue_padding; }
314
315 // Notify the consumer if the number of buffers crossed the threshold
316 void notify_if_necessary();
317 };
318
319 #endif // SHARE_VM_GC_G1_PTRQUEUE_HPP
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