1 /*
2 * Copyright (c) 2003, 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_PARALLEL_ASPSOLDGEN_HPP
26 #define SHARE_VM_GC_PARALLEL_ASPSOLDGEN_HPP
27
28 #include "gc/parallel/mutableSpace.hpp"
29 #include "gc/parallel/objectStartArray.hpp"
30 #include "gc/parallel/psOldGen.hpp"
31 #include "gc/parallel/psVirtualspace.hpp"
32 #include "gc/parallel/psFileBackedVirtualspace.hpp"
33 #include "gc/parallel/spaceCounters.hpp"
34 #include "gc/shared/generationCounters.hpp"
35
36 class ASPSOldGen : public PSOldGen {
37 friend class VMStructs;
38 size_t _gen_size_limit; // Largest size the generation's reserved size
39 // can grow.
40 public:
41 ASPSOldGen(size_t initial_byte_size,
42 size_t minimum_byte_size,
43 size_t byte_size_limit,
44 const char* gen_name, int level);
45 ASPSOldGen(PSVirtualSpace* vs,
46 size_t initial_byte_size,
47 size_t minimum_byte_size,
48 size_t byte_size_limit,
49 const char* gen_name, int level);
50 size_t gen_size_limit() { return _gen_size_limit; }
51 size_t max_gen_size() { return _reserved.byte_size(); }
52 void set_gen_size_limit(size_t v) { _gen_size_limit = v; }
53
54 virtual void initialize_work(const char* perf_data_name, int level);
55
56 // After a shrink or expand reset the generation
57 void reset_after_change();
58
59 // Return number of bytes that the virtual space in the generation is willing
60 // to expand or contract. The results from these methods should feed into the
61 // decisions about adjusting the virtual space.
62 size_t available_for_expansion();
63 size_t available_for_contraction();
64
65 // Accessors
66 void set_reserved(MemRegion v) { _reserved = v; }
67
68 // Debugging support
69 virtual const char* short_name() const { return "ASPSOldGen"; }
70 };
71
72 #endif // SHARE_VM_GC_PARALLEL_ASPSOLDGEN_HPP
--- EOF ---