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comparison src/share/vm/gc_implementation/parallelScavenge/asPSYoungGen.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 class ASPSYoungGen : public PSYoungGen {
26 friend class VMStructs;
27 private:
28 size_t _gen_size_limit;
29 protected:
30 virtual size_t available_to_live();
31
32 public:
33 ASPSYoungGen(size_t initial_byte_size,
34 size_t minimum_byte_size,
35 size_t byte_size_limit);
36
37 ASPSYoungGen(PSVirtualSpace* vs,
38 size_t initial_byte_size,
39 size_t minimum_byte_size,
40 size_t byte_size_limit);
41
42 void initialize(ReservedSpace rs, size_t alignment);
43 void initialize_virtual_space(ReservedSpace rs, size_t alignment);
44
45 size_t gen_size_limit() { return _gen_size_limit; }
46 void set_gen_size_limit(size_t v) { _gen_size_limit = v; }
47
48 bool resize_generation(size_t eden_size, size_t survivor_size);
49 void resize_spaces(size_t eden_size, size_t survivor_size);
50
51 // Adjust eden to be consistent with the virtual space.
52 void reset_after_change();
53
54 // Adaptive size policy support
55 // Return number of bytes that the generation can expand/contract.
56 size_t available_for_expansion();
57 size_t available_for_contraction();
58
59 // Accessors
60 void set_reserved(MemRegion v) { _reserved = v; }
61
62 // Printing support
63 virtual const char* short_name() const { return "ASPSYoungGen"; }
64 };