Mercurial > hg > truffle
comparison src/share/vm/memory/permGen.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c0492d52d55b |
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1 /* | |
2 * Copyright 2000-2005 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 // All heaps contains a "permanent generation," containing permanent | |
26 // (reflective) objects. This is like a regular generation in some ways, | |
27 // but unlike one in others, and so is split apart. | |
28 | |
29 class Generation; | |
30 class GenRemSet; | |
31 class CSpaceCounters; | |
32 | |
33 // PermGen models the part of the heap | |
34 | |
35 class PermGen : public CHeapObj { | |
36 friend class VMStructs; | |
37 protected: | |
38 size_t _capacity_expansion_limit; // maximum expansion allowed without a | |
39 // full gc occuring | |
40 | |
41 public: | |
42 enum Name { | |
43 MarkSweepCompact, MarkSweep, ConcurrentMarkSweep | |
44 }; | |
45 | |
46 // Permanent allocation (initialized) | |
47 virtual HeapWord* mem_allocate(size_t size) = 0; | |
48 | |
49 // Mark sweep support | |
50 virtual void compute_new_size() = 0; | |
51 | |
52 // Ideally, we would use MI (IMHO) but we'll do delegation instead. | |
53 virtual Generation* as_gen() const = 0; | |
54 | |
55 virtual void oop_iterate(OopClosure* cl) { | |
56 Generation* g = as_gen(); | |
57 assert(g != NULL, "as_gen() NULL"); | |
58 g->oop_iterate(cl); | |
59 } | |
60 | |
61 virtual void object_iterate(ObjectClosure* cl) { | |
62 Generation* g = as_gen(); | |
63 assert(g != NULL, "as_gen() NULL"); | |
64 g->object_iterate(cl); | |
65 } | |
66 | |
67 // Performance Counter support | |
68 virtual void update_counters() { | |
69 Generation* g = as_gen(); | |
70 assert(g != NULL, "as_gen() NULL"); | |
71 g->update_counters(); | |
72 } | |
73 }; |