Mercurial > hg > truffle
annotate src/share/vm/oops/instanceRefKlass.hpp @ 2831:f072013daba9
Added lookup method.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Tue, 31 May 2011 11:32:48 +0200 |
parents | 7cf1a74771e8 |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OOPS_INSTANCEREFKLASS_HPP |
26 #define SHARE_VM_OOPS_INSTANCEREFKLASS_HPP | |
27 | |
28 #include "oops/instanceKlass.hpp" | |
29 | |
0 | 30 // An instanceRefKlass is a specialized instanceKlass for Java |
31 // classes that are subclasses of java/lang/ref/Reference. | |
32 // | |
33 // These classes are used to implement soft/weak/final/phantom | |
34 // references and finalization, and need special treatment by the | |
35 // garbage collector. | |
36 // | |
37 // During GC discovered reference objects are added (chained) to one | |
38 // of the four lists below, depending on the type of reference. | |
39 // The linked occurs through the next field in class java/lang/ref/Reference. | |
40 // | |
41 // Afterwards, the discovered references are processed in decreasing | |
42 // order of reachability. Reference objects eligible for notification | |
43 // are linked to the static pending_list in class java/lang/ref/Reference, | |
44 // and the pending list lock object in the same class is notified. | |
45 | |
46 | |
47 class instanceRefKlass: public instanceKlass { | |
48 public: | |
49 // Type testing | |
50 bool oop_is_instanceRef() const { return true; } | |
51 | |
52 // Casting from klassOop | |
53 static instanceRefKlass* cast(klassOop k) { | |
54 assert(k->klass_part()->oop_is_instanceRef(), "cast to instanceRefKlass"); | |
55 return (instanceRefKlass*) k->klass_part(); | |
56 } | |
57 | |
58 // allocation | |
59 DEFINE_ALLOCATE_PERMANENT(instanceRefKlass); | |
60 | |
61 // Garbage collection | |
62 int oop_adjust_pointers(oop obj); | |
63 void oop_follow_contents(oop obj); | |
64 | |
65 // Parallel Scavenge and Parallel Old | |
66 PARALLEL_GC_DECLS | |
67 | |
68 int oop_oop_iterate(oop obj, OopClosure* blk) { | |
69 return oop_oop_iterate_v(obj, blk); | |
70 } | |
71 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
72 return oop_oop_iterate_v_m(obj, blk, mr); | |
73 } | |
74 | |
75 #define InstanceRefKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ | |
76 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ | |
77 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr); | |
78 | |
79 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DECL) | |
342 | 80 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DECL) |
81 | |
82 #ifndef SERIALGC | |
83 #define InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ | |
84 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); | |
85 | |
86 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) | |
87 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) | |
88 #endif // !SERIALGC | |
0 | 89 |
90 static void release_and_notify_pending_list_lock(BasicLock *pending_list_basic_lock); | |
91 static void acquire_pending_list_lock(BasicLock *pending_list_basic_lock); | |
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92 static bool owns_pending_list_lock(JavaThread* thread); |
0 | 93 |
94 // Update non-static oop maps so 'referent', 'nextPending' and | |
95 // 'discovered' will look like non-oops | |
96 static void update_nonstatic_oop_maps(klassOop k); | |
97 | |
98 public: | |
99 // Verification | |
100 void oop_verify_on(oop obj, outputStream* st); | |
101 }; | |
1972 | 102 |
103 #endif // SHARE_VM_OOPS_INSTANCEREFKLASS_HPP |