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comparison src/share/vm/oops/typeArrayKlass.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 1997-2007 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 // A typeArrayKlass is the klass of a typeArray
26 // It contains the type and size of the elements
27
28 class typeArrayKlass : public arrayKlass {
29 friend class VMStructs;
30 private:
31 jint _max_length; // maximum number of elements allowed in an array
32 public:
33 // instance variables
34 jint max_length() { return _max_length; }
35 void set_max_length(jint m) { _max_length = m; }
36
37 // testers
38 bool oop_is_typeArray_slow() const { return true; }
39
40 // klass allocation
41 DEFINE_ALLOCATE_PERMANENT(typeArrayKlass);
42 static klassOop create_klass(BasicType type, int scale, TRAPS);
43
44 int oop_size(oop obj) const;
45 int klass_oop_size() const { return object_size(); }
46
47 bool compute_is_subtype_of(klassOop k);
48
49 // Allocation
50 typeArrayOop allocate(int length, TRAPS);
51 typeArrayOop allocate_permanent(int length, TRAPS); // used for class file structures
52 oop multi_allocate(int rank, jint* sizes, TRAPS);
53
54 // Copying
55 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
56
57 // Iteration
58 int oop_oop_iterate(oop obj, OopClosure* blk);
59 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
60
61 // Garbage collection
62 void oop_follow_contents(oop obj);
63 int oop_adjust_pointers(oop obj);
64
65 // Parallel Scavenge and Parallel Old
66 PARALLEL_GC_DECLS
67
68 protected:
69 // Find n'th dimensional array
70 virtual klassOop array_klass_impl(bool or_null, int n, TRAPS);
71
72 // Returns the array class with this class as element type
73 virtual klassOop array_klass_impl(bool or_null, TRAPS);
74
75 public:
76 // Casting from klassOop
77 static typeArrayKlass* cast(klassOop k) {
78 assert(k->klass_part()->oop_is_typeArray_slow(), "cast to typeArrayKlass");
79 return (typeArrayKlass*) k->klass_part();
80 }
81
82 // Naming
83 static const char* external_name(BasicType type);
84
85 // Sizing
86 static int header_size() { return oopDesc::header_size() + sizeof(typeArrayKlass)/HeapWordSize; }
87 int object_size() const { return arrayKlass::object_size(header_size()); }
88
89 // Initialization (virtual from Klass)
90 void initialize(TRAPS);
91
92 private:
93 // Helpers
94 static klassOop array_klass_impl(typeArrayKlassHandle h_this, bool or_null, int n, TRAPS);
95
96 #ifndef PRODUCT
97 public:
98 // Printing
99 void oop_print_on(oop obj, outputStream* st);
100 #endif
101 public:
102 const char* internal_name() const;
103 };