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annotate src/share/vm/oops/typeArrayKlass.hpp @ 17524:89152779163c

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Merge with jdk8-b132
author Gilles Duboscq <duboscq@ssw.jku.at>
date Wed, 15 Oct 2014 11:59:32 +0200
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1 /*
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
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26 #define SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
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27
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28 #include "classfile/classLoaderData.hpp"
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29 #include "oops/arrayKlass.hpp"
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30
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31 // A TypeArrayKlass is the klass of a typeArray
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32 // It contains the type and size of the elements
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33
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34 class TypeArrayKlass : public ArrayKlass {
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35 friend class VMStructs;
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36 private:
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37 jint _max_length; // maximum number of elements allowed in an array
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38
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39 // Constructor
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40 TypeArrayKlass(BasicType type, Symbol* name);
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41 static TypeArrayKlass* allocate(ClassLoaderData* loader_data, BasicType type, Symbol* name, TRAPS);
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42 public:
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43 TypeArrayKlass() {} // For dummy objects.
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44
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45 // instance variables
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46 jint max_length() { return _max_length; }
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47 void set_max_length(jint m) { _max_length = m; }
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48
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49 // testers
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50 bool oop_is_typeArray_slow() const { return true; }
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51
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52 // klass allocation
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53 static TypeArrayKlass* create_klass(BasicType type, const char* name_str,
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54 TRAPS);
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55 static inline Klass* create_klass(BasicType type, int scale, TRAPS) {
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56 TypeArrayKlass* tak = create_klass(type, external_name(type), CHECK_NULL);
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57 assert(scale == (1 << tak->log2_element_size()), "scale must check out");
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58 return tak;
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59 }
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60
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61 int oop_size(oop obj) const;
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62
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63 bool compute_is_subtype_of(Klass* k);
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64
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65 // Allocation
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66 typeArrayOop allocate_common(int length, bool do_zero, TRAPS);
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67 typeArrayOop allocate(int length, TRAPS) { return allocate_common(length, true, THREAD); }
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68 oop multi_allocate(int rank, jint* sizes, TRAPS);
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69
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70 oop protection_domain() const { return NULL; }
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71
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72 // Copying
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73 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
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74
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75 // Iteration
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76 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk);
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77 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr);
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78
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79 // Garbage collection
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80 void oop_follow_contents(oop obj);
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81 int oop_adjust_pointers(oop obj);
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82
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83 // Parallel Scavenge and Parallel Old
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84 PARALLEL_GC_DECLS
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85
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86 protected:
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87 // Find n'th dimensional array
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88 virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);
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89
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90 // Returns the array class with this class as element type
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91 virtual Klass* array_klass_impl(bool or_null, TRAPS);
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92
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93 public:
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94 // Casting from Klass*
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95 static TypeArrayKlass* cast(Klass* k) {
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96 assert(k->oop_is_typeArray(), "cast to TypeArrayKlass");
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97 return (TypeArrayKlass*) k;
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98 }
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99
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100 // Naming
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101 static const char* external_name(BasicType type);
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102
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103 // Sizing
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104 static int header_size() { return sizeof(TypeArrayKlass)/HeapWordSize; }
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105 int size() const { return ArrayKlass::static_size(header_size()); }
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106
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107 // Initialization (virtual from Klass)
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108 void initialize(TRAPS);
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109
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110 public:
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111 // Printing
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112 #ifndef PRODUCT
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113 void oop_print_on(oop obj, outputStream* st);
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114 #endif
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115
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116 void print_on(outputStream* st) const;
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117 void print_value_on(outputStream* st) const;
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118
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119 public:
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120 const char* internal_name() const;
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121 };
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122
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123 #endif // SHARE_VM_OOPS_TYPEARRAYKLASS_HPP