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1 /*
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2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // A typeArrayKlass is the klass of a typeArray
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26 // It contains the type and size of the elements
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27
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28 class typeArrayKlass : public arrayKlass {
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29 friend class VMStructs;
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30 private:
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31 jint _max_length; // maximum number of elements allowed in an array
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32 public:
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33 // instance variables
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34 jint max_length() { return _max_length; }
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35 void set_max_length(jint m) { _max_length = m; }
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36
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37 // testers
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38 bool oop_is_typeArray_slow() const { return true; }
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39
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40 // klass allocation
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41 DEFINE_ALLOCATE_PERMANENT(typeArrayKlass);
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42 static klassOop create_klass(BasicType type, int scale, TRAPS);
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43
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44 int oop_size(oop obj) const;
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45 int klass_oop_size() const { return object_size(); }
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46
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47 bool compute_is_subtype_of(klassOop k);
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48
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49 // Allocation
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50 typeArrayOop allocate(int length, TRAPS);
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51 typeArrayOop allocate_permanent(int length, TRAPS); // used for class file structures
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52 oop multi_allocate(int rank, jint* sizes, TRAPS);
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53
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54 // Copying
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55 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
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56
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57 // Iteration
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58 int oop_oop_iterate(oop obj, OopClosure* blk);
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59 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
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60
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61 // Garbage collection
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62 void oop_follow_contents(oop obj);
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63 int oop_adjust_pointers(oop obj);
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64
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65 // Parallel Scavenge and Parallel Old
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66 PARALLEL_GC_DECLS
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67
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68 protected:
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69 // Find n'th dimensional array
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70 virtual klassOop array_klass_impl(bool or_null, int n, TRAPS);
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71
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72 // Returns the array class with this class as element type
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73 virtual klassOop array_klass_impl(bool or_null, TRAPS);
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74
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75 public:
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76 // Casting from klassOop
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77 static typeArrayKlass* cast(klassOop k) {
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78 assert(k->klass_part()->oop_is_typeArray_slow(), "cast to typeArrayKlass");
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79 return (typeArrayKlass*) k->klass_part();
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80 }
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81
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82 // Naming
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83 static const char* external_name(BasicType type);
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84
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85 // Sizing
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86 static int header_size() { return oopDesc::header_size() + sizeof(typeArrayKlass)/HeapWordSize; }
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87 int object_size() const { return arrayKlass::object_size(header_size()); }
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88
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89 // Initialization (virtual from Klass)
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90 void initialize(TRAPS);
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91
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92 private:
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93 // Helpers
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94 static klassOop array_klass_impl(typeArrayKlassHandle h_this, bool or_null, int n, TRAPS);
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95
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96 #ifndef PRODUCT
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97 public:
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98 // Printing
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99 void oop_print_on(oop obj, outputStream* st);
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100 #endif
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101 public:
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102 const char* internal_name() const;
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103 };
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