1 /* 2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * 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, const char* name_str, 43 TRAPS); 44 static inline klassOop create_klass(BasicType type, int scale, TRAPS) { 45 return create_klass(type, scale, external_name(type), CHECK_NULL); 46 } 47 48 int oop_size(oop obj) const; 49 int klass_oop_size() const { return object_size(); } 50 51 bool compute_is_subtype_of(klassOop k); 52 53 // Allocation 54 typeArrayOop allocate(int length, TRAPS); 55 typeArrayOop allocate_permanent(int length, TRAPS); // used for class file structures 56 oop multi_allocate(int rank, jint* sizes, TRAPS); 57 58 // Copying 59 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); 60 61 // Iteration 62 int oop_oop_iterate(oop obj, OopClosure* blk); 63 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); 64 65 // Garbage collection 66 void oop_follow_contents(oop obj); 67 int oop_adjust_pointers(oop obj); 68 69 // Parallel Scavenge and Parallel Old 70 PARALLEL_GC_DECLS 71 72 protected: 73 // Find n'th dimensional array 74 virtual klassOop array_klass_impl(bool or_null, int n, TRAPS); 75 76 // Returns the array class with this class as element type 77 virtual klassOop array_klass_impl(bool or_null, TRAPS); 78 79 public: 80 // Casting from klassOop 81 static typeArrayKlass* cast(klassOop k) { 82 assert(k->klass_part()->oop_is_typeArray_slow(), "cast to typeArrayKlass"); 83 return (typeArrayKlass*) k->klass_part(); 84 } 85 86 // Naming 87 static const char* external_name(BasicType type); 88 89 // Sizing 90 static int header_size() { return oopDesc::header_size() + sizeof(typeArrayKlass)/HeapWordSize; } 91 int object_size() const { return arrayKlass::object_size(header_size()); } 92 93 // Initialization (virtual from Klass) 94 void initialize(TRAPS); 95 96 private: 97 // Helpers 98 static klassOop array_klass_impl(typeArrayKlassHandle h_this, bool or_null, int n, TRAPS); 99 100 #ifndef PRODUCT 101 public: 102 // Printing 103 void oop_print_on(oop obj, outputStream* st); 104 #endif 105 public: 106 const char* internal_name() const; 107 };