1 /* 2 * Copyright (c) 1997, 2010, 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 #ifndef SHARE_VM_OOPS_TYPEARRAYKLASS_HPP 26 #define SHARE_VM_OOPS_TYPEARRAYKLASS_HPP 27 28 #include "oops/arrayKlass.hpp" 29 30 // A typeArrayKlass is the klass of a typeArray 31 // It contains the type and size of the elements 32 33 class typeArrayKlass : public arrayKlass { 34 friend class VMStructs; 35 private: 36 jint _max_length; // maximum number of elements allowed in an array 37 public: 38 // instance variables 39 jint max_length() { return _max_length; } 40 void set_max_length(jint m) { _max_length = m; } 41 42 // testers 43 bool oop_is_typeArray_slow() const { return true; } 44 45 // klass allocation 46 DEFINE_ALLOCATE_PERMANENT(typeArrayKlass); 47 static klassOop create_klass(BasicType type, int scale, const char* name_str, 48 TRAPS); 49 static inline klassOop create_klass(BasicType type, int scale, TRAPS) { 50 return create_klass(type, scale, external_name(type), CHECK_NULL); 51 } 52 53 int oop_size(oop obj) const; 54 int klass_oop_size() const { return object_size(); } 55 56 bool compute_is_subtype_of(klassOop k); 57 58 // Allocation 59 typeArrayOop allocate_common(int length, bool nozero, TRAPS); 60 typeArrayOop allocate(int length, TRAPS) { return allocate_common(length, false, THREAD); } 61 typeArrayOop allocate_permanent(int length, TRAPS); // used for class file structures 62 oop multi_allocate(int rank, jint* sizes, TRAPS); 63 64 // Copying 65 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); 66 67 // Iteration 68 int oop_oop_iterate(oop obj, OopClosure* blk); 69 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); 70 71 // Garbage collection 72 void oop_follow_contents(oop obj); 73 int oop_adjust_pointers(oop obj); 74 75 // Parallel Scavenge and Parallel Old 76 PARALLEL_GC_DECLS 77 78 protected: 79 // Find n'th dimensional array 80 virtual klassOop array_klass_impl(bool or_null, int n, TRAPS); 81 82 // Returns the array class with this class as element type 83 virtual klassOop array_klass_impl(bool or_null, TRAPS); 84 85 public: 86 // Casting from klassOop 87 static typeArrayKlass* cast(klassOop k) { 88 assert(k->klass_part()->oop_is_typeArray_slow(), "cast to typeArrayKlass"); 89 return (typeArrayKlass*) k->klass_part(); 90 } 91 92 // Naming 93 static const char* external_name(BasicType type); 94 95 // Sizing 96 static int header_size() { return oopDesc::header_size() + sizeof(typeArrayKlass)/HeapWordSize; } 97 int object_size() const { return arrayKlass::object_size(header_size()); } 98 99 // Initialization (virtual from Klass) 100 void initialize(TRAPS); 101 102 private: 103 // Helpers 104 static klassOop array_klass_impl(typeArrayKlassHandle h_this, bool or_null, int n, TRAPS); 105 106 #ifndef PRODUCT 107 public: 108 // Printing 109 void oop_print_on(oop obj, outputStream* st); 110 #endif 111 public: 112 const char* internal_name() const; 113 }; 114 115 #endif // SHARE_VM_OOPS_TYPEARRAYKLASS_HPP