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src/share/vm/oops/typeArrayKlass.hpp@710a3c8b516e (annotated)

src/share/vm/oops/typeArrayKlass.hpp

Tue, 08 Aug 2017 15:57:29 +0800

author

aoqi

date

Tue, 08 Aug 2017 15:57:29 +0800

changeset 6876

710a3c8b516e

parent 6198

55fb97c4c58d

parent 0

f90c822e73f8

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
aoqi@0	26	#define SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
aoqi@0	27
aoqi@0	28	#include "classfile/classLoaderData.hpp"
aoqi@0	29	#include "oops/arrayKlass.hpp"
aoqi@0	30
aoqi@0	31	// A TypeArrayKlass is the klass of a typeArray
aoqi@0	32	// It contains the type and size of the elements
aoqi@0	33
aoqi@0	34	class TypeArrayKlass : public ArrayKlass {
aoqi@0	35	friend class VMStructs;
aoqi@0	36	private:
aoqi@0	37	jint _max_length; // maximum number of elements allowed in an array
aoqi@0	38
aoqi@0	39	// Constructor
aoqi@0	40	TypeArrayKlass(BasicType type, Symbol* name);
aoqi@0	41	static TypeArrayKlass* allocate(ClassLoaderData* loader_data, BasicType type, Symbol* name, TRAPS);
aoqi@0	42	public:
aoqi@0	43	TypeArrayKlass() {} // For dummy objects.
aoqi@0	44
aoqi@0	45	// instance variables
aoqi@0	46	jint max_length() { return _max_length; }
aoqi@0	47	void set_max_length(jint m) { _max_length = m; }
aoqi@0	48
aoqi@0	49	// testers
aoqi@0	50	bool oop_is_typeArray_slow() const { return true; }
aoqi@0	51
aoqi@0	52	// klass allocation
aoqi@0	53	static TypeArrayKlass* create_klass(BasicType type, const char* name_str,
aoqi@0	54	TRAPS);
aoqi@0	55	static inline Klass* create_klass(BasicType type, int scale, TRAPS) {
aoqi@0	56	TypeArrayKlass* tak = create_klass(type, external_name(type), CHECK_NULL);
aoqi@0	57	assert(scale == (1 << tak->log2_element_size()), "scale must check out");
aoqi@0	58	return tak;
aoqi@0	59	}
aoqi@0	60
aoqi@0	61	int oop_size(oop obj) const;
aoqi@0	62
aoqi@0	63	bool compute_is_subtype_of(Klass* k);
aoqi@0	64
aoqi@0	65	// Allocation
aoqi@0	66	typeArrayOop allocate_common(int length, bool do_zero, TRAPS);
aoqi@0	67	typeArrayOop allocate(int length, TRAPS) { return allocate_common(length, true, THREAD); }
aoqi@0	68	oop multi_allocate(int rank, jint* sizes, TRAPS);
aoqi@0	69
aoqi@0	70	oop protection_domain() const { return NULL; }
aoqi@0	71
aoqi@0	72	// Copying
aoqi@0	73	void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
aoqi@0	74
aoqi@0	75	// Iteration
aoqi@0	76	int oop_oop_iterate(oop obj, ExtendedOopClosure* blk);
aoqi@0	77	int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr);
aoqi@0	78
aoqi@0	79	// Garbage collection
aoqi@0	80	void oop_follow_contents(oop obj);
aoqi@0	81	int oop_adjust_pointers(oop obj);
aoqi@0	82
aoqi@0	83	// Parallel Scavenge and Parallel Old
aoqi@0	84	PARALLEL_GC_DECLS
aoqi@0	85
aoqi@0	86	protected:
aoqi@0	87	// Find n'th dimensional array
aoqi@0	88	virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);
aoqi@0	89
aoqi@0	90	// Returns the array class with this class as element type
aoqi@0	91	virtual Klass* array_klass_impl(bool or_null, TRAPS);
aoqi@0	92
aoqi@0	93	public:
aoqi@0	94	// Casting from Klass*
aoqi@0	95	static TypeArrayKlass* cast(Klass* k) {
aoqi@0	96	assert(k->oop_is_typeArray(), "cast to TypeArrayKlass");
aoqi@0	97	return (TypeArrayKlass*) k;
aoqi@0	98	}
aoqi@0	99
aoqi@0	100	// Naming
aoqi@0	101	static const char* external_name(BasicType type);
aoqi@0	102
aoqi@0	103	// Sizing
aoqi@0	104	static int header_size() { return sizeof(TypeArrayKlass)/HeapWordSize; }
aoqi@0	105	int size() const { return ArrayKlass::static_size(header_size()); }
aoqi@0	106
aoqi@0	107	// Initialization (virtual from Klass)
aoqi@0	108	void initialize(TRAPS);
aoqi@0	109
aoqi@0	110	public:
aoqi@0	111	// Printing
aoqi@0	112	#ifndef PRODUCT
aoqi@0	113	void oop_print_on(oop obj, outputStream* st);
aoqi@0	114	#endif
aoqi@0	115
aoqi@0	116	void print_on(outputStream* st) const;
aoqi@0	117	void print_value_on(outputStream* st) const;
aoqi@0	118
aoqi@0	119	public:
aoqi@0	120	const char* internal_name() const;
aoqi@0	121	};
aoqi@0	122
aoqi@0	123	#endif // SHARE_VM_OOPS_TYPEARRAYKLASS_HPP