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src/share/vm/oops/typeArrayOop.hpp@624a0741915c (annotated)

src/share/vm/oops/typeArrayOop.hpp

Thu, 04 Apr 2019 17:56:29 +0800

author

aoqi

date

Thu, 04 Apr 2019 17:56:29 +0800

changeset 9572

624a0741915c

parent 9448

73d689add964

permissions

-rw-r--r--

Merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2012, 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_TYPEARRAYOOP_HPP
aoqi@0	26	#define SHARE_VM_OOPS_TYPEARRAYOOP_HPP
aoqi@0	27
aoqi@0	28	#include "oops/arrayOop.hpp"
aoqi@0	29	#include "oops/typeArrayKlass.hpp"
goetz@6911	30	#include "runtime/orderAccess.inline.hpp"
aoqi@0	31
aoqi@0	32	// A typeArrayOop is an array containing basic types (non oop elements).
aoqi@0	33	// It is used for arrays of {characters, singles, doubles, bytes, shorts, integers, longs}
aoqi@0	34	#include <limits.h>
aoqi@0	35
aoqi@0	36	class typeArrayOopDesc : public arrayOopDesc {
aoqi@0	37	protected:
aoqi@0	38	jchar* char_base() const { return (jchar*) base(T_CHAR); }
aoqi@0	39	jboolean* bool_base() const { return (jboolean*)base(T_BOOLEAN); }
aoqi@0	40	jbyte* byte_base() const { return (jbyte*) base(T_BYTE); }
aoqi@0	41	jint* int_base() const { return (jint*) base(T_INT); }
aoqi@0	42	jlong* long_base() const { return (jlong*) base(T_LONG); }
aoqi@0	43	jshort* short_base() const { return (jshort*) base(T_SHORT); }
aoqi@0	44	jfloat* float_base() const { return (jfloat*) base(T_FLOAT); }
aoqi@0	45	jdouble* double_base() const { return (jdouble*) base(T_DOUBLE); }
aoqi@0	46
aoqi@0	47	friend class TypeArrayKlass;
aoqi@0	48
aoqi@0	49	public:
aoqi@0	50	jbyte* byte_at_addr(int which) const {
aoqi@0	51	assert(is_within_bounds(which), "index out of bounds");
aoqi@0	52	return &byte_base()[which];
aoqi@0	53	}
aoqi@0	54
aoqi@0	55	jboolean* bool_at_addr(int which) const {
aoqi@0	56	assert(is_within_bounds(which), "index out of bounds");
aoqi@0	57	return &bool_base()[which];
aoqi@0	58	}
aoqi@0	59
aoqi@0	60	jchar* char_at_addr(int which) const {
aoqi@0	61	assert(is_within_bounds(which), "index out of bounds");
aoqi@0	62	return &char_base()[which];
aoqi@0	63	}
aoqi@0	64
aoqi@0	65	jint* int_at_addr(int which) const {
aoqi@0	66	assert(is_within_bounds(which), "index out of bounds");
aoqi@0	67	return &int_base()[which];
aoqi@0	68	}
aoqi@0	69
aoqi@0	70	jshort* short_at_addr(int which) const {
aoqi@0	71	assert(is_within_bounds(which), "index out of bounds");
aoqi@0	72	return &short_base()[which];
aoqi@0	73	}
aoqi@0	74
aoqi@0	75	jushort* ushort_at_addr(int which) const { // for field descriptor arrays
aoqi@0	76	assert(is_within_bounds(which), "index out of bounds");
aoqi@0	77	return (jushort*) &short_base()[which];
aoqi@0	78	}
aoqi@0	79
aoqi@0	80	jlong* long_at_addr(int which) const {
aoqi@0	81	assert(is_within_bounds(which), "index out of bounds");
aoqi@0	82	return &long_base()[which];
aoqi@0	83	}
aoqi@0	84
aoqi@0	85	jfloat* float_at_addr(int which) const {
aoqi@0	86	assert(is_within_bounds(which), "index out of bounds");
aoqi@0	87	return &float_base()[which];
aoqi@0	88	}
aoqi@0	89
aoqi@0	90	jdouble* double_at_addr(int which) const {
aoqi@0	91	assert(is_within_bounds(which), "index out of bounds");
aoqi@0	92	return &double_base()[which];
aoqi@0	93	}
aoqi@0	94
aoqi@0	95	jbyte byte_at(int which) const { return *byte_at_addr(which); }
aoqi@0	96	void byte_at_put(int which, jbyte contents) { *byte_at_addr(which) = contents; }
aoqi@0	97
aoqi@0	98	jboolean bool_at(int which) const { return *bool_at_addr(which); }
coleenp@8396	99	void bool_at_put(int which, jboolean contents) { *bool_at_addr(which) = (((jint)contents) & 1); }
aoqi@0	100
aoqi@0	101	jchar char_at(int which) const { return *char_at_addr(which); }
aoqi@0	102	void char_at_put(int which, jchar contents) { *char_at_addr(which) = contents; }
aoqi@0	103
aoqi@0	104	jint int_at(int which) const { return *int_at_addr(which); }
aoqi@0	105	void int_at_put(int which, jint contents) { *int_at_addr(which) = contents; }
aoqi@0	106
aoqi@0	107	jshort short_at(int which) const { return *short_at_addr(which); }
aoqi@0	108	void short_at_put(int which, jshort contents) { *short_at_addr(which) = contents; }
aoqi@0	109
aoqi@0	110	jushort ushort_at(int which) const { return *ushort_at_addr(which); }
aoqi@0	111	void ushort_at_put(int which, jushort contents) { *ushort_at_addr(which) = contents; }
aoqi@0	112
aoqi@0	113	jlong long_at(int which) const { return *long_at_addr(which); }
aoqi@0	114	void long_at_put(int which, jlong contents) { *long_at_addr(which) = contents; }
aoqi@0	115
aoqi@0	116	jfloat float_at(int which) const { return *float_at_addr(which); }
aoqi@0	117	void float_at_put(int which, jfloat contents) { *float_at_addr(which) = contents; }
aoqi@0	118
aoqi@0	119	jdouble double_at(int which) const { return *double_at_addr(which); }
aoqi@0	120	void double_at_put(int which, jdouble contents) { *double_at_addr(which) = contents; }
aoqi@0	121
aoqi@0	122	jbyte byte_at_acquire(int which) const { return OrderAccess::load_acquire(byte_at_addr(which)); }
aoqi@0	123	void release_byte_at_put(int which, jbyte contents) { OrderAccess::release_store(byte_at_addr(which), contents); }
aoqi@0	124
aoqi@0	125	// Java thinks metadata arrays are just arrays of either long or int, since
aoqi@0	126	// there doesn't seem to be T_ADDRESS, so this is a bit of unfortunate
aoqi@0	127	// casting
aoqi@0	128	#ifdef _LP64
aoqi@0	129	Metadata* metadata_at(int which) const {
aoqi@0	130	return (Metadata*)*long_at_addr(which); }
aoqi@0	131	void metadata_at_put(int which, Metadata* contents) {
kbarrett@9324	132	*long_at_addr(which) = (jlong)contents;
aoqi@0	133	}
aoqi@0	134	#else
aoqi@0	135	Metadata* metadata_at(int which) const {
aoqi@0	136	return (Metadata*)*int_at_addr(which); }
aoqi@0	137	void metadata_at_put(int which, Metadata* contents) {
aoqi@0	138	*int_at_addr(which) = (int)contents;
aoqi@0	139	}
aoqi@0	140	#endif // _LP64
aoqi@0	141
aoqi@0	142	// Sizing
aoqi@0	143
aoqi@0	144	// Returns the number of words necessary to hold an array of "len"
aoqi@0	145	// elements each of the given "byte_size".
aoqi@0	146	private:
aoqi@0	147	static int object_size(int lh, int length) {
aoqi@0	148	int instance_header_size = Klass::layout_helper_header_size(lh);
aoqi@0	149	int element_shift = Klass::layout_helper_log2_element_size(lh);
aoqi@0	150	DEBUG_ONLY(BasicType etype = Klass::layout_helper_element_type(lh));
aoqi@0	151	assert(length <= arrayOopDesc::max_array_length(etype), "no overflow");
aoqi@0	152
kvn@7293	153	julong size_in_bytes = (juint)length;
aoqi@0	154	size_in_bytes <<= element_shift;
aoqi@0	155	size_in_bytes += instance_header_size;
aoqi@0	156	julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize);
aoqi@0	157	assert(size_in_words <= (julong)max_jint, "no overflow");
aoqi@0	158
aoqi@0	159	return align_object_size((intptr_t)size_in_words);
aoqi@0	160	}
aoqi@0	161
aoqi@0	162	public:
aoqi@0	163	int object_size() {
aoqi@0	164	TypeArrayKlass* tk = TypeArrayKlass::cast(klass());
aoqi@0	165	return object_size(tk->layout_helper(), length());
aoqi@0	166	}
aoqi@0	167	};
aoqi@0	168
aoqi@0	169	#endif // SHARE_VM_OOPS_TYPEARRAYOOP_HPP