1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/oops/typeArrayOop.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,143 @@
1.4 +/*
1.5 + * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// A typeArrayOop is an array containing basic types (non oop elements).
1.29 +// It is used for arrays of {characters, singles, doubles, bytes, shorts, integers, longs}
1.30 +#include <limits.h>
1.31 +
1.32 +class typeArrayOopDesc : public arrayOopDesc {
1.33 + protected:
1.34 + jchar* char_base() const { return (jchar*) base(T_CHAR); }
1.35 + jboolean* bool_base() const { return (jboolean*)base(T_BOOLEAN); }
1.36 + jbyte* byte_base() const { return (jbyte*) base(T_BYTE); }
1.37 + jint* int_base() const { return (jint*) base(T_INT); }
1.38 + jlong* long_base() const { return (jlong*) base(T_LONG); }
1.39 + jshort* short_base() const { return (jshort*) base(T_SHORT); }
1.40 + jfloat* float_base() const { return (jfloat*) base(T_FLOAT); }
1.41 + jdouble* double_base() const { return (jdouble*) base(T_DOUBLE); }
1.42 +
1.43 + friend class typeArrayKlass;
1.44 +
1.45 + public:
1.46 + jbyte* byte_at_addr(int which) const {
1.47 + assert(is_within_bounds(which), "index out of bounds");
1.48 + return &byte_base()[which];
1.49 + }
1.50 +
1.51 + jboolean* bool_at_addr(int which) const {
1.52 + assert(is_within_bounds(which), "index out of bounds");
1.53 + return &bool_base()[which];
1.54 + }
1.55 +
1.56 + jchar* char_at_addr(int which) const {
1.57 + assert(is_within_bounds(which), "index out of bounds");
1.58 + return &char_base()[which];
1.59 + }
1.60 +
1.61 + jint* int_at_addr(int which) const {
1.62 + assert(is_within_bounds(which), "index out of bounds");
1.63 + return &int_base()[which];
1.64 + }
1.65 +
1.66 + jshort* short_at_addr(int which) const {
1.67 + assert(is_within_bounds(which), "index out of bounds");
1.68 + return &short_base()[which];
1.69 + }
1.70 +
1.71 + jushort* ushort_at_addr(int which) const { // for field descriptor arrays
1.72 + assert(is_within_bounds(which), "index out of bounds");
1.73 + return (jushort*) &short_base()[which];
1.74 + }
1.75 +
1.76 + jlong* long_at_addr(int which) const {
1.77 + assert(is_within_bounds(which), "index out of bounds");
1.78 + return &long_base()[which];
1.79 + }
1.80 +
1.81 + jfloat* float_at_addr(int which) const {
1.82 + assert(is_within_bounds(which), "index out of bounds");
1.83 + return &float_base()[which];
1.84 + }
1.85 +
1.86 + jdouble* double_at_addr(int which) const {
1.87 + assert(is_within_bounds(which), "index out of bounds");
1.88 + return &double_base()[which];
1.89 + }
1.90 +
1.91 + jbyte byte_at(int which) const { return *byte_at_addr(which); }
1.92 + void byte_at_put(int which, jbyte contents) { *byte_at_addr(which) = contents; }
1.93 +
1.94 + jboolean bool_at(int which) const { return *bool_at_addr(which); }
1.95 + void bool_at_put(int which, jboolean contents) { *bool_at_addr(which) = contents; }
1.96 +
1.97 + jchar char_at(int which) const { return *char_at_addr(which); }
1.98 + void char_at_put(int which, jchar contents) { *char_at_addr(which) = contents; }
1.99 +
1.100 + jint int_at(int which) const { return *int_at_addr(which); }
1.101 + void int_at_put(int which, jint contents) { *int_at_addr(which) = contents; }
1.102 +
1.103 + jshort short_at(int which) const { return *short_at_addr(which); }
1.104 + void short_at_put(int which, jshort contents) { *short_at_addr(which) = contents; }
1.105 +
1.106 + jushort ushort_at(int which) const { return *ushort_at_addr(which); }
1.107 + void ushort_at_put(int which, jushort contents) { *ushort_at_addr(which) = contents; }
1.108 +
1.109 + jlong long_at(int which) const { return *long_at_addr(which); }
1.110 + void long_at_put(int which, jlong contents) { *long_at_addr(which) = contents; }
1.111 +
1.112 + jfloat float_at(int which) const { return *float_at_addr(which); }
1.113 + void float_at_put(int which, jfloat contents) { *float_at_addr(which) = contents; }
1.114 +
1.115 + jdouble double_at(int which) const { return *double_at_addr(which); }
1.116 + void double_at_put(int which, jdouble contents) { *double_at_addr(which) = contents; }
1.117 +
1.118 + jbyte byte_at_acquire(int which) const { return OrderAccess::load_acquire(byte_at_addr(which)); }
1.119 + void release_byte_at_put(int which, jbyte contents) { OrderAccess::release_store(byte_at_addr(which), contents); }
1.120 +
1.121 + // Sizing
1.122 +
1.123 + // Returns the number of words necessary to hold an array of "len"
1.124 + // elements each of the given "byte_size".
1.125 + private:
1.126 + static int object_size(int lh, int length) {
1.127 + int instance_header_size = Klass::layout_helper_header_size(lh);
1.128 + int element_shift = Klass::layout_helper_log2_element_size(lh);
1.129 + DEBUG_ONLY(BasicType etype = Klass::layout_helper_element_type(lh));
1.130 + assert(length <= arrayOopDesc::max_array_length(etype), "no overflow");
1.131 +
1.132 + julong size_in_bytes = length;
1.133 + size_in_bytes <<= element_shift;
1.134 + size_in_bytes += instance_header_size;
1.135 + julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize);
1.136 + assert(size_in_words <= (julong)max_jint, "no overflow");
1.137 +
1.138 + return align_object_size((intptr_t)size_in_words);
1.139 + }
1.140 +
1.141 + public:
1.142 + int object_size() {
1.143 + typeArrayKlass* tk = typeArrayKlass::cast(klass());
1.144 + return object_size(tk->layout_helper(), length());
1.145 + }
1.146 +};
