Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright 1997-2007 Sun Microsystems, Inc.  All Rights Reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

  * CA 95054 USA or visit www.sun.com if you need additional information or

  * have any questions.

  *

  */

 // A typeArrayOop is an array containing basic types (non oop elements).

 // It is used for arrays of {characters, singles, doubles, bytes, shorts, integers, longs}

 #include <limits.h>

 class typeArrayOopDesc : public arrayOopDesc {

  protected:

   jchar*    char_base()   const { return (jchar*)   base(T_CHAR); }

   jboolean* bool_base()   const { return (jboolean*)base(T_BOOLEAN); }

   jbyte*    byte_base()   const { return (jbyte*)   base(T_BYTE); }

   jint*     int_base()    const { return (jint*)    base(T_INT); }

   jlong*    long_base()   const { return (jlong*)   base(T_LONG); }

   jshort*   short_base()  const { return (jshort*)  base(T_SHORT); }

   jfloat*   float_base()  const { return (jfloat*)  base(T_FLOAT); }

   jdouble*  double_base() const { return (jdouble*) base(T_DOUBLE); }

   friend class typeArrayKlass;

  public:

   jbyte* byte_at_addr(int which) const {

     assert(is_within_bounds(which), "index out of bounds");

     return &byte_base()[which];

   }

   jboolean* bool_at_addr(int which) const {

     assert(is_within_bounds(which), "index out of bounds");

     return &bool_base()[which];

   }

   jchar* char_at_addr(int which) const {

     assert(is_within_bounds(which), "index out of bounds");

     return &char_base()[which];

   }

   jint* int_at_addr(int which) const {

     assert(is_within_bounds(which), "index out of bounds");

     return &int_base()[which];

   }

   jshort* short_at_addr(int which) const {

     assert(is_within_bounds(which), "index out of bounds");

     return &short_base()[which];

   }

   jushort* ushort_at_addr(int which) const {  // for field descriptor arrays

     assert(is_within_bounds(which), "index out of bounds");

     return (jushort*) &short_base()[which];

   }

   jlong* long_at_addr(int which) const {

     assert(is_within_bounds(which), "index out of bounds");

     return &long_base()[which];

   }

   jfloat* float_at_addr(int which) const {

     assert(is_within_bounds(which), "index out of bounds");

     return &float_base()[which];

   }

   jdouble* double_at_addr(int which) const {

     assert(is_within_bounds(which), "index out of bounds");

     return &double_base()[which];

   }

   jbyte byte_at(int which) const                  { return *byte_at_addr(which); }

   void byte_at_put(int which, jbyte contents)     { *byte_at_addr(which) = contents; }

   jboolean bool_at(int which) const               { return *bool_at_addr(which); }

   void bool_at_put(int which, jboolean contents)  { *bool_at_addr(which) = contents; }

   jchar char_at(int which) const                  { return *char_at_addr(which); }

   void char_at_put(int which, jchar contents)     { *char_at_addr(which) = contents; }

   jint int_at(int which) const                    { return *int_at_addr(which); }

   void int_at_put(int which, jint contents)       { *int_at_addr(which) = contents; }

   jshort short_at(int which) const                { return *short_at_addr(which); }

   void short_at_put(int which, jshort contents)   { *short_at_addr(which) = contents; }

   jushort ushort_at(int which) const              { return *ushort_at_addr(which); }

   void ushort_at_put(int which, jushort contents) { *ushort_at_addr(which) = contents; }

   jlong long_at(int which) const                  { return *long_at_addr(which); }

   void long_at_put(int which, jlong contents)     { *long_at_addr(which) = contents; }

   jfloat float_at(int which) const                { return *float_at_addr(which); }

   void float_at_put(int which, jfloat contents)   { *float_at_addr(which) = contents; }

   jdouble double_at(int which) const              { return *double_at_addr(which); }

   void double_at_put(int which, jdouble contents) { *double_at_addr(which) = contents; }

   jbyte byte_at_acquire(int which) const              { return OrderAccess::load_acquire(byte_at_addr(which)); }

   void release_byte_at_put(int which, jbyte contents) { OrderAccess::release_store(byte_at_addr(which), contents); }

   // Sizing

   // Returns the number of words necessary to hold an array of "len"

   // elements each of the given "byte_size".

  private:

   static int object_size(int lh, int length) {

     int instance_header_size = Klass::layout_helper_header_size(lh);

     int element_shift = Klass::layout_helper_log2_element_size(lh);

     DEBUG_ONLY(BasicType etype = Klass::layout_helper_element_type(lh));

     assert(length <= arrayOopDesc::max_array_length(etype), "no overflow");

     julong size_in_bytes = length;

     size_in_bytes <<= element_shift;

     size_in_bytes += instance_header_size;

     julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize);

     assert(size_in_words <= (julong)max_jint, "no overflow");

     return align_object_size((intptr_t)size_in_words);

   }

  public:

   int object_size() {

     typeArrayKlass* tk = typeArrayKlass::cast(klass());

     return object_size(tk->layout_helper(), length());

   }

 };