1 /*

     2  * Copyright 1997-2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

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

    21  * have any questions.

    22  *

    23  */

    24 

    25 // An objArrayOop is an array containing oops.

    26 // Evaluating "String arg[10]" will create an objArrayOop.

    27 

    28 class objArrayOopDesc : public arrayOopDesc {

    29  public:

    30   // Accessing

    31   oop obj_at(int index) const           { return *obj_at_addr(index);           }

    32   void obj_at_put(int index, oop value) { oop_store(obj_at_addr(index), value); }

    33   oop* base() const                     { return (oop*) arrayOopDesc::base(T_OBJECT); }

    34 

    35   // Sizing

    36   static int header_size()              { return arrayOopDesc::header_size(T_OBJECT); }

    37   static int object_size(int length)    { return align_object_size(header_size() + length); }

    38   int object_size()                     { return object_size(length()); }

    39 

    40   // Returns the address of the index'th element

    41   oop* obj_at_addr(int index) const {

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

    43     return &base()[index];

    44   }

    45 };