src/share/vm/oops/instanceOop.hpp

Fri, 11 Mar 2011 22:34:57 -0800

author
jrose
date
Fri, 11 Mar 2011 22:34:57 -0800
changeset 2639
8033953d67ff
parent 2314
f95d63e2154a
child 4037
da91efe96a93
permissions
-rw-r--r--

7012648: move JSR 292 to package java.lang.invoke and adjust names
Summary: package and class renaming only; delete unused methods and classes
Reviewed-by: twisti

     1 /*
     2  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    20  * or visit www.oracle.com if you need additional information or have any
    21  * questions.
    22  *
    23  */
    25 #ifndef SHARE_VM_OOPS_INSTANCEOOP_HPP
    26 #define SHARE_VM_OOPS_INSTANCEOOP_HPP
    28 #include "oops/oop.hpp"
    30 // An instanceOop is an instance of a Java Class
    31 // Evaluating "new HashTable()" will create an instanceOop.
    33 class instanceOopDesc : public oopDesc {
    34  public:
    35   // aligned header size.
    36   static int header_size() { return sizeof(instanceOopDesc)/HeapWordSize; }
    38   // If compressed, the offset of the fields of the instance may not be aligned.
    39   static int base_offset_in_bytes() {
    40     return UseCompressedOops ?
    41              klass_gap_offset_in_bytes() :
    42              sizeof(instanceOopDesc);
    43   }
    45   static bool contains_field_offset(int offset, int nonstatic_field_size) {
    46     int base_in_bytes = base_offset_in_bytes();
    47     return (offset >= base_in_bytes &&
    48             (offset-base_in_bytes) < nonstatic_field_size * heapOopSize);
    49   }
    50 };
    52 #endif // SHARE_VM_OOPS_INSTANCEOOP_HPP

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