1 /*
   2  * Copyright (c) 2016, 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  */
  24 
  25 #ifndef SHARE_VM_CI_CIVALUEKLASS_HPP
  26 #define SHARE_VM_CI_CIVALUEKLASS_HPP
  27 
  28 #include "ci/ciConstantPoolCache.hpp"
  29 #include "ci/ciFlags.hpp"
  30 #include "ci/ciInstanceKlass.hpp"
  31 #include "ci/ciSymbol.hpp"
  32 
  33 // ciValueKlass
  34 //
  35 // Specialized ciInstanceKlass for value types.
  36 class ciValueKlass : public ciInstanceKlass {
  37   CI_PACKAGE_ACCESS
  38 
  39 protected:
  40   ciValueKlass(KlassHandle h_k) : ciInstanceKlass(h_k) {
  41     assert(is_final(), "ValueKlass must be final");
  42   };
  43 
  44 public:
  45   bool      is_valuetype() const { return true; }
  46 
  47   // Value type factory parameters
  48   int       param_count() const;
  49   int       param_size();
  50 
  51   // Value type fields
  52   //
  53   // The term index refers to the index in the VM's constant pool
  54   // (i.e., to the value returned by fieldDescriptor::index()).
  55   // Argument index refers to a field's index in the value factory
  56   // parameter mapping.
  57   int       field_index_for_argument(int arg_index);
  58   int       get_field_count() { return nof_nonstatic_fields(); }
  59   int       get_field_index_by_offset(int offset);
  60   int       get_field_offset_by_index(int index) const;
  61   ciType*   get_field_type_by_index(int index);
  62   int       get_first_field_offset() const;
  63 };
  64 
  65 #endif // SHARE_VM_CI_CIVALUEKLASS_HPP