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_CIVALUEARRAYKLASS_HPP
  26 #define SHARE_VM_CI_CIVALUEARRAYKLASS_HPP
  27 
  28 #include "ci/ciArrayKlass.hpp"
  29 
  30 // ciValueArrayKlass
  31 //
  32 // This class represents a Klass* in the HotSpot virtual machine
  33 // whose Klass part is a ValueArrayKlass.
  34 class ciValueArrayKlass : public ciArrayKlass {
  35   CI_PACKAGE_ACCESS
  36   friend class ciEnv;
  37 
  38 private:
  39   ciKlass* _element_klass;
  40   ciKlass* _base_element_klass;
  41 
  42 protected:
  43   ciValueArrayKlass(Klass* h_k);
  44   ciValueArrayKlass(ciSymbol* array_name,
  45                     ciValueKlass* element_klass,
  46                     int dimension);
  47 
  48   ValueArrayKlass* get_ValueArrayKlass() {
  49     return (ValueArrayKlass*)get_Klass();
  50   }
  51 
  52   static ciValueArrayKlass* make_impl(ciKlass* element_klass);
  53   static ciSymbol* construct_array_name(ciSymbol* element_name,
  54                                         int       dimension);
  55 
  56   const char* type_string() { return "ciValueArrayKlass"; }
  57 
  58   oop     loader()        { return _base_element_klass->loader(); }
  59   jobject loader_handle() { return _base_element_klass->loader_handle(); }
  60 
  61   oop     protection_domain()        { return _base_element_klass->protection_domain(); }
  62   jobject protection_domain_handle() { return _base_element_klass->protection_domain_handle(); }
  63 
  64 
  65 public:
  66   // The one-level type of the array elements.
  67   ciKlass* element_klass();
  68 
  69   int log2_element_size() {
  70     return Klass::layout_helper_log2_element_size(layout_helper());
  71   }
  72   int element_byte_size() { return 1 << log2_element_size(); }
  73 
  74   // The innermost type of the array elements.
  75   ciKlass* base_element_klass() { return _base_element_klass; }
  76 
  77   // What kind of ciObject is this?
  78   bool is_value_array_klass() const { return true; }
  79 
  80   static ciValueArrayKlass* make(ciKlass* element_klass);
  81 
  82   virtual ciKlass* exact_klass();
  83 
  84   virtual bool can_be_value_array_klass() {
  85     return true;
  86   }
  87 };
  88 
  89 
  90 #endif // SHARE_VM_CI_CIVALUEARRAYKLASS_HPP