/*

 * Copyright (c) 2018, Oracle and/or its affiliates. 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.

 *

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 */

#ifndef SHARE_VM_OOPS_CONSTANTPOOL_INLINE_HPP

#define SHARE_VM_OOPS_CONSTANTPOOL_INLINE_HPP

#include "oops/constantPool.hpp"

#include "runtime/orderAccess.inline.hpp"

inline CPSlot ConstantPool::slot_at(int which) const {

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

  assert(!tag_at(which).is_unresolved_klass() && !tag_at(which).is_unresolved_klass_in_error(), "Corrupted constant pool");

  // Uses volatile because the klass slot changes without a lock.

  intptr_t adr = OrderAccess::load_acquire(obj_at_addr(which));

  assert(adr != 0 || which == 0, "cp entry for klass should not be zero");

  return CPSlot(adr);

}

inline Klass* ConstantPool::resolved_klass_at(int which) const {  // Used by Compiler

  guarantee(tag_at(which).is_klass(), "Corrupted constant pool");

  // Must do an acquire here in case another thread resolved the klass

  // behind our back, lest we later load stale values thru the oop.

  CPKlassSlot kslot = klass_slot_at(which);

  assert(tag_at(kslot.name_index()).is_symbol(), "sanity");

  Klass** adr = resolved_klasses()->adr_at(kslot.resolved_klass_index());

  return OrderAccess::load_acquire(adr);

}

inline bool ConstantPool::is_pseudo_string_at(int which) {

  assert(tag_at(which).is_string(), "Corrupted constant pool");

  return slot_at(which).is_pseudo_string();

}

inline oop ConstantPool::pseudo_string_at(int which, int obj_index) {

  assert(is_pseudo_string_at(which), "must be a pseudo-string");

  oop s = resolved_references()->obj_at(obj_index);

  return s;

}

inline oop ConstantPool::pseudo_string_at(int which) {

  assert(is_pseudo_string_at(which), "must be a pseudo-string");

  int obj_index = cp_to_object_index(which);

  oop s = resolved_references()->obj_at(obj_index);

  return s;

}

#endif // SHARE_VM_OOPS_CONSTANTPOOL_INLINE_HPP