hotspot/src/share/vm/utilities/hashtable.inline.hpp
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6995781: Native Memory Tracking (Phase 1) 7151532: DCmd for hotspot native memory tracking Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd Reviewed-by: acorn, coleenp, fparain
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/*
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 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_UTILITIES_HASHTABLE_INLINE_HPP
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#define SHARE_VM_UTILITIES_HASHTABLE_INLINE_HPP
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#include "memory/allocation.inline.hpp"
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#include "utilities/hashtable.hpp"
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#include "utilities/dtrace.hpp"
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// Inline function definitions for hashtable.hpp.
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// --------------------------------------------------------------------------
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// Initialize a table.
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template <MEMFLAGS F> inline BasicHashtable<F>::BasicHashtable(int table_size, int entry_size) {
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  // Called on startup, no locking needed
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  initialize(table_size, entry_size, 0);
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  _buckets = NEW_C_HEAP_ARRAY2(HashtableBucket<F>, table_size, F, CURRENT_PC);
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  for (int index = 0; index < _table_size; index++) {
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    _buckets[index].clear();
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  }
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}
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template <MEMFLAGS F> inline BasicHashtable<F>::BasicHashtable(int table_size, int entry_size,
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                                      HashtableBucket<F>* buckets,
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                                      int number_of_entries) {
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  // Called on startup, no locking needed
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  initialize(table_size, entry_size, number_of_entries);
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  _buckets = buckets;
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}
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template <MEMFLAGS F> inline void BasicHashtable<F>::initialize(int table_size, int entry_size,
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                                       int number_of_entries) {
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  // Called on startup, no locking needed
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  _table_size = table_size;
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  _entry_size = entry_size;
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  _free_list = NULL;
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  _first_free_entry = NULL;
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  _end_block = NULL;
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  _number_of_entries = number_of_entries;
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#ifdef ASSERT
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  _lookup_count = 0;
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  _lookup_length = 0;
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#endif
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}
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// The following method is MT-safe and may be used with caution.
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template <MEMFLAGS F> inline BasicHashtableEntry<F>* BasicHashtable<F>::bucket(int i) {
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  return _buckets[i].get_entry();
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}
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template <MEMFLAGS F> inline void HashtableBucket<F>::set_entry(BasicHashtableEntry<F>* l) {
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  // Warning: Preserve store ordering.  The SystemDictionary is read
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  //          without locks.  The new SystemDictionaryEntry must be
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  //          complete before other threads can be allowed to see it
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  //          via a store to _buckets[index].
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  OrderAccess::release_store_ptr(&_entry, l);
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}
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template <MEMFLAGS F> inline BasicHashtableEntry<F>* HashtableBucket<F>::get_entry() const {
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  // Warning: Preserve load ordering.  The SystemDictionary is read
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  //          without locks.  The new SystemDictionaryEntry must be
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  //          complete before other threads can be allowed to see it
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  //          via a store to _buckets[index].
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  return (BasicHashtableEntry<F>*) OrderAccess::load_ptr_acquire(&_entry);
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}
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template <MEMFLAGS F> inline void BasicHashtable<F>::set_entry(int index, BasicHashtableEntry<F>* entry) {
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  _buckets[index].set_entry(entry);
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}
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template <MEMFLAGS F> inline void BasicHashtable<F>::add_entry(int index, BasicHashtableEntry<F>* entry) {
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  entry->set_next(bucket(index));
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  _buckets[index].set_entry(entry);
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  ++_number_of_entries;
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}
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template <MEMFLAGS F> inline void BasicHashtable<F>::free_entry(BasicHashtableEntry<F>* entry) {
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  entry->set_next(_free_list);
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  _free_list = entry;
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  --_number_of_entries;
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}
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#endif // SHARE_VM_UTILITIES_HASHTABLE_INLINE_HPP