jdk8-mips64-public/hotspot: src/share/vm/utilities/hashtable.inline.hpp@dc1769738300

     1 /*

     2  * Copyright (c) 2003, 2012, 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_UTILITIES_HASHTABLE_INLINE_HPP

    26 #define SHARE_VM_UTILITIES_HASHTABLE_INLINE_HPP

    28 #include "memory/allocation.inline.hpp"

    29 #include "runtime/orderAccess.inline.hpp"

    30 #include "utilities/hashtable.hpp"

    31 #include "utilities/dtrace.hpp"

    33 // Inline function definitions for hashtable.hpp.

    35 // --------------------------------------------------------------------------

    37 // Initialize a table.

    39 template <MEMFLAGS F> inline BasicHashtable<F>::BasicHashtable(int table_size, int entry_size) {

    40   // Called on startup, no locking needed

    41   initialize(table_size, entry_size, 0);

    42   _buckets = NEW_C_HEAP_ARRAY2(HashtableBucket<F>, table_size, F, CURRENT_PC);

    43   for (int index = 0; index < _table_size; index++) {

    44     _buckets[index].clear();

    45   }

    46 }

    49 template <MEMFLAGS F> inline BasicHashtable<F>::BasicHashtable(int table_size, int entry_size,

    50                                       HashtableBucket<F>* buckets,

    51                                       int number_of_entries) {

    52   // Called on startup, no locking needed

    53   initialize(table_size, entry_size, number_of_entries);

    54   _buckets = buckets;

    55 }

    58 template <MEMFLAGS F> inline void BasicHashtable<F>::initialize(int table_size, int entry_size,

    59                                        int number_of_entries) {

    60   // Called on startup, no locking needed

    61   _table_size = table_size;

    62   _entry_size = entry_size;

    63   _free_list = NULL;

    64   _first_free_entry = NULL;

    65   _end_block = NULL;

    66   _number_of_entries = number_of_entries;

    67 #ifdef ASSERT

    68   _lookup_count = 0;

    69   _lookup_length = 0;

    70 #endif

    71 }

    74 // The following method is MT-safe and may be used with caution.

    75 template <MEMFLAGS F> inline BasicHashtableEntry<F>* BasicHashtable<F>::bucket(int i) {

    76   return _buckets[i].get_entry();

    77 }

    80 template <MEMFLAGS F> inline void HashtableBucket<F>::set_entry(BasicHashtableEntry<F>* l) {

    81   // Warning: Preserve store ordering.  The SystemDictionary is read

    82   //          without locks.  The new SystemDictionaryEntry must be

    83   //          complete before other threads can be allowed to see it

    84   //          via a store to _buckets[index].

    85   OrderAccess::release_store_ptr(&_entry, l);

    86 }

    89 template <MEMFLAGS F> inline BasicHashtableEntry<F>* HashtableBucket<F>::get_entry() const {

    90   // Warning: Preserve load ordering.  The SystemDictionary is read

    91   //          without locks.  The new SystemDictionaryEntry must be

    92   //          complete before other threads can be allowed to see it

    93   //          via a store to _buckets[index].

    94   return (BasicHashtableEntry<F>*) OrderAccess::load_ptr_acquire(&_entry);

    95 }

    98 template <MEMFLAGS F> inline void BasicHashtable<F>::set_entry(int index, BasicHashtableEntry<F>* entry) {

    99   _buckets[index].set_entry(entry);

   100 }

   103 template <MEMFLAGS F> inline void BasicHashtable<F>::add_entry(int index, BasicHashtableEntry<F>* entry) {

   104   entry->set_next(bucket(index));

   105   _buckets[index].set_entry(entry);

   106   ++_number_of_entries;

   107 }

   109 template <MEMFLAGS F> inline void BasicHashtable<F>::free_entry(BasicHashtableEntry<F>* entry) {

   110   entry->set_next(_free_list);

   111   _free_list = entry;

   112   --_number_of_entries;

   113 }

   115 #endif // SHARE_VM_UTILITIES_HASHTABLE_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision