jdk8-mips64-public/hotspot: src/share/vm/utilities/hashtable.inline.hpp@b84fd7d73702

     1 /*

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     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.

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     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

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    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

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    25 #ifndef SHARE_VM_UTILITIES_HASHTABLE_INLINE_HPP

    26 #define SHARE_VM_UTILITIES_HASHTABLE_INLINE_HPP

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

    29 #include "utilities/hashtable.hpp"

    30 #include "utilities/dtrace.hpp"

    32 // Inline function definitions for hashtable.hpp.

    34 // --------------------------------------------------------------------------

    36 // Initialize a table.

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

    39   // Called on startup, no locking needed

    40   initialize(table_size, entry_size, 0);

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

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

    43     _buckets[index].clear();

    44   }

    45 }

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

    49                                       HashtableBucket<F>* buckets,

    50                                       int number_of_entries) {

    51   // Called on startup, no locking needed

    52   initialize(table_size, entry_size, number_of_entries);

    53   _buckets = buckets;

    54 }

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

    58                                        int number_of_entries) {

    59   // Called on startup, no locking needed

    60   _table_size = table_size;

    61   _entry_size = entry_size;

    62   _free_list = NULL;

    63   _first_free_entry = NULL;

    64   _end_block = NULL;

    65   _number_of_entries = number_of_entries;

    66 #ifdef ASSERT

    67   _lookup_count = 0;

    68   _lookup_length = 0;

    69 #endif

    70 }

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

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

    75   return _buckets[i].get_entry();

    76 }

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

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

    81   //          without locks.  The new SystemDictionaryEntry must be

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

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

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

    85 }

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

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

    90   //          without locks.  The new SystemDictionaryEntry must be

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

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

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

    94 }

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

    98   _buckets[index].set_entry(entry);

    99 }

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

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

   104   _buckets[index].set_entry(entry);

   105   ++_number_of_entries;

   106 }

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

   109   entry->set_next(_free_list);

   110   _free_list = entry;

   111   --_number_of_entries;

   112 }

   114 #endif // SHARE_VM_UTILITIES_HASHTABLE_INLINE_HPP

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