release/src/router/mysql/storage/ndb/src/kernel/vm/KeyTable.hpp

   1 /* Copyright (c) 2003, 2005, 2006 MySQL AB
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; version 2 of the License.
   6
   7    This program is distributed in the hope that it will be useful,
   8    but WITHOUT ANY WARRANTY; without even the implied warranty of
   9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10    GNU General Public License for more details.
  11
  12    You should have received a copy of the GNU General Public License
  13    along with this program; if not, write to the Free Software
  14    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA */
  15
  16 #ifndef KEY_TABLE_HPP
  17 #define KEY_TABLE_HPP
  18
  19 #include <DLHashTable.hpp>
  20
  21 /**
  22  * KeyTable2 is DLHashTable2 with hardcoded Uint32 key named "key".
  23  */
  24 template <typename P, typename T>
  25 class KeyTableImpl : public DLHashTableImpl<P, T> {
  26 public:
  27   KeyTableImpl(P & pool) :
  28     DLHashTableImpl<P, T>(pool) {
  29   }
  30
  31   bool find(Ptr<T>& ptr, const T& rec) const {
  32     return DLHashTableImpl<P, T>::find(ptr, rec);
  33   }
  34
  35   bool find(Ptr<T>& ptr, Uint32 key) const {
  36     T rec;
  37     rec.key = key;
  38     return DLHashTableImpl<P, T>::find(ptr, rec);
  39   }
  40 };
  41
  42 // Specializations
  43
  44 template <typename T>
  45 class KeyTable : public KeyTableImpl<ArrayPool<T>, T>
  46 {
  47 public:
  48   KeyTable(ArrayPool<T> & p) : KeyTableImpl<ArrayPool<T>, T>(p) {}
  49 };
  50
  51 #endif