release/src/router/mysql/storage/ndb/include/kernel/RefConvert.hpp

   1 /* Copyright (c) 2003, 2005 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 REFCONVERT_H
  17 #define REFCONVERT_H
  18
  19 #include "kernel_types.h"
  20
  21 /**
  22  * Convert BlockReference to BlockNumber
  23  */
  24 inline
  25 BlockNumber refToBlock(BlockReference ref){
  26   return (BlockNumber)(ref >> 16);
  27 }
  28
  29 /**
  30  * Convert BlockReference to NodeId
  31  */
  32 inline
  33 NodeId refToNode(BlockReference ref){
  34   return (NodeId)(ref & 0xFFFF);
  35 }
  36
  37 /**
  38  * Convert NodeId and BlockNumber to BlockReference
  39  */
  40 inline
  41 BlockReference numberToRef(BlockNumber bnr, NodeId proc){
  42   return (((Uint32)bnr) << 16) + proc;
  43 }
  44
  45 #endif
  46