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sql_map.h
Package: mysql-3.23.35.tar.gz [view]
Upload User: tsgydb
Upload Date: 2007-04-14
Package Size: 10674k
Code Size: 2k
Category:
MySQL
Development Platform:
Visual C++
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- /* interface for memory mapped files */
- #ifdef __GNUC__
- #pragma interface /* gcc class implementation */
- #endif
- class mapped_files;
- mapped_files *map_file(const my_string name,byte *magic,uint magic_length);
- void unmap_file(mapped_files *map);
- class mapped_files :public ilink {
- byte *map;
- ha_rows size;
- char *name; // name of mapped file
- File file; // >= 0 if open
- int error; // If not mapped
- uint use_count;
- public:
- mapped_files(const my_string name,byte *magic,uint magic_length);
- ~mapped_files();
- friend class mapped_file;
- friend mapped_files *map_file(const my_string name,byte *magic,
- uint magic_length);
- friend void unmap_file(mapped_files *map);
- };
- class mapped_file
- {
- mapped_files *file;
- public:
- mapped_file(const my_string name,byte *magic,uint magic_length)
- {
- file=map_file(name,magic,magic_length); /* old or new map */
- }
- ~mapped_file()
- {
- unmap_file(file); /* free map */
- }
- byte *map()
- {
- return file->map;
- }
- };