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