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by brian
clean slate |
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/* Copyright (C) 2000-2001, 2005 MySQL 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; version 2 of the License.
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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 USE_PRAGMA_INTERFACE
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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 char * name,uchar *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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uchar *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 char * name,uchar *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 char * name,uchar *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 char * name,uchar *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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uchar *map() |
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{
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return file->map; |
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}
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};
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