http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/mysql/raid.h

/* Copyright (C) 2000 MySQL 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; version 2 of the License. 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 */ /* Parser needs these defines always, even if USE_RAID is not defined */ #define RAID_TYPE_0 1 /* Striping */ #define RAID_TYPE_x 2 /* Some new modes */ #define RAID_TYPE_y 3 #define RAID_DEFAULT_CHUNKS 4 #define RAID_DEFAULT_CHUNKSIZE 256*1024 /* 256kB */ C_MODE_START #define my_raid_type(raid_type) raid_type_string[(int)(raid_type)] extern const char *raid_type_string[]; C_MODE_END #ifdef DONT_USE_RAID #undef USE_RAID #endif #if defined(USE_RAID) #include "my_dir.h" /* Trap all occurences of my_...() in source and use our wrapper around this function */ #ifdef MAP_TO_USE_RAID #define my_read(A,B,C,D) my_raid_read(A,B,C,D) #define my_write(A,B,C,D) my_raid_write(A,B,C,D) #define my_pwrite(A,B,C,D,E) my_raid_pwrite(A,B,C,D,E) #define my_pread(A,B,C,D,E) my_raid_pread(A,B,C,D,E) #define my_chsize(A,B,C,D) my_raid_chsize(A,B,C,D) #define my_close(A,B) my_raid_close(A,B) #define my_tell(A,B) my_raid_tell(A,B) #define my_seek(A,B,C,D) my_raid_seek(A,B,C,D) #define my_lock(A,B,C,D,E) my_raid_lock(A,B,C,D,E) #define my_fstat(A,B,C) my_raid_fstat(A,B,C) #endif /* MAP_TO_USE_RAID */ #ifdef __cplusplus extern "C" { #endif void init_raid(void); void end_raid(void); bool is_raid(File fd); File my_raid_create(const char *FileName, int CreateFlags, int access_flags, uint raid_type, uint raid_chunks, ulong raid_chunksize, myf MyFlags); File my_raid_open(const char *FileName, int Flags, uint raid_type, uint raid_chunks, ulong raid_chunksize, myf MyFlags); int my_raid_rename(const char *from, const char *to, uint raid_chunks, myf MyFlags); int my_raid_delete(const char *from, uint raid_chunks, myf MyFlags); int my_raid_redel(const char *old_name, const char *new_name, uint raid_chunks, myf MyFlags); my_off_t my_raid_seek(File fd, my_off_t pos, int whence, myf MyFlags); my_off_t my_raid_tell(File fd, myf MyFlags); uint my_raid_write(File,const byte *Buffer, uint Count, myf MyFlags); uint my_raid_read(File Filedes, byte *Buffer, uint Count, myf MyFlags); uint my_raid_pread(File Filedes, byte *Buffer, uint Count, my_off_t offset, myf MyFlags); uint my_raid_pwrite(int Filedes, const byte *Buffer, uint Count, my_off_t offset, myf MyFlags); int my_raid_lock(File,int locktype, my_off_t start, my_off_t length, myf MyFlags); int my_raid_chsize(File fd, my_off_t newlength, int filler, myf MyFlags); int my_raid_close(File, myf MyFlags); int my_raid_fstat(int Filedes, struct stat *buf, myf MyFlags); #ifdef __cplusplus } #ifdef USE_PRAGMA_INTERFACE #pragma interface /* gcc class implementation */ #endif class RaidName { public: RaidName(const char *FileName); ~RaidName(); bool IsRaid(); int Rename(const char * from, const char * to, myf MyFlags); private: uint _raid_type; /* RAID_TYPE_0 or RAID_TYPE_1 or RAID_TYPE_5 */ uint _raid_chunks; /* 1..n */ ulong _raid_chunksize; /* 1..n in bytes */ }; class RaidFd { public: RaidFd(uint raid_type, uint raid_chunks , ulong raid_chunksize); ~RaidFd(); File Create(const char *FileName, int CreateFlags, int access_flags, myf MyFlags); File Open(const char *FileName, int Flags, myf MyFlags); my_off_t Seek(my_off_t pos,int whence,myf MyFlags); my_off_t Tell(myf MyFlags); int Write(const byte *Buffer, uint Count, myf MyFlags); int Read(const byte *Buffer, uint Count, myf MyFlags); int Lock(int locktype, my_off_t start, my_off_t length, myf MyFlags); int Chsize(File fd, my_off_t newlength, int filler, myf MyFlags); int Fstat(int fd, MY_STAT *stat_area, myf MyFlags ); int Close(myf MyFlags); static bool IsRaid(File fd); static DYNAMIC_ARRAY _raid_map; /* Map of RaidFD* */ private: uint _raid_type; /* RAID_TYPE_0 or RAID_TYPE_1 or RAID_TYPE_5 */ uint _raid_chunks; /* 1..n */ ulong _raid_chunksize; /* 1..n in bytes */ ulong _total_block; /* We are operating with block no x (can be 0..many). */ uint _this_block; /* can be 0.._raid_chunks */ uint _remaining_bytes; /* Maximum bytes that can be written in this block */ my_off_t _position; my_off_t _size; /* Cached file size for faster seek(SEEK_END) */ File _fd; File *_fd_vector; /* Array of File */ off_t *_seek_vector; /* Array of cached seek positions */ inline void Calculate() { DBUG_ENTER("RaidFd::_Calculate"); DBUG_PRINT("info",("_position: %lu _raid_chunksize: %d, _size: %lu", (ulong) _position, _raid_chunksize, (ulong) _size)); _total_block = (ulong) (_position / _raid_chunksize); _this_block = _total_block % _raid_chunks; /* can be 0.._raid_chunks */ _remaining_bytes = (uint) (_raid_chunksize - (_position - _total_block * _raid_chunksize)); DBUG_PRINT("info", ("_total_block: %d this_block: %d _remaining_bytes:%d", _total_block, _this_block, _remaining_bytes)); DBUG_VOID_RETURN; } }; #endif /* __cplusplus */ #endif /* USE_RAID */