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Diffstat (limited to '3rdparty/mysql/include/raid.h')
| -rw-r--r-- | 3rdparty/mysql/include/raid.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/3rdparty/mysql/include/raid.h b/3rdparty/mysql/include/raid.h new file mode 100644 index 000000000..c840afcba --- /dev/null +++ b/3rdparty/mysql/include/raid.h @@ -0,0 +1,159 @@ +/* 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; 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 */ + +/* 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 */ |