From: MySQL Team Date: Tue, 22 Aug 2000 12:10:53 +0000 (+0000) Subject: Interface for 'raid' files (ont in use by PHP) X-Git-Tag: PRE_LIBMYSQL_REVERT~1 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3c049ddcdd7a80f3a27d4305ce5e9aaf8a393981;p=php Interface for 'raid' files (ont in use by PHP) --- diff --git a/ext/mysql/libmysql/raid.h b/ext/mysql/libmysql/raid.h new file mode 100644 index 0000000000..119f2b9b3b --- /dev/null +++ b/ext/mysql/libmysql/raid.h @@ -0,0 +1,155 @@ +/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this library; 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 */ + +extern const char *raid_type_string[]; + +#if defined(USE_RAID) + +#ifdef __GNUC__ +#pragma interface /* gcc class implementation */ +#endif +#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) my_raid_chsize(A,B,C) +#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, myf MyFlags); + int my_raid_close(File, myf MyFlags); + int my_raid_fstat(int Filedes, struct stat *buf, myf MyFlags); + + const char *my_raid_type(int raid_type); + +#ifdef __cplusplus +} + +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, 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 */