#define RAID_TYPE_0 1
#define RAID_TYPE_x 2
#define RAID_TYPE_y 3
#define RAID_DEFAULT_CHUNKS 4
#define RAID_DEFAULT_CHUNKSIZE 256*1024
extern const char *raid_type_string[];
#ifdef __cplusplus
extern "C" {
#endif
const char *my_raid_type(int raid_type);
#ifdef __cplusplus
}
#endif
#if defined(USE_RAID) && !defined(DONT_USE_RAID)
#ifdef __GNUC__
#pragma interface
#endif
#include "my_dir.h"
#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
#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);
#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;
uint _raid_chunks;
ulong _raid_chunksize;
};
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;
private:
uint _raid_type;
uint _raid_chunks;
ulong _raid_chunksize;
ulong _total_block;
uint _this_block;
uint _remaining_bytes;
my_off_t _position;
my_off_t _size;
File _fd;
File *_fd_vector;
off_t *_seek_vector;
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;
_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
#endif