Annotation of parser3/src/sql/mysql/mySQL32/include/raid.h, revision 1.1
1.1 ! paf 1: /* Copyright (C) 1999 Monty Program KB
! 2:
! 3: This software is distributed with NO WARRANTY OF ANY KIND. No author or
! 4: distributor accepts any responsibility for the consequences of using it, or
! 5: for whether it serves any particular purpose or works at all, unless he or
! 6: she says so in writing. Refer to the Free Public License (the "License")
! 7: for full details.
! 8:
! 9: Every copy of this file must include a copy of the License, normally in a
! 10: plain ASCII text file named PUBLIC. The License grants you the right to
! 11: copy, modify and redistribute this file, but only under certain conditions
! 12: described in the License. Among other things, the License requires that
! 13: the copyright notice and this notice be preserved on all copies. */
! 14:
! 15:
! 16: /* Parser needs these defines always, even if USE_RAID is not defined */
! 17: #define RAID_TYPE_0 1 // Striping
! 18: #define RAID_TYPE_x 2 // Some new modes
! 19: #define RAID_TYPE_y 3 //
! 20:
! 21: #define RAID_DEFAULT_CHUNKS 4
! 22: #define RAID_DEFAULT_CHUNKSIZE 256*1024 /* 256kB */
! 23:
! 24: extern const char *raid_type_string[];
! 25:
! 26: #if defined(USE_RAID)
! 27:
! 28: #ifdef __GNUC__
! 29: #pragma interface /* gcc class implementation */
! 30: #endif
! 31: #include "my_dir.h"
! 32:
! 33: /* Trap all occurences of my_...() in source and use our wrapper around this function */
! 34:
! 35: #ifdef MAP_TO_USE_RAID
! 36: #define my_read(A,B,C,D) my_raid_read(A,B,C,D)
! 37: #define my_write(A,B,C,D) my_raid_write(A,B,C,D)
! 38: #define my_pwrite(A,B,C,D,E) my_raid_pwrite(A,B,C,D,E)
! 39: #define my_pread(A,B,C,D,E) my_raid_pread(A,B,C,D,E)
! 40: #define my_chsize(A,B,C) my_raid_chsize(A,B,C)
! 41: #define my_close(A,B) my_raid_close(A,B)
! 42: #define my_tell(A,B) my_raid_tell(A,B)
! 43: #define my_seek(A,B,C,D) my_raid_seek(A,B,C,D)
! 44: #define my_lock(A,B,C,D,E) my_raid_lock(A,B,C,D,E)
! 45: #define my_fstat(A,B,C) my_raid_fstat(A,B,C)
! 46: #endif /* MAP_TO_USE_RAID */
! 47:
! 48: #ifdef __cplusplus
! 49: extern "C" {
! 50: #endif
! 51:
! 52: void init_raid(void);
! 53: void end_raid(void);
! 54:
! 55: bool is_raid(File fd);
! 56: File my_raid_create(const char *FileName, int CreateFlags, int access_flags,
! 57: uint raid_type, uint raid_chunks, ulong raid_chunksize,
! 58: myf MyFlags);
! 59: File my_raid_open(const char *FileName, int Flags,
! 60: uint raid_type, uint raid_chunks, ulong raid_chunksize,
! 61: myf MyFlags);
! 62: int my_raid_rename(const char *from, const char *to, uint raid_chunks,
! 63: myf MyFlags);
! 64: int my_raid_delete(const char *from, uint raid_chunks, myf MyFlags);
! 65: int my_raid_redel(const char *old_name, const char *new_name,
! 66: uint raid_chunks, myf MyFlags);
! 67:
! 68: my_off_t my_raid_seek(File fd, my_off_t pos, int whence, myf MyFlags);
! 69: my_off_t my_raid_tell(File fd, myf MyFlags);
! 70:
! 71: uint my_raid_write(File,const byte *Buffer, uint Count, myf MyFlags);
! 72: uint my_raid_read(File Filedes, byte *Buffer, uint Count, myf MyFlags);
! 73:
! 74: uint my_raid_pread(File Filedes, byte *Buffer, uint Count, my_off_t offset,
! 75: myf MyFlags);
! 76: uint my_raid_pwrite(int Filedes, const byte *Buffer, uint Count,
! 77: my_off_t offset, myf MyFlags);
! 78:
! 79: int my_raid_lock(File,int locktype, my_off_t start, my_off_t length,
! 80: myf MyFlags);
! 81: int my_raid_chsize(File fd, my_off_t newlength, myf MyFlags);
! 82: int my_raid_close(File, myf MyFlags);
! 83: int my_raid_fstat(int Filedes, struct stat *buf, myf MyFlags);
! 84:
! 85: const char *my_raid_type(int raid_type);
! 86:
! 87: #ifdef __cplusplus
! 88: }
! 89:
! 90: class RaidName {
! 91: public:
! 92: RaidName(const char *FileName);
! 93: ~RaidName();
! 94: bool IsRaid();
! 95: int Rename(const char * from, const char * to, myf MyFlags);
! 96: private:
! 97: uint _raid_type; // RAID_TYPE_0 or RAID_TYPE_1 or RAID_TYPE_5
! 98: uint _raid_chunks; // 1..n
! 99: ulong _raid_chunksize; // 1..n in bytes
! 100: };
! 101:
! 102: class RaidFd {
! 103: public:
! 104: RaidFd(uint raid_type, uint raid_chunks , ulong raid_chunksize);
! 105: ~RaidFd();
! 106: File Create(const char *FileName, int CreateFlags, int access_flags,
! 107: myf MyFlags);
! 108: File Open(const char *FileName, int Flags, myf MyFlags);
! 109: my_off_t Seek(my_off_t pos,int whence,myf MyFlags);
! 110: my_off_t Tell(myf MyFlags);
! 111: int Write(const byte *Buffer, uint Count, myf MyFlags);
! 112: int Read(const byte *Buffer, uint Count, myf MyFlags);
! 113: int Lock(int locktype, my_off_t start, my_off_t length, myf MyFlags);
! 114: int Chsize(File fd, my_off_t newlength, myf MyFlags);
! 115: int Fstat(int fd, MY_STAT *stat_area, myf MyFlags );
! 116: int Close(myf MyFlags);
! 117: static bool IsRaid(File fd);
! 118: static DYNAMIC_ARRAY _raid_map; /* Map of RaidFD* */
! 119: private:
! 120:
! 121: uint _raid_type; // RAID_TYPE_0 or RAID_TYPE_1 or RAID_TYPE_5
! 122: uint _raid_chunks; // 1..n
! 123: ulong _raid_chunksize; // 1..n in bytes
! 124:
! 125: ulong _total_block; // We are operating with block no x (can be 0..many).
! 126: uint _this_block; // can be 0.._raid_chunks
! 127: uint _remaining_bytes; // Maximum bytes that can be written in this block
! 128:
! 129: my_off_t _position;
! 130: my_off_t _size; // Cached file size for faster seek(SEEK_END)
! 131: File _fd;
! 132: File *_fd_vector; /* Array of File */
! 133: off_t *_seek_vector; /* Array of cached seek positions */
! 134:
! 135: inline void Calculate()
! 136: {
! 137: DBUG_ENTER("RaidFd::_Calculate");
! 138: DBUG_PRINT("info",("_position: %lu _raid_chunksize: %d, _size: %lu",
! 139: (ulong) _position, _raid_chunksize, (ulong) _size));
! 140:
! 141: _total_block = (ulong) (_position / _raid_chunksize);
! 142: _this_block = _total_block % _raid_chunks; // can be 0.._raid_chunks
! 143: _remaining_bytes = (uint) (_raid_chunksize -
! 144: (_position - _total_block * _raid_chunksize));
! 145: DBUG_PRINT("info",
! 146: ("_total_block: %d this_block: %d _remaining_bytes:%d",
! 147: _total_block, _this_block, _remaining_bytes));
! 148: DBUG_VOID_RETURN;
! 149: }
! 150: };
! 151:
! 152: #endif /* __cplusplus */
! 153: #endif /* USE_RAID */
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