mtr0log.ic File Reference

Mini-transaction logging routines. More...

#include "buf0dblwr.h"
#include "fsp0types.h"
#include "mach0data.h"
#include "trx0types.h"
#include "mysqld_error.h"

Functions
static bool	mlog_open (mtr_t *mtr, ulint size, byte *&buffer)
static bool	mlog_open_metadata (mtr_t *mtr, ulint size, byte *&buffer)
static void	mlog_close (mtr_t *mtr, byte *ptr)
	Closes a buffer opened to mlog. More...
static void	mlog_catenate_ulint (mtr_buf_t *mtr_buf, ulint val, mlog_id_t type)
	Concatenates 1 - 4 bytes to the mtr log. More...
static void	mlog_catenate_ulint (mtr_t *mtr, ulint val, mlog_id_t type)
	Concatenates 1 - 4 bytes to the mtr log. More...
static void	mlog_catenate_ulint_compressed (mtr_t *mtr, ulint val)
	Concatenates a compressed ulint to mlog. More...
static void	mlog_catenate_ull_compressed (mtr_t *mtr, uint64_t val)
	Catenates a compressed 64-bit integer to mlog. More...
static byte *	mlog_write_initial_dict_log_record (mlog_id_t type, table_id_t id, uint64_t version, byte *log_ptr, mtr_t *mtr)
static byte *	mlog_write_initial_log_record_low (mlog_id_t type, space_id_t space_id, page_no_t page_no, byte *log_ptr, mtr_t *mtr)
	Writes a log record about an operation. More...
static byte *	mlog_write_initial_log_record_fast (const byte *ptr, mlog_id_t type, byte *log_ptr, mtr_t *mtr)
	Writes the initial part of a log record (3..11 bytes). More...

Detailed Description

Mini-transaction logging routines.

Created 12/7/1995 Heikki Tuuri

Function Documentation

mlog_catenate_ulint() [1/2]

static void mlog_catenate_ulint ( mtr_buf_t *  mtr_buf, ulint  val, mlog_id_t  type  )

inlinestatic

Concatenates 1 - 4 bytes to the mtr log.

The value is not compressed.

Parameters

mtr_buf	in/out: buffer to write
val	in: value to write
type	in: type of value to write

mlog_catenate_ulint() [2/2]

static void mlog_catenate_ulint ( mtr_t *  mtr, ulint  val, mlog_id_t  type  )

inlinestatic

Concatenates 1 - 4 bytes to the mtr log.

The value is not compressed.

Parameters

mtr	in/out: mtr
val	in: value to write
type	in: MLOG_1BYTE, MLOG_2BYTES, MLOG_4BYTES

mlog_catenate_ulint_compressed()

static void mlog_catenate_ulint_compressed ( mtr_t *  mtr, ulint  val  )

inlinestatic

Concatenates a compressed ulint to mlog.

Parameters

mtr	in: mtr
val	in: value to write

mlog_catenate_ull_compressed()

static void mlog_catenate_ull_compressed ( mtr_t *  mtr, uint64_t  val  )

inlinestatic

Catenates a compressed 64-bit integer to mlog.

Parameters

mtr	in: mtr
val	in: value to write

mlog_close()

static void mlog_close ( mtr_t *  mtr, byte *  ptr  )

inlinestatic

Closes a buffer opened to mlog.

Parameters

mtr	in: mtr
ptr	in: buffer space from ptr up was not used

mlog_open()

static bool mlog_open ( mtr_t *  mtr, ulint  size, byte *&  buffer  )

inlinestatic

mlog_open_metadata()

static bool mlog_open_metadata ( mtr_t *  mtr, ulint  size, byte *&  buffer  )

inlinestatic

mlog_write_initial_dict_log_record()

static byte * mlog_write_initial_dict_log_record ( mlog_id_t  type, table_id_t  id, uint64_t  version, byte *  log_ptr, mtr_t *  mtr  )

inlinestatic

mlog_write_initial_log_record_fast()

static byte * mlog_write_initial_log_record_fast ( const byte *  ptr, mlog_id_t  type, byte *  log_ptr, mtr_t *  mtr  )

inlinestatic

Writes the initial part of a log record (3..11 bytes).

If the implementation of this function is changed, all size parameters to mlog_open() should be adjusted accordingly!

Returns

new value of log_ptr

Parameters

ptr	in: pointer to (inside) a buffer frame holding the file page where modification is made
type	in: log item type: MLOG_1BYTE, ...
log_ptr	in: pointer to mtr log which has been opened
mtr	in/out: mtr

mlog_write_initial_log_record_low()

static byte * mlog_write_initial_log_record_low ( mlog_id_t  type, space_id_t  space_id, page_no_t  page_no, byte *  log_ptr, mtr_t *  mtr  )

inlinestatic

Writes a log record about an operation.

Parameters

[in]	type	Redo log record type
[in]	space_id	Tablespace identifier
[in]	page_no	Page number
[in,out]	log_ptr	Current end of mini-transaction log
[in,out]	mtr	Mini-transaction

Returns

end of mini-transaction log