trx0rseg.cc File Reference

#include "trx0rseg.h"
#include "trx0undo.h"
#include "fut0lst.h"
#include "srv0srv.h"
#include "trx0purge.h"
#include "ut0bh.h"
#include "srv0mon.h"

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Functions
UNIV_INTERN ulint	trx_rseg_header_create (ulint space, ulint zip_size, ulint max_size, ulint rseg_slot_no, mtr_t *mtr)
UNIV_INTERN void	trx_rseg_mem_free (trx_rseg_t *rseg)
UNIV_INTERN trx_rseg_t *	trx_rseg_create (ulint space)
UNIV_INTERN void	trx_rseg_array_init (trx_sysf_t *sys_header, ib_bh_t *ib_bh, mtr_t *mtr)
UNIV_INTERN ulint	trx_rseg_get_n_undo_tablespaces (ulint *space_ids)

Detailed Description

Rollback segment

Created 3/26/1996 Heikki Tuuri

Definition in file trx0rseg.cc.

Function Documentation

UNIV_INTERN void trx_rseg_array_init	(	trx_sysf_t *	sys_header,
		ib_bh_t *	ib_bh,
		mtr_t *	mtr
	)

Creates the memory copies for rollback segments and initializes the rseg array in trx_sys at a database startup.

Parameters

sys_header	in/out: trx system header
ib_bh	in: rseg queue
mtr	in: mtr

Definition at line 350 of file trx0rseg.cc.

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UNIV_INTERN trx_rseg_t* trx_rseg_create

(

ulint

space

)

in: id of UNDO tablespace

Parameters

space

in: id of UNDO tablespace

Definition at line 301 of file trx0rseg.cc.

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UNIV_INTERN ulint trx_rseg_get_n_undo_tablespaces

(

ulint *

space_ids

)

out: array of space ids of UNDO tablespaces

Parameters

space_ids

out: array of space ids of UNDO tablespaces

Definition at line 369 of file trx0rseg.cc.

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UNIV_INTERN ulint trx_rseg_header_create	(	ulint	space,
		ulint	zip_size,
		ulint	max_size,
		ulint	rseg_slot_no,
		mtr_t *	mtr
	)

Creates a rollback segment header. This function is called only when a new rollback segment is created in the database.

Returns

page number of the created segment, FIL_NULL if fail

Parameters

space	in: space id
zip_size	in: compressed page size in bytes or 0 for uncompressed pages
max_size	in: max size in pages
rseg_slot_no	in: rseg id == slot number in trx sys
mtr	in: mtr

Definition at line 50 of file trx0rseg.cc.

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UNIV_INTERN void trx_rseg_mem_free

(

trx_rseg_t *

rseg

)

Free's an instance of the rollback segment in memory.

Definition at line 115 of file trx0rseg.cc.

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