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Diffstat (limited to 'storage/xtradb/include/fut0lst.ic')
| -rw-r--r-- | storage/xtradb/include/fut0lst.ic | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/storage/xtradb/include/fut0lst.ic b/storage/xtradb/include/fut0lst.ic new file mode 100644 index 00000000000..5899e996059 --- /dev/null +++ b/storage/xtradb/include/fut0lst.ic @@ -0,0 +1,166 @@ +/***************************************************************************** + +Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program 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 General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA + +*****************************************************************************/ + +/********************************************************************** +File-based list utilities + +Created 11/28/1995 Heikki Tuuri +***********************************************************************/ + +#include "fut0fut.h" +#include "mtr0log.h" +#include "buf0buf.h" + +/* We define the field offsets of a node for the list */ +#define FLST_PREV 0 /* 6-byte address of the previous list element; + the page part of address is FIL_NULL, if no + previous element */ +#define FLST_NEXT FIL_ADDR_SIZE /* 6-byte address of the next + list element; the page part of address + is FIL_NULL, if no next element */ + +/* We define the field offsets of a base node for the list */ +#define FLST_LEN 0 /* 32-bit list length field */ +#define FLST_FIRST 4 /* 6-byte address of the first element + of the list; undefined if empty list */ +#define FLST_LAST (4 + FIL_ADDR_SIZE) /* 6-byte address of the + last element of the list; undefined + if empty list */ + +/************************************************************************ +Writes a file address. */ +UNIV_INLINE +void +flst_write_addr( +/*============*/ + fil_faddr_t* faddr, /* in: pointer to file faddress */ + fil_addr_t addr, /* in: file address */ + mtr_t* mtr) /* in: mini-transaction handle */ +{ + ut_ad(faddr && mtr); + ut_ad(mtr_memo_contains_page(mtr, faddr, MTR_MEMO_PAGE_X_FIX)); + ut_a(addr.page == FIL_NULL || addr.boffset >= FIL_PAGE_DATA); + ut_a(ut_align_offset(faddr, UNIV_PAGE_SIZE) >= FIL_PAGE_DATA); + + mlog_write_ulint(faddr + FIL_ADDR_PAGE, addr.page, MLOG_4BYTES, mtr); + mlog_write_ulint(faddr + FIL_ADDR_BYTE, addr.boffset, + MLOG_2BYTES, mtr); +} + +/************************************************************************ +Reads a file address. */ +UNIV_INLINE +fil_addr_t +flst_read_addr( +/*===========*/ + /* out: file address */ + const fil_faddr_t* faddr, /* in: pointer to file faddress */ + mtr_t* mtr) /* in: mini-transaction handle */ +{ + fil_addr_t addr; + + ut_ad(faddr && mtr); + + addr.page = mtr_read_ulint(faddr + FIL_ADDR_PAGE, MLOG_4BYTES, mtr); + addr.boffset = mtr_read_ulint(faddr + FIL_ADDR_BYTE, MLOG_2BYTES, + mtr); + ut_a(addr.page == FIL_NULL || addr.boffset >= FIL_PAGE_DATA); + ut_a(ut_align_offset(faddr, UNIV_PAGE_SIZE) >= FIL_PAGE_DATA); + return(addr); +} + +/************************************************************************ +Initializes a list base node. */ +UNIV_INLINE +void +flst_init( +/*======*/ + flst_base_node_t* base, /* in: pointer to base node */ + mtr_t* mtr) /* in: mini-transaction handle */ +{ + ut_ad(mtr_memo_contains_page(mtr, base, MTR_MEMO_PAGE_X_FIX)); + + mlog_write_ulint(base + FLST_LEN, 0, MLOG_4BYTES, mtr); + flst_write_addr(base + FLST_FIRST, fil_addr_null, mtr); + flst_write_addr(base + FLST_LAST, fil_addr_null, mtr); +} + +/************************************************************************ +Gets list length. */ +UNIV_INLINE +ulint +flst_get_len( +/*=========*/ + /* out: length */ + const flst_base_node_t* base, /* in: pointer to base node */ + mtr_t* mtr) /* in: mini-transaction handle */ +{ + return(mtr_read_ulint(base + FLST_LEN, MLOG_4BYTES, mtr)); +} + +/************************************************************************ +Gets list first node address. */ +UNIV_INLINE +fil_addr_t +flst_get_first( +/*===========*/ + /* out: file address */ + const flst_base_node_t* base, /* in: pointer to base node */ + mtr_t* mtr) /* in: mini-transaction handle */ +{ + return(flst_read_addr(base + FLST_FIRST, mtr)); +} + +/************************************************************************ +Gets list last node address. */ +UNIV_INLINE +fil_addr_t +flst_get_last( +/*==========*/ + /* out: file address */ + const flst_base_node_t* base, /* in: pointer to base node */ + mtr_t* mtr) /* in: mini-transaction handle */ +{ + return(flst_read_addr(base + FLST_LAST, mtr)); +} + +/************************************************************************ +Gets list next node address. */ +UNIV_INLINE +fil_addr_t +flst_get_next_addr( +/*===============*/ + /* out: file address */ + const flst_node_t* node, /* in: pointer to node */ + mtr_t* mtr) /* in: mini-transaction handle */ +{ + return(flst_read_addr(node + FLST_NEXT, mtr)); +} + +/************************************************************************ +Gets list prev node address. */ +UNIV_INLINE +fil_addr_t +flst_get_prev_addr( +/*===============*/ + /* out: file address */ + const flst_node_t* node, /* in: pointer to node */ + mtr_t* mtr) /* in: mini-transaction handle */ +{ + return(flst_read_addr(node + FLST_PREV, mtr)); +} |