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530 lines
15 KiB
C
530 lines
15 KiB
C
/*****************************************************************************
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Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*****************************************************************************/
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/******************************************************************//**
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@file fut/fut0lst.c
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File-based list utilities
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Created 11/28/1995 Heikki Tuuri
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***********************************************************************/
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#include "fut0lst.h"
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#ifdef UNIV_NONINL
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#include "fut0lst.ic"
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#endif
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#include "buf0buf.h"
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#include "page0page.h"
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/********************************************************************//**
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Adds a node to an empty list. */
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static
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void
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flst_add_to_empty(
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/*==============*/
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flst_base_node_t* base, /*!< in: pointer to base node of
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empty list */
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flst_node_t* node, /*!< in: node to add */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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ulint space;
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fil_addr_t node_addr;
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ulint len;
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ut_ad(mtr && base && node);
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ut_ad(base != node);
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ut_ad(mtr_memo_contains_page(mtr, base, MTR_MEMO_PAGE_X_FIX));
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ut_ad(mtr_memo_contains_page(mtr, node, MTR_MEMO_PAGE_X_FIX));
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len = flst_get_len(base, mtr);
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ut_a(len == 0);
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buf_ptr_get_fsp_addr(node, &space, &node_addr);
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/* Update first and last fields of base node */
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flst_write_addr(base + FLST_FIRST, node_addr, mtr);
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flst_write_addr(base + FLST_LAST, node_addr, mtr);
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/* Set prev and next fields of node to add */
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flst_write_addr(node + FLST_PREV, fil_addr_null, mtr);
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flst_write_addr(node + FLST_NEXT, fil_addr_null, mtr);
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/* Update len of base node */
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mlog_write_ulint(base + FLST_LEN, len + 1, MLOG_4BYTES, mtr);
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}
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/********************************************************************//**
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Adds a node as the last node in a list. */
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UNIV_INTERN
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void
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flst_add_last(
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/*==========*/
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flst_base_node_t* base, /*!< in: pointer to base node of list */
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flst_node_t* node, /*!< in: node to add */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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ulint space;
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fil_addr_t node_addr;
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ulint len;
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fil_addr_t last_addr;
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flst_node_t* last_node;
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ut_ad(mtr && base && node);
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ut_ad(base != node);
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ut_ad(mtr_memo_contains_page(mtr, base, MTR_MEMO_PAGE_X_FIX));
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ut_ad(mtr_memo_contains_page(mtr, node, MTR_MEMO_PAGE_X_FIX));
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len = flst_get_len(base, mtr);
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last_addr = flst_get_last(base, mtr);
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buf_ptr_get_fsp_addr(node, &space, &node_addr);
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/* If the list is not empty, call flst_insert_after */
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if (len != 0) {
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if (last_addr.page == node_addr.page) {
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last_node = page_align(node) + last_addr.boffset;
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} else {
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ulint zip_size = fil_space_get_zip_size(space);
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last_node = fut_get_ptr(space, zip_size, last_addr,
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RW_X_LATCH, mtr);
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}
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flst_insert_after(base, last_node, node, mtr);
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} else {
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/* else call flst_add_to_empty */
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flst_add_to_empty(base, node, mtr);
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}
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}
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/********************************************************************//**
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Adds a node as the first node in a list. */
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UNIV_INTERN
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void
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flst_add_first(
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/*===========*/
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flst_base_node_t* base, /*!< in: pointer to base node of list */
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flst_node_t* node, /*!< in: node to add */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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ulint space;
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fil_addr_t node_addr;
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ulint len;
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fil_addr_t first_addr;
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flst_node_t* first_node;
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ut_ad(mtr && base && node);
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ut_ad(base != node);
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ut_ad(mtr_memo_contains_page(mtr, base, MTR_MEMO_PAGE_X_FIX));
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ut_ad(mtr_memo_contains_page(mtr, node, MTR_MEMO_PAGE_X_FIX));
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len = flst_get_len(base, mtr);
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first_addr = flst_get_first(base, mtr);
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buf_ptr_get_fsp_addr(node, &space, &node_addr);
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/* If the list is not empty, call flst_insert_before */
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if (len != 0) {
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if (first_addr.page == node_addr.page) {
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first_node = page_align(node) + first_addr.boffset;
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} else {
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ulint zip_size = fil_space_get_zip_size(space);
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first_node = fut_get_ptr(space, zip_size, first_addr,
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RW_X_LATCH, mtr);
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}
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flst_insert_before(base, node, first_node, mtr);
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} else {
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/* else call flst_add_to_empty */
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flst_add_to_empty(base, node, mtr);
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}
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}
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/********************************************************************//**
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Inserts a node after another in a list. */
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UNIV_INTERN
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void
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flst_insert_after(
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/*==============*/
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flst_base_node_t* base, /*!< in: pointer to base node of list */
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flst_node_t* node1, /*!< in: node to insert after */
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flst_node_t* node2, /*!< in: node to add */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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ulint space;
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fil_addr_t node1_addr;
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fil_addr_t node2_addr;
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flst_node_t* node3;
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fil_addr_t node3_addr;
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ulint len;
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ut_ad(mtr && node1 && node2 && base);
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ut_ad(base != node1);
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ut_ad(base != node2);
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ut_ad(node2 != node1);
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ut_ad(mtr_memo_contains_page(mtr, base, MTR_MEMO_PAGE_X_FIX));
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ut_ad(mtr_memo_contains_page(mtr, node1, MTR_MEMO_PAGE_X_FIX));
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ut_ad(mtr_memo_contains_page(mtr, node2, MTR_MEMO_PAGE_X_FIX));
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buf_ptr_get_fsp_addr(node1, &space, &node1_addr);
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buf_ptr_get_fsp_addr(node2, &space, &node2_addr);
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node3_addr = flst_get_next_addr(node1, mtr);
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/* Set prev and next fields of node2 */
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flst_write_addr(node2 + FLST_PREV, node1_addr, mtr);
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flst_write_addr(node2 + FLST_NEXT, node3_addr, mtr);
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if (!fil_addr_is_null(node3_addr)) {
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/* Update prev field of node3 */
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ulint zip_size = fil_space_get_zip_size(space);
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node3 = fut_get_ptr(space, zip_size,
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node3_addr, RW_X_LATCH, mtr);
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flst_write_addr(node3 + FLST_PREV, node2_addr, mtr);
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} else {
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/* node1 was last in list: update last field in base */
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flst_write_addr(base + FLST_LAST, node2_addr, mtr);
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}
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/* Set next field of node1 */
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flst_write_addr(node1 + FLST_NEXT, node2_addr, mtr);
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/* Update len of base node */
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len = flst_get_len(base, mtr);
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mlog_write_ulint(base + FLST_LEN, len + 1, MLOG_4BYTES, mtr);
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}
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/********************************************************************//**
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Inserts a node before another in a list. */
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UNIV_INTERN
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void
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flst_insert_before(
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/*===============*/
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flst_base_node_t* base, /*!< in: pointer to base node of list */
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flst_node_t* node2, /*!< in: node to insert */
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flst_node_t* node3, /*!< in: node to insert before */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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ulint space;
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flst_node_t* node1;
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fil_addr_t node1_addr;
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fil_addr_t node2_addr;
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fil_addr_t node3_addr;
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ulint len;
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ut_ad(mtr && node2 && node3 && base);
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ut_ad(base != node2);
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ut_ad(base != node3);
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ut_ad(node2 != node3);
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ut_ad(mtr_memo_contains_page(mtr, base, MTR_MEMO_PAGE_X_FIX));
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ut_ad(mtr_memo_contains_page(mtr, node2, MTR_MEMO_PAGE_X_FIX));
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ut_ad(mtr_memo_contains_page(mtr, node3, MTR_MEMO_PAGE_X_FIX));
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buf_ptr_get_fsp_addr(node2, &space, &node2_addr);
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buf_ptr_get_fsp_addr(node3, &space, &node3_addr);
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node1_addr = flst_get_prev_addr(node3, mtr);
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/* Set prev and next fields of node2 */
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flst_write_addr(node2 + FLST_PREV, node1_addr, mtr);
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flst_write_addr(node2 + FLST_NEXT, node3_addr, mtr);
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if (!fil_addr_is_null(node1_addr)) {
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ulint zip_size = fil_space_get_zip_size(space);
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/* Update next field of node1 */
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node1 = fut_get_ptr(space, zip_size, node1_addr,
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RW_X_LATCH, mtr);
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flst_write_addr(node1 + FLST_NEXT, node2_addr, mtr);
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} else {
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/* node3 was first in list: update first field in base */
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flst_write_addr(base + FLST_FIRST, node2_addr, mtr);
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}
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/* Set prev field of node3 */
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flst_write_addr(node3 + FLST_PREV, node2_addr, mtr);
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/* Update len of base node */
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len = flst_get_len(base, mtr);
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mlog_write_ulint(base + FLST_LEN, len + 1, MLOG_4BYTES, mtr);
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}
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/********************************************************************//**
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Removes a node. */
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UNIV_INTERN
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void
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flst_remove(
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/*========*/
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flst_base_node_t* base, /*!< in: pointer to base node of list */
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flst_node_t* node2, /*!< in: node to remove */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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ulint space;
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ulint zip_size;
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flst_node_t* node1;
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fil_addr_t node1_addr;
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fil_addr_t node2_addr;
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flst_node_t* node3;
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fil_addr_t node3_addr;
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ulint len;
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ut_ad(mtr && node2 && base);
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ut_ad(mtr_memo_contains_page(mtr, base, MTR_MEMO_PAGE_X_FIX));
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ut_ad(mtr_memo_contains_page(mtr, node2, MTR_MEMO_PAGE_X_FIX));
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buf_ptr_get_fsp_addr(node2, &space, &node2_addr);
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zip_size = fil_space_get_zip_size(space);
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node1_addr = flst_get_prev_addr(node2, mtr);
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node3_addr = flst_get_next_addr(node2, mtr);
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if (!fil_addr_is_null(node1_addr)) {
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/* Update next field of node1 */
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if (node1_addr.page == node2_addr.page) {
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node1 = page_align(node2) + node1_addr.boffset;
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} else {
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node1 = fut_get_ptr(space, zip_size,
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node1_addr, RW_X_LATCH, mtr);
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}
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ut_ad(node1 != node2);
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flst_write_addr(node1 + FLST_NEXT, node3_addr, mtr);
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} else {
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/* node2 was first in list: update first field in base */
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flst_write_addr(base + FLST_FIRST, node3_addr, mtr);
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}
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if (!fil_addr_is_null(node3_addr)) {
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/* Update prev field of node3 */
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if (node3_addr.page == node2_addr.page) {
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node3 = page_align(node2) + node3_addr.boffset;
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} else {
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node3 = fut_get_ptr(space, zip_size,
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node3_addr, RW_X_LATCH, mtr);
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}
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ut_ad(node2 != node3);
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flst_write_addr(node3 + FLST_PREV, node1_addr, mtr);
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} else {
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/* node2 was last in list: update last field in base */
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flst_write_addr(base + FLST_LAST, node1_addr, mtr);
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}
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/* Update len of base node */
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len = flst_get_len(base, mtr);
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ut_ad(len > 0);
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mlog_write_ulint(base + FLST_LEN, len - 1, MLOG_4BYTES, mtr);
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}
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/********************************************************************//**
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Cuts off the tail of the list, including the node given. The number of
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nodes which will be removed must be provided by the caller, as this function
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does not measure the length of the tail. */
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UNIV_INTERN
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void
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flst_cut_end(
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/*=========*/
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flst_base_node_t* base, /*!< in: pointer to base node of list */
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flst_node_t* node2, /*!< in: first node to remove */
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ulint n_nodes,/*!< in: number of nodes to remove,
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must be >= 1 */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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ulint space;
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flst_node_t* node1;
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fil_addr_t node1_addr;
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fil_addr_t node2_addr;
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ulint len;
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ut_ad(mtr && node2 && base);
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ut_ad(mtr_memo_contains_page(mtr, base, MTR_MEMO_PAGE_X_FIX));
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ut_ad(mtr_memo_contains_page(mtr, node2, MTR_MEMO_PAGE_X_FIX));
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ut_ad(n_nodes > 0);
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buf_ptr_get_fsp_addr(node2, &space, &node2_addr);
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node1_addr = flst_get_prev_addr(node2, mtr);
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if (!fil_addr_is_null(node1_addr)) {
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/* Update next field of node1 */
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if (node1_addr.page == node2_addr.page) {
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node1 = page_align(node2) + node1_addr.boffset;
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} else {
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node1 = fut_get_ptr(space,
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fil_space_get_zip_size(space),
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node1_addr, RW_X_LATCH, mtr);
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}
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flst_write_addr(node1 + FLST_NEXT, fil_addr_null, mtr);
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} else {
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/* node2 was first in list: update the field in base */
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flst_write_addr(base + FLST_FIRST, fil_addr_null, mtr);
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}
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flst_write_addr(base + FLST_LAST, node1_addr, mtr);
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/* Update len of base node */
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len = flst_get_len(base, mtr);
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ut_ad(len >= n_nodes);
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mlog_write_ulint(base + FLST_LEN, len - n_nodes, MLOG_4BYTES, mtr);
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}
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/********************************************************************//**
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Cuts off the tail of the list, not including the given node. The number of
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nodes which will be removed must be provided by the caller, as this function
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does not measure the length of the tail. */
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UNIV_INTERN
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void
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flst_truncate_end(
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/*==============*/
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flst_base_node_t* base, /*!< in: pointer to base node of list */
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flst_node_t* node2, /*!< in: first node not to remove */
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ulint n_nodes,/*!< in: number of nodes to remove */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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fil_addr_t node2_addr;
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ulint len;
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ulint space;
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ut_ad(mtr && node2 && base);
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ut_ad(mtr_memo_contains_page(mtr, base, MTR_MEMO_PAGE_X_FIX));
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ut_ad(mtr_memo_contains_page(mtr, node2, MTR_MEMO_PAGE_X_FIX));
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if (n_nodes == 0) {
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ut_ad(fil_addr_is_null(flst_get_next_addr(node2, mtr)));
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return;
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}
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buf_ptr_get_fsp_addr(node2, &space, &node2_addr);
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/* Update next field of node2 */
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flst_write_addr(node2 + FLST_NEXT, fil_addr_null, mtr);
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flst_write_addr(base + FLST_LAST, node2_addr, mtr);
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/* Update len of base node */
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len = flst_get_len(base, mtr);
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ut_ad(len >= n_nodes);
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mlog_write_ulint(base + FLST_LEN, len - n_nodes, MLOG_4BYTES, mtr);
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}
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/********************************************************************//**
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Validates a file-based list.
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@return TRUE if ok */
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UNIV_INTERN
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ibool
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flst_validate(
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/*==========*/
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const flst_base_node_t* base, /*!< in: pointer to base node of list */
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mtr_t* mtr1) /*!< in: mtr */
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{
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ulint space;
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ulint zip_size;
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const flst_node_t* node;
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fil_addr_t node_addr;
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fil_addr_t base_addr;
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ulint len;
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ulint i;
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mtr_t mtr2;
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ut_ad(base);
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ut_ad(mtr_memo_contains_page(mtr1, base, MTR_MEMO_PAGE_X_FIX));
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/* We use two mini-transaction handles: the first is used to
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lock the base node, and prevent other threads from modifying the
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list. The second is used to traverse the list. We cannot run the
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second mtr without committing it at times, because if the list
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is long, then the x-locked pages could fill the buffer resulting
|
|
in a deadlock. */
|
|
|
|
/* Find out the space id */
|
|
buf_ptr_get_fsp_addr(base, &space, &base_addr);
|
|
zip_size = fil_space_get_zip_size(space);
|
|
|
|
len = flst_get_len(base, mtr1);
|
|
node_addr = flst_get_first(base, mtr1);
|
|
|
|
for (i = 0; i < len; i++) {
|
|
mtr_start(&mtr2);
|
|
|
|
node = fut_get_ptr(space, zip_size,
|
|
node_addr, RW_X_LATCH, &mtr2);
|
|
node_addr = flst_get_next_addr(node, &mtr2);
|
|
|
|
mtr_commit(&mtr2); /* Commit mtr2 each round to prevent buffer
|
|
becoming full */
|
|
}
|
|
|
|
ut_a(fil_addr_is_null(node_addr));
|
|
|
|
node_addr = flst_get_last(base, mtr1);
|
|
|
|
for (i = 0; i < len; i++) {
|
|
mtr_start(&mtr2);
|
|
|
|
node = fut_get_ptr(space, zip_size,
|
|
node_addr, RW_X_LATCH, &mtr2);
|
|
node_addr = flst_get_prev_addr(node, &mtr2);
|
|
|
|
mtr_commit(&mtr2); /* Commit mtr2 each round to prevent buffer
|
|
becoming full */
|
|
}
|
|
|
|
ut_a(fil_addr_is_null(node_addr));
|
|
|
|
return(TRUE);
|
|
}
|
|
|
|
/********************************************************************//**
|
|
Prints info of a file-based list. */
|
|
UNIV_INTERN
|
|
void
|
|
flst_print(
|
|
/*=======*/
|
|
const flst_base_node_t* base, /*!< in: pointer to base node of list */
|
|
mtr_t* mtr) /*!< in: mtr */
|
|
{
|
|
const buf_frame_t* frame;
|
|
ulint len;
|
|
|
|
ut_ad(base && mtr);
|
|
ut_ad(mtr_memo_contains_page(mtr, base, MTR_MEMO_PAGE_X_FIX));
|
|
frame = page_align((byte*) base);
|
|
|
|
len = flst_get_len(base, mtr);
|
|
|
|
fprintf(stderr,
|
|
"FILE-BASED LIST:\n"
|
|
"Base node in space %lu page %lu byte offset %lu; len %lu\n",
|
|
(ulong) page_get_space_id(frame),
|
|
(ulong) page_get_page_no(frame),
|
|
(ulong) page_offset(base), (ulong) len);
|
|
}
|