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plugin/innobase/include/read0read.h
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/*****************************************************************************
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Copyright (C) 1997, 2009, Innobase Oy. All Rights Reserved.
 
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Copyright (c) 1997, 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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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., 51 Franklin
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St, Fifth Floor, Boston, MA 02110-1301 USA
 
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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read_view_open_now(
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/*===============*/
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        trx_id_t        cr_trx_id,      /*!< in: trx_id of creating
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                                        transaction, or 0 used in purge */
 
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                                        transaction, or ut_dulint_zero
 
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                                        used in purge */
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        mem_heap_t*     heap);          /*!< in: memory heap from which
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                                        allocated */
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/*********************************************************************//**
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read_view_oldest_copy_or_open_new(
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/*==============================*/
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        trx_id_t        cr_trx_id,      /*!< in: trx_id of creating
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                                        transaction, or 0 used in purge */
 
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                                        transaction, or ut_dulint_zero
 
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                                        used in purge */
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        mem_heap_t*     heap);          /*!< in: memory heap from which
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                                        allocated */
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/*********************************************************************//**
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struct read_view_struct{
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        ulint           type;   /*!< VIEW_NORMAL, VIEW_HIGH_GRANULARITY */
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        undo_no_t       undo_no;/*!< 0 or if type is
 
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        undo_no_t       undo_no;/*!< ut_dulint_zero or if type is
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                                VIEW_HIGH_GRANULARITY
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                                transaction undo_no when this high-granularity
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                                consistent read view was created */
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                                that is, up_limit_id and low_limit_id. */
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        trx_id_t        creator_trx_id;
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                                /*!< trx id of creating transaction, or
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                                0 used in purge */
 
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                                ut_dulint_zero used in purge */
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        UT_LIST_NODE_T(read_view_t) view_list;
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                                /*!< List of read views in trx_sys */
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};